CN215349326U - Medical puncturing device and medical instrument assembly - Google Patents

Abstract

The utility model belongs to the field of medical appliances, and discloses a medical puncture device and a medical appliance assembly. The device comprises: a needle cylinder; The connected pierceable movable sealing part; the hollow puncture needle is fixedly connected to the pressing part and is formed with a front end needle hole and a peripheral wall needle hole; at least one injection accommodating area is formed at the front closed end of the syringe and the peripheral wall of the inner cavity of the syringe In the inner cavity area of the syringe and the movable sealing part together; wherein, the medical puncture device is arranged to be able to push the hollow puncture needle forward to the front closed end of the puncture syringe by pressing the pressing part and make the injection accommodation area, The peripheral wall pinhole communicates with the front-end pinhole. In this way, the injection, probing, dilation or device implantation of the apparent or potential tissue space, lumen, and vessel of the animal can be realized, and in particular, precise control of the puncture depth, stable liquid injection and quantitative liquid injection can be achieved.

Description

Medical puncturing device and medical instrument assembly

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a medical puncturing device and a medical instrument assembly.

Background

At present, in medicine, when treating the tissue gaps, cavity systems and vessels of animals, the operations of injecting medicines and the like are carried out by using a conventional syringe. When puncturing, the puncturing depth of the syringe needle needs to be manually controlled, whether the needle punctures the target area is judged by depending on the experience of medical workers, but the physiological structures of different patients generally have differences, the experience of the medical workers is not necessarily accurate, and the puncturing accuracy cannot be effectively guaranteed. However, in order to stabilize the injection speed and prevent sudden and sudden fluid changes, a skilled operation technique is required by a medical care worker, but in practice, it is difficult to ensure the stability of each injection.

SUMMERY OF THE UTILITY MODEL

In view of at least one of the above-mentioned drawbacks or deficiencies of the prior art, the present invention provides a medical puncturing device and medical instrument assembly for enabling injection, access, expansion, or instrument implantation of an apparent or potential tissue space, cavity system, vessel, or in particular, for enabling precise control of puncture depth, stable infusion, and quantitative infusion.

To achieve the above object, a first aspect of the present invention provides a medical puncturing device, comprising:

the needle cylinder comprises a front closed end and a rear open end;

the elastic pushing assembly comprises a pressing part and a pierceable movable sealing part which is positioned in the inner cavity of the needle cylinder and can be elastically connected with the pressing part in a front-back manner;

the hollow puncture needle is fixedly connected to the pressing part and is provided with a front end needle hole and a peripheral wall needle hole;

the injection accommodating area is formed in a syringe cavity area which is encircled by the front closed end of the syringe, the peripheral wall of the syringe cavity and the movable sealing part together;

the medical puncture device is arranged to push the hollow puncture needle forwards to puncture the front closed end of the needle cylinder by pressing the pressing part, and the injection accommodating area, the peripheral wall needle hole and the front end needle hole are communicated.

Optionally, the medical puncturing device comprises a flow guiding state which enables the injection accommodating area, the peripheral wall needle hole and the front end needle hole to be communicated, and in the flow guiding state, the movable sealing part can move forwards to block the peripheral wall needle hole under the effect of resilience force between the movable sealing part and the pressing part.

Optionally, in the diversion state, the movable sealing part blocks the circumferential wall needle hole when moving forwards to abut against the front closed end of the needle cylinder.

Optionally, an axial limiting portion which is located in front of the movable sealing portion and used for limiting the movable sealing portion to move forward is arranged in the inner cavity of the needle cylinder, the medical puncturing device comprises a flow guiding state enabling the injection accommodating area, the peripheral wall needle hole and the front end needle hole to be communicated, the peripheral wall needle hole is located in front of the axial limiting portion in the flow guiding state, and the movable sealing portion can move forward under the action of resilience force between the pressing portions.

Optionally, the medical puncturing device comprises a manual control part which is connected with the movable sealing part and partially extends out of the syringe.

Optionally, the movable sealing part and the manual control part form a front-back elastic connection.

Optionally, the needle cylinder is provided with a needle cylinder peripheral wall sliding groove extending in the axial direction on a peripheral wall part located behind the movable sealing part, the manual control part comprises a pressurization control sliding block in sliding fit with the needle cylinder peripheral wall sliding groove, and the movable sealing part and the pressurization control sliding block are in front-back elastic connection.

Optionally, the medical puncturing device comprises a surface tissue puncturing state and a flow guiding state after the hollow puncturing needle punctures the front closed end of the needle cylinder, and the length range of the hollow puncturing needle extending out of the front closed end of the needle cylinder is correspondingly a surface tissue puncturing length range and a flow guiding length range in the surface tissue puncturing state and the flow guiding state;

wherein said peripheral wall needle aperture remains above said injection receiving area until said hollow spike protrudes from said forward closed end of said barrel;

and/or when the length of the hollow puncture needle extending out of the front closed end of the needle cylinder is within the range of the surface tissue puncture length, the peripheral wall needle hole is at least partially communicated with the injection accommodating area;

and/or when the length of the hollow puncture needle extending out of the front closed end of the needle cylinder is within the diversion length range, the circumferential wall needle hole is positioned in the injection accommodating area.

Optionally, the medical puncturing device comprises at least one penetrable isolation sealing part which is arranged in the area of the inner cavity of the syringe between the movable sealing part and the front closed end of the syringe and can slide along the axial direction, and the injection accommodating area is formed with a plurality of parts which are axially isolated by the isolation sealing part.

Optionally, the medical puncturing device further comprises an implant guide structure for guiding an implant into the needle lumen of the hollow puncturing needle.

Optionally, the implant guide structure includes an inclined guide groove formed on the movable sealing portion and extending obliquely toward the hollow puncture needle.

Optionally, the inclined guide groove is arranged to extend through the implant guide structure in the front-rear direction, and the implant guide structure further includes a one-way valve assembly which is embedded in the inclined guide groove and can be opened and closed or a guide groove sealing member which is inserted into the inclined guide groove.

Alternatively, the inclined guide groove is formed on an upper surface of the movable seal portion and is a non-penetrating groove.

Alternatively, the peripheral wall pinhole is formed as an inclined hole that opens obliquely rearward.

Optionally, the implant guide structure includes an inclined guide needle hole formed in a peripheral wall of the hollow puncture needle and opened obliquely rearward, and the medical puncture device includes a flow guiding state in which the injection accommodating section, the peripheral wall needle hole and the front end needle hole are communicated, and in the flow guiding state, the inclined guide needle hole is located rearward of the movable sealing portion.

Optionally, the implant guide structure further comprises a one-way valve assembly which is embedded in the inclined guide needle hole and can be opened and closed or a needle hole sealing member which is inserted in the inclined guide needle hole.

Optionally, the implant guiding structure includes a middle guiding groove formed in the middle of the rear end face of the pressing portion and capable of being punctured, the hollow puncture needle is formed with a rear end needle hole, and the rear end needle hole and the middle guiding groove are arranged in an axially aligned manner.

Optionally, the medical puncturing device comprises a puncturing control module and a fluid storage module which are processed and formed independently;

the puncture control module comprises a first syringe unit, and the elastic pushing assembly and the hollow puncture needle which are arranged in a syringe cavity of the first syringe unit;

the fluid storage module comprises a second syringe unit, the injection-containing zone formed within a barrel chamber of the second syringe unit, and a module enclosure removably enclosed at a rearward end of the second syringe unit;

a detachable connection structure is formed between the first syringe unit and the second syringe unit.

