Anesthetic needle puncture auxiliary tool based on disposable syringe

Abstract

The anesthetic needle puncture auxiliary tool based on the disposable syringe comprises a shell and an air pressure sensor, a syringe driving mechanism is arranged on the shell, the syringe driving mechanism can be detachably connected with a syringe outside the shell, and the syringe driving mechanism drives a piston of the syringe outside the shell to move. The outer side face of the outer shell or the outer shell extends outwards through an extension structure to be provided with an air pipe connector communicated with an air pressure sensor, and the air pipe connector can be connected with the outer shell puncture gas pipeline. And the air pressure sensor detects the air pressure change in the puncture gas pipeline outside the shell. The puncture needle is inflated and / or sucked through the injector, the air pressure sensor detects the air pressure change of the puncture needle, whether the puncture needle reaches the target position in the target object or not is judged, the structure is simple, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument technical field especially an anaesthetic needle puncture auxiliary tool based on disposable syringe. BACKGROUND

[0002] Epidural anesthesia refers to epidural space block anesthesia, that is, injecting anesthetic into the epidural space, blocking the spinal nerve root, and temporarily causing paralysis in the area it dominates. In the process of puncturing the epidural space, the operator usually determines whether the puncture needle has accurately entered the epidural space according to the sudden loss of resistance and negative pressure phenomenon. However, this method requires the operator to have rich clinical experience and high technical level. If the puncture is not in place or too deep, it will cause additional damage to the patient.

[0003] Chinese patent application No. 2023200486870 discloses an epidural space negative pressure fluorescence induction puncture device. The device includes a hollow cylinder, which is in communication with the side outlet of a three-way pipe. The cylinder is isolated to form a sealed fluorescence chamber. The top wall of the fluorescence chamber is formed by an elastic membrane. A thin slice structure is arranged in the fluorescence chamber in a rotating manner. The closed valve separates the upper and lower chambers. The upper chamber contains a mixture of fluorescent dye and oxalic acid ester derivative, and the lower chamber contains hydrogen peroxide. When the epidural space puncture needle punctures the epidural space, the valve opens, and the substances in the upper and lower chambers react to produce fluorescence. By observing the fluorescence, the puncture position can be accurately determined. The structure is complex, and the negative pressure state of the epidural space is introduced into the cylinder through the negative pressure channel and directly acts on the membrane, which is inconvenient to use. The control of the closed and open states of the valve is difficult to accurately position, and the fluorescence reaction may occur, causing misjudgment by medical staff. Moreover, the utility model is a disposable consumable product, which is time-consuming and laborious to manufacture, and is not suitable for popularization and use.

[0004] Chinese Patent Application No. 202123453781.4 discloses a negative pressure puncture needle for epidural anesthesia. One end of the needle tube is a needle tip, and the other end of the needle tube is fixed with a needle seat. The needle seat is threaded to a sleeve, and the sleeve is threaded to a heparin cap. The heparin cap, sleeve, needle seat, and needle tube are connected in sequence. One side of the sleeve has a through hole one and a through hole two. An air bag is fixed to the outside of the sleeve, and the air bag covers the through holes one and two. An air horn is installed inside the sleeve. The air inlet of the air horn is connected to the through hole one. The through hole two is equipped with a one-way valve to guide airflow from the sleeve to the air bag. The syringe inflates the air bag, and the puncture needle enters the epidural space. Airflow exits from the air horn, and an audible alert is generated to inform the doctor that the puncture needle has entered the epidural space. This patented tubing features a heat-fused airbag fixed to the outside of the tube. A slit is cut into the side of the tube, with the air horn facing the slit. The opening of the slit is larger than the maximum cross-section of the air horn to allow it to enter the tube. Due to the small size of the tube, the large-diameter slit design facilitates the installation of the air horn inside the tube. A copper sheet is sealed and fixed at the slit; the copper sheet is heat-fused and fixed at the slit, sealing the slit. The air horn is then heat-fused and fixed inside the tube. However, the small size of the tube itself makes installation difficult or insecure. Inflating the airbag is inconvenient and the inflation volume cannot be controlled. The deflation of the airbag is alerted to the doctor by sound, which could lead to misjudgment by medical staff due to mishearing. Furthermore, the complex structure results in high cost per use, hindering widespread adoption.

