A pneumatic self-locking puncture device

Abstract

The present invention discloses a pneumatic self-locking puncture device, which includes a main body and a cannula, and the main body is movably connected to the cannula; the main body includes a main body housing, an air inlet joint, and an inner housing, a core cavity, a mesh sleeve and an inner sleeve provided inside the main body housing; the core cavity is sleeved inside the inner housing, the mesh sleeve is connected to the core cavity, and the inner sleeve is snap-fitted inside the mesh sleeve; an air inlet is provided on the main body housing, and the air inlet joint is connected to the air inlet; a groove is provided on the mesh sleeve, and a plurality of through holes radially penetrating the mesh sleeve are provided in the groove, and a sealing structure or a seal is provided between the mesh sleeve and the main body housing to form an air flow channel between the air inlet joint, the main body housing, the mesh sleeve and the inner sleeve. The air flow channel of the present invention introduces gas into the core cavity, and the gas forms pneumatic self-locking in the core cavity to prevent the internal and external air pressures at the puncture site of the human body from being unbalanced.

Description

Technical Field

[0001] The present invention relates to the field of minimally invasive surgical instruments, and particularly to a pneumatic self-locking trocar. Background Art

[0002] Currently, in surgical operations, a minimally invasive surgical instrument - a trocar is used to replace a scalpel to make an opening in the human body, and then various medical instruments that can pass through the trocar are used for surgical procedures such as in-vivo examination, tissue cauterization, and resection. This surgical method can reduce the wound of the wounded, reduce pain, shorten the time of bed rest and postoperative recuperation, and reduce the scar after recovery. Since the wounds of these surgeries are small and the recovery is fast, they are called minimally invasive surgeries.

[0003] The cannula of the trocar is left in the human body, and medical instruments pass through the trocar to perform in-vivo surgical operations. To ensure the safety of the patient during the operation, it is necessary to prevent the imbalance of air pressure inside and outside the puncture site of the human body when the trocar is left in the human body. Therefore, the sealing performance of the trocar is very important. In the existing trocar, a movable seal is often arranged in the inner cavity. The movable seal is mainly composed of a plurality of mechanically overlapping elastic sheets to form a sealing component, and is suitable for forming a seal with the surgical instrument inserted into the trocar. However, such a seal will affect the flexibility of the surgical instrument on the one hand when the mechanical elastic sheet contacts the surgical instrument, and on the other hand, some tissue residues generated when the surgical instrument is removed through the trocar will remain on the mechanical elastic sheet, causing contamination and blockage. Summary of the Invention

[0004] To overcome the defects of the above-mentioned prior art, the present invention provides a pneumatic self-locking trocar.

[0005] The technical solution adopted by the present invention to solve its problems is:

[0006] A pneumatic self-locking trocar, comprising a main body and a cannula, the main body is movably connected to the cannula;

[0007] The main body includes a main body housing, an air inlet joint, and an inner housing, a core cavity, a mesh sleeve, and an inner sleeve arranged inside the main body housing; the core cavity is sleeved inside the inner housing, the mesh sleeve is connected to the core cavity, and the inner sleeve is clamped inside the mesh sleeve; an air inlet is provided on the main body housing, and the air inlet joint is connected to the air inlet;

[0008] The mesh sleeve is provided with grooves, and a plurality of through holes radially penetrating the mesh sleeve are arranged in the grooves. A sealing structure or a sealing member is provided between the mesh sleeve and the main body housing to form an air flow channel between the air inlet joint, the main body housing, the mesh sleeve, and the inner sleeve.

[0009] The pneumatic self-locking puncture device provided by the present invention has an air flow channel for introducing gas into the core cavity. The gas forms pneumatic self-locking in the core cavity. If the air pressure in the puncture site of the human body is too low, the gas introduced into the core cavity is supplemented into the human body. If the air pressure in the puncture site of the human body is too high, the gas in the human body and the core cavity is discharged into the atmosphere along the channel of the inner sleeve, thereby avoiding the imbalance of air pressure inside and outside the puncture site of the human body.

[0010] Further, anti-slip sealing grooves for preventing the sealing structure or seal from slipping are provided on the mesh sleeve.

[0011] Further, a plurality of flexible diaphragms are provided in the core cavity. The plurality of flexible diaphragms are circumferentially and uniformly arranged in the shell of the core cavity, and a through hole is jointly formed in the center of the surrounding.

[0012] Thus, the flexible diaphragms do not affect the flexibility of the surgical instrument and are beneficial to the formation of pneumatic self-locking by the retained gas; the surgical instrument passes through the through hole in the core cavity without resistance and can easily take out tissue residues without causing blockage.

