CN110338858B

CN110338858B - Composite traction device

Info

Publication number: CN110338858B
Application number: CN201810285518.2A
Authority: CN
Inventors: 张智超; 郑璇珠; 张传海
Original assignee: Shanghai Keci Medical Technology Co ltd
Current assignee: Shanghai Keci Medical Technology Co ltd
Priority date: 2018-04-02
Filing date: 2018-04-02
Publication date: 2022-08-16
Anticipated expiration: 2038-04-02
Also published as: CN110338858A

Abstract

The invention relates to a composite traction device with both mechanical and balloon traction. The invention provides a composite pulling device, comprising: mechanical pulling device, handle, pipe, sacculus, wherein: the handle is used for controlling the mechanical traction device to carry out mechanical traction; the catheter is used for filling and discharging fluid into the saccule; the balloon can realize bending traction after being filled with fluid. The invention is more perfect and suitable for the actual situation of human surgery and combines the advantages of balloon expansion and mechanical retraction.

Description

Composite traction device

Technical Field

The invention relates to the field of medical instruments, in particular to a composite traction device with both mechanical and balloon traction functions.

Background

Retractors (also called as draw hooks) are used to retract tissue, expose the area to be operated, and are convenient for exploration and operation, and can be divided into two types, namely hand-held draw hooks and automatic draw hooks. The retractor has various specifications of different shapes and sizes, and can be selected according to the operation requirement.

Conventional retractors require a large operating space, which requires a large surgical incision. Meanwhile, the traditional retractor is made of metal, and is provided with a sharp end, so that secondary wound of a patient is easily caused, and important organ tissues are damaged.

The catheter retractor is used for tissue retraction in operation, and the product completes the retraction operation through natural orifice intervention or open surgical intervention. The surgery includes, but is not limited to, various laparoscopic surgery, cardiovascular surgery, brain surgery, digestive tract surgery, urinary disease surgery, etc., and the retracted tissue includes, but is not limited to, gastrointestinal tract, esophagus, airway, urethra, vagina, bladder, etc. Retraction purposes include, but are not limited to, protecting specific tissues, removing specific tissues to facilitate surgical procedures.

To overcome the drawbacks of mechanical pulling devices, balloon pulling devices have recently begun to be used in similar procedures. The balloon traction device has a brand new traction principle and device structure different from a mechanical traction device. It uses the feature that a balloon device, filled with a fluid, usually a liquid or a gas, expands to occupy space, separating and spacing the body organs or tissues, thereby achieving a traction effect.

The use of balloon inflation to create gaps between tissues is an advantage over metal retractors in that they are small enough to be placed in the body tissue portions to be isolated without unduly damaging the body tissue. Meanwhile, the expansion surface of the saccule is smooth and soft, and the human tissue is not easy to be damaged. For example, chinese patent 200580028684.5 provides a tissue removal/separation device. The device includes a balloon that is inflatable between a first tissue and a second tissue of the body. The balloon has an inflated shape selected to enable removal or separation of the first tissue from the second tissue in a manner suitable for protecting the first tissue from the application of therapy to the second tissue.

This places high demands on the balloon material and degree of curvature, and retraction distance requirements for a particular procedure can only be met by performing precise calculations and tests on the balloon material. This brings difficulty to the preparation of the balloon and puts high technical requirements. In some particular procedures, the degree of curvature of a single balloon may not achieve the retraction distance required for the procedure.

This invention, however, only discloses the possibility of isolating human tissue by balloon inflation, and an original fluid-filled balloon is not suitable for use in any human tissue for inflation isolation. Even inflating the body with such balloons to some extent poses significant potential risks. And the balloon will cling to human tissue under certain fluid pressure, although it can isolate different tissues but also tightly pack the limited space between them making the surgery more difficult, the balloon also has the risk of bursting if passing through sharp surgical instruments and burning surgical means. Therefore, the balloon expansion device is different from a mechanical traction device, can not effectively realize large-displacement retraction and does not occupy the operation space, and only can play a role in isolating human tissues. In addition, it is difficult to determine the specific position of the balloon from outside the body, and generally, such a procedure is quite precise. Meanwhile, the accumulated liquid in the body is difficult to eliminate and causes new risks.

Thus, there is a need for a surgical device utilizing a balloon as a retractor that is more sophisticated and adaptable to the actual conditions of a human procedure to combine the advantages of both balloon inflation and mechanical retraction.

