Self-locking safety Veress needle

Abstract

The present invention relates to a self-locking safety type pneumoperitoneum needle, which comprises a puncture outer tube capable of performing abdominal wall puncture and an inflatable inner tube capable of filling carbon dioxide gas into the abdominal cavity after puncture, and also comprises a connection locking mechanism capable of locking the inflatable inner tube in the puncture outer tube. When the locking state between the inflatable inner tube and the puncture outer tube by the connection locking mechanism is released, the required puncture operation can be performed by using the puncture outer tube. When the puncture outer tube penetrates the abdominal wall, the inflatable inner tube can be immediately locked in the puncture outer tube by the connection locking mechanism. After the inflatable inner tube is locked in the puncture outer tube, the inner tube air outlet at the head of the inflatable inner tube is located outside the puncture tip of the puncture outer tube. The present invention can effectively realize the locking between the inflatable inner tube and the puncture outer tube after puncture, avoid damage to the tissue or organ in the abdominal cavity after successful puncture, and is easy to use, safe and reliable.

Description

Technical Field

[0001] The invention relates to a Veress needle, in particular to a self-locking safety Veress needle, belonging to the technical field of medical instruments. Background Art

[0002] During laparoscopic surgery, carbon dioxide pneumoperitoneum must be established first.

[0003] The current method of establishing carbon dioxide pneumoperitoneum is to clamp the skin around the navel with surgical forceps and lift it up, and then use the pneumoperitoneum needle to penetrate the various layers of tissue in the abdominal wall, including the skin, subcutaneous tissue, subcutaneous fat layer, subcutaneous muscle layer, and peritoneum. Among them, the peritoneum is particularly dense and tough. When the pneumoperitoneum needle penetrates the peritoneum, the resistance suddenly decreases, and the breakthrough feeling is very strong; the existing pneumoperitoneum needle cannot be safely self-locked when penetrating the abdominal wall, which can easily cause damage to the tissues or organs in the abdominal cavity and lead to accidents.

[0004] The puncture diameter of the Veress needle is small and cannot achieve effective self-locking when in use. There is an urgent need for a Veress needle that can self-lock the puncture tip when penetrating the abdominal wall to avoid damage to tissues or organs in the abdominal cavity. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a self-locking safety pneumoperitoneum needle, which has a compact structure and can effectively lock the inner inflation tube and the outer puncture tube after puncture, thereby avoiding damage to the intra-abdominal tissue or organs after successful puncture. The needle is easy to use and safe and reliable.

[0006] According to the technical solution provided by the present invention, the self-locking safety type pneumoperitoneum needle comprises a puncture outer tube capable of performing abdominal wall puncture and an inflatable inner tube capable of filling the abdominal cavity after puncture with carbon dioxide gas, the head end of the puncture outer tube is provided with a puncture tip for puncture, the head of the inflatable inner tube is provided with an inner tube air outlet hole connected to the inflatable inner tube, the inflatable inner tube is located inside the puncture outer tube, and the inflatable inner tube can reciprocate inside the puncture outer tube along the length direction of the puncture outer tube by using the inner tube elastic body;

[0007] It also includes a connection locking mechanism that can lock the inflation inner tube in the puncture outer tube. When the connection locking mechanism releases the locking state between the inflation inner tube and the puncture outer tube, the required puncture operation can be performed using the puncture outer tube. While the puncture outer tube penetrates the abdominal wall, the head end of the inflation inner tube pops out of the head end of the puncture outer tube, and the inflation inner tube can be immediately locked in the puncture outer tube through the connection locking mechanism. After the inflation inner tube is locked in the puncture outer tube, the inner tube air outlet at the head of the inflation inner tube is located in front of the puncture tip of the puncture outer tube.

[0008] It also includes an inflatable connector that is adaptably connected to the tail end of the inflatable inner tube, and the inflatable connector can be connected to the inflatable inner tube. A soft film protective layer is provided at the head end of the inflatable inner tube, and the shape of the head end of the inflatable inner tube includes a spherical shape.

[0009] It also includes a penetration indicator that can be adaptably connected to the inflation inner tube; the penetration indicator includes an air storage bag for storing gas and an air storage bag connecting tube connected to and communicated with the air storage bag, the air storage bag can be communicated with the inflation inner tube through the air storage bag connecting tube, and after the puncture outer tube penetrates the abdominal wall, the gas in the air storage bag connecting tube can be discharged through the inner tube outlet hole at the head of the inflation inner tube.

[0010] The connection and locking mechanism comprises an outer tube connection sleeve adapted to be connected to the tail of the puncture outer tube and an inner tube connection body adapted to be connected to the inflation inner tube, the inner tube connection body is located in the outer tube connection sleeve, the inflation inner tube passes through the outer tube connection sleeve and the puncture outer tube, and the head end of the outer tube connection sleeve is fixedly connected to the tail end of the puncture outer tube;

[0011] A connection positioning ring groove is provided on the inner tube connector, and a locking head which can be embedded in the connection positioning ring groove is provided on the outer tube connector sleeve. The locking head can be embedded in the connection positioning ring groove after passing through the outer tube connector sleeve. When the locking head is embedded in the connection positioning ring groove, the inflatable inner tube can be locked in the puncture outer tube.

