Abdominocentesis pressure-limiting exhaust fixing device

Abstract

The invention relates to an abdominal cavity puncture pressure-limiting exhaust fixing device which comprises a needle cylinder assembly (1), a sleeve assembly (2) and a fixing frame assembly (3). The needle cylinder assembly (1) comprises a needle cylinder (11) and a needle head (12); a one-way valve (111) used for preventing water seal liquid from being poured into the abdominal cavity is arranged in the needle cylinder (11), and a fixing frame assembly (3) used for fixing the needle cylinder (11) is arranged outside the needle cylinder (11). The needle head (12) is sleeved with a sleeve assembly (2) capable of covering a spine of the needle head (12). Compared with the prior art, the device has the advantages that puncture complications are prevented, one-way exhaust is achieved, the puncture depth is flexible and adjustable, and fixation is good.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a pressure-limiting exhaust fixing device for abdominal puncture. Background Art

[0002] Natural orifice transluminal endoscopic surgery (NOTES) involves inserting a soft endoscope through the body's natural cavity, inserting operating instruments through its incision and through the endoscopic forceps channel to perform surgery outside the digestive tract wall. After the endoscope enters the abdominal cavity through the natural cavity, in order to obtain a good field of view and operating space, gas (air or carbon dioxide) must be inflated into the abdominal cavity through the endoscope. However, long-term continuous inflation of the abdominal cavity will increase the intra-abdominal pressure, which will lead to a series of serious adverse consequences, such as: dysfunction of abdominal organs, decreased cardiac output, and reduced venous return of the brain. Therefore, during NOTES surgery, it is usually necessary to use a puncture exhaust needle to expel excess gas from the body to prevent puncture complications.

[0003] Existing puncture exhaust needles usually consist of two parts: a puncture needle and a syringe that controls the exhaust speed. In actual use, there are the following disadvantages:

[0004] 1. The tip of the puncture needle is very sharp, and the depth of penetration into the body is relatively fixed and cannot be flexibly adjusted. For patients with thin body shape / thin abdominal wall, the needle inserted into the abdominal cavity is prone to be too long. When the amount of gas in the abdomen decreases and the intra-abdominal pressure decreases, the needle can easily injure the abdominal organs.

[0005] 2. The most common method to control the exhaust speed is to inject a certain amount of liquid (such as saline) into the syringe for water sealing, and control the exhaust speed by the height of the water seal liquid (for example: the pressure of the 10cm high water seal liquid is 10cmH2O=7.4mmHg=0.98kPa). However, when the intra-abdominal pressure drops below the water seal liquid pressure, the water seal liquid will flow back into the abdominal cavity through the puncture needle, posing a risk of infection.

[0006] 3. Existing puncture and exhaust needles lack a suitable fixing method. When the patient's breathing and body position change, they are easy to loosen and fall over, and need to be repeatedly re-fixed. Summary of the invention

[0007] The purpose of the present invention is to provide a pressure-limiting exhaust fixing device for abdominal puncture to prevent puncture complications and avoid backflow of water sealing liquid.

[0008] The purpose of the present invention can be achieved by the following technical solutions: A pressure-limiting exhaust fixing device for abdominal puncture, comprising a syringe assembly, a sleeve assembly and a fixing frame assembly;

[0009] The syringe assembly comprises a syringe and a needle;

[0010] The syringe is provided with a one-way valve inside for preventing the water-sealing liquid from being poured into the abdominal cavity, and the syringe is provided with a fixing frame assembly outside for fixing the syringe;

[0011] The needle is covered with a sleeve assembly which can cover the sharp thorn of the needle.

[0012] Preferably, the one-way valve is arranged at the bottom of the syringe and is a thin silicone rubber sheet. The outer ring of the one-way valve is bonded to the inner bottom of the syringe, and the inner ring has multiple curved spokes that allow the middle part to move axially.

[0013] The needle cylinder above the one-way valve is filled with water sealing liquid, and the lower part of the one-way valve is communicated with the needle through the head end of the needle cylinder.