Disclosure of Invention

The invention aims to provide a bending air bag for completing retraction operation of natural orifice intervention or open type operation intervention based on the problems, and solves the problems that the conventional catheter retractor is complex in structure, inconvenient to operate, large in product diameter, incapable of passing through narrow and complex-structured orifices, incapable of accurately controlling the traction force, low in reliability and the like, so that simple and reliable catheter retraction is realized.

In order to achieve the above object, the present invention provides a composite pulling apparatus comprising: mechanical pulling device, handle, pipe, sacculus, wherein: the handle is used for controlling the mechanical traction device to carry out mechanical traction; the catheter is hollow and provided with one or more radial through holes for filling and discharging fluid into the saccule; the balloon can realize bending traction after being filled with fluid; the mechanical traction device is a filament which is respectively fixed on the handle and the end part of the balloon far away from the handle or the end part of the whole composite traction device far away from the handle, and the filament is tensioned by operating the handle, so that the composite traction device is bent; the mechanical traction device is arranged inside the guide pipe; the mechanical traction device is used for pre-bending, and the pre-bending can determine the direction before the balloon is inflated; the balloon is filled with fluid to realize accurate deformation traction.

The composite traction device further comprises a sheath tube coated at one end, close to the handle, of the outer portion of the catheter, a gap is formed between the sheath tube and the catheter and can move relatively, and a locking pin is arranged on the sheath tube and used for locking the relative position of the catheter and the sheath tube. Lubricating liquid can be filled in a gap between the sheath tube and the catheter. And oil seals are arranged between the two ends of the sheath tube and the guide tube and used for sealing a gap between the guide tube and the sheath tube. The sheath further comprises an external fixation means for fixation of the entire sheath relative to the patient.

One through hole is internally provided with a pulling wire. The plurality of radial through holes can be used for placing a developing device, or can be used for placing a temperature detection device, or is used for draining saliva, or is used for arranging a negative pressure device. The part, which is not coated by the sheath tube, of one end, far away from the handle, of the catheter is provided with a balloon, the balloon is coated outside the catheter, and the through hole, used for filling and discharging fluid to the balloon, of the catheter is communicated with the balloon through the catheter. The portion of the catheter covered by the balloon is more flexible than the other catheter portions.

The handle has a dial that engages the catheter so that movement or rotation of the catheter can be fed back to the dial in real time.

The mechanical traction device can also be a bendable memory metal wire, the whole memory metal wire is arranged in the catheter, two ends of the memory metal wire are respectively fixed near two ends of the saccule, after the device enters a human body, the temperature changes, and the memory metal wire is naturally bent to drive the whole composite traction device to be bent.

The invention has the advantages that the advantages of two traction modes are complementary, the mechanical traction is used for pre-bending, and the pre-bending can determine the direction before the saccule is filled. In addition, mechanical traction may prevent the balloon from acting as a protection in the event of failure. And the balloon traction mode can realize safer and more precise traction, thereby ensuring the safety of patients.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural view of the composite pulling apparatus of the present invention;

FIG. 2 is a cross-sectional view of a composite puller catheter of the present invention;

FIG. 3 is a schematic structural view of a sheath portion of the composite pulling apparatus of the present invention;

FIG. 4 is a schematic view of the handle portion of the compound pulling apparatus of the present invention;

FIG. 5 is a schematic structural view of the mechanical pulling unit of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at B;

fig. 7 is a partial enlarged view of fig. 5 at C.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, fig. 1 is a schematic structural diagram of the composite pulling device of the present invention. According to fig. 1, the composite pulling device of the present invention comprises a handle 1, a sheath 2, a catheter 3, a balloon 4, and a mechanical pulling device disposed inside the catheter 3, which is defined as a proximal end near the handle 1 and a distal end on the other side. Wherein the handle 1 is used for controlling the mechanical traction device to carry out mechanical traction. The catheter 3 is used for inflating and deflating the balloon 4 with fluid to realize the bending and drawing of the balloon 4.

The sheath pipe 2 is coated outside the guide pipe 3, and a gap is formed between the sheath pipe 2 and the guide pipe 3 and used for filling lubricating liquid. The catheter 3 is hollow and provided with one or more radial through holes 5, a traction wire is arranged in the through holes 5, and the through holes 5 are also used for filling and discharging fluid to the saccule. The sheath tube 2 only covers the proximal part of the catheter 3, the part of the distal end of the catheter 3 which is not covered by the sheath tube 2 is provided with a balloon 4, the balloon 4 is covered outside the catheter 3, and the through hole 5 of the catheter 3 for filling and discharging fluid to the balloon 4 is communicated with the balloon 4 through the catheter 3.