[0012] It also includes a locking head control mechanism that can control the locking head to be embedded in the connecting positioning ring groove. The locking head can be kept embedded in the connecting positioning ring groove or the locking head can be separated from the connecting positioning ring groove through the locking control mechanism. When the locking head is separated from the connecting positioning ring groove through the locking control mechanism, the locking state of the inflation inner tube and the puncture outer tube can be released.

[0013] The locking head control mechanism includes a connecting rod pressing body hinged on the outer wall of the outer tube connecting sleeve, and the connecting rod pressing body includes a locking head first connecting rod connected to the locking head and an unlocking pressing body connected to the locking head first connecting rod. When the unlocking pressing body is pressed in a direction close to the outer wall of the outer tube connecting sleeve, the locking head can be separated from the connecting positioning ring groove.

[0014] The locking head control mechanism includes a locking head second connecting rod connected to the locking head, one end of the locking head second connecting rod is connected to the locking head, and the other end of the locking head second connecting rod passes through the outside of the locking connection sleeve protruding from the outer tube connecting sleeve; a locking elastomer is also provided in the locking connection sleeve, the locking elastomer is sleeved on the locking head second connecting rod, and the locking elastomer is located between the locking head and the top end in the locking connection sleeve.

[0015] The locking head control mechanism includes a locking control shell that can be sleeved on the outer tube connecting sleeve and a control shell elastomer located in the locking control shell. The locking head is fixed to the inner wall of the locking control shell, and the control shell elastomer is located between the outer wall of the outer tube connecting sleeve and the inner wall of the locking control shell. The control shell elastomer corresponds to the locking head. When the locking control shell is pressed so that the control shell elastomer is in a compressed state, the locking head can be separated from the connecting positioning ring groove.

[0016] The inner tube connector is sleeved on the inflatable inner tube, the inner tube elastic body is sleeved on the inflatable inner tube, and the inner tube elastic body is compressed between the inner tube connector and the blocking positioning body, the blocking positioning body is assembled in the tail end of the outer tube connecting sleeve, and the tail end of the inflatable inner tube passes through the blocking positioning body and out of the outer tube connecting sleeve.

[0017] The inner tube connector is connected to the inflatable inner tube in the outer tube connector sleeve, and the tail end of the inflatable inner tube is fixedly connected to the inner tube connector;

[0018] An inflatable connector is also provided on the outer tube connecting sleeve. The inner tube elastomer is compressed between the inflatable connecting sleeve and the tail end of the inflatable inner tube. The inflatable connector is connected to the inflatable inner tube through the inner tube connector. A sealing ring is provided at the joint of the inner tube connector and the outer tube connecting sleeve.

[0019] It also includes a connection and positioning tube connected and communicated with the inflation inner tube, the connection and positioning tube can pass through the outer tube connection sleeve, and the inner tube connector is sleeved on the connection and positioning tube;

[0020] The inner tube elastic body is sleeved on the connection positioning tube, and the inner tube positioning body is located in the puncture outer tube, and the inner tube elastic body is compressed between the head end of the outer tube connection sleeve and the tail end of the inflatable inner tube.

[0021] The advantages of the present invention are as follows: when the puncture outer tube penetrates the abdominal wall, the inflation inner tube can be immediately locked in the puncture outer tube by connecting the locking mechanism; after the inflation inner tube is locked in the puncture outer tube, the inner tube air outlet at the head of the inflation inner tube is located outside the puncture tip of the puncture outer tube, which can effectively achieve locking between the inflation inner tube and the puncture outer tube after puncture, avoiding damage to the tissues or organs in the abdominal cavity after successful puncture; the invention is easy to use, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the first implementation structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the second implementation structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the third implementation structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the fourth implementation structure of the present invention.

[0026] Figure 5 This is a schematic diagram of the fifth implementation structure of the present invention.

[0027] Figure 6 It is a structural schematic diagram of the penetration indicator of the present invention.

[0028] Explanation of the accompanying drawings: 1-puncture outer tube, 2-inflatable inner tube, 3-inflatable connector, 4-inner tube air outlet, 5-inner tube elastic body, 6-blocking positioning body, 7-connection positioning ring groove, 8-unlocking pressing body, 9-inner tube connector, 10-locking connecting shaft, 11-locking head first connecting rod, 12-locking head, 13-outer tube connecting sleeve, 14-locking connecting sleeve, 15-locking head second connecting rod, 16-locking elastic body, 17-puncture tip, 18-sealing ring, 19-connector installation positioning body, 20-inner tube positioning ring, 21-outer tube positioning ring, 22-air storage bag, 23-air storage bag connecting pipe, 24-elastic body limit block, 25-positioning connector, 26-connection positioning tube, 27-outer tube connecting sleeve positioning head, 28-locking control shell, 29-indicator switch, 30-control shell elastomer, 31-pressing positioning body and 32-indicator connector. DETAILED DESCRIPTION