[0013] Further, a step is provided in the mesh sleeve to form a sealing position at the connection between the mesh sleeve and the inner sleeve and clamp the inner sleeve.

[0014] Further, the sleeve includes an outer tube and an inner tube. The outer tube is sleeved on the inner tube, and between the outer tube and the inner tube.

[0015] Further, the outer tube includes a clamping member for preventing the main body from enlarging the puncture opening during deep puncture, a straight tube, and a tube cap for clamping the inner tube; one end of the straight tube is connected to the clamping member, and the other end is connected to the tube cap.

[0016] Further, an inclined hole penetrating the tube cap and the inner tube is provided on the sleeve. The clamping member is connected to the main body housing, and the inner tube is connected to the inner housing, so as to form a gas circuit between the inner tube, the inclined hole, the hollow structure between the outer tube and the inner tube, the gap between the main body housing and the inner housing, and the core cavity.

[0017] Thus, a gas circuit is formed between the main body and the sleeve, which is beneficial to maintaining the air pressure balance by the gas flow in the core cavity when the air pressure in the puncture site of the human body is imbalanced.

[0018] Further, the main body further includes an end cap connected to the main body housing and a sound-absorbing end penetrating the end cap. The sound-absorbing end is axially provided with an operation channel.

[0019] Further, a pneumatic sensor for detecting air pressure changes is further included.

[0020] Further, a control device for receiving the detection data of the pneumatic sensor is further included.

[0021] In summary, a pneumatic self-locking puncture device of the present invention has the following technical effects:

[0022] 1) The gas flow channel allows gas to enter the core cavity, where the gas forms a pneumatic self-locking mechanism. If the air pressure in the puncture site of the human body is too low, the gas introduced into the core cavity is supplemented into the human body. If the air pressure in the puncture site of the human body is too high, the gas in the human body and the core cavity is discharged into the atmosphere along the channel of the inner sleeve, thereby avoiding the imbalance of air pressure inside and outside the puncture site of the human body.

[0023] 2) The flexible diaphragm does not affect the flexibility of the surgical instrument and is conducive to the formation of a pneumatic self-locking mechanism by retaining gas; the surgical instrument passes through the through-hole in the core cavity without resistance and can easily remove tissue residues without causing blockage.

[0024] 3) The gas circuit is formed between the main body and the sleeve, which is conducive to maintaining the air pressure balance when the air pressure in the puncture site of the human body is out of balance, and the gas in the core cavity flows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an exploded structural view of the pneumatic self-locking puncture device of the present invention;

[0026] Figure 2 is a cross-sectional structural view of the pneumatic self-locking puncture device of the present invention;

[0027] Figure 3 is Figure 2 an enlarged view of part A in

[0028] Figure 4 is Figure 2 an enlarged view of part B in

[0029] Description of the reference numerals:

[0030] 1. Main body; 11. Main body housing; 12. Air inlet joint; 13. Inner housing; 14. Core cavity; 141. Flexible diaphragm; 15. Mesh sleeve; 151. Groove; 152. Through hole; 153. Anti-slip sealing groove; 16. Inner sleeve; 17. Sealing structure or seal; 18. End cap; 19. Muffling end; 2. Sleeve; 21. Outer tube; 211. Clamping pipe fitting; 212. Straight pipe; 213. Pipe cap; 22. Inner tube. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0034] As Figures 1-3 shown, the present invention provides a pneumatic self-locking puncture device, which includes a main body 1 and a cannula 2 for piercing into the patient's body and staying therein. The main body 1 is movably connected to the cannula 2. The main body 1 includes a main body housing 11, an air inlet joint 12, and an inner housing 13, a core cavity 14, a mesh sleeve 15, and an inner sleeve 16 provided inside the main body housing 11. The core cavity 14 is sleeved inside the inner housing 13. The mesh sleeve 15 is connected to the core cavity 14. The inner sleeve 16 is snap-fitted inside the mesh sleeve 15. An air inlet is provided on the main body housing 11, and the air inlet joint 12 is connected to the air inlet. A groove 151 is provided on the mesh sleeve 15, and a plurality of through holes 152 radially penetrating the mesh sleeve 15 are provided in the groove 151. A sealing structure or seal 17 is provided between the mesh sleeve 15 and the main body housing 11 to form an air flow channel between the air inlet joint 12, the main body housing 11, the mesh sleeve 15, and the inner sleeve 16. The direction of the gas entering the core cavity 14 through the air flow channel is opposite to the direction of the gas discharged from the core cavity 14 through the inner sleeve 16. If the air pressure in the human body is too low, the impact force of the gas entering the core cavity 14 from the air inlet channel and flowing towards the human body will be greater than the impact force of the gas discharged from the core cavity 14 through the inner sleeve 16. At this time, the missing gas in the human body can be supplemented to increase the air pressure in the human body. If the air pressure in the human body is too high, the impact force of the gas entering the core cavity 14 from the air inlet channel and flowing towards the human body will be less than the impact force of the gas discharged from the core cavity 14 through the inner sleeve 16. At this time, the gas is discharged from the human body and the core cavity 14 to the outside to reduce the air pressure in the human body. A step is provided inside the mesh sleeve 15 to form a sealing position at the connection between the mesh sleeve 15 and the inner sleeve 16 and clamp the inner sleeve 16 tightly.