The proximal end of the catheter 3 is a Y-shaped hollow tube which is responsible for fluid charging and discharging of the saccule 4 and routing of a built-in mechanical traction device. The handle 1 is directly connected with a traction lead. The sheath 2 is wrapped around the proximal catheter 3 adjacent to the handle 1. The balloon 4 is wrapped outside the distal catheter 3, wherein the portion of the catheter 3 wrapped by the balloon 4 is more flexible than the other portions of the catheter 3.

Referring to fig. 2, fig. 2 is a cross-sectional view of the composite pulling device catheter of the present invention. In one embodiment, the catheter 3 has a plurality of radial through holes 5, one of the through holes 5 is used for fluid charging and discharging of the balloon 4, and the other through holes 5 can be used for fluid charging and discharging of the balloon 4, or can be used for placing a mechanical pulling unit, or can be used for placing a developing device, or can be used for placing a temperature detection device, or is used for draining saliva, or is used for placing a negative pressure device. The developing device can be inserted with a developing guide wire, the cavity wall can be coated with a developing coating, the cavity wall can be filled with developing solution, and the through hole 5 can be provided with a channel for spraying the developing solution onto the natural cavity wall. The temperature detection device can be a temperature probe and can be a thermosensitive paster and is used for reflecting the temperature condition in the natural cavity in real time.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a sheath portion of the composite pulling device of the present invention. In fig. 3, oil seals 6 are provided between both ends of the sheath tube 2 and the guide tube 3 for sealing a gap between the guide tube 3 and the sheath tube 2 and adding a lubricating liquid to the gap. The lubricating device has several expression forms, one is used for sealing lubricating liquid possibly existing in the sheath pipe 2, the outer ring of the oil seal 6 is fixed on the oil seal 6, and the inner ring of the oil seal 6 is attached to the guide pipe 2 but generates almost no friction force. The oil filling port 7 is used for filling lubricating liquid. The lubricating liquid should be an edible liquid intended to provide lubrication between the sheath 2 and the catheter 3. Another expression of the lubricating device is that the inner wall of the sheath tube 2 and the outer wall of the guide tube 3 are respectively coated with a lubricating coating to form lubrication.

The sheath 2 in fig. 3 also contains external fixation means. The sheath 2, the catheter 3 and the balloon 4 can rotate around the main shaft. The external fixation device is intended to fix the entire sheath relative to the patient, and one expression is a headgear that allows the sheath to be fixed relative to the patient's head.

The sheath 2 in fig. 3 also comprises a locking pin 8. The locking pin 8 has the main function of allowing the composite pulling apparatus of the present invention to be secured in a certain position after reaching that position, without external twisting disturbing the position of the entire apparatus. One manifestation of this locking pin 8 is a set screw. Another manifestation of this locking pin 8 is a self-locking structure of a knob or button. The sheath 2 should be fixed relative to the catheter 3 so as not to slide when the locking pin 8 is in the locked state.

Referring to fig. 4, fig. 4 is a schematic structural view of a handle portion of the composite pulling device of the present invention. Wherein, one disc of the handle 1 is a knob, and a shell 11 for scaling the handle 1 is arranged on the disc. The drive shaft 10 in the handle 1 is connected to (fitted to) the catheter 3, and the handle case 11 is fitted to the sheath 2. The driving shaft 10 and the handle shell 11 in the handle are lubricated by a bearing (or lubricated in other forms), the handle 1 is internally provided with three through holes 5, one hollow through hole is used for injecting a charging and discharging fluid into the saccule 4, and the other through holes 5 on the periphery (not on the main shaft) can be used for a walking mechanical pulling unit, or can be used for placing a developing device, or can be used for placing a temperature detection device, or is used for draining saliva, or is used for placing a negative pressure device.

The key to realizing the combined application of the mechanical traction and the balloon traction is the position adjustment. Therefore, the invention also comprises a device position adjusting unit for adjusting the position and relative angle of the device relative to the natural cavity, connecting each fluid charging and discharging hole 5 with an external charging and discharging source and controlling, a knob with scales or other expressions, such as a rocker, a button with a knob or a push button structure which is embedded with a conduit, aiming at feeding back to the whole device in real time when the structure moves and feeding back to the dial in real time when the device moves or rotates. In addition, there is a zero button, the main function of which is to align the dial zero point with the current button when the device reaches the desired position.