[0029] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0030] In order to effectively achieve locking between the inflation inner tube 2 and the puncture outer tube 1 after puncture, and avoid damage to the tissue or organs in the abdominal cavity after successful puncture, the present invention includes a puncture outer tube 1 capable of performing abdominal wall puncture and an inflation inner tube 2 capable of filling the abdominal cavity with carbon dioxide gas after puncture, a puncture tip 17 for puncture is arranged at the head end of the puncture outer tube 1, an inner tube air outlet 4 connected to the inflation inner tube 2 is arranged at the head end of the inflation inner tube 2, the inflation inner tube 2 is located in the puncture outer tube 1, and the inflation inner tube 2 can reciprocate in the puncture outer tube 1 along the length direction of the puncture outer tube 1 by using the inner tube elastic body 5;

[0031] It also includes a connection locking mechanism that can lock the inflation inner tube 2 in the puncture outer tube 1. When the locking state between the inflation inner tube 2 and the puncture outer tube 1 by the connection locking mechanism is released, the required puncture operation can be performed using the puncture outer tube 1. While the puncture outer tube 1 penetrates the abdominal wall, the head end of the inflation inner tube 2 pops out of the head end of the puncture outer tube 1, and the inflation inner tube 2 can be immediately locked in the puncture outer tube 1 through the connection locking mechanism. After the inflation inner tube 2 is locked in the puncture outer tube 1, the inner tube air outlet 4 at the head of the inflation inner tube 2 is located in front of the puncture tip 17 of the puncture outer tube 1.

[0032] Specifically, the puncture outer tube 1, the inflation inner tube 2 and the connection locking mechanism are all made of materials that meet medical standards. The puncture tip 17 at the head end of the puncture outer tube 1 can be used to puncture the abdominal wall. The puncture tip 17 can be formed by obliquely cutting the head end of the puncture outer tube 1, that is, the puncture outer tube 1 is wedge-shaped, and the wedge shape can be used to form the puncture tip 17. The inflation inner tube 2 is located inside the puncture outer tube 1, and the inflation inner tube 2 and the puncture outer tube 1 are coaxially distributed. The inflation inner tube 2 and the puncture outer tube 1 are clearance-matched, and the inflation inner tube 2 can reciprocate inside the puncture outer tube 1 through the inner tube elastic body 5.

[0033] During puncture, the inflation inner tube 2 is located inside the puncture outer tube 1, that is, the puncture tip 17 at the head end of the puncture outer tube 1 is exposed, and the required abdominal wall puncture can be performed using the puncture tip 17. After the puncture tip 17 of the puncture outer tube 1 is used to penetrate, it is necessary to use the inflation inner tube 2 to inject carbon dioxide gas into the abdominal cavity. When injecting carbon dioxide gas, it is necessary to make the inner tube outlet 4 of the inflation inner tube 2 exposed, that is, the inner tube elastic body 5 is used to make the inflation inner tube 2 reciprocate inside the puncture outer tube 1 to meet the needs of the entire puncture and inflation.

[0034] In the specific implementation, when the puncture tip 17 of the puncture outer tube 1 penetrates the abdominal wall, there is a possibility of damaging the tissue or organs in the abdominal cavity. Generally, the outer diameter of the puncture outer tube 1 is 2 mm. Since the corresponding diameters of the puncture outer tube 1 and the inflation inner tube 2 are both relatively thin, the prior art cannot completely avoid the damage of the puncture outer tube 1 to the tissue or organs in the abdominal cavity.

[0035] In order to solve the above problems, the present invention uses a connection locking mechanism to lock the inflation inner tube 2 in the puncture outer tube 1. When the inflation inner tube 2 is locked in the puncture outer tube 1, the head end of the inflation inner tube 2 is located outside the puncture tip 17 of the head end of the puncture outer tube 1, and the inner tube air outlet 4 of the inflation inner tube 2 is in an exposed state, and the exposed state means that the puncture outer tube 1 will not block the inner tube air outlet 4 of the inflation inner tube 2, and will not affect the inflation of the abdominal cavity by the inflation inner tube 2 through the inner tube air outlet 4. When the head end of the inflation inner tube 2 is located outside the puncture tip 17 of the head end of the puncture outer tube 1, the head end of the inflation inner tube 2 can prevent the puncture tip 17 from contacting the tissue or organ in the abdominal cavity and causing damage.

[0036] During specific implementation, when the connection locking mechanism fails to lock the inflation inner tube 2 in the puncture outer tube 1, the puncture tip 17 of the puncture outer tube 1 can be used to puncture the abdominal wall. While the puncture outer tube 1 penetrates the abdominal wall, the connection locking mechanism can immediately lock the inflation inner tube 2 in the puncture outer tube 1. After the inflation inner tube 2 is locked in the puncture outer tube 1, the head end of the inflation inner tube 2 can be stabilized outside the puncture tip 17 at the head end of the puncture outer tube 1, and the blunt head of the inflation inner tube 2 can be used to protect the organs or tissues in the abdominal cavity.