Optionally, the medical puncturing device comprises a puncturing control module and a fluid storage module which are processed and formed independently;

the puncture control module comprises a first needle cylinder unit, and the pressing part and the hollow puncture needle which are arranged in a cylinder cavity of the first needle cylinder unit;

the fluid storage module comprises a second syringe unit, the injection receiving area formed within a barrel cavity of the second syringe unit, and the movable seal encapsulated at a rearward end of the second syringe unit;

a detachable connection structure is formed between the first syringe unit and the second syringe unit.

Optionally, the medical puncturing device comprises a puncturing control module, a transition connection module and a fluid storage module which are processed and formed independently;

the puncture control module comprises a first needle cylinder unit, and the pressing part and the hollow puncture needle which are arranged in a cylinder cavity of the first needle cylinder unit;

the transition connection module comprises a second syringe unit and the movable sealing part arranged in a syringe cavity of the second syringe unit;

the fluid storage module comprises a third syringe unit, the injection-containing zone formed within the barrel chamber of the third syringe unit, and a module enclosure removably enclosed at a rearward end of the third syringe unit;

the first syringe unit, the second syringe unit and the third syringe unit are detachably connected in sequence.

In a second aspect, the present invention provides a medical instrument assembly comprising an implant and a medical puncturing device as described above, provided with an implant guiding structure.

Optionally, the medical instrument assembly further comprises a hollow auxiliary guide needle used in cooperation with the implant guide structure, and the implant can be sequentially passed through the needle cavity of the auxiliary guide needle and the implant guide structure to be introduced into the needle cavity of the hollow puncture needle in a state where the auxiliary guide needle is connected to the implant guide structure.

When the medical puncture device is used for puncture, pressure is firstly applied to the pressing part to drive the hollow puncture needle to puncture the front closed end of the needle cylinder, and when the hollow puncture needle punctures the obvious or potential tissue gaps, cavity systems and vessels and the circumferential wall needle hole is positioned in the injection accommodating area, the circumferential wall needle hole and the front end needle hole are communicated. Through reasonable design, the pressure of the injection in the injection containing area is higher than the pressure in the visible or potential tissue gaps, cavity systems and vessels, and the injection can sequentially flow into the visible or potential tissue gaps, cavity systems and vessels through the peripheral wall needle hole and the front end needle hole under the condition of pressure difference.

In the injection process, the movable sealing part and the pressing part are elastically connected front and back, so that the pressing part is only required to be pressed, the pressing force does not need to be further increased, the injection can continuously flow into the needle hole in the peripheral wall under the action of the resilience force between the movable sealing part and the pressing part, and the injection, the probing and the expansion of the apparent or potential tissue gaps, cavity systems and vessels are realized. In addition, the medical instrument assembly of the present invention can also be used for implanting a medical instrument such as an implant by using a medical puncturing device provided with an implant guide structure.

Particularly, before the hollow puncture needle is inserted into the apparent or potential tissue gaps, cavity systems and vessels, the external pressure applied to the front end needle hole is larger than the injection pressure of the injection containing area, so that the injection cannot flow out of the front end needle hole, and whether the hollow puncture needle is inserted into the apparent or potential tissue gaps, cavity systems and vessels can be judged by observing whether the movable sealing part moves forwards under the action of the resilience force between the movable sealing part and the pressing part, so that an operator is reminded of the current puncture depth, and the accurate control of the puncture depth is ensured. And because the injection is controlled by the pressure change of the injection accommodating area, the applied thrust does not need to be artificially and continuously increased in the injection process, the fluid can be prevented from suddenly and suddenly flowing, and the stable injection is ensured.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIGS. 1-5 are schematic views of a medical puncturing device in accordance with an embodiment of the present invention in various states during tissue clearance, cavity system, vessel puncture and fluid injection in an animal;

FIGS. 6-10 are schematic views of another medical puncturing device in accordance with an embodiment of the utility model in different states during puncturing of an animal tissue space, a cavity system, a vessel, and an infusion;

FIGS. 11-13 are schematic views showing a portion of a medical puncturing device having a plurality of injection receiving areas according to an embodiment of the present invention in different states;

FIGS. 14-16 are schematic views showing a partial structure of another medical puncturing device having a plurality of injection receiving areas according to an embodiment of the present invention in different states;

FIG. 17 is a partial schematic view of a medical puncturing device having an angled guide slot therethrough and a one-way valve assembly in accordance with an embodiment of the present invention;

FIG. 18 is a partial schematic structural view of a medical instrument assembly incorporating the medical puncturing device of FIG. 17;

FIG. 19 is a partial schematic view of a medical puncturing device having a non-penetrating inclined guide groove according to an embodiment of the present invention;

FIG. 20 is a schematic partial sectional view of a medical puncturing device having an angled guide needle aperture and a one-way valve assembly in accordance with an embodiment of the present invention;

FIG. 21 is a partial schematic view of a medical puncturing device having an angled guide needle aperture and a needle aperture seal in accordance with an embodiment of the utility model;

FIG. 22 is a schematic view of an implant being placed into a tissue space, cavity system, vessel of an animal using a medical instrument assembly having a medial guide channel according to an embodiment of the present invention;

fig. 23 to 26 are schematic views of another medical puncturing device in accordance with an embodiment of the present invention in different states during puncturing of an animal tissue space, cavity system, vessel and fluid injection.

Description of reference numerals:

1 needle cylinder 2 pressing part

3 Movable seal part 4 elastic sheath

5 (5') spring 6 hollow puncture needle

7 front end sealing member of injection accommodation area 8

9 one-way valve assembly 10 pinhole sealing element

11 implant 12 supplemental guide needle

13 isolation seal 21 pressurization control slide block

1a axial limiting part 2c middle guide groove

3a inclined guide groove 6a front end pinhole

6c inclined guide needle hole of 6b peripheral wall

7a front injection holding area 7b rear injection holding area

6b1 front wall pinhole 6b2 rear wall pinhole

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the utility model, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present invention, the terms "front, back, forward, backward, front, back" and the like are used in accordance with the visual angle of an operator (e.g., surgeon, doctor, nurse, technician, etc.) who uses the medical puncturing device or medical instrument assembly of the present invention, that is, when the operator uses the medical puncturing device or medical instrument assembly, the direction relatively far from the operator is a forward direction, and the direction relatively close to the operator is a backward direction.

The utility model will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings.

As shown in fig. 1 to 22, a first exemplary embodiment of the present invention provides a medical puncturing device including a cylinder 1, an elastic push unit, a hollow puncturing needle 6, and at least one injection agent accommodating section 7.

Wherein, cylinder 1 includes preceding closed end of cylinder and open end behind the cylinder, when the productization, can design into along the open-ended structure in axial both ends with cylinder 1, through set up front end sealing member 8 in the front end opening part of cylinder 1 in order to realize sealed, this front end sealing member 8 need adopt the material that can be punctured by cavity pjncture needle 6 such as rubber.