[0035] Specifically, an anti-slip sealing groove 153 for preventing the sealing structure or the seal 17 from slipping is provided on the mesh sleeve 15. A plurality of flexible diaphragms 141 are provided in the core cavity 14. The plurality of flexible diaphragms 141 are circumferentially and uniformly arranged in the shell of the core cavity 14, and a through port is commonly formed at the center of the surrounding. The flexible diaphragms 141 do not affect the flexibility of the surgical instrument and are conducive to retaining gas to form a pneumatic self-locking. The surgical instrument passes through the through port in the core cavity 14 without resistance and can easily take out tissue residues without causing blockage.

[0036] In this embodiment, the sleeve 2 includes an outer tube 21 and an inner tube 22. The outer tube 21 is sleeved on the inner tube 22, and there is a space between the outer tube 21 and the inner tube 22. The outer tube 21 includes a clamping pipe fitting 211 for preventing the main body 1 from enlarging the puncture opening during deep puncture, a straight pipe 212, and a pipe cap 213 for clamping the inner tube 22. One end of the straight pipe 212 is connected to the clamping pipe fitting 211, and the other end is connected to the pipe cap 213. An inclined hole penetrating through the pipe cap 213 and the inner tube 22 is provided on the sleeve 2. The clamping pipe fitting 211 is connected to the main body shell 11, and the inner tube 22 is connected to the inner shell 13, so that the main body 1 and the sleeve 2 form an integral body, and a gas circuit is formed among the inner tube 22, the inclined hole, the hollow structure between the outer tube 21 and the inner tube 22, the gap between the main body shell 11 and the inner shell 13, and the core cavity 14. This gas circuit is conducive to the gas flow in the core cavity 14.

[0037] In addition, the main body 1 further includes an end cap 18 connected to the main body shell 11 and a noise reduction end head 19 penetrating through the end cap 18. The noise reduction end head 19 is axially provided with an operation channel. This operation channel is a channel through which surgical instruments can enter and exit for operation. The noise reduction end head 19 can eliminate the noise generated during gas flow and avoid the noise during the operation from affecting the surgical staff or the patient.

[0038] In this embodiment, a pneumatic sensor for detecting air pressure changes is further included. The pneumatic sensor is arranged in the inner shell 13 and close to the inner tube 22. A control device for receiving the detection data of the pneumatic sensor is also included. The control device can control the gas supply state of the gas supply device.

[0039] When the present invention is in use, the air inlet joint 12 is connected to the air delivery pipe of the air supply device. Before puncture, the control device controls the air supply device to ventilate the puncture device first; the inner tube 22 penetrates through the outer epidermis, and the cannula 2 is punctured on the human body and fixed according to the actual situation. At this time, the puncture site of the human body is connected inside and outside. Without restriction, the gas in the body will leak into the atmosphere, causing damage to the patient's body and affecting the progress of the operation. The air supply device passes the gas into the core cavity 14 through the air flow channel formed in the main body 1 of the puncture device. The gas forms a pneumatic self-locking in the core cavity 14, that is, the change of the air pressure is detected by the air pressure sensor. If the air pressure in the puncture site of the human body is too low, the gas introduced into the core cavity 14 is supplemented into the human body. If the air pressure in the puncture site of the human body is too high, the gas in the human body and the core cavity 14 are both discharged into the atmosphere along the channel of the inner sleeve 16, so as to avoid the imbalance of the air pressure inside and outside the puncture site of the human body. The gas circuit formed between the main body 1 and the cannula 2 is beneficial to the gas flow in the core cavity 14 and facilitates the adjustment of the air pressure imbalance. The puncture device is provided with a channel for the surgical instrument to pass through. There is no resistance for the surgical instrument to enter and exit the puncture device, and the flexibility will not be affected. Moreover, the tissue residue can be easily taken out through the puncture device without causing blockage.