[0037] Furthermore, it also includes an inflation connector 3 adapted to be connected to the tail end of the inflation inner tube 2, the inflation connector 3 can be communicated with the inflation inner tube 2, a soft film protective layer is provided at the head end of the inflation inner tube 2, and the shape of the head end of the inflation inner tube 2 includes a spherical shape.

[0038] In the embodiment of the present invention, the inflation connector 3 can be connected to the inflation inner tube 2, and the inflation connector 3 can be connected to an external inflation device. The shape of the head end of the inflation inner tube 2 includes a spherical shape, and of course, other blunt shapes can also be used. Of course, after the soft film protective layer is set at the head end of the inflation inner tube 2, the soft film protective layer can be used to further improve the protection effect. The soft film protective layer can be made of medical flexible materials. Generally, the head end of the inflation inner tube 2 is in a closed state, and the carbon dioxide gas entering the inflation inner tube 2 can only be discharged through the inner tube outlet 4 at the head end of the inflation inner tube 2.

[0039] like Figure 6 As shown, it also includes a penetration indicator that can be adaptably connected to the inflation inner tube 2; the penetration indicator includes an air storage bag 22 for storing gas and an air storage bag connecting tube 23 connected to and communicated with the air storage bag 22, the air storage bag 22 can be communicated with the inflation inner tube 2 through the air storage bag connecting tube 23, after the puncture outer tube 1 penetrates the abdominal wall, the gas in the air storage bag connecting tube 23 can be discharged through the inner tube outlet hole 4 at the head of the inflation inner tube 2.

[0040] In the embodiment of the present invention, one end of the air bag connecting tube 23 is connected to the air bag 22, and the other end of the air bag connecting tube 23 is provided with an indicating connector 32, which can be adapted to be connected with the inflation connector 3 through the indicating connector 32. The air bag 22 can store gas. When gas is stored in the air bag 22, the air bag 22 is in an expanded state, and when the gas in the air bag 22 is reduced or completely released, the air bag 22 is in an empty state. After the puncture outer tube 1 penetrates the abdominal wall, the gas in the air bag 22 can be discharged through the inner tube outlet 4. That is, before the puncture outer tube 1 penetrates the abdominal wall again, the air bag 22 is in an expanded state, and after the puncture outer tube 1 penetrates the abdominal wall, the air bag 22 is in an empty state, so that it can indicate whether the puncture outer tube 1 penetrates the abdominal wall according to the state of the air bag 22. In a specific implementation, an indicator switch 29 can also be provided on the air bag connecting tube 23. The indicator switch 29 can control the connection state between the indicator connector 32 and the air bag 22, so that the gas in the air bag 22 is allowed to enter the inflation inner tube 2 through the air bag connecting tube 23 and the inflation connector 3 only when a penetration indication judgment is required.

[0041] Furthermore, the connection locking mechanism includes an outer tube connection sleeve 13 adapted to be connected to the tail of the puncture outer tube 1 and an inner tube connection body 9 adapted to be connected to the inflation inner tube 2, the inner tube connection body 9 is located in the outer tube connection sleeve 13, the inflation inner tube 2 passes through the outer tube connection sleeve 13 and the puncture outer tube 1, and the head end of the outer tube connection sleeve 13 is fixedly connected to the tail end of the puncture outer tube 1;

[0042] A connection positioning annular groove 7 is provided on the inner tube connector 9, and a locking head 12 which can be embedded in the connection positioning annular groove 7 is provided on the outer tube connector sleeve 13. The locking head 12 can be embedded in the connection positioning annular groove 7 after passing through the outer tube connector sleeve 13. When the locking head 12 is embedded in the connection positioning annular groove 7, the inflatable inner tube 2 can be locked in the puncture outer tube 1;

[0043] It also includes a locking head control mechanism that can control the locking head 12 to be located in an embedded state in the connecting positioning ring groove 7. The locking head 12 can be kept embedded in the connecting positioning ring groove 7 or the locking head 12 can be separated from the connecting positioning ring groove 7 through the locking control mechanism. When the locking head 12 is separated from the connecting positioning ring groove 7 through the locking control mechanism, the locking state of the inflation inner tube 2 and the puncture outer tube 1 can be released.

[0044] In the embodiment of the present invention, the head end of the outer tube connecting sleeve 13 is fixedly connected to the tail end of the puncture outer tube 1, the inner tube connecting head 9 is adaptively connected to the inflatable inner tube 2, the inner tube connector 9 is located in the outer tube connecting sleeve 13, the inner tube connecting head 9 can move synchronously with the inflatable inner tube 2, the outer tube connecting sleeve 13 and the puncture outer tube 1 are coaxially distributed, the inner tube connector 9 and the outer tube connecting sleeve 13 are also coaxially distributed, the inflatable inner tube 2 passes through the outer tube connecting sleeve 13 and the puncture outer tube 1, and the inner tube connector 9 can move in the outer tube connecting sleeve 13 following the inflatable inner tube 2.