Referring to fig. 5, fig. 5 is a schematic structural diagram of the mechanical pulling unit of the present invention. In fig. 5, one expression of the mechanical pulling unit is a wire 12 or nylon wire fixed to the distal portions of the handle 1 and the balloon 4, respectively, or the entire device, and by manipulating the handle 1, the wire 12 is tensioned, thereby bending the balloon 4 portion in the absence of inflation. Another manifestation of the mechanical pulling element is a bendable memory wire 12, such as nitinol. The memory metal can deform and bend automatically under the influence of human body temperature. The whole memory metal strip is arranged in the catheter 3, one end of the memory metal strip is fixed near the near end of the bending saccule, the other end of the memory metal strip is fixed near the far end of the saccule 4, after the device enters a human body, the temperature changes, and the metal wire 12 naturally bends to drive the whole device to bend. The effect of the mechanical pulling is a pre-bending, which may be oriented prior to filling the balloon. In addition, mechanical traction may prevent the balloon from acting as a protection in the event of failure.

The mechanical pulling unit comprises one or more knobs or push buttons, both of which are connected to the mechanical structure. One expression of the knob is a string-pulling mechanism in which, by movement of the push button and the knob, the corresponding string is pulled to drive the corresponding mechanical pulling unit.

Referring to fig. 6 and 7, fig. 6 and 7 are enlarged views of the parts marked B and C in fig. 5, respectively. The points of attachment and mutual positional relationship of the ends of the wire 12 to the catheter 2 are more clearly shown in figures 6 and 7.

While embodiments of the invention have been disclosed above, it is not intended that they be limited to the applications set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept defined by the claims and their equivalents.

Claims

1. Composite draw-off gear, its characterized in that includes: mechanical pulling device, handle, pipe, sacculus, wherein:

the handle is used for controlling the mechanical traction device to carry out mechanical traction;

the catheter is hollow and provided with one or more radial through holes for filling and discharging fluid into the saccule;

the balloon can realize bending traction after being filled with fluid;

the mechanical traction device is a filament which is respectively fixed on the handle and the end part of the balloon far away from the handle or the end part of the whole composite traction device far away from the handle, and the filament is tensioned by operating the handle, so that the composite traction device is bent; the mechanical traction device is arranged inside the guide pipe;

the mechanical traction device is used for pre-bending, and the pre-bending can determine the direction before the balloon is inflated; the balloon is filled with fluid to realize accurate deformation traction.

2. The composite pulling device as defined in claim 1, further comprising a sheath covering the outer portion of the catheter and disposed near the handle, wherein the sheath and the catheter have a gap therebetween for relative movement, and the sheath is provided with a locking pin for locking the relative positions of the catheter and the sheath.

3. The composite pulling apparatus as defined in claim 2, wherein the sheath and the guide tube have a gap therebetween, and a lubricant liquid is filled in the gap.

4. The composite pulling apparatus as defined in claim 2, wherein oil seals are provided between the two ends of the sheath and the conduit for sealing the gap between the conduit and the sheath.

5. The composite pulling apparatus as defined in claim 2, wherein the sheath further comprises an external fixation means for fixing the entire sheath relative to the patient.

6. The composite pulling apparatus as defined in claim 1, wherein the pulling wire is disposed in one of the through holes inside the conduit.

7. Composite pulling device according to claim 1, wherein the plurality of radial through holes can be used either for placing a visualization device, or for placing a temperature detection device, or for draining saliva, or for placing a negative pressure device.

8. The composite traction device as claimed in claim 1, wherein a balloon is disposed on a portion of the end of the catheter away from the handle, which is not covered by the sheath, the balloon is covered outside the catheter, and the through hole of the catheter for filling and discharging fluid into and from the balloon is communicated with the balloon through the catheter.

9. The composite pulling apparatus of claim 8, wherein the portion of the catheter covered by the balloon is more flexible than other portions of the catheter.

10. The composite pulling apparatus as defined in claim 1, wherein the handle has a dial for engaging with the catheter, and the real-time feedback to the dial is provided when the catheter is moved or rotated.

11. The composite traction device as defined in claim 1, wherein the mechanical traction device is a bendable memory wire, the memory wire is disposed in the catheter in a whole piece, and both ends of the memory wire are fixed near both ends of the balloon, respectively, so that after the device is introduced into the human body, the temperature changes, and the memory wire is bent naturally to drive the bending of the whole composite traction device.