[0040] In summary, a pneumatic self-locking puncture device of the present invention has the following technical effects:

[0041] (1) The air flow channel passes the gas into the core cavity 14, and the gas forms a pneumatic self-locking in the core cavity 14. If the air pressure in the puncture site of the human body is too low, the gas introduced into the core cavity 14 is supplemented into the human body. If the air pressure in the puncture site of the human body is too high, the gas in the human body and the core cavity 14 are both discharged into the atmosphere along the channel of the inner sleeve 16, so as to avoid the imbalance of the air pressure inside and outside the puncture site of the human body.

[0042] (2) The flexible diaphragm 141 does not affect the flexibility of the surgical instrument and is beneficial to retaining the gas to form a pneumatic self-locking; there is no resistance for the surgical instrument to pass through the through hole in the core cavity 14, and the tissue residue can be easily taken out without causing blockage.

[0043] (3) The gas circuit is formed between the main body 1 and the cannula 2, which is beneficial to maintaining the air pressure balance by the gas flow in the core cavity 14 when the air pressure in the puncture site of the human body is out of balance.

[0044] The technical means disclosed in the solution of the present invention are not limited to the technical means disclosed in the above embodiments, but also include the technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and retouches can be made, and these improvements and retouches are also regarded as the protection scope of the present invention.

Claims

1. A pneumatic self-locking puncture device, characterized in that, It includes a main body (1) and a sleeve (2), and the main body (1) is movably connected to the sleeve (2); The main body (1) includes a main body housing (11), an air inlet joint (12), and an inner housing (13), a core cavity (14), a mesh sleeve (15) and an inner sleeve (16) provided inside the main body housing (11); the core cavity (14) is sleeved inside the inner housing (13), the mesh sleeve (15) is connected to the core cavity (14), and the inner sleeve (16) is snap-fitted inside the mesh sleeve (15); an air inlet is provided on the main body housing (11), and the air inlet joint (12) is connected to the air inlet; A plurality of flexible diaphragms (141) are provided inside the core cavity (14), and the plurality of flexible diaphragms (141) are circumferentially and uniformly arranged inside the housing of the core cavity (14), and a through port is jointly formed at the center of the surrounding; A groove (151) is provided on the mesh sleeve (15), and a plurality of through holes (152) radially penetrating the mesh sleeve (15) are provided inside the groove (151), and a sealing structure or a seal (17) is provided between the mesh sleeve (15) and the main body housing (11) so as to form an air flow channel between the air inlet joint (12), the main body housing (11), the mesh sleeve (15) and the inner sleeve (16); The sleeve (2) includes an outer tube (21) and an inner tube (22), the outer tube (21) is sleeved on the inner tube (22), and a hollow structure is formed between the outer tube (21) and the inner tube (22); The outer tube (21) includes a clamping pipe fitting (211) for preventing the main body (1) from expanding the puncture opening during deep puncture, a straight pipe (212) and a pipe cap (213) for clamping the inner tube (22); One end of the straight pipe (212) is connected to the clamping pipe fitting (211), and the other end is connected to the pipe cap (213); an inclined hole penetrating the pipe cap (213) and the inner tube (22) is provided on the sleeve (2), the clamping pipe fitting (211) is connected to the main body housing (11), and the inner tube (22) is connected to the inner housing (13) so as to form a gas circuit between the inner tube (22), the inclined hole, the hollow structure between the outer tube (21) and the inner tube (22), the gap between the main body housing (11) and the inner housing (13), and the core cavity (14).

2. The pneumatic self-locking puncture device according to claim 1, wherein An anti-slip sealing groove (153) for preventing the sealing structure or the seal (17) from slipping is provided on the mesh sleeve (15).

3. The air pressure self-locking puncture device according to claim 1, wherein, A step is provided inside the mesh sleeve (15) so as to form a sealing position at the connection between the mesh sleeve (15) and the inner sleeve (16) and clamp the inner sleeve (16).

4. The air pressure self-locking puncture device according to claim 1, wherein The main body (1) further includes an end cap (18) connected to the main body housing (11) and a sound-absorbing end head (19) arranged through the end cap (18), and an operation channel is axially provided in the sound-absorbing end head (19).

5. The air pressure self-locking puncture device according to claim 1, wherein, It further includes a barometric pressure sensor for detecting barometric pressure changes.

6. The pneumatic self-locking puncture device according to claim 5, wherein It further includes a control device for receiving the detection data of the barometric pressure sensor.

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