[0005] Current technologies rely on the subjective judgment of medical personnel to determine the puncture location, which cannot guarantee accuracy. Furthermore, improved solutions suffer from technical drawbacks such as complex structures and difficult manufacturing. Therefore, there is an urgent need for a puncture assistance tool that can objectively and accurately determine the entry of the puncture needle into the epidural space, addressing the shortcomings of existing technologies that primarily rely on the subjective judgment of medical personnel and suffer from complex structures and difficult manufacturing. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an anesthetic needle puncture auxiliary tool based on a disposable syringe. This tool inflates and / or inhales the puncture needle using a syringe, and a pressure sensor detects the pressure change of the puncture needle to determine whether the puncture needle has reached the target position within the target object. It has a simple structure and is easy to operate.

[0007] To achieve the above object, the utility model provides the following technical scheme: an anesthetic needle puncture auxiliary tool based on a disposable syringe, which comprises a shell and a gas pressure sensor, the shell is provided with a syringe driving mechanism, the syringe driving mechanism is detachably connected with the shell-out syringe, the syringe driving mechanism drives the piston of the shell-out syringe to move, thereby controlling the shell-out syringe to act on the shell-out puncture gas pipeline and inflate and / or deflate it, the outer side surface of the shell or the shell is provided with a gas tube interface in communication with the gas pressure sensor through an extension structure, the gas tube interface is connectable with the shell-out puncture gas pipeline, so that the gas pressure sensor detects the gas pressure change in the shell-out puncture gas pipeline.

[0008] Preferably, the syringe driving mechanism comprises a mounting frame and a driving assembly, the mounting frame is fixedly arranged on the shell, the outer side surface of the mounting frame is exposed to the shell, the outer side surface of the mounting frame is provided with a support, the body of the shell-out syringe is mounted on the support through a quick-release structure, the quick-release structure is one or a combination of plug-in structure, buckle structure, threaded structure or lock catch structure, the driving assembly drives the piston of the shell-out syringe to move along the axial direction of the shell-out syringe; the driving assembly is one or a combination of screw nut motion assembly, gear and rack motion assembly, belt drive assembly.

[0009] Preferably, the shell-out puncture gas pipeline comprises a connecting gas tube and a puncture needle, the shell-out syringe is connected with the puncture needle through the connecting gas tube, the connecting gas tube is connected with the gas pressure sensor, and the gas pressure sensor detects the gas pressure change in the connecting gas tube and the puncture needle.

[0010] Preferably, the outer side surface of the shell is provided with a mounting position, and the mounting position and the gas tube interface are located on two adjacent outer side surfaces of the shell, the gas pressure sensor is arranged in the shell, the inner end of the gas tube interface is connected with the gas pressure sensor, the outer end of the gas tube interface is connected with the connecting gas tube, and the syringe driving mechanism is arranged at the mounting position of the shell.

[0011] Preferably, the connecting gas tube comprises a three-way joint, a first gas tube and a second gas tube, the three joints of the three-way joint are connected with the first gas tube, the second gas tube and the gas tube interface respectively, the end of the first gas tube is detachably connected with the puncture needle, and the end of the second gas tube is connected with the output port of the shell-out syringe.

[0012] Preferably, when the quick-release structure is a buckle structure, it comprises a pressing plate and a quick-release buckle, the two sides of the body of the shell-out syringe are respectively provided with lugs, the support is provided with two struts, the two lugs are respectively sleeved on the struts, the pressing plate is connected with the struts through the quick-release buckle, and the pressing plate can press the body of the shell-out syringe against the support.

[0013] Preferably, the shell is provided with a display screen and / or an alarm mechanism, and the display screen and / or the alarm mechanism make corresponding alarm or light prompt that the puncture needle has entered the target position in the target object.