[0014] Preferably, the sleeve assembly comprises a sleeve and a sleeve seat sleeved on the needle;

[0015] The head of the sleeve is flat and can cover the spike of the needle. One end of the sleeve seat is connected to the sleeve, and the other end is provided with an annular positioning groove;

[0016] An elastic positioning card corresponding to the annular positioning groove is arranged at the bottom of the outer side of the syringe.

[0017] Further preferably, the total length of the cannula and the cannula seat is shorter than the needle;

[0018] The sleeve seat is located between the elastic positioning card and the needle, and the claw of the elastic positioning card is a certain distance away from the bottom of the outer side of the syringe. This distance allows the sleeve head to cover the spike of the needle when the sleeve seat moves to the point where the claw can be inserted into the annular positioning groove.

[0019] Further preferably, a protrusion is provided on the outer side of the sleeve seat, which can abut against the bottom of the elastic positioning card to transmit downward thrust. Moreover, after the puncture is completed (the puncture needle enters the abdominal cavity), the protrusion helps to easily pull the sleeve out (into the abdominal cavity), cover the needle head, and avoid puncture.

[0020] Further preferably, the needle comprises a puncture needle and a needle connecting portion;

[0021] One end of the puncture needle is provided with a sharp spike, and the other end is fixedly connected to the syringe through a needle connecting part.

[0022] More preferably, the inner side surface of the sleeve is in contact with the puncture needle, the outer side surface is smooth, and the inner side surface of the sleeve seat is in contact with the needle connecting portion.

[0023] Further preferably, the elastic positioning clip comprises an annular main body and a claw arranged inside the lower side of the annular main body.

[0024] More preferably, a plurality of claws are arranged around the lower portion of the annular main body.

[0025] Preferably, the syringe is made of transparent material.

[0026] Preferably, 10-15 cm of water sealing liquid is poured into the needle cylinder above the one-way valve.

[0027] Preferably, the water seal liquid comprises physiological saline.

[0028] Preferably, the fixing frame assembly comprises a plurality of supporting legs arranged around the outside of the syringe.

[0029] Further preferably, the support leg comprises a syringe fixing ring, a bellows and a foot plate;

[0030] The syringe fixing ring is connected to the syringe, one end of the corrugated tube is connected to the syringe fixing ring, and the other end is connected to the foot plate, and the foot plate is provided with a double-sided adhesive that can be bonded to the abdominal skin.

[0031] More preferably, three supporting legs are arranged on the outer side of the syringe, the arc surface of the syringe fixing ring of each supporting leg is smaller than one-third of the circular ring, and they are connected by double-sided tape.

[0032] Preferably, the fixing frame assembly further comprises a reinforcing rubber ring sleeved on the syringe fixing rings of the three supporting legs.

[0033] Further preferably, the syringe fixing ring is provided with a limiting protrusion for reinforcing the limiting position of the rubber ring.

[0034] A method for using the above-mentioned abdominal puncture pressure-limiting exhaust fixing device comprises the following steps:

[0035] S1: Assemble the cannula assembly and the fixing frame assembly onto the syringe assembly;

[0036] S2: injecting physiological saline into the syringe of the syringe assembly to form a water column;

[0037] S3: Select a suitable puncture point, perform skin disinfection, retract the cannula of the cannula assembly (outward of the abdominal cavity), expose the needle of the syringe assembly, and insert the needle vertically into the abdominal cavity;

[0038] S4: Determine the appropriate depth by the bubbles in the syringe and adjust the position of the fixing frame assembly on the syringe;

[0039] S5: Push the cannula of the cannula assembly out (into the abdominal cavity) and simultaneously retract the needle of the syringe assembly (out of the abdominal cavity);

[0040] S6: Fix the syringe assembly to the abdominal skin through the fixing frame assembly.

[0041] Preferably, step S2 adjusts the upper limit of the intra-abdominal pressure by adjusting the height of the water column (10 centimeters of water column [cmH2O] = 0.9806 kilopascals [kPa]).