Elastic pushing assembly includes pressing portion 2 and movable sealing portion 3, movable sealing portion 3 is arranged in the needle cylinder inner chamber and can move along the axial direction, press portion 2 and stretch out the needle cylinder rear opening end usually at least partially outside in order to supply operating personnel manual pressure, through exerting pressure to pressing portion 2, movable sealing portion 3 with press portion 2 can form front and back elastic connection, if keep pressing the position of portion 2 unchangeably this moment, movable sealing portion 3 with press the rebound force effect between portion 2 and have the trend of moving forward.

Furthermore, the pressing part 2 may further include a portion extending into the inner cavity of the syringe, and the portion may define a sealed area together with the circumferential wall of the inner cavity of the syringe and the movable sealing part 3, that is, a sealed area may be formed behind the movable sealing part 3, and the sealed area may contain a medium, such as a sterilizing gas, which may or may not flow. Or, the part of the pressing part 2 extending into the inner cavity of the syringe can also define a non-sealed area together with the circumferential wall of the inner cavity of the syringe and the movable sealing part 3, that is, the rear part of the movable sealing part 3 can be formed with the non-sealed area for connecting with the external environment.

The hollow puncture needle 6 is fixedly connected to the pressing part 2, and the hollow puncture needle 6 does not move forward to puncture the front closed end of the cylinder under the condition that the pressing part 2 is not pressurized, but the hollow puncture needle 6 is not limited to the state of puncturing the front closed end of the cylinder when the product is shipped. The hollow puncture needle 6 itself is formed with a tip needle hole 6a and a peripheral needle hole 6b, and the tip needle hole 6a and the peripheral needle hole 6b communicate with each other through the needle chamber of the hollow puncture needle 6.

The injection agent housing section 7 is for storing an injection agent. The injection includes, but is not limited to, liquid, solution, suspension, gel, oil, ointment, emulsion, cream, foam, lotion, paste, etc., which can be stored in the injection-containing region 7 individually or in a mixture. Injectable formulations preferably employ easily manipulated liquids (e.g., solutions, suspensions, etc.) or semi-solid compositions (e.g., gels), and are preferably capable of setting after injection and expansion of tissue spaces, cavities, vessels. For example, injection may be made at or near the target site, and the injection subsequently coagulated and set, possibly with greater strength to maintain a dilated tissue space, cavity system, vessel.

Injections may be flowable, including preparations with low viscosity, high viscosity, or water-like viscosity, such as paste-like materials. The fluidity of the formulation may allow it to conform to irregularities, crevices and/or voids of the tissue site. For example, the formulation can be used to fill one or more voids, enlarge tissue voids (e.g., manifest tissue voids) and/or form potential tissue voids into manifest tissue voids, and optionally enlarge the resulting voids. In addition, some injectable agents may also harden upon contact with aqueous media (e.g., body fluids, water, etc.) to form a drug depot that facilitates controlled release of the drug.

The injection containing area 7 is formed in the inner cavity area of the syringe which is enclosed by the front closed end of the syringe, the circumferential wall of the inner cavity of the syringe and the movable sealing part 3. Since the movable seal portion 3 is movable in the axial direction during injection, the injection agent containing region 7 has a variable volume, so that the injection agent pressure in the injection agent containing region 7 can be varied with the axial movement of the movable seal portion 3.

When puncturing with the medical puncturing device of the present exemplary embodiment, the hollow puncturing needle 6 can be pushed forward by applying pressure to the pressing part 2 to puncture the front closed end of the cylinder, and when the hollow puncturing needle 6 punctures the exposed or potential tissue space, cavity system, vessel and the peripheral wall needle hole 6b is located in the injection agent accommodating area 7, the peripheral wall needle hole 6b and the front end needle hole 6a communicate. Through reasonable design, the pressure of the injection in the injection containing area 7 can be higher than the pressure in the apparent or potential tissue gaps, cavity systems and vessels, and the injection can sequentially flow into the apparent or potential tissue gaps, cavity systems and vessels through the peripheral wall needle hole 6b and the front end needle hole 6a under the condition of pressure difference.

In the injection process, the movable sealing part 3 and the pressing part 2 are elastically connected front and back, so that the injection can continuously flow into the circumferential wall needle hole 6b under the action of the resilience force between the movable sealing part 3 and the pressing part 2 only by keeping pressing the pressing part 2 without further increasing the pressing force, and the injection, the probing and the expansion of the apparent or potential tissue gaps, cavity systems and vessels are realized.

Before the hollow puncture needle 6 penetrates into the apparent or potential tissue space, cavity system, vessel, the external pressure at the front needle hole 6a is larger than the injection agent pressure in the injection agent containing area 7, so that the injection agent can not flow out from the front needle hole 6 a. For example, in the case of the process of puncturing the suprachoroidal space of the eye, when the hollow puncture needle 6 punctures the sclera but does not puncture the suprachoroidal space, no matter whether the peripheral wall needle hole 6b is communicated with the injection accommodation region 7, the injection does not flow out from the front end needle hole 6a, because the sclera is dense, when the front end needle hole 6a is located in the sclera, it is equivalent to that a large external pressure is formed at the front end needle hole 6a, and the external pressure is greater than the injection pressure in the injection accommodation region 7, so that the injection cannot flow out.

Therefore, whether the movable sealing part 3 moves forwards under the action of resilience force between the movable sealing part and the pressing part 2 can be judged to judge whether the hollow puncture needle 6 is punctured into a visible or potential tissue gap, cavity system and vessel, so that the current puncture depth of an operator is reminded, and the precise control of the puncture depth is ensured. And because the injection is controlled by the injection pressure change in the injection containing area 7, the applied thrust does not need to be manually increased in the injection process, so that the injection can be prevented from being suddenly and suddenly slowed, and the stable injection is ensured.

In some embodiments, the medical puncturing device further comprises at least one pierceable isolation seal 13 disposed in the region of the syringe cavity between the movable seal 3 and the front closed end of the syringe and capable of sliding in the axial direction. In this structure, the injection agent housing section 7 is formed in plural, and the plural injection agent housing sections 7 are arranged in series in an axially spaced manner by the isolation seal portion 13. Wherein, a plurality of injection agent containing areas 7 can store the same injection agent and can also store different injection agents.

For example, referring to fig. 11 to 16, the injection agent housing section 7 includes a front injection agent housing section 7a and a rear injection agent housing section 7b which are separated front and rear.

In the embodiment shown in fig. 11 to 13, the peripheral wall pin holes 6b include front and rear peripheral wall pin holes arranged at a front-rear interval. Under this structure, if the hollow puncture needle 6 is first punctured to make the front wall needle hole communicate with the front injection agent containing area 7a and the rear wall needle hole is surrounded and sealed by the isolation sealing part 13, the injection agent in the front injection agent containing area 7a will flow into the apparent or potential tissue gap, cavity system and vessel through the front wall needle hole and the front end needle hole 6a in sequence, under the effect of the resilience force between the movable sealing part 3 and the pressing part 2, the injection amount in the front injection agent containing area 7a is continuously reduced, and the movable sealing part 3 and the isolation sealing part 13 are continuously moved forward. Through reasonable design, before the front circumferential wall needle hole is blocked by the isolation sealing part 13, the rear circumferential wall needle hole is communicated with the rear injection accommodating area 7b, so that the injection in the rear injection accommodating area 7b sequentially flows into the apparent or potential tissue gaps, cavity systems and vessels through the rear circumferential wall needle hole and the front end needle hole 6 a. Thus, in this embodiment, sequential injection of injectate within the front and back injectate-containing zones 7a and 7b into the apparent or potential tissue spaces, vasculature can be achieved.

