CN112933345A

CN112933345A - Anesthetic liquid injection device

Info

Publication number: CN112933345A
Application number: CN201911288979.6A
Authority: CN
Inventors: 不公告发明人
Original assignee: Chongqing Haode Translation Information Technology Co ltd
Current assignee: Chongqing Haode Translation Information Technology Co ltd
Priority date: 2019-12-11
Filing date: 2019-12-11
Publication date: 2021-06-11

Abstract

The invention relates to an anesthetic liquid medicine injection device, which comprises a first barrel, a second barrel and a syringe needle, wherein the first barrel is used for storing anesthetic liquid medicine and can be communicated with the syringe needle; the piston is used for pushing the anesthetic liquid medicine in the first cylinder to the injection needle head under the condition of thrust; the injection device comprises a second cylinder for mixing liquid medicines with different components, and the second cylinder can be communicated with the liquid medicine conveying part; wherein, first barrel can arrange the liquid medicine of different components to the second barrel through the piston, is provided with in the second barrel and can promotes the piston again and produce the mixed portion of annotating that is used for producing the anesthesia liquid medicine propelling movement to the injection needle's of first barrel thrust when mixing the liquid medicine of different components and annotate. The invention can further mix the anesthetic liquid medicine in the injection process of the anesthetic liquid medicine, thereby effectively ensuring the uniform distribution of all components.

Description

Anesthetic liquid injection device

Technical Field

The utility model belongs to the technical field of anesthesia technique and specifically relates to a can adjust anesthetic liquid medicine injection device of mixed concentration and injection speed simultaneously.

Background

Anesthesiology (anesthesiology) is a science that applies basic theory, clinical knowledge and technology about anesthesia to eliminate pain of a recipient operation, ensure the recipient safety and create good conditions for the operation. The compatibility of the anesthetic liquid can directly relate to the anesthetic effect. Prior to surgery, medical personnel anesthetize a subject, often by injecting anesthetic solution using an anesthetic device.

For example, chinese patent publication No. CN206792755U discloses a novel anesthetic injection device. The device includes the syringe needle, the syringe, the plug, the push rod, a handle, promote step motor, starting switch, the device host computer, a controller, the dose sets up the knob, the advancing speed sets up the knob, master switch, display and rhythm of the heart detector, the syringe needle sets up the head at the syringe, the handle sets up the afterbody at the syringe, be provided with the liquid measure check on the syringe, the plug sets up middle part in the syringe, it sets up in the handle to promote step motor, push rod one end is connected the other end with promoting step motor and is connected with the plug, starting switch sets up on the handle, the device host computer is placed by the syringe, the controller sets up in the device host computer. The novel anesthesia injection device is simple in structure and convenient to operate, and better helps medical staff to perform anesthesia work. The time for injecting the anesthetic liquid medicine is effectively mastered, the comfort of the patient is improved, and the anesthetic effect is well guaranteed. And the quantity of the anesthetic liquid medicine is accurately controlled, so that the physical and psychological health of the patient is well guaranteed, and the smooth operation is also guaranteed. The technical problem to be solved by the invention is how to control the injection amount.