[0045] A connecting positioning annular groove 7 is provided on the inner tube connector 9, and the connecting positioning annular groove 7 surrounds the axis of the inner tube connector 9. The shape of the locking head 12 is adapted to the connecting positioning annular groove 7. The locking head 12 passes through the outer tube connecting sleeve 13 and can be embedded in the connecting positioning annular groove 7. The axis of the locking head 12 is perpendicular to the axis of the puncture outer tube 1 and the axis of the inflatable inner tube 2. Therefore, when the locking head 12 is embedded in the connecting positioning annular groove 7, the inflatable inner tube 2 can be locked in the puncture outer tube 1.

[0046] The locking head control mechanism can keep the locking head 12 embedded in the connection positioning ring groove 7 or separate the locking head 12 from the connection positioning ring groove 7, thereby meeting the normal puncture requirements and self-locking protection of the entire Veress needle.

[0047] Below through Figure 1 to Figure 5 , specifically explain the specific structure of the locking head control mechanism and its cooperation with the locking head 12, etc.

[0048] like Figure 1As shown, the locking head control mechanism includes a connecting rod pressing body hinged on the outer wall of the outer tube connecting sleeve 13, and the connecting rod pressing body includes a locking head first connecting rod 11 connected to the locking head 12 and an unlocking pressing body 8 connected to the locking head first connecting rod 11. When the unlocking pressing body 8 is pressed in a direction close to the outer wall of the outer tube connecting sleeve 13, the locking head 12 can be separated from the connecting positioning ring groove 7.

[0049] In the embodiment of the present invention, the first connecting rod 11 of the locking head and the locking head 12 are L-shaped, and the connecting rod pressing body is hinged to the outer tube connecting sleeve 13 through the locking connecting shaft 10. When the unlocking pressing body 8 is pressed toward the outer wall of the outer tube connecting sleeve 13, the locking head 12 can be separated from the connecting positioning ring groove 7 through the first connecting rod 11 of the locking head. After the locking head 12 is separated from the connecting positioning ring groove 7, the inflatable inner tube 2 can move in the puncture outer tube 1, that is, the puncture tip 17 of the puncture outer tube 1 can be used for puncture. Generally, before the locking head 12 is separated from the connecting positioning ring groove 7 and before puncture, the head end of the inflatable inner tube 2 will enter the puncture outer tube 1 to avoid the head end of the inflatable inner tube 2 from blocking the puncture tip 17. After the head end of the inflatable inner tube 2 enters the puncture outer tube 1, the connecting positioning ring groove 7 and the locking head 12 move away from each other. When the puncture outer tube 1 penetrates the abdominal wall with the puncture tip 17, the inner tube elastic body 5 can push the inflatable inner tube 2 to move, so that the head end of the inflatable inner tube 2 is located outside the puncture tip 17 of the puncture outer tube 1. During the movement of the inflatable inner tube 2, the locking head 12 can be embedded in the connection positioning ring groove 7 again to lock the inflatable inner tube 2 in the puncture outer tube 1. When there is no external force pressing the unlocking push body 8, the locking head 12 will continue to be stably embedded in the connection positioning ring groove 7, ensuring that the inflatable inner tube 2 is stably and reliably locked in the puncture outer tube 1.

[0050] In addition, the inner tube connector 9 is sleeved on the inflatable inner tube 2, the inner tube elastomer 5 is sleeved on the inflatable inner tube 2, and the inner tube elastomer 5 is compressed between the inner tube connector 9 and the blocking positioning body 6, the blocking positioning body 6 is assembled in the tail end of the outer tube connecting sleeve 13, and the tail end of the inflatable inner tube 2 passes through the blocking positioning body 6 to the outside of the outer tube connecting sleeve 13.

[0051] In the embodiment of the present invention, the inner tube elastic body 5 can be a spring or other elastic component, the inner tube elastic body 5 is sleeved on the inflatable inner tube 2, the inner tube elastic body 5 is located between the end of the inner tube connector 9 close to the blocking positioning body 6 and the blocking positioning body 6, the blocking positioning body 6 is located at the tail end of the outer tube connecting sleeve 13, the inflatable inner tube 2 and the inner tube elastic body 5 can be positioned by the blocking positioning body 6, the inflatable inner tube 2 passes through the tail end of the outer tube connecting sleeve 13 and is connected to the inflatable connector 3. The locking head 12 is located between the tail end of the outer tube connecting sleeve 13 and the head end of the outer tube connecting sleeve 13. In specific implementation, the shape of the inner tube connector 9 is adapted to the shape of the outer tube connecting sleeve 13. When the locking head 12 is embedded in the connection positioning ring groove 7, the outer tube connecting sleeve 13 and the inner tube connector 9 can also be used to limit the movement of the inner tube connector 9 and the inflatable inner tube 2.

[0052] like Figure 2 , Figure 3 and Figure 4 As shown, the locking head control mechanism includes a locking head second connecting rod 15 connected to the locking head 12, one end of the locking head second connecting rod 15 is connected to the locking head 12, and the other end of the locking head second connecting rod 15 passes through the outside of the locking connecting sleeve 14 protruding from the outer tube connecting sleeve 13; a locking elastomer 16 is also provided in the locking connecting sleeve 14, and the locking elastomer 16 is sleeved on the locking head second connecting rod 15, and the locking elastomer 16 is located between the locking head 12 and the top end in the locking connecting sleeve 14.