In another embodiment shown in fig. 11 to 13, the hollow puncture needle 6 may be punctured such that the front wall needle hole communicates with the front injection agent containing region 7a and the rear wall needle hole communicates with the rear injection agent containing region 7b, thereby mixing the injection agents in the front injection agent containing region 7a and the rear injection agent containing region 7b and injecting the mixture into the apparent or potential tissue space, cavity system, or vessel.

In the embodiment shown in fig. 14 to 16, only one peripheral needle hole 6b is provided, and by proper design, the hollow puncture needle 6 can be punctured such that the front portion of the peripheral needle hole 6b communicates with the front injection agent housing area 7a and the rear portion of the peripheral needle hole 6b is enclosed and sealed by the isolation seal portion 13. At this time, the injection in the front injection housing area 7a flows into the apparent or potential tissue gap, cavity system, and vessel through the front part of the peripheral wall needle hole 6b and the front end needle hole 6a, and the injection in the front injection housing area 7a is reduced by the resilient force between the movable seal part 3 and the pressing part 2, and the movable seal part 3 and the separation seal part 13 are moved forward. Also, by proper design, the rear part of the peripheral wall needle hole 6b can be communicated with the back injection containing area 7b before the isolation sealing part 13 blocks the front part of the front peripheral wall needle hole, so that the injection in the back injection containing area 7b can flow into the apparent or potential tissue gaps, cavity systems and vessels through the rear part of the peripheral wall needle hole 6b and the front end needle hole 6a in sequence. Thus, in this embodiment, sequential injection of injectate within the front and back injectate-containing zones 7a and 7b into the apparent or potential tissue spaces, vasculature can also be achieved.

In another embodiment shown in fig. 14 to 16, the hollow puncture needle 6 may be punctured such that the front portion of the peripheral wall needle hole 6b communicates with the front injection agent housing area 7a, the rear portion of the peripheral wall needle hole 6b communicates with the rear injection agent housing area 7b, and the portion between the front portion and the rear portion of the peripheral wall needle hole 6b is enclosed and sealed by the isolation seal portion 13, so that the injection agents in the front injection agent housing area 7a and the rear injection agent housing area 7b can be mixed and injected into the apparent or potential tissue space, cavity system, or vessel.

It should be noted that the explicit or potential interstitial spaces, cavity systems, and vessels described herein may be suprachoroidal space, epidural space, pleural space, peritoneal cavity, joint cavity, artery, vein, etc., and are not particularly limited, so that the medical puncturing device of the present exemplary embodiment also has an advantage of strong versatility.

The specific position of the hollow puncture needle 6 may be slightly different after the medical puncture device of the present exemplary embodiment is shipped and before it is used, that is, the medical puncture device may be set in various shipped configurations.

For example, the hollow piercing needle 6 has punctured the movable seal 3 but not the front closed end of the barrel. At this time, the peripheral wall needle hole 6b may be located behind the movable sealing portion 3, enclosed and sealed by the movable sealing portion 3 or communicated with the injection agent containing area 7, and the front end needle hole 6a may be communicated with the injection agent containing area 7 or enclosed and sealed by the front closed end of the syringe.

Alternatively, the hollow piercing needle 6 has pierced the movable seal 3 and the forward closed end of the barrel. At this time, the peripheral wall needle hole 6b may be located behind the movable sealing portion 3, enclosed and sealed by the movable sealing portion 3 or communicated with the injection agent accommodating area 7, and the front end needle hole 6a is located outside the front closed end of the syringe.

Alternatively, the hollow puncture needle 6 does not puncture the movable seal portion 3, i.e., the entire portion is located rearward of the movable seal portion 3. Accordingly, the peripheral wall pin hole 6b and the front end pin hole 6a are both located rearward of the movable seal portion 3.

Therefore, as long as the peripheral wall needle hole 6b is not communicated with the injection accommodating area 7 when the product leaves the factory, the possibility that the injection leaks from the front end needle hole 6a before puncturing can be avoided no matter whether the hollow puncturing needle 6 punctures the movable sealing part 3 and the front closed end of the needle cylinder or not and whether the front end needle hole 6a is positioned outside the front closed end of the needle cylinder or not.

In fact, as can be seen from the foregoing, if the external pressure applied to the front needle hole 6a before the communication between the exposed or potential tissue gaps, cavity systems, and vessels is made larger than the pressure of the injection agent in the injection agent containing region 7 by proper design, even if the peripheral needle hole 6b communicates with the injection agent containing region 7 at the time of product shipment, the injection agent does not leak out from the front needle hole 6a in advance.

Further, in the case where the injection agent flows backward as the peripheral wall needle hole 6b is located behind the movable seal portion 3 and the front end needle hole 6a is located in the injection agent accommodation area 7, a corresponding embodiment will be described as a remedy, and will not be described in detail here.

In different product forms, it is preferable that the hollow puncture needle 6 does not puncture the movable seal portion 3 when the product is shipped, that is, the hollow puncture needle 6 is entirely located behind the movable seal portion 3. When the medical puncture device with the factory-leaving shape is used for puncture, the pressing part 2 is pressed to drive the hollow puncture needle 6 to puncture the movable sealing part 3 and the front closed end of the needle cylinder forwards in sequence until the front end needle hole 6a enters the apparent or potential tissue gap, cavity system and vessel and the peripheral wall needle hole 6b is communicated with the injection accommodating area 7.

In order to ensure that the hollow puncture needle 6 can finally puncture the front closed end of the needle cylinder, a puncture guide structure such as a guide groove, a guide blind hole or a guide slit for guiding the hollow puncture needle 6 to puncture can be arranged on the rear end face of the movable sealing part 3.

After the hollow puncture needle 6 punctures the front closed end of the needle cylinder, the medical puncture device at least comprises two different states, namely a surface tissue puncture state and a flow guiding state.

In the surface tissue puncture state, the length range of the hollow puncture needle 6 extending from the front closed end of the needle cylinder is the surface tissue puncture length range, in the range, the front end of the hollow puncture needle 6 penetrates into the surface tissue but does not penetrate into the apparent or potential tissue gaps, cavities and vessels, and because the surface tissue is compact, the external pressure applied to the front end needle hole 6a is greater than the injection pressure in the injection containing area 7, so the injection cannot flow out no matter whether the peripheral wall needle hole 6b is communicated with the injection containing area 7 or not.

In the diversion state, the length range of the hollow puncture needle 6 extending from the front closed end of the needle cylinder is the diversion length range, and in the diversion length range, the hollow puncture needle 6 is already inserted into the obvious or potential tissue gaps, cavity systems and vessels. As previously mentioned, proper design can be used to ensure that the pressure of the injectate within the injectate-containing region 7 is greater than the pressure within the apparent or potential tissue space, cavity system, or vessel. When the peripheral wall needle hole 6b is communicated with the injection containing area 7, under the condition of internal and external pressure difference, the injection in the injection containing area 7 can flow into the apparent or potential tissue gaps, cavity systems and vessels through the peripheral wall needle hole 6b and the front end needle hole 6a in sequence.

Various alternative embodiments for controlling the stopping of the injection operation of the medical puncturing device are described below.