[0042] Preferably, in step S2, a water column of 10-15 cm is formed in the syringe.

[0043] Preferably, in step S5, the protective film of the double-sided adhesive on the foot plate of the fixing frame assembly is torn off, and the foot plate is adhered to the abdominal wall skin.

[0044] Preferably, after the syringe assembly is fixed on the abdominal skin in step S5, the direction and depth of the needle are further adjusted through the bellows.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1. The present invention provides a pressure-limiting and exhaust fixing device for abdominal puncture used in natural orifice endoscopic surgery (NOTES). The device of the present invention is used in NOTES surgery to discharge excess gas in the abdominal cavity, maintain appropriate intra-abdominal pressure, prevent gas-related complications, and ensure smooth operation.

[0047] 2. The present invention can evaluate the intra-abdominal pressure during surgery and the suture effect after the wound is closed by observing the size and speed of the bubbles when the gas is discharged;

[0048] 3. The present invention can prevent the needle from piercing the internal organs and increase the safety of puncture and exhaust;

[0049] 4. The present invention can prevent the backflow of extracorporeal fluid and reduce the risk of perioperative infection;

[0050] 5. The present invention can flexibly adjust and fix the angle and depth of the puncture needle as needed, and is suitable for various conditions and complex situations;

[0051] 6. The device of the present invention has the advantages of preventing puncture complications, achieving one-way exhaust, flexible adjustment of puncture depth, and good fixation, and has broad application prospects in NOTES surgery;

[0052] 7. The present invention adopts the matching design of the elastic positioning card in the syringe assembly and the sleeve seat in the sleeve assembly, so that the elastic positioning card can not only limit the sleeve assembly in the horizontal direction, but also can position the position where the sleeve is extended, and can also help to pull out the sleeve to cover the needle at any time after the puncture is completed;

[0053] 8. The present invention fixes the syringe assembly at the target reference height through the syringe fixing ring in the fixing frame assembly, and adjusts and fixes the syringe assembly through the bellows in the fixing frame assembly. When the amount of gas in the abdominal cavity changes or the organs in the abdominal cavity move and block the cannula port / needle, and the insertion depth and angle of the puncture needle need to be adjusted, the height and tilt angle of the syringe can be adjusted directly by applying external force (such as by hand), and the three bellows will expand and contract accordingly. After the adjustment is completed, the bellows continue to provide rigid support force, so that the syringe assembly is fixed at the position when the external force is removed (such as when the hand is released). BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a structural schematic diagram of the abdominal puncture pressure-limiting exhaust fixing device of the present invention;

[0055] Figure 2 It is a schematic diagram of the structure of the syringe assembly of the present invention;

[0056] Figure 3 is a cross-sectional view of a syringe assembly of the present invention;

[0057] Figure 4 It is a structural schematic diagram of the one-way valve of the present invention;

[0058] Figure 5 It is a structural schematic diagram of the sleeve assembly of the present invention;

[0059] Figure 6 is a cross-sectional view of the sleeve assembly of the present invention;

[0060] Figure 7 It is a schematic diagram of the structure of the present invention when the sleeve is not extended;

[0061] Figure 8 It is a schematic diagram of the structure after the sleeve of the present invention is extended;

[0062] Fig. 9 It is a schematic diagram of the structure of the support leg of the present invention;

[0063] Fig.10 It is a schematic diagram of the structure of three supporting legs of the present invention;

[0064] Fig.11 It is a structural schematic diagram of the fixing frame assembly of the present invention;

[0065] In the figure: 1-syringe assembly, 11-syringe, 111-one-way valve, 112-elastic positioning card, 12-needle, 121-puncture needle, 122-needle connecting part, 2-cannula assembly, 21-cannula, 22-cannula seat, 221-annular positioning groove, 222-protrusion, 3-fixing frame assembly, 31-syringe fixing ring, 32-bellows, 33-foot plate, 34-reinforcement rubber ring. DETAILED DESCRIPTION

[0066] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0067] Example 1

[0068] A pressure-limiting exhaust fixing device for abdominal puncture comprises a syringe assembly 1, a sleeve assembly 2 and a fixing frame assembly 3.