[0053] In the embodiment of the present invention, the second connecting rod 15 of the locking head is coaxially distributed with the locking head 12, and the length direction of the locking head 12 is perpendicular to the length direction of the puncture outer tube 1 and the length direction of the inflatable inner tube 2. The locking elastic body 16 can be made of a spring or other elastic components, the locking connecting sleeve 14 is convexly arranged on the outer tube connecting sleeve 13, and the second connecting rod 15 of the locking head passes through the locking connecting sleeve 14, and a space for accommodating the locking elastic body 16 can be formed by the locking connecting sleeve 14.

[0054] During specific implementation, under the action of the locking elastomer 16, the locking head 12 can be stably embedded in the connecting positioning ring groove 7. When it is necessary to contact the locked state, it is necessary to pull the end of the locking head second connecting rod 15 located outside the locking connecting sleeve 14. During the pulling of the locking head second connecting rod 15, the locking elastomer 16 can be in a compressed state. When the locking head 12 is separated from the connecting positioning ring groove 7 and the puncture outer tube 1 is punctured, the head end of the inflatable inner tube 2 enters the puncture outer tube 1. At this time, the connecting positioning ring groove 7 and the locking head 12 are far away from each other. When the puncture outer tube 1 penetrates the abdominal wall, the connecting positioning ring groove 7 is close to the locking head 12, and under the action of the locking elastomer 16, the locking head 12 can be quickly embedded in the connecting positioning ring groove 7 to lock the inflatable inner tube 2 in the puncture outer tube 1. When the second connecting rod 15 of the locking head is pulled to separate the locking head 12 from the connecting positioning ring groove 7, and the head end of the inflatable inner tube 2 enters the puncture outer tube 1, the action loaded on the second connecting rod 15 of the locking head is removed. When the inflatable inner tube 2 moves in the puncture outer tube 1 and the connecting positioning ring groove 7 and the locking head 12 approach each other, the locking head 12 can be locked and embedded in the connecting positioning ring groove 7 by only using the force of the locking elastic body 16.

[0055] for Figure 2 The implementation of the inner tube elastic body 5 and the inflatable inner tube 2 can refer to the above Figure 1 Specific description of the matching between the middle inner tube elastic body 5 and the inflatable inner tube 2.

[0056] for Figure 3 In the implementation, the inner tube connector 9 is connected to the inflatable inner tube 2 in the outer tube connector sleeve 13, and the tail end of the inflatable inner tube 2 is fixedly connected to the inner tube connector 9;

[0057] An inflatable connector 3 is also provided on the outer tube connecting sleeve 13, and the inner tube elastomer 5 is compressed between the inflatable connecting sleeve 3 and the tail end of the inflatable inner tube 2. The inflatable connector 3 is connected to the inflatable inner tube 2 through the inner tube connector 9, and a sealing ring 18 is provided at the joint of the inner tube connector 9 and the outer tube connecting sleeve 13.

[0058] In the embodiment of the present invention, the inflatable connector 13 is installed at the tail end of the outer tube connecting sleeve 13 through the connector installation positioning body 19, and the head end of the outer tube connecting sleeve 13 is provided with an outer tube positioning ring 21 adapted to the puncture outer tube 1. Similarly, the inner tube connector 9 also refers to an inner tube positioning ring 20 adapted to the tail end of the inflatable inner tube 2. The two ends of the inner tube elastic body 5 are connected and matched with the inflatable connector 3 and the inner tube positioning ring 20. The inner tube elastic body 5 can provide a force for the movement of the inflatable inner tube 2, so that when the puncture outer tube 1 penetrates the abdominal wall, the inflatable inner tube 2 can be pushed to move, and the head end of the inflatable inner tube 2 is located outside the puncture tip 17 of the puncture outer tube 1. Of course, in the process of the inner tube elastic body 5 pushing the inflatable inner tube 2, the locking head 12 can be embedded in the connection positioning ring groove 7.

[0059] for Figure 4 The implementation in the embodiment also includes a connection positioning tube 26 connected and communicated with the inflation inner tube 2, wherein the connection positioning tube 26 can penetrate the outer tube connection sleeve 13, and the inner tube connector 9 is sleeved on the connection positioning tube 26;

[0060] The inner tube elastic body 5 is sleeved on the connecting and positioning tube 26 , and the inner tube positioning body 5 is located in the puncturing outer tube 1 , and the inner tube elastic body 5 is compressed between the head end of the outer tube connecting sleeve 13 and the tail end of the inflatable inner tube 2 .