In one embodiment, when the medical puncturing device is in a flow guiding state, the movable sealing part 3 can move forwards to block the peripheral wall needle hole 6b under the action of the resilience force between the movable sealing part and the pressing part 2, and the liquid injection action is stopped immediately after the peripheral wall needle hole 6b is blocked. It follows that the axial position of the peripheral wall needle hole 6b in the injection agent containing section 8 defines the maximum injection amount of the medical puncturing device.

For example, when the injection storage area 7 needs to be emptied, the movable seal 3 may be limited to close off the peripheral needle hole 6b when moving forward to abut against the front closed end of the cylinder, so that the peripheral needle hole 6b is located at the front end of the injection storage area 7. However, in practice, as the injection in the injection storage section 7 gradually flows into the apparent or potential tissue space, cavity system, or vessel, the pressure of the injection in the injection storage section 7 is equal to the pressure in the apparent or potential tissue space, cavity system, or vessel, and the movable seal portion 3 is not moved due to the force balance. To evacuate the injection agent containing region 7, the forward pushing force applied to the movable seal portion 3 is also increased.

For example, referring to the embodiment shown in fig. 6 to 10, a sliding groove (not shown) extending along the axial direction may be provided on the circumferential wall of the syringe 1, and a sliding block (i.e. the portion of the pressing portion 2 extending out of the syringe 1) matching with the sliding groove may be provided on the pressing portion 2, so that the upper limit of the pressing moving stroke of the pressing portion 2 is larger, when the movable sealing portion 3 is no longer moving due to the balance of the forces, a larger pressing force may be applied to the sliding block of the pressing portion 2, the pressing portion 2 is driven to move forward continuously, the resilience between the movable sealing portion 3 and the pressing portion 2 is increased, the balance of the forces of the movable sealing portion 3 is broken, and the movable sealing portion 3 is moved forward continuously, so that the injection agent accommodating area 7 may discharge more fluid, even empty.

Alternatively, the movable seal 3 may be further urged into abutment with the forward closed end of the barrel by other actuation arrangements, an alternative of which will be described in the following examples.

In another embodiment, the medical puncturing device comprises a manual control part which is connected with the movable sealing part 3 and partially extends out of the syringe. For example, the movable sealing portion 3 may be elastically connected with the manual control portion in the front-rear direction, or the manual control portion may be directly fixedly connected with the movable sealing portion 3, but obviously, in the case of forming the elastic connection, it is more beneficial to maintain a stable liquid injection speed.

When the injection dosage injected into the obvious or potential tissue gaps, cavity systems and vessels does not reach the preset target and the movable sealing part 3 does not move any more due to the stress balance, an operator can control the part extending out of the needle cylinder in the manual control part to drive the movable sealing part 3 to move forwards continuously until the externally-discharged injection dosage reaches the preset target. With the solution of the present embodiment, the problem that the injection agent accommodating section 7 cannot be emptied in the previous embodiment can be solved. Of course, the present embodiment is not limited to the case where the injection agent accommodating section 7 is to be emptied.

Referring to fig. 23 to 26, a peripheral wall sliding slot extending along the axial direction may be provided on a peripheral wall portion of the needle cylinder 1 behind the movable sealing portion 3, in this case, the manual control portion includes a pressure control slider 21 slidably engaged with the peripheral wall sliding slot of the needle cylinder, the pressure control slider 21 extends out of the needle cylinder 1 through the peripheral wall sliding slot portion of the needle cylinder for user's operation, and the movable sealing portion 3 and the pressure control slider 21 form a front-back elastic connection, for example, a spring 5' is provided between the movable sealing portion 3 and the pressure control slider 21 as shown in the figure. Under the structure, the pressure is further exerted on the pressure control slide block 21 to enable the pressure control slide block to slide forwards along the axial direction of the sliding groove of the circumferential wall of the needle cylinder, so that the movable sealing part 3 and the pressure control slide block 21 can be elastically compressed, and when the position of the pressure control slide block is kept, the movable sealing part 3 can break the stress balance state and continuously move forwards under the action of the resilience force until the externally-discharged injection dose reaches the preset target.

In another embodiment, the medical puncturing device is adapted to effect a metered dose injection of an injection agent. Specifically, referring to fig. 1 to 10, an axial direction limiting portion 1a for limiting the forward movement of the movable sealing portion 3 is disposed in front of the movable sealing portion 3 in the inner cavity of the syringe, and when the medical puncturing device is in the fluid conducting state, the peripheral wall needle hole 6b is disposed in front of the axial direction limiting portion 1a, and the movable sealing portion 3 can move forward under the effect of the resilient force between the movable sealing portion and the pressing portion 2.

To realize that the movable seal part 3 moves to be limited by the axial limiting part 1a, two conditions are adopted:

in the first case, until the movable sealing portion 3 moves to be limited by the axial limiting portion 1a, the pressure of the injection in the injection containing region 7 is still not less than the pressure in the apparent or potential tissue gap, cavity system, or vessel, in other words, at this time, the movable sealing portion 3 can be pushed forward to be limited by the axial limiting portion 1a only by the resilience between the movable sealing portion 3 and the pressing portion 2 without using other driving structures.

The second case is that before the movable sealing part 3 is pushed to abut against the axial limiting part 1a under the effect of the resilience force between the movable sealing part 3 and the pressing part 2, the pressure of the injection in the injection containing area 7 is the same as the pressure in the apparent or potential tissue gap, cavity system and vessel (i.e. the movable sealing part 3 is not moved any more due to the force balance), at this time, the movable sealing part 3 cannot be pushed to be limited by the axial limiting part 1a only by virtue of the resilience force between the movable sealing part 3 and the pressing part 2, so that the movable sealing part 3 needs to be further pushed forward by an additionally arranged driving structure, for example, the driving structure can be the aforementioned manual control part. In either case, the axial stopper 1a provided in the present embodiment is the basis for achieving the injection of a fixed amount of the injection agent.

The following describes a plurality of different puncture and injection timings of the medical puncture device.

In one embodiment, the peripheral wall needle hole 6b is always kept above the injection agent containing area 7 before the hollow puncture needle 6 extends out of the front closed end of the needle cylinder, so that the phenomenon of early leakage at the front end needle hole 6a can be avoided, and the reliability of the medical puncture device can be improved.

In another embodiment, the peripheral needle hole 6b is at least partially in communication with the injection agent containing region 7 when the medical puncturing device is in a superficial tissue puncturing state, i.e., when the hollow puncturing needle 6 extends from the front closed end of the barrel to a length within a superficial tissue puncturing length (or when the front end of the hollow puncturing needle 6 penetrates into superficial tissue but not into the superficial or potential tissue spaces, cavities, or vessels). In other words, before the front end of the hollow puncture needle 6 is inserted into the apparent or potential tissue space, cavity system or vessel, the injection agent containing area 7, the peripheral wall needle hole 6b and the front end needle hole 6a are communicated in advance, so that the injection agent is injected into the needle cavity of the hollow puncture needle 6 in advance, at least a part of air is discharged, and the air quantity entering the apparent or potential tissue space, cavity system or vessel is reduced.

More preferably, when the front end of the hollow puncture needle 6 starts to penetrate into the superficial tissues, the needle hole 6b of the peripheral wall starts to communicate with the injection agent containing area 7, so that when the front end of the hollow puncture needle 6 penetrates into the visible or potential tissue gaps, cavity systems and vessels, the needle cavity of the hollow puncture needle 6 is filled with the injection agent, and the possibility of air entering the visible or potential tissue gaps, cavity systems and vessels is completely eliminated.