[0069] The syringe assembly 1 includes a syringe 11 and a needle 12. A one-way valve 111 is provided inside the syringe 11 to achieve one-way exhaust, allowing only gas to be discharged from the body to the outside, and not allowing gas or liquid to enter the body from the outside. When there is too much gas in the abdominal cavity, the appropriate intra-abdominal pressure is maintained; when there is too little gas in the abdominal cavity, the backflow of water sealing liquid is avoided.

[0070] A fixing frame assembly 3 for fixing the syringe 11 on the abdominal skin is provided outside the syringe 11 .

[0071] Meanwhile, in this embodiment, the needle 12 is sleeved with a sleeve assembly 2 which can cover the spike of the needle 12 when needed.

[0072] The device of this embodiment can prevent puncture complications: while ensuring the puncture effect, it can prevent the puncture needle from injuring abdominal organs.

[0073] Example 2

[0074] A pressure-limiting and exhaust fixing device for abdominal puncture. In this embodiment, the sleeve assembly 2 specifically includes a sleeve 21 and a sleeve seat 22, wherein the head of the sleeve 21 is flat, one end of the sleeve seat 22 is connected to the sleeve 21, and the other end is provided with an annular positioning groove 221, and the outer bottom of the syringe 11 is provided with an elastic positioning card 112 corresponding to the annular positioning groove 221.

[0075] The elastic positioning card 112 can cooperate with the annular positioning groove 221 to position the sleeve assembly 2 to extend, so that when the sleeve assembly 2 is pulled out, the head of the sleeve 21 can cover the needle 12 to prevent accidental injury to abdominal organs.

[0076] In addition, in this embodiment, the fixing frame assembly 3 includes a plurality of supporting legs arranged around the outside of the syringe 11, each supporting leg includes a syringe fixing ring 31, a bellows 32 and a foot plate 33 connected in sequence, the syringe fixing ring 31 is connected to the syringe 11, and the foot plate 33 can be bonded to the abdominal skin. The rest is the same as in Embodiment 1.

[0077] The puncture depth of the device in this embodiment is flexible and adjustable: the depth of the puncture needle inserted into the body can be flexibly adjusted according to the actual situation (the patient's weight, the thickness of the abdominal wall, the amount of gas in the abdomen, whether the vent hole in the abdomen is blocked by the abdominal contents). And it is well fixed: during the puncture and exhaust process, the position of the device is always kept relatively fixed, so that the angle and depth of the device to the abdominal wall are not affected by changes in body position and respiratory movement.

[0078] Example 3

[0079] A pressure-limiting exhaust fixing device for abdominal puncture, the needle 12 comprises a puncture needle 121 and a needle connection part 122, one end of the puncture needle 121 is provided with a spike, and the other end is fixedly connected to the syringe 11 through the needle connection part 122. The inner side of the sleeve 21 fits with the puncture needle 121, and the outer side is smooth, the inner side of the sleeve seat 22 fits with the needle connection part 122, and the outer side fits with the elastic positioning card 112.

[0080] Moreover, in this embodiment, the total length of the sleeve 21 and the sleeve seat 22 is less than the length of the needle 12 (i.e., the distance from the sharp thorn of the puncture needle 121 to the outer bottom of the syringe 11), and the claw of the elastic positioning card 112 is also a certain distance away from the outer bottom of the syringe 11, and the sum of this distance and the total length of the sleeve 21 and the sleeve seat 22 is not less than the length of the needle 12. Through this design, when the sleeve assembly 2 is not extended, the sharp thorn of the puncture needle 121 can be exposed and puncture can be performed. When extended, the sharp thorn of the puncture needle 121 can be covered to prevent accidental injury to abdominal organs. The rest is the same as Example 2.