[0061] In the embodiment of the present invention, the inflatable inner tube 2 is connected to the inflatable connector 3 through the connecting positioning tube 26, the connecting positioning tube 26 is coaxially distributed with the inflatable inner tube 2, the head end of the connecting positioning tube 26 is fixedly connected to the tail end of the inflatable inner tube 2 through the positioning connector 25, and an elastic body stopper 24 is also provided outside the tail end of the inflatable inner tube 2. When the head end of the outer tube connecting sleeve 13 cooperates with the puncture outer tube 1, an outer tube connecting sleeve positioning head 27 is formed at the head end of the outer tube connecting sleeve 13, the inner tube elastic body 5 is sleeved on the connecting positioning tube 26, and the inner tube elastic body 5 is located between the outer tube connecting sleeve positioning head 27 and the elastic body stopper 24.

[0062] Of course, the connection positioning tube 26 and the inner tube connector 9 can be integrated with the inflatable inner tube 2, and the specific structure can be selected according to needs. The specific matching process between the inner tube elastic body 5 and the inflatable inner tube 2 can refer to the above description, which will not be repeated here.

[0063] like Figure 5 As shown, the locking head control mechanism includes a locking control shell 28 that can be sleeved on the outer tube connecting sleeve 13 and a control shell elastomer 30 located in the locking control shell 28, the locking head 12 is fixed to the inner wall of the locking control shell 28, and the control shell elastomer 30 is located between the outer wall of the outer tube connecting sleeve 13 and the inner wall of the locking control shell 28; the control shell elastomer 30 corresponds to the locking head 12, and when the locking control shell 28 is pressed so that the control shell elastomer 30 is in a compressed state, the locking head 12 can be separated from the connecting positioning ring groove 7.

[0064] In the embodiment of the present invention, the locking control shell 28 can be sleeved on the outer tube connecting sleeve 13, and the locking head 12 and the control shell elastic body 30 are distributed at two corresponding ends of the locking control shell 28. The control shell elastic body 30 can be made of a spring or other elastic components. Generally, a push positioning body 31 is set on the locking control shell 28, and the push positioning body 31 is on the outer wall of the locking control shell 28 and corresponds to the control shell elastic body 30. When the stabilizing positioning body 31 is pushed to make the locking control shell 28 move, the locking head 12 can be separated from the connecting positioning ring groove 7, and the control shell elastic body 30 can be in a compressed state. It can be seen from the above description that when the locking head 12 is separated from the connecting positioning ring groove 7 and the head end of the inflatable inner tube 2 enters the puncture outer tube 1, the force loaded on the push positioning body 31 can be removed. When the puncture outer tube 1 penetrates the abdominal wall and the connection positioning ring groove 7 and the locking head 12 are close to each other, under the action of the control shell elastomer 30, the locking head 12 can be embedded in the connection positioning ring groove 7 again to achieve the goal of fixing the inflation inner tube 2 in the puncture outer tube 1.

[0065] When the locking head control mechanism adopts the above structure, the specific coordination of the inner tube elastic body 5, the inner tube connector 9 and the inflatable inner tube 2 can refer to the above Figure 1 The process of matching the inner tube elastic body 5 with the inflatable inner tube 2 is described, which will not be repeated here. Of course, in the specific implementation, the locking head control mechanism can also adopt other implementation forms, as long as it can meet the need of controlling the matching between the locking head 12 and the connecting positioning ring groove 7, which will not be listed here one by one.