[0014] Preferably, the display screen also displays a waveform graph of air pressure, and the waveform graph of air pressure displays the air pressure change waveform graph collected by the air pressure sensor.

[0015] Preferably, the first air tube is provided with a conical surface at one end close to the puncture needle, and the puncture needle is provided with a conical hole matched with the conical surface, and the end of the first air tube with the conical surface can be inserted into the conical hole of the puncture needle, and the conical surface realizes friction self-locking through conical matching, so as to realize quick plug-in connection of the first air tube and the puncture needle.

[0016] Preferably, the first air tube is a flexible hose, the length of the first air tube is greater than 600 mm, the first air tube is a plastic tube or a silica gel tube after sterilization treatment, and the second air tube is a silica gel tube after sterilization treatment.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The target object is a biological tissue, when the puncture needle punctures, the needle tip of the puncture needle is inserted into the biological tissue, at this time, the working of the injector driving mechanism will cause the air pressure in the puncture needle to change and be fed back through the air pressure sensor, when the puncture needle reaches the epidural space in the biological tissue, the needle tip loses the blockage, part of the gas in the first air tube will enter the epidural space from the front end of the puncture needle, at the same time, the internal air pressure will tend to be stable again and be fed back to the air pressure sensor, the control system collects the signal of the air pressure sensor, and judges whether the puncture needle reaches the epidural space or not, then makes corresponding alarm or light prompt through the display screen and / or the alarm mechanism, and immediately stops the injector driving mechanism to avoid too much gas entering the epidural space.

[0019] 2. The air pressure is accurately controlled through the injector driving mechanism, and a large amount of gas will not enter the epidural space, the puncture depth can be accurately detected, the user can clearly know the change of the air pressure through the waveform graph, the misjudgment and over-penetration are prevented, the puncture needle is prevented from penetrating the hard model of the patient, the spinal cord or the nerve is prevented from being damaged, the puncture success rate is improved, the safety is high, the cost of consumables used each time is low, the structure is simple, and the utility model is convenient to use and popularize.

[0020] 3. Since the outer side of the mounting bracket is exposed to the outer shell, when the syringe lug is attached to the support column of the mounting bracket, the pressure plate is connected to the support column via a quick-connect buckle. The pressure plate can press the syringe body against the support column to achieve stable installation of the syringe. When the quick-connect buckle is removed, the syringe can be removed to achieve quick assembly and disassembly of the syringe. This is suitable for disposable syringes, eliminating the need for repeated sterilization of the syringe and ensuring that the gas pumped into the patient's body is sterile, thus avoiding infection.

[0021] 4. The connecting tubing connects to the pressure sensor via the tubing interface on the outer casing and can also be directly connected to the syringe output port, facilitating the installation and removal of the connecting tubing. The connecting tubing can also be used as a disposable consumable, eliminating the need for repeated sterilization of the connecting tubing, making it more convenient to use. Furthermore, both the syringe and the connecting tubing are inexpensive, reducing the cost of use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the novel embodiment without the connecting tube and syringe installed;

[0023] Figure 2 This is a schematic diagram of the overall structure of the present invention with the connecting tube and syringe already installed;

[0024] Figure 3 This is a schematic diagram of the internal structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the connection between the puncture needle and the second trachea.

[0026] Figure 5 This is a schematic diagram of the syringe structure;

[0027] Figure 6 This is a front view of the syringe drive mechanism.

[0028] Figure 7 This is a schematic diagram of the reverse structure of the syringe drive mechanism;

[0029] Figure 8 A schematic diagram of a puncture needle inserted into a target object;

[0030] Figure 9 This is a schematic diagram of the structure for inserting a puncture needle into the epidural space of the target object.