[0081] Example 4

[0082] A pressure-limiting exhaust fixing device for abdominal puncture, such as Figure 1 As shown, it includes a syringe assembly 1, a sleeve assembly 2 and a fixing frame assembly 3.

[0083] Among them, Figures 2-3 As shown, the syringe assembly is a conventional syringe 11 with a one-way valve 111 added to the inner bottom, and an elastic positioning card 112 added to the outer bottom of the syringe 11 .

[0084] like Figure 4 As shown, the one-way valve 111 is a thin silicone rubber sheet, whose outer ring is bonded to the bottom of the syringe 11, and the three curved spokes are to allow the middle part to move axially. When the pressure of the gas in the abdominal cavity is greater than the pressure caused by the height of the water column in the syringe 11, the middle part of the diaphragm is pushed up by the pressure to allow the gas to be discharged upward from the syringe 11 through the needle 12, and when the pressure of the gas in the abdominal cavity is less than the pressure caused by the water column in the syringe 11, the silicone rubber sheet covers the bottom hole of the syringe 11 to prevent the physiological saline in the syringe 11 from flowing into the abdominal cavity.

[0085] The function of the elastic positioning card 112 at the bottom is to position the sleeve assembly 2 to extend.

[0086] like Figures 5-6 As shown, the sleeve assembly 2 is composed of a sleeve 21 and a sleeve seat 22, which is sleeved on the needle 12. The sleeve 21 has no spikes on its head, and its function is to cover the spikes of the needle 12 and allow gas to pass through. There is a protrusion 222 on the sleeve seat 22, which is used to transmit downward thrust. There is a circle of grooves (annular positioning grooves 221) at the root of the sleeve seat 22, which is used to push the sleeve 21 to cover the needle tip so that the elastic positioning card 112 of the syringe assembly 1 can be embedded therein, thereby fixing the relative position of the sleeve 21 and the needle 12, ensuring that the needle tip can no longer pierce other organs. Figure 7 and Figure 8 The sleeve 21 is shown in the state where it is not extended and where it is extended.

[0087] The fixing frame assembly 3 consists of three Fig. 9 The support leg shown in the figure is composed of a syringe fixing ring 31, a bellows 32 and a foot plate 33. The bellows 32 can adjust the angle between the fixing frame assembly 3 and the syringe 11 and the angle between the foot plate 32 and the skin to adapt to the abdominal conditions of different individuals, and also allow a slight change in length. The foot plate 33 is affixed with double-sided tape, which adheres to the skin when used to prevent displacement and ensure the vertical position of the syringe 11; the arc surface of the syringe fixing ring 31 is slightly smaller than one-third of the circular ring, and the inner rings of the three fixing rings are affixed with double-sided tape to connect them together.

[0088] like Fig.10 As shown, the three supporting legs are combined together to present an open state before use. When the initial operation of the syringe 11 is completed, as shown in FIG. Fig.11 As shown, the double-sided tape in the fixing ring can fix the fixing frame assembly 3 and the syringe 11 circumferentially at a suitable height. After the angle of the supporting foot plate 33 and the abdominal skin is adjusted and pasted, a spatial triangular fixing frame is formed, and the fixing of the syringe 11 is completed. The role of the reinforcing rubber ring 34 in the figure is to increase the reliability of the fixation. It can be pre-sleeved on the syringe 11 and then put on the outside of the syringe fixing ring 31 after the fixation is completed.

[0089] Example 5

[0090] The invention discloses a pressure-limiting exhaust fixing device for abdominal puncture, which is composed of a puncture needle, a spring-clip positioning sleeve, a one-way valve cover, a syringe, a ring-shaped fixer, a corrugated support tube, a skin patch and the like.

[0091] Puncture needle: Similar to an ordinary syringe needle, it is a hollow tube with a sharp tip bevel that can be used to puncture the abdominal wall smoothly.