For example, chinese patent publication No. CN102355913B discloses a system for controlling a device for injecting anesthetic or sedative drugs to induce anesthesia or sedation. The system comprises means for acquiring signals representative of the patient's brain waves, means for analysing the signals to derive therefrom an anaesthesia depth signal, means for monitoring the value of this anaesthesia depth signal and for developing over time, these means are connected to means for calculating control commands for the injection means in order to automatically bring the signal of the depth of anaesthesia below a predetermined value for at least one predetermined period of time, the device for injecting anesthetic comprises a first device for injecting hypnotic and a second device for injecting morphine-like drug, the means for calculating the control commands for the injection device comprise means allowing the operator to input the anesthesia induction type, the type is selected from the group of induction types differing in initial concentration of the hypnotic agent, and the means for inputting the induction type comprise means for determining an initial concentration of the hypnotic agent associated with a predetermined initial concentration of the morphine-like drug, according to the selected induction type. The technical problem to be solved by the invention is how to control the mixing concentration or the injection speed of the anesthetic liquid medicine according to the actual condition of a patient.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an anesthetic liquid injection device, which comprises: the first barrel is used for storing anesthetic liquid medicine and can be communicated with the injection needle; the piston is used for pushing the anesthetic liquid medicine in the first cylinder to the injection needle under the condition of thrust; the anesthesia monitoring center can generate a signal for adjusting the thrust so as to adjust the injection speed of at least one mixed injection part, and can act on the piston to generate the thrust; the injection device comprises a second cylinder body which can be communicated with the liquid medicine conveying part; the at least one mixing and injecting part can mix the liquid medicine in the second barrel body at a fixed rotation speed or a variable rotation speed under the condition that the mixed liquid medicine of different components in the first barrel body is pushed to the injection needle at the fixed injection speed or the variable injection speed through the piston in response to an adjusting signal of the anesthesia monitoring center. Compared with the prior art, the invention has at least the following advantages by the arrangement: 1. the anesthetic liquid medicine can be further mixed in the injection process of the anesthetic liquid medicine, so that the uniform distribution of all components is effectively ensured; 2. the injection speed can be adjusted under the condition of ensuring uniform mixing according to the anesthesia condition of the receptor so as to meet the requirement of further anesthesia of the receptor under different anesthesia states and ensure the life safety of the receptor in cooperation with doctors; 3. the anesthetic liquid medicine can be mixed according to the anesthetic concentration required by the receptor in different periods during the operation under the condition of ensuring the injection speed so as to meet the anesthetic requirements in different periods during the operation.

According to a preferred embodiment, the injection device comprises at least two mixing sections that can be rotated independently of one another, so that at least one mixing section can push the piston in rotation.

According to a preferred embodiment, the rotational speed and the thrust speed of the mixing and injection part can be adjusted by the respective stepping motor in the case of an adjustment signal from an anesthesia monitoring center.

According to a preferred embodiment, the outer wall of the second cylinder is provided with a heating element, and the thermal conductivity of the first cylinder is smaller than that of the second cylinder, so that the anesthetic liquid medicine can be injected into a receptor within a reasonable temperature range.

According to a preferred embodiment, the second cylinder is provided with different screw connectors for cooperating with screws in different co-injection parts, so that at least one co-injection part can push the piston after the rotation speed is adjusted, thereby changing the pushing force, and the other co-injection parts can only be used for mixing anesthetic liquid medicines with different components after the rotation speed is adjusted. In this way, the invention has at least the following advantages:

according to a preferred embodiment, the second cylinder is provided with a damping portion capable of abutting the piston against the screw without rotation of the co-injection portion. In this way, the invention has at least the following advantages:

according to a preferred embodiment, a check valve group is built in the piston, so that the anesthetic liquid in the first cylinder is reversely discharged to the second cylinder differently.

According to a preferred embodiment, a portion of the screw rod which can extend to the outside of the second cylinder is provided with a liquid medicine port for delivering liquid medicine to the second cylinder; the liquid medicine inlet can be communicated with the liquid medicine conveying part.

According to a preferred embodiment, the screw is provided with a through hole and a blade with a notch at the position where the screw is arranged in the second cylinder; the blade includes blade base plate and blade installation section, the blade base plate with the mode setting of blade installation section with the integral type, the blade base plate is provided with at least one the incision, the blade installation section is connected with the screw rod.

According to a preferred embodiment, the outlet end of the first barrel is detachably connected to one end of the needle base; a microporous filtering filter element with the filtering precision of 5-10 microns is arranged in one end of the needle head seat and used for preventing solid particles from entering a receptor body; the microporous filter element comprises a filter framework and a filter screen attached to the filter framework; the filtering framework of the microporous filtering filter element is connected with the liquid outlet of the first cylinder in a detachable mode. Because screw rod and screw rod interface rotate the in-process, the looks mutual friction, produce the micro-particle such as mole easily, be provided with the millipore filtration filter core, filter the micro-particle in the narcotic, can prevent the jam of syringe needle, more can prevent that solid particle from getting into the injury that the human body caused.

Drawings

FIG. 1 is a schematic view of an anesthetic liquid injection device according to the present invention;

FIG. 2 is a preferred schematic view of an injection cylinder of an anesthetic liquid medicine injection apparatus provided by the present invention;

FIG. 3 is a schematic view showing a preferred structure of a piston of an anesthetic liquid medicine injection device provided by the present invention;

FIG. 4 is a schematic flow chart of a preferred anesthetic liquid delivery of the present invention; and

fig. 5 is a control schematic of a preferred embodiment of the present invention.