In another embodiment, when the medical puncturing device is in a diversion state, that is, when the length of the hollow puncturing needle 6 extending from the front closed end of the syringe is within the diversion length range (or when the front end of the hollow puncturing needle 6 is punctured into a visible or potential tissue space, cavity system or vessel), the peripheral needle hole 6b is already completely positioned in the injection accommodating area 7, so that the flow rate of the peripheral needle hole 6b is maximized, and the injection speed is increased.

The above three embodiments may be implemented individually or in combination.

An embodiment capable of preventing the reverse flow of the fluid to be discharged from the peripheral wall needle hole 6b in the reverse direction will be described.

When the front end needle hole 6a is communicated with the injection accommodating area 7 and the peripheral wall needle hole 6b is still positioned behind the movable sealing part 3, or when the front end needle hole 6a is positioned in a visible or potential tissue gap, cavity system or vessel and the peripheral wall needle hole 6b is still positioned behind the movable sealing part 3, the risk that the injection flows backwards and reversely overflows from the peripheral wall needle hole 6b exists. Therefore, an elastic sheath 4 sleeved outside the hollow puncture needle 6 can be arranged in the elastic pushing component, when the peripheral wall needle hole 6b is positioned at the rear part of the movable sealing part 3 (namely when the peripheral wall needle hole 6b is not communicated with the injection accommodating area 7), the elastic sheath 4 can keep blocking the peripheral wall needle hole 6b, thereby effectively avoiding the backflow and overflow of the injection, preventing the rear area of the movable sealing part 3 from being polluted, reducing the fluid loss and improving the product reliability.

In fact, the elastic sheath 4 can be used only as an elastic connection member between the movable seal portion 3 and the pressing portion 2, even if it is not used for closing the circumferential wall pin hole 6 b. Specifically, by pressing the pressing portion 2 forward, the elastic sheath 4 between the movable seal portion 3 and the pressing portion 2 is pressed, so that a resilient force is formed between the movable seal portion 3 and the pressing portion 2, driving the movable seal portion 3 to move forward. Further, the elastic connection member between the movable seal portion 3 and the pressing portion 2 may be a spring 5 having both ends in the axial direction connecting the movable seal portion 3 and the pressing portion 2, respectively. The spring 5 and the elastic sheath 4 may be provided separately or in combination.

The elastic connection between the movable seal portion 3 and the pressing portion 2 may be achieved by means other than the provision of the elastic connection member. For example, the movable seal portion 3 and the pressing portion 2 may be provided as an integrally molded elastic member.

Various embodiments of the ability to implant medical devices into apparent or potential tissue spaces, systems, vessels by means of a medical puncturing device are described below, respectively, and for ease of understanding, the implanted medical devices are illustrated as being wire-like or tubular implants 11, although implants 11 may also be needle-like implants, electrodes, sensors, etc.

Specifically, an implant guide structure for introducing the implant 11 into the needle chamber of the hollow puncture needle 6 is provided in the medical puncture device.

In one embodiment, referring to fig. 17 to 19, the implant guide structure includes an inclined guide groove 3a formed on the movable seal portion 3 and extending obliquely toward the hollow puncture needle 6. When the injection accommodating area 7, the peripheral wall needle hole 6b and the front end needle hole 6a are communicated, firstly, the injection is ready to be exposed or potential tissue gaps, cavity systems and vessels are expanded, and then the implant 11 is implanted into the expanded exposed or potential tissue gaps, cavity systems and vessels through the inclined guide groove 3a, the peripheral wall needle hole 6b, the needle cavity of the hollow puncture needle 6 and the front end needle hole 6 a.

The inclined guide groove 3a may be a through groove that penetrates in the front-rear direction, or may be a non-through groove formed in the upper surface of the movable seal portion 3.

When the inclined guide groove 3a is a through groove, the implant guide structure may further include a one-way valve assembly 9 which is embedded in the inclined guide groove 3a and can be opened and closed, the one-way valve assembly 9 is in a normally closed state when no external force is applied, so as to prevent the injection in the injection containing area 7 from leaking from the one-way valve assembly, but when an opening force is applied, a plurality of valves thereof can be opened, so that the implant 11 can penetrate from the opening to the circumferential wall needle hole 6 b. Alternatively, the implant guiding structure may include a guiding groove sealing member inserted into the inclined guiding groove 3a, and when the implant 11 is to be implanted, the guiding groove sealing member is firstly pulled out.

When the inclined guide groove 3a is a non-through groove, it may be directly pierced by the implant 11, or after piercing with another piercing member, the implant 11 may be passed through the piercing opening to penetrate the peripheral needle hole 6 b.

In the present embodiment, to match the guide of the inclined guide grooves 3a, the peripheral wall needle hole 6b may be provided as an inclined hole opened toward the obliquely rear direction, so that the peripheral wall needle hole 6b can be aligned with the inclined guide grooves 3a to accurately introduce the implant 11.

In another embodiment, referring to fig. 20 and 21, the implant guiding structure includes an inclined guiding needle hole 6c formed in the peripheral wall of the hollow puncture needle 6 and opened obliquely backward, the inclined guiding needle hole 6c is always kept backward of the movable sealing portion 3 in the fluid guiding state of the medical puncture device, and the implant 11 can penetrate into the needle cavity of the hollow puncture needle 6 through the inclined guiding needle hole 6c and be implanted into the expanded exposed or potential tissue space, cavity system, or vessel through the front end needle hole 6 a.

Similar to the previous embodiment, the implant guiding structure may further comprise a retractable one-way valve assembly 9 inserted into the inclined guiding needle hole 6c or a needle hole sealing member 10 inserted into the inclined guiding needle hole 6c, and the implant 11 can be implanted by first expanding the one-way valve assembly 9 or pulling out the needle hole sealing member 10.

In another embodiment, referring to fig. 22, the implant guide structure includes a center guide groove 2c formed at a center position of the rear end surface of the pressing part 2 and pierced, and the hollow puncture needle 6 is formed with a rear end needle hole which is axially aligned with the center guide groove 2 c. When the implant 11 needs to be implanted, the middle guide groove 2c can be punctured, then the implant 11 is inserted into the needle cavity of the hollow puncture needle 6 through the puncture hole of the middle guide groove 2c and the rear end needle hole of the hollow puncture needle 6, and then the implant can be further implanted into the expanded apparent or potential tissue gaps, cavity systems and vessels through the front end needle hole 6 a.

Several embodiments of medical puncturing devices formed in a split-mount configuration are described below.

In one embodiment, a medical puncturing device includes a puncturing control module and a fluid storage module that are formed separately from each other. The puncture control module comprises a first syringe unit, an elastic pushing assembly and a hollow puncture needle 6, wherein the elastic pushing assembly and the hollow puncture needle are arranged in a barrel cavity of the first syringe unit, and the puncture control module can further comprise an elastic sheath 4, a spring 5 and other components in combination with the different embodiments. And the fluid storage module comprises a second syringe unit, an injection agent receiving area 7 formed in the chamber of the second syringe unit, and a module package removably packaged at the rear end of the second syringe unit. A detachable connection structure is formed between the first syringe unit and the second syringe unit, and the first syringe unit and the second syringe unit are spliced with each other to form the syringe 1. As will be appreciated in connection with the various embodiments described above, the fluid storage module may also include components such as a front seal 8.

