WO2020125029A1

WO2020125029A1 - Puncture device

Info

Publication number: WO2020125029A1
Application number: PCT/CN2019/100437
Authority: WO
Inventors: 朱健; 刘国宁; 高俊
Original assignee: 江苏人冠医疗科技有限公司
Priority date: 2018-12-17
Filing date: 2019-08-13
Publication date: 2020-06-25
Also published as: CN109498122B; CN109498122A

Abstract

A puncture device comprises a puncture rod (1) for causing a perforation, a sheath assembly (2) sleeved on the outer side of the puncture rod (1) as a surgical channel, and an exhaust vent (211), wherein the sheath assembly (2) comprises an inner tube (22) and an outer tube (21) sleeved on the outer side of the inner tube (22) to form an interlayer, the thiner end of the inner tube (22) is provided with an opening (221), a smoke exhaust passage (23) is arranged in the interlayer and communicates the opening (221) with the exhaust vent (211). Smoke is discharged out of the surgical space at the same time when air enters the surgical space, so that the lens blur caused by the smoke can be eliminated to avoid affecting the sight of medical staff, and improve the surgical efficiency. Meanwhile, the airbag sealing structure has an ingenious design with reliable sealing for surgical instruments of different sizes, and the product is safe in clinical use.

Description

A puncture device

Technical field

The invention relates to the medical field, in particular to a puncture device.

Background technique

Disposable puncture device is an important instrument in laparoscopic surgery. It is a matching surgical instrument for thoracic cavity and laparoscopic surgery. It is suitable for thoracic cavity and laparoscopic surgery and an instrument for establishing a working channel for thoracic cavity and abdominal cavity during surgery . With the development of imaging technology and camera technology, the minimally invasive surgical methods represented by laparoscopic surgery have developed rapidly in recent years, especially in gynecology, general surgery and other operations involving the abdominal cavity, are gradually changing from open to intracavity Minimally invasive surgery. In laparoscopic surgery, 2 to 5 puncture holes are generally used. One is used to place the laparoscope, and the remaining holes are used to place surgical instruments. The outer diameter of the surgical instruments is roughly divided into 5mm, 10mm, 12mm, and 15mm. A matching inner diameter puncture cannula is provided to avoid leakage of pneumoperitoneum and affect the operation.

In clinical medicine, the electrocautery in the puncture device will inevitably produce a large amount of smoke and water vapor when burning or coagulating human tissue. The smoke generated by the burning of this organic matter is a strong carcinogen and will affect the operator and Medical personnel in the operating room cause unnecessary injuries, and when performing deep surgery on the human body, especially when scorching deep blood vessels and other important organs, the smoke will blur the electron microscope inside, affecting the medical staff's sight, causing difficulty in hemostasis, even The operation is blind or busy, so a smoke removal device is needed to ensure the smooth operation of the operation.

Summary of the invention

In view of the above defects in the prior art, the main purpose of the present invention is to overcome the shortcomings of the prior art, and discloses a puncture device, which includes a puncture rod for causing a penetration hole and a sleeve that is set outside the puncture rod as a surgery The sheath tube assembly of the channel further includes an exhaust port, the sheath tube assembly includes an inner tube and an outer tube, the outer tube is sleeved on the outer side of the inner tube to form an interlayer, and the thin end of the inner tube is provided with an opening, and A smoke exhaust channel is provided in the interlayer, and the smoke exhaust channel communicates the opening with the exhaust port.

Further, it also includes an air inlet and an air inlet channel, an air outlet is provided at the thin end of the outer tube, and the air inlet channel communicates the air inlet with the air outlet.

Further, the thin end of the outer tube is uniformly provided with at least one elongated air outlet extending from the center of the thin end of the outer tube to the outer periphery.

Further, it also includes two baffles, the baffles are disposed in the interlayer, and the interlayer is divided into the air intake channel and the smoke exhaust channel.

Further, a seal for opening and closing the surgical channel is also included.

Further, the sealing member includes a deformable body made of a flexible material, a gas inlet and outlet channel is provided on the deformable body, and the gas inlet and outlet channels are respectively connected to the air inlet and the air outlet through a valve, And the deformation body is provided with a through hole, and the center of the through hole is on the same straight line as the central axis of the inner tube; when the intake air is in, the deformation body expands to shrink the through hole; when exhausting, The deformable body contracts and the through hole expands.

Further, the deformable body is provided separately and is composed of at least two parts.

Further, the deformable body has a ring shape, and the through hole is provided at the center of the deformable body.

Further, a guide frame for restricting and guiding expansion of the deformable body toward the center of the through hole is provided around the deformable body.

Further, the flexible material is one of rubber, plastic, thermoplastic elastomer and fabric with a sealing layer.

The beneficial effects achieved by the present invention:

By setting the opening at the thin end of the sheath assembly, the opening is placed near the surgical instrument, and the opening is small. Therefore, the suction force at the opening is large, and the smoke near the surgical instrument can be quickly sucked away to maintain a clear view of the operating area; Moreover, a plurality of crescent-shaped air outlets are evenly arranged. Similarly, the elongated air outlet accelerates the gas injection speed, and the gas can be injected farther, reducing the interference with the air flow of the smoke exhaust port, and achieving the circulation of gas in the abdominal cavity. By providing a seal, and the main body of the seal is a deformable body supported by a flexible material, the adaptability is strong, the through hole can be adjusted according to the size of the surgical instrument, and the sealing performance is reliable, and the product is safe for clinical use. In addition, it is used in conjunction with the guide frame to ensure that the deformable body expands toward the center of the through hole, so that the deformable body closely fits the surgical instrument, which greatly improves the tightness; through the gas inlet and outlet channels, the gas inside the deformable body is controlled to pass the The hole is contracted until it is sealed, and the through hole can also be expanded to facilitate the replacement of surgical instruments and the removal of tissue excisions.