List of reference numerals

1: first barrel 11: blade

2: piston 12: first check valve group

3: second cylinder 13: needle seat

4: the knob 14: second check valve set

5: screw 15: needle head

6: a liquid medicine tank 16: liquid medicine inlet

7: the liquid medicine pipe 17: liquid outlet

8: the metering pump 18: microporous filter element

9: the anesthesia monitoring center 19: stepping motor

10: heating member 31: screw rod interface

20: input terminal

Detailed Description

This is described in detail below with reference to fig. 1-5.

Example 1

Anesthetic liquids which can be used for anesthetizing a subject have different components and therefore need to be mixed. The present embodiment discloses an anesthetic liquid injection device, which has at least the following advantages compared with the prior art: 1. the anesthetic liquid medicine can be further mixed in the injection process of the anesthetic liquid medicine, so that the uniform distribution of all components is effectively ensured; 2. the injection speed can be adjusted under the condition of ensuring uniform mixing according to the anesthesia condition of the receptor so as to meet the requirement of further anesthesia of the receptor under different anesthesia states and ensure the life safety of the receptor in cooperation with doctors; 3. the anesthetic liquid medicine can be mixed according to the anesthetic concentration required by the receptor in different periods during the operation under the condition of ensuring the injection speed so as to meet the anesthetic requirements in different periods during the operation.

In the present invention, the recipient mainly refers to animals having vital characteristics, such as human, pig, cat, monkey, dog, and the like.

Specifically, the present embodiment discloses an anesthetic liquid medicine injection device, as shown in fig. 1. It comprises a first cylinder 1 and a piston 2.

A first cylinder 1 for storing an anesthetic liquid medicine and capable of communicating with an injection needle 15.

The piston 2 is used for pushing the anesthetic liquid in the first cylinder 1 to the injection needle 15 under the condition of receiving pushing force.

And the anesthesia monitoring center 9 is used for generating a signal for adjusting the thrust. For example, as shown in FIG. 5, the output of the anesthesia monitoring center 9 is communicatively coupled to a stepper motor 19 such that the stepper motor 19 can receive signals that adjust thrust. The input 20 of the anesthesia monitoring center 9 is the acquired vital sign parameters of the patient, such as brain wave signals or heart rate.

Preferably, the injection device comprises a second barrel 2 for mixing different component medical solutions. The second cylinder 2 and the first cylinder 1 can be hermetically connected with each other through the piston 2. For example, as shown in fig. 1, the piston 2 is provided with a flow passage for discharging the mixed anesthetic liquid medicine in the second cylinder 2 to the first cylinder 1, and a check valve group 12 that allows the anesthetic liquid medicine in the second cylinder 2 to flow to the first cylinder 1 but does not allow the anesthetic liquid medicine in the first cylinder 1 to flow to the second cylinder 2 is provided in the flow passage.

Preferably, the second cylinder 2 is communicable with the chemical liquid delivery portion. Specifically, the screw 5 is provided with a through hole and a blade 11 having a notch at a portion inside the second cylinder 3. The extension part of the screw 5 extending to the outside of the second cylinder 3 is provided with a liquid medicine inlet 16, and the liquid medicine inlet 16 is connected with the liquid medicine tank 6 through a liquid medicine pipe 7. Preferably, the through holes are arranged in a spiral shape on the wall surface of the screw rod 5, and during the rotation of the screw rod 5, the liquid medicine sprayed out of the spiral through holes can have an initial speed in a multi-angle mode, so that the sprayed liquid medicine is approximately in a spiral umbrella shape, the turbulent kinetic energy of the liquid medicine is increased, and the basic condition is provided for the full mixing of the liquid medicine. Preferably, the blades 11 are capable of agitating the liquid medicines at linear velocities of the same magnitude but different directions from each other to mix them. For example, adjacent blades 11 are spatially offset from each other. During the agitation of the liquid medicine, the blades 11 rub against the liquid medicine, and some of the medicine may be damaged thereby. Therefore, in order to overcome this problem, the blade 11 is provided with a plurality of smoothly processed cuts, and the roughness of the cuts is preferably less than 1.60, even less than 0.80. Preferably, the material of the blade 11 is preferably a soft material, such as TPE material, to reduce the hard contact force between it and the medical fluid. In the invention, the notch is arranged to have the following advantages: 1. after the notch is formed, the surface area of the blade is reduced, so that the contact area of the liquid medicine and the blade can be reduced; 2. moreover, due to the opening of the notch, when the liquid medicine passes through the notch, turbulent flow is generated to promote turbulent flow, and the turbulent kinetic energy of the liquid medicine can be further increased.