Therefore, the puncture control module and the fluid storage module can be respectively produced and then assembled into the medical puncture device. The module package is used to seal the rear end of the injectant receiving area 7 and can be removed when the penetration control module and fluid storage module are assembled.

In another embodiment, a medical puncturing device includes a puncturing control module and a fluid storage module that are formed separately from each other. The puncture control module comprises a first syringe unit, and a pressing part 2 and a hollow puncture needle 6 which are arranged in a barrel cavity of the first syringe unit, and can also comprise an elastic sheath 4, a spring 5 and other components in combination with the different embodiments. And the fluid storage module includes a second syringe unit, an injection agent housing area 7 formed in a chamber of the second syringe unit, and a movable seal 3 sealed at a rear end of the second syringe unit, where the movable seal 3 is for sealing a rear end of the injection agent housing area 7. A detachable connection structure is formed between the first needle cylinder unit and the second needle cylinder unit, the first needle cylinder unit and the second needle cylinder unit are spliced with each other to form a needle cylinder 1, and the movable sealing part 3 and the pressing part 2 are elastically connected in a front-back mode. As will be appreciated in connection with the various embodiments described above, the fluid storage module may also include components such as a front seal 8.

In another embodiment, a medical puncturing device includes a puncturing control module, a transition connection module, and a fluid storage module that are formed separately from one another. The puncture control module comprises a first syringe unit, and a pressing part 2 and a hollow puncture needle 6 which are arranged in a barrel cavity of the first syringe unit, and can also comprise an elastic sheath 4, a spring 5 and other components in combination with the different embodiments. The transitional coupling module comprises a second syringe unit and a movable seal 3 arranged in the chamber of the second syringe unit. The fluid storage module includes a third syringe unit, an injection receiving area 7 formed in a barrel chamber of the third syringe unit, and a module package removably packaged at a rear end of the third syringe unit. The first needle cylinder unit, the second needle cylinder unit and the third needle cylinder unit are sequentially detachably connected, the first needle cylinder unit, the second needle cylinder unit and the third needle cylinder unit are sequentially spliced to form the needle cylinder 1, and the movable sealing part 3 and the pressing part 2 are elastically connected in front and back. As will be appreciated in connection with the various embodiments described above, the fluid storage module may also include components such as a front seal 8.

A second exemplary embodiment of the present invention provides a medical device assembly, referring to fig. 18 and 22, comprising an implant 11 and a medical puncturing device provided with an implant guiding structure as described above, thereby enabling implantation of the implant 11 by the medical puncturing device into the animal's apparent or potential tissue space, cavity system, vasculature (including but not limited to the suprachoroidal space, epidural space, pleural space, peritoneal cavity, joint space, artery, vein). In addition, the medical instrument assembly in the exemplary embodiment obviously has all the technical effects brought by the medical puncturing device, and therefore, the detailed description thereof is omitted.

In one embodiment, the medical instrument assembly further comprises a hollow auxiliary guide needle 12 adapted to be used with the implant guide structure, wherein the needle bore of the auxiliary guide needle 12 is of a size sufficient for the implant 11 to penetrate. When the implantation operation of the implant 11 is performed, the auxiliary guide needle 12 is firstly connected with the implant guide structure, the implant 11 can sequentially pass through the needle cavity of the auxiliary guide needle 12 and the implant guide structure to be guided into the needle cavity of the hollow puncture needle 6, and then the obvious or potential tissue gaps, cavity systems and vessels are implanted through the front end needle hole 6 a.

For example, referring to fig. 18, the implant guide structure includes a through inclined guide groove 3a and a one-way flap assembly 9 fitted into the inclined guide groove 3a and openable and closable, and a peripheral wall needle hole 6b is provided as an inclined hole opening obliquely rearward. When the implant 11 is implanted, the one-way valve assembly 9 is firstly opened by the auxiliary guide needle 12 to penetrate through the inclined guide groove 3a, the front end of the auxiliary guide needle 12 penetrates through the peripheral wall needle hole 6b, and then the implant 11 is implanted into the visible or potential tissue gaps, cavity systems and vessels sequentially through the needle cavity of the auxiliary guide needle 12, the needle cavity of the hollow puncture needle 6 and the front end needle hole 6 a.

In another embodiment, the implant guiding structure comprises an inclined guiding groove 3a penetrating in the front-back direction and a guiding groove sealing member inserted into the inclined guiding groove 3a, and the auxiliary guiding needle 12 can puncture the guiding groove sealing member forward and the front end penetrates into the peripheral wall needle hole 6b, thereby communicating with the needle cavity of the hollow puncture needle 6.

In another embodiment, the inclined guide groove 3a is formed on the upper surface of the movable seal portion 3 and is a non-through groove, and the auxiliary guide needle 12 can penetrate the inclined guide groove 3a forward and the leading end penetrates the peripheral wall needle hole 6b, thereby communicating the needle chamber of the hollow puncture needle 6.

The peripheral wall needle hole 6b in the above embodiment may be formed as an inclined hole opened toward the obliquely rear direction so that the leading end of the auxiliary guide needle 12 can be aligned with the inclined hole when the auxiliary guide needle 12 passes through the inclined guide groove 3 a.

In another embodiment, the implant guiding structure comprises an inclined guiding needle hole 6c formed in the peripheral wall of the hollow puncture needle 6 and opening towards the inclined rear, in the flow guiding state of the medical puncture device, the inclined guiding needle hole 6c is positioned at the rear of the movable sealing part 3, and the auxiliary guiding needle 12 can extend into the inner cavity of the syringe from the rear opening end of the syringe and penetrate into the inclined guiding needle hole 6c, so as to communicate with the needle cavity of the hollow puncture needle 6.

Further, the implant guiding structure may further comprise a one-way valve assembly 9 inserted into the inclined guiding needle hole 6c and opened or closed or a needle hole sealing member 10 inserted into the inclined guiding needle hole 6c, so that the auxiliary guiding needle 12 can forwardly open the one-way valve assembly 9 or forwardly puncture the needle hole sealing member 10, thereby communicating with the needle cavity of the hollow puncture needle 6.

Alternatively, referring to fig. 22, the implant guide structure includes a central guide groove 2c, and the hollow puncture needle 6 is formed with a rear end needle hole which is axially aligned with the central guide groove 2 c. When the implant 11 is implanted, the auxiliary guide needle 12 is firstly utilized to puncture the middle guide groove 2c, so that the auxiliary guide needle 12 is axially aligned with the rear end needle hole of the hollow puncture needle 6, then the implant 11 passes through the needle cavity of the auxiliary guide needle 12 and the rear end needle hole of the hollow puncture needle 6 in sequence to penetrate into the needle cavity of the hollow puncture needle 6, and then the obvious or potential tissue gaps, cavity systems and vessels are implanted through the front end needle hole 6 a.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the foregoing embodiments, various features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in further detail in the embodiments of the present invention.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.

Claims (21)

1. A medical puncturing device, comprising:

the syringe (1) comprises a front closed end of the syringe and a rear open end of the syringe;

the elastic pushing component comprises a pressing part (2) and a pierceable movable sealing part (3) which is positioned in the inner cavity of the needle cylinder and can be elastically connected with the pressing part (2) in a front-back manner;

a hollow puncture needle (6) fixedly connected to the pressing part (2) and formed with a front end needle hole (6a) and a peripheral wall needle hole (6 b); and

at least one injection containing area (7) formed in the inner cavity area of the syringe surrounded by the front closed end of the syringe, the peripheral wall of the inner cavity of the syringe and the movable sealing part (3);

the medical puncture device is arranged to push the hollow puncture needle (6) forwards to puncture the front closed end of the needle cylinder and enable the injection accommodating area (7), the peripheral wall needle hole (6b) and the front end needle hole (6a) to be communicated by pressing the pressing part (2).