[0031] Reference: 1, housing; 11, tracheal interface; 111, third trachea; 12, mounting position; 2, syringe; 21, piston; 211, connecting ring; 22, lug; 3, puncture needle; 31, taper hole; 4, connecting trachea; 41, tee joint; 42, first trachea; 421, taper surface; 43, second trachea; 5, air pressure sensor; 6, syringe driving mechanism; 61, mounting frame; 62, support; 621, support column; 63, motor; 64, screw rod; 65, nut seat; 66, moving block; 67, first stroke switch; 68, second stroke switch; 69, anti-collision block; 7, pressing plate; 8, quick connection buckle; 9, display screen; 10, epidural space. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0033] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0035] As Figures 1-9As shown: a kind of anesthesia needle puncture auxiliary tool based on disposable syringe, including shell 1 and air pressure sensor 5, syringe driving mechanism 6 is provided on shell 1, syringe driving mechanism 6 can be detachably connected with the shell outside syringe 2, syringe driving mechanism 6 drives the piston 21 of shell outside syringe 2 to move, to control shell outside syringe 2 act on the shell outside puncture gas pipeline and carry out inflation and / or suction, the outside of shell 1 or the shell is extended outward by extension structure and is provided with the air pipe interface 11 of communication with air pressure sensor 5, air pipe interface 11 can be connected with the shell outside puncture gas pipeline, to make air pressure sensor 5 detect the air pressure change in the shell outside puncture gas pipeline.The shell outside syringe 2 is the disposable consumable after adopting sterilization treatment.

[0036] Preferably, syringe driving mechanism 6 includes mounting bracket 61 and drive assembly, mounting bracket 61 is fixedly arranged on shell 1, the outer side of mounting bracket 61 is exposed to shell 1, the outer side of mounting bracket 61 is provided with support 62, the body of shell outside syringe 2 is mounted on support 62 by quick-release structure, quick-release structure is one or combination of plug-in structure, buckle structure, threaded structure or lock catch structure, drive assembly drives the piston 21 of shell outside syringe 2 to move along the axial direction of shell outside syringe 2, drive assembly is one or combination of screw nut motion assembly, gear and rack motion assembly, belt drive assembly.

[0037] Further, the buckle structure of quick-release structure in the embodiment is specifically introduced: including pressing plate 7 and quick-release buckle 8, the two sides of the body of shell outside syringe 2 are respectively provided with lug 22, support 62 is provided with two struts 621, two lugs 22 are respectively sheathed on struts 621, pressing plate 7 is connected with struts 621 by quick-release buckle 8, and pressing plate 7 can press the body of shell outside syringe 2 on support 62.

[0038] Further, the screw nut motion assembly of drive assembly in the embodiment is specifically introduced: including motor 63, lead screw 64, nut seat 65 and moving block 66, motor 63, lead screw 64 and nut seat 65 are located at the inner side of mounting bracket 61, moving block 66 is located at the outer side of mounting bracket 61, nut seat 65 is guided and slips along the axial direction of syringe 2 with mounting bracket 61, the guided and slip cooperation is realized by the structure of guide rod, of course, it can also be the structure of guide rail and guide groove, the axial direction of lead screw 64 is parallel to the axial direction of syringe 2, lead screw 64 is rotationally arranged on mounting bracket 61, nut seat 65 is sheathed on lead screw 64 and is threadedly connected with lead screw 64, nut seat 65 is fixedly connected with moving block 66, connecting ring 211 is provided on the piston 21 of syringe 2, connecting ring 211 is sheathed on moving block 66, motor 63 directly drives or drives lead screw 64 to rotate through transmission assembly, so as to drive nut seat 65, moving block 66 and the piston 21 of syringe 2 to move together.The transmission assembly is the structure of transmission belt and pulley, of course, it can also be the structure of gear set.

[0039] Further, the mounting frame 61 is further provided with a first stroke switch 67 and a second stroke switch 68, the first stroke switch 67 and the second stroke switch 68 can detect the moving position of the nut seat 65, and the nut seat 65 is respectively provided with an anti-collision block 69 at the front and back ends in the axial direction of the screw rod 64.