Claims

1. A self-locking safety type pneumoperitoneum needle, comprising a puncture outer tube (1) capable of performing abdominal wall puncture and an inflation inner tube (2) capable of filling the abdominal cavity after puncture with carbon dioxide gas, the head end of the puncture outer tube (1) being provided with a puncture tip (17) for puncture, the head of the inflation inner tube (2) being provided with an inner tube air outlet (4) connected to the inflation inner tube (2), the inflation inner tube (2) being located inside the puncture outer tube (1), and the inflation inner tube (2) being able to reciprocate inside the puncture outer tube (1) along the length direction of the puncture outer tube (1) by means of an inner tube elastic body (5); the characteristics are: It also includes a connection locking mechanism capable of locking the inflation inner tube (2) in the puncture outer tube (1). When the locking state between the inflation inner tube (2) and the puncture outer tube (1) is released by the connection locking mechanism, the required puncture operation can be performed using the puncture outer tube (1). When the puncture outer tube (1) penetrates the abdominal wall, the head of the inflation inner tube (2) pops out of the head end of the puncture outer tube (1). The inflation inner tube (2) can be immediately locked in the puncture outer tube (1) by the connection locking mechanism. After the inflation inner tube (2) is locked in the puncture outer tube (1), the inner tube air outlet (4) at the head of the inflation inner tube (2) is located in front of the puncture tip (17) of the puncture outer tube (1); It also includes a penetration indicator that can be adapted to be connected to the inflation inner tube (2); the penetration indicator includes an air storage bag (22) for storing gas and an air storage bag connecting tube (23) connected to and in communication with the air storage bag (22); the air storage bag (22) can be in communication with the inflation inner tube (2) via the air storage bag connecting tube (23); after the puncture outer tube (1) penetrates the abdominal wall, the gas in the air storage bag connecting tube (23) can be discharged through the inner tube air outlet (4) at the head of the inflation inner tube (2); The connection locking mechanism comprises an outer tube connection sleeve (13) adapted to be connected to the rear end of the puncture outer tube (1) and an inner tube connection body (9) adapted to be connected to the inflation inner tube (2), the inner tube connection body (9) being located in the outer tube connection sleeve (13), the inflation inner tube (2) passing through the outer tube connection sleeve (13) and the puncture outer tube (1), the head end of the outer tube connection sleeve (13) being fixedly connected to the tail end of the puncture outer tube (1); A connection positioning annular groove (7) is provided on the inner tube connector (9), and a locking head (12) capable of being embedded in the connection positioning annular groove (7) is provided on the outer tube connector sleeve (13). The locking head (12) can be embedded in the connection positioning annular groove (7) after passing through the outer tube connector sleeve (13). When the locking head (12) is embedded in the connection positioning annular groove (7), the inflatable inner tube (2) can be locked in the puncture outer tube (1); It also includes a locking head control mechanism capable of controlling the locking head (12) to be located in an embedded state in the connection positioning ring groove (7); the locking head (12) can be kept embedded in the connection positioning ring groove (7) or the locking head (12) can be separated from the connection positioning ring groove (7) by the locking control mechanism; when the locking head (12) is separated from the connection positioning ring groove (7) by the locking control mechanism, the locking state between the inflation inner tube (2) and the puncture outer tube (1) can be released; It also includes an inflatable connector (3) adapted to be connected to the rear end of the inflatable inner tube (2), the inflatable connector (3) being able to communicate with the inflatable inner tube (2), a soft film protective layer being provided at the head of the inflatable inner tube (2), and a shape of the head of the inflatable inner tube (2) including a spherical shape; The inner tube connector (9) is sleeved on the inflatable inner tube (2), the inner tube elastic body (5) is sleeved on the inflatable inner tube (2), and the inner tube elastic body (5) is compressed between the inner tube connector (9) and the blocking positioning body (6), the blocking positioning body (6) is assembled in the tail end of the outer tube connecting sleeve (13), and the tail end of the inflatable inner tube (2) passes through the blocking positioning body (6) and out of the outer tube connecting sleeve (13); The inner tube connector (9) is connected to the inflatable inner tube (2) in the outer tube connector sleeve (13), and the tail end of the inflatable inner tube (2) is fixedly connected to the inner tube connector (9); An inflatable connector (3) is also provided on the outer tube connection sleeve (13); the inner tube elastic body (5) is compressed between the inflatable connector (3) and the tail end of the inflatable inner tube (2); the inflatable connector (3) is connected to the inflatable inner tube (2) through the inner tube connection body (9); a sealing ring (18) is provided at the joint between the inner tube connection body (9) and the outer tube connection sleeve (13); It also includes a connection positioning tube (26) connected to and in communication with the inflation inner tube (2), the connection positioning tube (26) being capable of penetrating the outer tube connection sleeve (13), and the inner tube connector (9) being sleeved on the connection positioning tube (26); The inner tube elastic body (5) is sleeved on the connection positioning tube (26), and the inner tube elastic body (5) is located inside the puncture outer tube (1), and the inner tube elastic body (5) is compressed between the head end of the outer tube connection sleeve (13) and the tail end of the inflation inner tube (2).

2. The self-locking safety Veress needle according to claim 1 is characterized in that: The locking head control mechanism comprises a connecting rod pressing body hinged on the outer wall of the outer tube connecting sleeve (13), the connecting rod pressing body comprising a locking head first connecting rod (11) connected to the locking head (12) and an unlocking pressing body (8) connected to the locking head first connecting rod (11), and when the unlocking pressing body (8) is pressed in a direction close to the outer wall of the outer tube connecting sleeve (13), the locking head (12) can be separated from the connecting positioning ring groove (7).

3. The self-locking safety Veress needle according to claim 1 is characterized in that: The locking head control mechanism comprises a locking head second connecting rod (15) connected to the locking head (12), one end of the locking head second connecting rod (15) being connected to the locking head (12), and the other end of the locking head second connecting rod (15) passing through the outside of a locking connection sleeve (14) protruding from the outer tube connection sleeve (13); a locking elastic body (16) is further provided in the locking connection sleeve (14), the locking elastic body (16) being sleeved on the locking head second connecting rod (15), and the locking elastic body (16) being located between the locking head (12) and the top end in the locking connection sleeve (14).

4. The self-locking safety Veress needle according to claim 1 is characterized in that: The locking head control mechanism comprises a locking control shell (28) that can be sleeved on the outer tube connecting sleeve (13) and a control shell elastic body (30) located in the locking control shell (28); the locking head (12) is fixed to the inner wall of the locking control shell (28); the control shell elastic body (30) is located between the outer wall of the outer tube connecting sleeve (13) and the inner wall of the locking control shell (28); the control shell elastic body (30) and the locking head (12) are exactly corresponding to each other; when the locking control shell (28) is pressed so that the control shell elastic body (30) is in a compressed state, the locking head (12) can be separated from the connecting positioning ring groove (7).

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