Preferably, the second cylinder 3 can discharge different-component liquid medicine to the first cylinder 1 through the piston 2. For example, when the anesthetic liquid in the second cylinder 3 overcomes the resistance of the check valve set, the second cylinder 3 may discharge the mixed anesthetic liquid to the first cylinder 1 through the flow passage. As shown in fig. 3, the flow passage in the piston 2 is provided with a first check valve group 12 matching the flow passage. A spring is connected to one side of the first check valve set 12 located on the first cylinder 1, and one end of the spring is located on the base of the piston 2. The flow channel is divided into at least two sections. Preferably, the first section of the flow channel is located at one side of the second cylinder 3. The second section of the flow channel is located on one side of the first barrel 1. The first section has a gradually decreasing cross-sectional area in the direction of fluid flow to allow the anesthetic solution to be pressurized at this section, facilitating its overcoming of the spring resistance, and thereby conducting the first check valve set 12. The sectional area of the second section is gradually increased along the flowing direction of the fluid, so that the anesthetic liquid can flow to the first cylinder 1 after the pressure of the second section is reduced. Preferably, the minimum cross-sectional area of the first section is less than the minimum cross-sectional area of the second section. The first check valve set 12 is disposed at a junction of the first section and the second section. In addition, when piston 2 removed under the effect of thrust, because the anesthetic liquid medicine fluid pressure of second barrel 3 is greater than the anesthetic liquid medicine fluid pressure of first barrel 1 in the juncture of first section and second section to the anesthetic liquid medicine fluid of first barrel 1 can not flow backward to second barrel 3, thereby makes the anesthetic liquid medicine fluid of first barrel 1 can arrange to the syringe needle, accomplishes the injection.

Preferably, at least one mixing and injecting part which can mix liquid medicines with different components and push the piston 2 to generate pushing force for pushing the anesthetic liquid medicine in the first cylinder 1 to the injection needle 15 is arranged in the second cylinder 3. The mixed injection part can mix the anesthetic liquid medicine and can generate thrust to the piston to push the anesthetic liquid medicine to the injection needle 15 to complete injection. Set up at least one and thoughtlessly annotate the portion, can guarantee to mix the even condition and adjust injection speed according to the anesthesia condition of receptor to satisfy the further anesthesia of receptor under different anesthesia states, can guarantee the life safety of receptor in coordination with the doctor. Secondly, according to the anesthesia concentration required by the receptor in different periods during the operation, the anesthesia liquid medicine can be mixed under the condition of ensuring the injection speed so as to meet the anesthesia requirement in different periods during the operation.

Preferably, the injection device comprises at least two co-injection portions that can rotate independently of each other, so that at least one co-injection portion can push the piston 2 in rotation. For example, when it is necessary to reduce the injection speed and increase the mixing efficiency, it is possible to reduce the thrust speed of the mixing portion for generating the thrust while increasing the rotational speed of at least one mixing portion. For example, when the injection speed needs to be stabilized and the mixing efficiency needs to be improved, the injection speed can be stabilized by increasing the rotational speed of at least one mixing section and stabilizing the propulsion speed of the mixing section for generating the thrust. For another example, when the injection speed needs to be increased and the mixing efficiency needs to be increased, all the mixing and injecting sections can simultaneously generate thrust and increase the rotation speed.

Preferably, the rotational speed and the propulsion speed of each mixing and injection section can be adjusted by a respective stepper motor 19 in the case of an adjustment signal from the anesthesia monitoring center 9. The speed matching of the plurality of stepping motors needs to be exemplified by rotation speed data and pushing speed data. Furthermore, the anesthesia monitoring center 9 is provided with a second layer of inventive features, by way of example, for a data adjustment scheme for a plurality of stepper motors. That is, the core surrounds: how to determine the adjustment scheme/speed data of the stepper motor.

Preferably, the outer wall of the second cylinder 3 is provided with a heating element 10. The first cylinder 1 has a smaller thermal conductivity than the second cylinder 3 so that the anesthetic solution can be injected into the recipient within a reasonable temperature range.