2. The medical puncturing device according to claim 1, comprising a flow guiding state in which the injection agent housing area (7), the peripheral wall needle hole (6b) and the front end needle hole (6a) are communicated, wherein the movable sealing portion (3) is movable forward to close off the peripheral wall needle hole (6b) by a resilient force between the movable sealing portion and the pressing portion (2).

3. A medical puncturing device according to claim 2, wherein in said conducting state, said movable sealing part (3) blocks said needle hole (6b) when moving forward to abut against the front closed end of said barrel.

4. The medical puncturing device according to claim 1, wherein an axial stopper (1a) is provided in the needle cylinder chamber in front of the movable seal (3) for stopping the movable seal (3) from moving forward, and the medical puncturing device comprises a flow guiding state in which the injection receiving area (7), the peripheral wall needle hole (6b) and the front end needle hole (6a) are communicated, and in the flow guiding state, the peripheral wall needle hole (6b) is in front of the axial stopper (1a), and the movable seal (3) can move forward under the effect of a resilient force between the movable seal and the pressing portion (2).

5. A medical puncturing device according to claim 1, wherein the medical puncturing device comprises a manual control part connected to the movable sealing part (3) and partly protruding out of the syringe.

6. A medical puncturing device according to claim 5, wherein the movable sealing part (3) and the manual control part form a front and rear elastic connection.

7. The medical puncturing device according to claim 6, wherein the needle cylinder (1) is formed with a sliding groove extending in an axial direction in a circumferential wall portion located behind the movable sealing portion (3), the manual control portion comprises a pressurizing control slider slidably engaged with the sliding groove, and the movable sealing portion (3) and the pressurizing control slider are elastically connected in a front-rear direction.

8. The medical puncturing device according to claim 1, wherein the medical puncturing device comprises a superficial tissue puncturing state and a flow guiding state after the hollow puncturing needle (6) punctures the front closed end of the syringe, and the length range of the hollow puncturing needle (6) extending out of the front closed end of the syringe in the superficial tissue puncturing state and the flow guiding state is a superficial tissue puncturing length range and a flow guiding length range respectively;

wherein the peripheral wall needle hole (6b) is kept above the injection accommodation area (7) before the hollow puncture needle (6) is extended from the front closed end of the needle cylinder;

and/or, when the length of the hollow puncture needle (6) extending from the front closed end of the needle cylinder is within the range of the surface tissue puncture length, the peripheral wall needle hole (6b) is at least partially communicated with the injection accommodating area (7);

and/or when the length of the hollow puncture needle (6) extending from the front closed end of the needle cylinder is within the diversion length range, the peripheral wall needle hole (6b) is positioned in the injection accommodating area (7).

9. A medical puncturing device according to claim 1, wherein the medical puncturing device comprises at least one axially slidable pierceable isolating seal (13) arranged in the area of the syringe cavity between the movable seal (3) and the front closed end of the syringe, and the injection agent accommodating area (7) is formed with a plurality of axially isolatable isolating seals (13).

10. The medical puncturing device according to claim 1, further comprising an implant guide for introducing an implant (11) into the needle lumen of the hollow puncturing needle (6).

11. The medical puncturing device according to claim 10, wherein the implant guiding structure comprises an inclined guide groove (3a) formed on the movable sealing portion (3) and extending obliquely toward the hollow puncturing needle (6).

12. The medical puncturing device according to claim 11, wherein said inclined guide groove (3a) is formed through in a front-rear direction, and said implant guiding structure further comprises a one-way flap assembly (9) inserted into said inclined guide groove (3a) and opened and closed or a guide groove sealing member inserted into said inclined guide groove (3 a).

13. The medical puncturing device according to claim 11, wherein the inclined guide groove (3a) is a non-through groove formed in an upper surface of the movable sealing portion (3).

14. The medical puncturing device according to claim 11, wherein the peripheral wall needle hole (6b) is formed as an inclined hole opening obliquely rearward.

15. The medical puncturing device according to claim 10, wherein the implant guiding structure comprises an inclined guide needle hole (6c) formed in a peripheral wall of the hollow puncturing needle (6) and opened obliquely rearward, and the medical puncturing device comprises a flow guiding state in which the injection agent housing section (7), the peripheral wall needle hole (6b) and the front end needle hole (6a) are communicated, and in the flow guiding state, the inclined guide needle hole (6c) is located rearward of the movable sealing section (3).

16. The medical puncturing device according to claim 15, wherein the implant guide structure further comprises a one-way valve assembly (9) inserted into the slanted guide needle hole (6c) and opened and closed or a needle hole sealing member (10) inserted into the slanted guide needle hole (6 c).

17. The medical puncturing device according to claim 10, wherein the implant guide structure comprises a center guide groove (2c) formed at a center position of a rear end surface of the pressing portion (2) and adapted to be pierced, and the hollow puncturing needle (6) is formed with a rear end needle hole axially aligned with the center guide groove (2 c).

18. The medical puncturing device of any one of claims 1 to 17, wherein the medical puncturing device comprises a puncturing control module and a fluid storage module that are formed separately from each other;

wherein the puncture control module comprises a first syringe unit, and the elastic pushing assembly and the hollow puncture needle (6) which are arranged in a barrel cavity of the first syringe unit;

the fluid storage module comprising a second syringe unit, the injection receiving area (7) formed within a barrel cavity of the second syringe unit, and a module enclosure removably enclosed at a rear end of the second syringe unit;

a detachable connection structure is formed between the first syringe unit and the second syringe unit.

19. The medical puncturing device of any one of claims 1 to 17, wherein the medical puncturing device comprises a puncturing control module and a fluid storage module that are formed separately from each other;

wherein the puncture control module comprises a first syringe unit, and the pressing part (2) and the hollow puncture needle (6) which are arranged in the syringe cavity of the first syringe unit;

the fluid storage module comprising a second syringe unit, the injection receiving area (7) formed within a barrel cavity of the second syringe unit, and the movable seal (3) encapsulated at a rear end of the second syringe unit;

a detachable connection structure is formed between the first syringe unit and the second syringe unit.

20. The medical puncturing device of any one of claims 1 to 17, wherein the medical puncturing device comprises a puncturing control module, a transition connection module and a fluid storage module which are formed separately from each other;

wherein the puncture control module comprises a first syringe unit, and the pressing part (2) and the hollow puncture needle (6) which are arranged in the syringe cavity of the first syringe unit;

the transition connection module comprises a second syringe unit and the movable sealing part (3) arranged in a barrel cavity of the second syringe unit;

the fluid storage module comprises a third syringe unit, the injection receiving area (7) formed within a barrel cavity of the third syringe unit, and a module enclosure removably enclosed at a rear end of the third syringe unit;

the first syringe unit, the second syringe unit and the third syringe unit are detachably connected in sequence.

21. A medical instrument assembly, characterized in that it comprises an implant (11) and a medical puncturing device according to any one of claims 10 to 17.

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