[0092] Spring clamp positioning cannula: the cannula is placed on the outside of the puncture needle, and the puncture needle is the inner core of the cannula. The cannula can be pulled out and retracted through the spring clamp at the tail end, and the length of pulling out / retracting is limited. Retract the cannula to expose the head of the puncture needle for puncture; pull out the cannula to cover the puncture needle to prevent accidental injury to abdominal organs.

[0093] One-way valve cover: placed at the bottom of the syringe, water sealing liquid can be poured above the valve cover, and the bottom of the valve cover is connected to the puncture needle through the head end of the syringe.

[0094] Ring-shaped fixer: It is composed of a clamp and a rubber band, and is used to fix the syringe. The clamp is composed of three arcs, which can be unfolded and formed into a ring to hold the syringe; the force to hold the syringe is provided by the rubber band, which can be put on the syringe in advance, and the clamp will be embedded with the rubber band to provide the clamping force after the syringe is clamped; the clamping force will prevent the relative movement between the syringe and the support frame in the absence of external force, and relative movement can be allowed when external force is applied to adjust the depth of the syringe entering the abdomen.

[0095] Corrugated support tube: The corrugated tube can be stretched to adjust its own length, bend to change the angle, maintain a certain rigidity to provide support, and can adapt to the non-planar shape of the abdomen of patients of different body shapes in different positions to meet the support needs. One end of the corrugated support tube is connected to the ring-shaped syringe holder, and the other end is connected to the skin patch.

[0096] Skin patch: The skin patch fixes itself to the skin through adhesive material, and then maintains the angle and depth of the puncture exhaust needle through the corrugated support tube and syringe holder.

[0097] In this embodiment:

[0098] Principle of cannula: The inner side of the cannula fits the puncture needle, and the outer side is smooth, which does not affect the sharpness of the puncture needle penetrating the abdominal wall into the abdominal cavity. The spring card positioner of the cannula enables the cannula to be pulled out or retracted relative to the needle, covering or exposing the puncture needle, and flexibly switching between the exhaust or puncture states of the puncture needle.

[0099] Principle of the fixed support device: It consists of three parts, a ring-shaped fixer, a corrugated support tube and a skin patch. These three parts can not only fix the relative position of the puncture needle (relative to the abdominal wall), but also manually adjust the direction and depth of the puncture needle as needed. The ring-shaped fixer fixes the syringe by friction, the skin patch is fixed to the skin by adhesion, and the corrugated support tube provides support through rigid materials. The clamp and rubber band of the ring-shaped fixer can change the friction under the action of external force to adjust the position of the fixer on the syringe; the gel material of the skin patch can be repeatedly torn off and pasted to adjust the position of the patch on the abdominal wall; the corrugated structure of the bellows can be folded and stretched to adjust the length of the support tube as needed.

[0100] The method for using the abdominal puncture pressure limiting exhaust fixing device of this embodiment comprises the following steps:

[0101] a. Assemble the puncture exhaust device, connect the puncture needle and syringe, insert the spring card positioning sleeve, connect the annular fixing ring, and connect the corrugated support tube and skin patch.

[0102] b. Inject normal saline into the syringe to form a water column with a height of 10-15 cm.

[0103] c. Select a suitable puncture point and disinfect the skin; retract the cannula, expose the needle, and insert the puncture needle vertically into the abdominal cavity.

[0104] d. Determine the appropriate depth by the bubbles in the syringe and adjust the position of the ring holder on the syringe.

[0105] e. Tear off the protective film of the skin patch and stick the three patches in sequence on the abdominal wall skin around the puncture needle to form a triangle.

[0106] f. Further adjust the direction and depth of the puncture exhaust needle through the bellows.

[0107] The device of the present invention has the functions of preventing the needle from piercing the internal organs, preventing the backflow of extracorporeal fluid, adjusting and fixing the angle and depth of the puncture needle, thereby increasing the safety and flexibility of puncture exhaust and improving the adaptability in complex situations and different conditions.