Preferably, the second cylinder 3 is provided with different screw interfaces 31 for cooperating with screws 5 in different co-injection parts, so that at least one co-injection part can push the piston 2 after adjusting the rotation speed and thus changing the pushing force, while the remaining co-injection parts can only be responsible for mixing anesthetic liquids of different compositions after adjusting the rotation speed. The lead, helix angle, and orientation angle of the screw interface 31 may all be set to be different.

Preferably, a check valve set 12 is built in the piston 2 to allow the anesthetic liquid in the first cylinder 1 to be reversely discharged to the second cylinder 2.

Preferably, a portion of the screw 5 that can extend to the outside of the second cylinder 3 is provided with a liquid medicine port 16 for delivering the liquid medicine to the second cylinder 3. The chemical liquid inlet 16 can communicate with the chemical liquid delivery portion.

Example 2

The present embodiment provides an anesthetic liquid injection device. As shown in fig. 1, the injection device comprises a screw 5 with a hollow structure for delivering anesthetic liquid and a second cylinder 3 with a heating element 10 arranged on the outer wall, wherein a resistance wire electrically connected with a power supply is arranged in the heating element 10. As shown in fig. 2, the second cylinder 3 has a screw interface 31 that is engaged with the screw 5, so that the screw 5 is rotatably connected to the second cylinder 3. The screw 5 is provided with a through hole and a blade 11 having a notch at a position inside the second cylinder 3. The extension part of the screw 5 extending to the outside of the second cylinder 3 is provided with a liquid medicine inlet 16, and the liquid medicine inlet 16 is connected with the liquid medicine tank 6 through a liquid medicine pipe 7. The screw 5 is connected to a piston 2 having a first check valve group 12 built therein and having the same inner diameter as the injection cylinder. The piston 2 divides the syringe barrel into a second barrel 3 and a first barrel 1. When the first check valve set 12 is conducted, the second cylinder 3 is communicated with the first cylinder 1. The first barrel 1 is connected to a needle 15 by a needle mount 13. Considering that the temperature is low, the medicine components are possibly precipitated as crystal particles, the anesthetic effect is reduced, the heating is beneficial to the dissolution of the crystal, and the effect of the anesthetic liquid medicine is exerted. When the anesthetic liquid medicine is in the second barrel 3, because the built-in resistance wire of heating member 10 generates heat and transmits to inside the second barrel 3, through rotatory screw rod 5, the anesthetic liquid medicine has angular velocity, and the anesthetic liquid medicine carries out heat transfer and mass transfer effect to effectively exert the effect of anesthetic.

Preferably, at least one layer of heat insulation layer is arranged outside the first cylinder body 1. At least one layer of heat insulation layer is connected with the outer wall of the first cylinder body 1 in a detachable mode. Such as adhesive bonding. The thermal conductivity coefficient of the heat-insulating layer material is less than or equal to 0.12W/(K.m), such as organic materials such as polyurethane foam and inorganic materials such as glass wool. Specifically, the first cylinder 1 is externally provided with a layer of polyurethane foam, and the polyurethane foam is connected with the outer wall of the second cylinder 3 in a bonding manner. For another example, the first cylinder 1 may be further externally provided with 2 layers, 3 layers or even more layers of glass wool. The insulating layer may also be covered by a metal protective layer.

Preferably, the material of the injection cylinder is silicone grease which is transparent and has good heat conducting properties. The injection cylinder body is also provided with a graduated scale, and the division value is 1 mm.

Preferably, an insulating structure taking insulating magnesia powder as a substrate is arranged between the resistance wire and the heating element 10. One end of the resistance wire is connected with the first conductive rod in a detachable mode, and the other end of the resistance wire is connected with the second conductive rod in a detachable mode. The first conductive rod is connected with the positive pole of the power supply, and the second conductive rod is connected with the negative pole of the power supply. The material of the heating member 10 may be one of ceramic, stainless steel, and glass fiber. The material of the resistance wire can be one of Cr20Ni80, 0Cr25Al5 and Cr15Ni 60. Specifically, the material of the heating element 10 is ceramic. The material of the resistance wire is Cr20Ni80, and the cross section of the resistance wire is circular with the radius of 0.2 mm. First conducting rod and second conducting rod all adopt copper conducting rod, and the both ends of resistance wire all are provided with hangs the knot, and first conducting rod and second conducting rod have with hang the couple that detains the matching to the one end of resistance wire is connected with first conducting rod with the detachable form, and the other end of resistance wire is connected with the second conducting rod with the detachable form. The power supply is preferably a miniature power supply, such as a miniature power supply model S-60-5 or a battery pack consisting of 12V lithium batteries connected in series. The heating element 10 is controlled by a manual switch, and when heating is needed, a medical staff connects a micro power supply into a circuit in the heating element 10 and starts the switch to heat. The heating element 10 is also provided with a digital display temperature detector, and when the temperature reaches the ideal temperature of the anesthetic agent, the loop between the micro power supply and the heating element is manually disconnected according to the temperature displayed by the digital display temperature detector.