[0040] Preferably, the shell-out puncture gas pipeline comprises a connecting gas tube 4 and a puncture needle 3, the shell-out injector 2 is connected with the puncture needle 3 through the connecting gas tube 4, the connecting gas tube 4 is connected with the air pressure sensor 5, and the air pressure sensor 5 detects the air pressure change in the connecting gas tube 4 and the puncture needle 3.

[0041] Preferably, the outer side of the shell 1 is provided with a mounting position 12, the mounting position 12 and the gas tube interface 11 are located on two adjacent outer sides of the shell 1, the air pressure sensor 5 is arranged in the shell 1, the inner end of the gas tube interface 11 is connected with the air pressure sensor 5 through a third gas tube 111, the outer end of the gas tube interface 11 is connected with the connecting gas tube 4, the injector driving mechanism 6 is arranged at the mounting position 12 of the shell 1, the connecting gas tube 4 comprises a three-way joint 41, a first gas tube 42 and a second gas tube 43, the three joints of the three-way joint 41 are connected with the first gas tube 42, the second gas tube 43 and the gas tube interface 11 respectively, the first gas tube 42 is a flexible hose with a length of more than 600 mm, the end of the first gas tube 42 is detachably connected with the puncture needle 3, and the end of the second gas tube 43 is connected with the output port of the shell-out injector 2. The first gas tube 42 is a plastic tube or a silica gel tube after sterilization treatment, and the second gas tube 43 is a silica gel tube after sterilization treatment.

[0042] Further, the specific structure that the end of the first gas tube 42 is detachably connected with the puncture needle 3 is that the first gas tube 42 is provided with a tapered surface 421 at one end close to the puncture needle 3, one end of the puncture needle 3 is provided with a tapered hole 31 matched with the tapered surface 421, the end of the first gas tube 42 with the tapered surface 421 can be inserted into the tapered hole 31 of the puncture needle 3, and the tapered fit is used to realize the friction self-locking, so as to realize the quick plug connection of the first gas tube 42 with the puncture needle 3.

[0043] Preferably, the shell 1 is provided with a display screen 9 and / or an alarm mechanism, the display screen 9 and / or the alarm mechanism make corresponding alarm or light prompt that the puncture needle has entered the target position in the target object, the alarm mechanism is a buzzer or an alarm lamp, the target position is in an epidural space 10, and the display screen 9 further displays a waveform graph of air pressure, and the waveform graph of air pressure displays the air pressure change waveform graph collected by the air pressure sensor.

[0044] Working principle: when using the device, connect the three-way joint 41 with the tracheal interface 11, install the syringe 2 on the syringe driving mechanism 6 through the quick buckle 8 and the pressing plate 7, connect one end of the second tracheal tube 43 with the syringe 2, and the other end with the three-way joint 41, connect the first tracheal tube 42 with the three-way joint 41, and connect the puncture needle 3 with the other end of the first tracheal tube 42, and the connection between the puncture needle 3 and the first tracheal tube 42 is conical surface fitting fixation, which can realize quick plug-in and plug-out during use.

[0045] After the connection between the tracheal tube 4 and the puncture needle 3 is completed, the syringe driving mechanism 6 starts to work, driving the piston 21 of the syringe 2 to move, inflating the puncture needle 3, and when the puncture needle 3 is not working, the needle tip is exposed to the air, and the gas delivered by the syringe 2 will be discharged through the puncture needle 3, so the work of the syringe 2 will not affect the internal gas pressure of the channel.