[0108] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A pressure-limiting exhaust fixing device for abdominal puncture, characterized in that: It comprises a syringe assembly (1), a sleeve assembly (2) and a fixing frame assembly (3); The syringe assembly (1) comprises a syringe (11) and a needle (12); The syringe (11) is provided with a one-way valve (111) for preventing the water-sealing liquid from being poured into the abdominal cavity, and the syringe (11) is provided with a fixing frame assembly (3) for fixing the syringe (11); The needle (12) is sleeved with a sleeve assembly (2) capable of covering the sharp thorn of the needle (12).

2. The abdominal puncture pressure limiting exhaust fixing device according to claim 1, characterized in that: The one-way valve (111) is arranged at the bottom of the syringe (11) and is a silicone rubber sheet. The outer ring of the one-way valve (111) is bonded to the inner bottom of the syringe (11), and the inner ring has a plurality of curved spokes that allow the middle part to move axially. The needle cylinder (11) above the one-way valve (111) is filled with water sealing liquid, and the one-way valve (111) below is connected to the needle (12) through the head end of the needle cylinder (11).

3. The abdominal puncture pressure limiting exhaust fixing device according to claim 1, characterized in that: The sleeve assembly (2) comprises a sleeve (21) sleeved on the needle (12) and a sleeve seat (22); The head of the sleeve (21) is flat and can cover the spike of the needle (12); one end of the sleeve seat (22) is connected to the sleeve (21), and the other end is provided with an annular positioning groove (221); An elastic positioning card (112) corresponding to the annular positioning groove (221) is provided at the outer bottom of the syringe (11).

4. The abdominal puncture pressure limiting exhaust fixing device according to claim 3, characterized in that: The total length of the sleeve (21) and the sleeve seat (22) is shorter than the needle (12); The sleeve seat (22) is located between the elastic positioning card (112) and the needle (12), and the claw of the elastic positioning card (112) is a certain distance away from the outer bottom of the syringe (11). This distance allows the head of the sleeve (21) to cover the spike of the needle (12) when the sleeve seat (22) moves to a point where the claw can be inserted into the annular positioning groove (221).

5. The abdominal puncture pressure limiting exhaust fixing device according to claim 3, characterized in that: A protrusion (222) is provided on the outer side of the sleeve seat (22), and the protrusion (222) can abut against the bottom of the elastic positioning card (112) to transmit a downward thrust.

6. The abdominal puncture pressure limiting exhaust fixing device according to claim 3, characterized in that: The needle (12) comprises a puncture needle (121) and a needle connecting portion (122); The puncture needle (121) is provided with a spike at one end, and the other end is fixedly connected to the syringe (11) via a needle connection portion (122); The inner side surface of the sleeve (21) is in close contact with the puncture needle (121), and the outer side surface is smooth; the inner side surface of the sleeve seat (22) is in close contact with the needle connecting portion (122).

7. The abdominal puncture pressure limiting exhaust fixing device according to claim 1, characterized in that: The fixing frame assembly (3) comprises a plurality of supporting legs arranged around the outside of the syringe (11).

8. The abdominal puncture pressure limiting exhaust fixing device according to claim 7, characterized in that: The supporting leg comprises a syringe fixing ring (31), a bellows (32) and a foot plate (33); The syringe fixing ring (31) is connected to the syringe (11); one end of the bellows (32) is connected to the syringe fixing ring (31) and the other end is connected to the foot plate (33); and the foot plate (33) is provided with a double-sided adhesive capable of bonding with the abdominal skin.

9. The abdominal puncture pressure limiting exhaust fixing device according to claim 8, characterized in that: The outer ring of the syringe (11) is provided with three supporting legs, the arc surface of the syringe fixing ring (31) of each supporting leg is less than one-third of the circular ring, and the supporting legs are connected by double-sided adhesive.

10. The abdominal puncture pressure limiting exhaust fixing device according to claim 9, characterized in that: The fixing frame assembly (3) also includes a reinforcing rubber ring (34) sleeved on the syringe fixing ring (31) of the three supporting legs.

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