Preferably, as shown in fig. 2, one end of needle holder 13 is removably connected to the outlet end of first barrel 1. A microporous filter element 18 with the filtering precision of 5-10 microns is arranged in one end of the needle seat 13 and used for preventing solid particles from entering the body of a receptor, and the microporous filter element 18 comprises a filter framework and a filter screen attached to the filter framework. The filtering framework of the microporous filtering core 18 is connected with the liquid outlet 17 of the first cylinder 1 in a detachable mode. The material of the filter screen is one of polypropylene, absorbent cotton and glass fiber. Specifically, one end of the needle base 13 is connected with the liquid outlet end of the first barrel 1 in a threaded manner. The filtering framework is connected with the liquid outlet 17 of the first cylinder 1 in a threaded manner. The material of the filter screen is polypropylene. The filtration accuracy of the microporous filter cartridge 18 was 10 microns.

Preferably, the other end of the needle holder 13 is detachably connected to the needle 15. A second check valve set 14 is detachably arranged between the needle seat 13 and the first barrel 1. Specifically, the other end of the needle holder 13 is connected to the needle 15 by means of a screw thread. A second one-way valve set 14 is arranged in a threaded manner between needle base 13 and first barrel 1.

Preferably, one end of the screw 5 is connected with a knob 4 connected with the output shaft of the stepping motor. Specifically, the knob is fixed to the screw 5 and the output shaft of the stepping motor by welding. The output shaft of the stepping motor is driven by the stepping motor. The stepping motor is preferably UIM 24008. The power supply for the stepper motor is preferably a 12V lithium battery.

Preferably, the outer wall of the injection cylinder body is provided with at least one anti-slip layer consisting of anti-slip blocks. At least one anti-slip block is distributed on the outer wall of the injection cylinder in an array. Or at least one anti-slip block is symmetrically distributed on the outer wall of the injection cylinder by taking the central axis of the injection cylinder as the center. Specifically, for example, the anti-slip block is one or more of a rubber sleeve, a silicone sleeve, an anti-slip spike and an anti-slip spiral thread. For example, 1 anti-slip spiral is distributed in a circumferential array on the outer wall of the injection cylinder. For another example, 1 anti-slip spiral line is symmetrically distributed on the outer wall of the injection cylinder by taking the central axis of the injection cylinder as the center. The number of the anti-skid blocks can be 2, 3 or more.

Preferably, the blade 11 comprises a blade base plate and a blade mounting section. The blade base plate and the blade mounting section are arranged in an integrated manner. The notch is arranged on the blade substrate. The blade mounting section is fixedly connected with the screw 5. Specifically, the blade mounting section is fixedly connected with the screw 5 by welding.

Preferably, the heating element 10 also partially covers the outer wall of the first cylinder 1. Specifically, the heating member 10 covers the outer wall of the first cylinder 1 near 3/4 of the second cylinder 1.

The working principle is as follows: before the subject operates, the screw 5 is retracted to the upper end of the second cylinder 3. Starting the metering pump 8, the stepping motor and the heating element control button, injecting the anesthetic liquid medicine into the screw rod 5 through the liquid medicine pipe 7, driving the screw rod 5 to rotate by the stepping motor, driving the blades 11 to rotate, and performing heat transfer and mass transfer effects on the anesthetic liquid medicine. The first check valve set 12 is in an open state when the pressure of the anesthetic liquid can overcome the spring resistance thereof, but the flow rate thereof is smaller than that of the metering pump 8, so that the anesthetic agent has enough time to transfer heat and mass in the second cylinder 3. When the first cylinder 1 is filled with air, the second check valve set 14 is opened to exhaust the air in the needle. The needle head is inserted into the position of the receptor to be injected and is driven by the stepping motor to complete the injection.