[0046] When the puncture needle 3 punctures, the needle tip of the puncture needle 3 is inserted into the target object, and the needle tip of the puncture needle 3 is blocked and sealed (as shown in Figure 8 When the puncture needle 3 punctures, the needle tip of the puncture needle 3 is inserted into the target object, and the needle tip of the puncture needle 3 is blocked and sealed (as shown in Figure 9 When the puncture needle 3 punctures, the needle tip of the puncture needle 3 is inserted into the target object, and the needle tip of the puncture needle 3 is blocked and sealed (as shown in

[0047] The basic principle and main features of the present application and the advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic features of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An anesthetic needle puncture assisting tool based on a disposable syringe, characterized by, The shell is provided with a syringe driving mechanism, which is detachably connected with the syringe outside the shell, and drives the piston of the syringe outside the shell to move, so as to control the syringe outside the shell to act on the gas pipeline outside the shell and inflate and / or deflate the gas pipeline outside the shell. The outer side of the shell or the shell is extended outward through an extension structure and is provided with a gas tube interface in communication with the gas pressure sensor. The gas tube interface is connected with the gas pipeline outside the shell, so that the gas pressure sensor detects the change of the gas pressure in the gas pipeline outside the shell.

2. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 1, characterized in that, The syringe driving mechanism comprises a mounting frame and a driving assembly. The mounting frame is fixedly arranged on the shell, and the outer side of the mounting frame is exposed to the shell. The outer side of the mounting frame is provided with a support. The body of the syringe outside the shell is mounted on the support through quick-release structure. The quick-release structure is one or a combination of plug-in structure, buckle structure, threaded structure or lock structure. The driving assembly drives the piston of the syringe outside the shell to move along the axial direction of the syringe outside the shell. The driving assembly is one or a combination of screw-nut motion assembly, gear-rack motion assembly and belt drive assembly.

3. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 1, wherein The gas pipeline outside the shell comprises a connecting gas tube and a puncture needle. The syringe outside the shell is connected with the puncture needle through the connecting gas tube. The connecting gas tube is connected with the gas pressure sensor. The gas pressure sensor detects the change of the gas pressure in the connecting gas tube and the puncture needle.

4. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 3, characterized in that, The outer side of the shell is provided with a mounting position. The mounting position and the gas tube interface are located on two adjacent outer sides of the shell. The gas pressure sensor is arranged in the shell. The inner end of the gas tube interface is connected with the gas pressure sensor. The outer end of the gas tube interface is connected with the connecting gas tube. The syringe driving mechanism is arranged at the mounting position of the shell.

5. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 3, wherein The connecting gas tube comprises a three-way joint, a first gas tube and a second gas tube. The three joints of the three-way joint are connected with the first gas tube, the second gas tube and the gas tube interface respectively. The end of the first gas tube is detachably connected with the puncture needle. The end of the second gas tube is connected with the output port of the syringe outside the shell.

6. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 2, wherein, When the quick-release structure is a buckle structure, it comprises a pressing plate and a quick-release buckle. The body of the syringe outside the shell is provided with two lugs on both sides. The support is provided with two struts. The two lugs are respectively sleeved on the struts. The pressing plate is connected with the struts through the quick-release buckle. The pressing plate can press the body of the syringe outside the shell against the support.

7. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 3, wherein The shell is provided with a display screen and / or an alarm mechanism. The display screen and / or the alarm mechanism make corresponding alarm or light prompt that the puncture needle has entered the target position in the target object.

8. The anesthetic needle insertion assist tool based on a disposable syringe according to claim 7, characterized in that, The display screen also displays a waveform graph of the gas pressure. The waveform graph of the gas pressure displays the waveform graph of the change of the gas pressure collected by the gas pressure sensor.

9. The anesthetic needle insertion assist tool based on a disposable syringe of claim 5, wherein, The first gas tube is provided with a tapered surface at one end close to the puncture needle. One end of the puncture needle is provided with a tapered hole matched with the tapered surface. The end of the first gas tube with the tapered surface can be inserted into the tapered hole of the puncture needle, and the friction self-locking is realized through the taper matching, realizing the quick plug-in and pull-out connection of the first gas tube and the puncture needle.

10. The anesthetic needle insertion assist tool based on a disposable syringe of claim 5, wherein, The first air tube is a flexible hose, the length of the first air tube is greater than 600 mm, the first air tube is a sterilized plastic tube or a sterilized silica gel tube, the second air tube is a sterilized silica gel tube, and the shell-external syringe is a sterilized disposable consumable.

Images