During the completion of an injection, there are two situations. First, the injection volume of the first cylinder 1 can satisfy the injection amount, and the metering pump 8 is closed. Secondly, the injection volume of the first cylinder 1 cannot meet the injection amount, and the metering pump 8 is still opened during the injection process to continuously supplement the anesthetic into the injection cylinder.

It should be noted that the above-mentioned embodiments are exemplary, and that those skilled in the art, having benefit of the present disclosure, may devise various arrangements that are within the scope of the present disclosure and that fall within the scope of the invention. It should be understood by those skilled in the art that the present specification and figures are illustrative only and are not limiting upon the claims. The scope of the invention is defined by the claims and their equivalents.

Claims

1. An anesthetic liquid medicine injection device capable of adjusting an injection speed and an anesthetic liquid medicine mixing efficiency simultaneously, comprising:

a first barrel (1) communicable with an injection needle (15);

the piston (2) is used for pushing the anesthetic liquid medicine of the first cylinder (1) to the injection needle (15) under the condition of receiving thrust;

an anesthesia monitoring center (9) capable of generating a signal to adjust said thrust to adjust the injection speed; and

at least one said mixing and injection part capable of acting on said piston (2) to generate thrust;

it is characterized in that the preparation method is characterized in that,

the injection device comprises a second cylinder (3) which can be communicated with the liquid medicine conveying part;

wherein, at least one mixing and injecting part can mix the liquid medicine in the second barrel (3) at a fixed rotation speed or a variable rotation speed under the condition that the mixed liquid medicine of different components in the first barrel (1) is pushed to the injection needle (15) at a fixed injection speed or a variable injection speed through the piston (2) in response to an adjusting signal of the anesthesia monitoring center (9).

2. Injection device according to claim 1, characterized in that it comprises at least two co-injection portions that can rotate independently of each other, so that at least one co-injection portion can push the piston (2) in rotation.

3. The injection device according to claim 1 or 2, characterized in that the rotational speed and the thrust speed of the co-injection section can be adjusted by a respective stepper motor (19) in the case of an adjustment signal from the anesthesia monitoring center (9).

4. Injection device according to one of the preceding claims, characterized in that the outer wall of the second cylinder (3) is provided with a heating element (10), the thermal conductivity of the first cylinder (1) being smaller than the thermal conductivity of the second cylinder (3) so that the anesthetic liquid can be injected into the recipient within a reasonable temperature range.

5. Injection device according to one of the preceding claims, characterized in that the second cylinder (3) is provided with different screw connections (31) for interacting with screws (5) in different co-injection sections, so that at least one co-injection section can push the piston (2) after the rotational speed has been adjusted, thereby changing the pushing force, while the remaining co-injection sections can only be responsible for mixing anesthetic liquids of different compositions after the rotational speed has been adjusted.

6. Injection device according to one of the preceding claims, characterized in that the second cylinder (2) is provided with a damping portion capable of abutting the piston (2) against the screw without rotation of the co-injection portion.

7. Device according to one of the preceding claims, characterized in that a set of one-way valves (12) is built into the piston (2) to allow different back-venting of the anesthetic liquid of the first barrel (1) to the second barrel (2).

8. Injection device according to one of the preceding claims, characterized in that the part of the screw (5) which can extend outside the second cylinder (3) is provided with a liquid medicine port (16) for delivering liquid medicine to the second cylinder (3);

the drug solution inlet (16) can be communicated with a drug solution delivery part.

9. Injection device according to one of the preceding claims, characterized in that the screw (5) is provided with a through hole and a blade (11) with a cut-out, in the area placed inside the second cylinder (3);

the blade (11) comprises a blade base plate and a blade mounting section, the blade base plate and the blade mounting section are arranged in an integrated mode, the blade base plate is provided with at least one notch, and the blade mounting section is connected with the screw (5).

10. Injection device according to one of the preceding claims, wherein the outlet end of the first barrel (1) is detachably connected to one end of the needle holder (13);

a microporous filtering filter element (18) with the filtering precision of 5-10 microns is arranged in one end of the needle seat (13) for preventing solid particles from entering a receptor body; the microporous filter element (18) comprises a filter framework and a filter screen attached to the filter framework;

the filtering framework of the microporous filtering filter element (18) is detachably connected with the liquid outlet (17) of the first cylinder body (1).