BRIEF DESCRIPTION

1 is a perspective view of a puncture device of the present invention;

2 is a plan view of the structure of the sheath assembly;

Figure 3 is a right side view of the sheath assembly;

4 is a cross-sectional view of L-L in FIG. 3;

5 is a cross-sectional view of B-B in FIG. 2;

6 is a cross-sectional view of C-C in FIG. 2;

7 is a cross-sectional view of Q-Q in FIG. 3;

Figure 8 is a schematic diagram of the structure of the seal;

Figure 9 is a schematic diagram of the installation of the guide frame;

Figure 10 is a top view of the guide frame;

11 is a cross-sectional view of B-B in FIG. 10;

12 is a schematic structural view of another deformable body;

13 is a cross-sectional view of M-M in FIG. 3;

14 is a cross-sectional view of O-O in FIG. 3;

15 is a cross-sectional view of P-P in FIG. 3;

Figure 16 is a schematic diagram of duckbill valve installation;

The reference signs are as follows:

1. Puncture rod, 2. Sheath tube assembly, 3. Seals, 11. Duckbill valve, 21, outer tube, 22, inner tube, 23, smoke exhaust channel, 24, air intake channel, 25, partition, 26 , Through hole, 31, deformable body, 32, gas inlet and outlet channels, 33, guide frame, 34, fixed side, 35, intake valve, 36, exhaust valve, 41, first channel, 42, second channel, 43 , Third channel, 211, exhaust port, 212, air inlet, 213, air outlet, 221, opening, 311, through hole, 331, guide plate, 332, support plate, 333, positioning column, 334, positioning hole , 341, fixing holes.

detailed description

In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

A puncture device according to the present invention, as shown in FIGS. 1-7, includes a puncture rod 1 for creating a penetration port and a sheath tube assembly 2 sleeved on the outside of the puncture rod 1 as a surgical channel. The sheath tube assembly 2 includes external The tube 21 and the inner tube 22, the outer tube 21 is sleeved with the outer side of the inner tube 22, and the thin ends of the outer tube 21 and the inner tube 22 are connected together to form an interlayer; it is conceivable that in order to make the sheath tube assembly 2 convenient Inserted into the abdominal cavity, the thin end of the outer tube 21 gradually gathers from the top to the center. The head of the outer tube 21 is also provided with an exhaust port 211 for exhaust. A smoke exhaust channel 23 is provided in the interlayer, and an opening 221 is provided at the thin end of the inner tube 22, and the exhaust port 211 is communicated with the opening 221 through the smoke exhaust channel. Wherein, the interlayer can be directly used as the smoke exhaust channel 23 to connect the exhaust port 211 and the buckle 221; a pipeline can also be additionally provided as the smoke exhaust channel 23 in the interlayer, and the interlayer can be used as the protective sleeve of the pipeline.

In an embodiment, it further includes an air inlet 212 and an air inlet channel 24. The air inlet 212 is provided at the head of the outer tube 21, and an air outlet 213 is provided at the thin end of the outer tube 21. The port 212 communicates with the air outlet 213; that is, the gas enters the air intake passage 24 through the air inlet 212, and then is discharged from the air outlet 213.

In a preferred embodiment, the air outlet 213 is of an elongated structure and has a crescent shape. At least one air outlet 213 is provided at the thin end of the outer tube 21 extending from the center of the thin end of the outer tube 21 to the outer periphery. The slender outlet can accelerate the speed of gas injection, so that the gas can be sprayed farther, and reduce the interference to the air flow of the smoke exhaust port. Preferably, a plurality of gas outlets 213 are evenly arranged around the thin end of the outer tube 21 so that gas can be sprayed into place at various angles.

In a preferred embodiment, as shown in FIGS. 3-4, two partitions 25 are provided vertically in the interlayer of the outer tube 21 and the inner tube 22 to divide the interlayer into an intake channel 24 and a smoke exhaust channel 23, opening 221 between the two partitions 25 of the smoke exhaust channel.

By setting the opening 221 at the thin end of the sheath assembly 2, the opening is located near the surgical instrument, and the opening 221 is small, therefore, the suction force at the opening 211 is large, and the smoke near the surgical instrument can be quickly sucked away to maintain the operation The field of view is clear; and multiple crescent-shaped air outlets 213 are evenly arranged. Similarly, the elongated air outlet 213 accelerates the gas injection speed, and the gas can be injected farther. If the air outlet 213 is set too large, the gas injection speed is slow, and can only be sprayed near the air outlet 213, and the suction force at the opening 221 is large. The gas just ejected from the air outlet 213 is immediately discharged by the opening 221, which greatly reduces the smoke exhaust effect.

In one embodiment, a seal 3 for opening and closing the surgical channel is also included. The seal 3 is provided at the head of the inner tube 22. When the surgical instrument is in the operation room, the seal 3 closely fits the surgical instrument to achieve The effect of sealing; when the surgical instruments and tissue shears are taken out, the sealing member 3 is opened to facilitate its removal, and after the removal, the sealing member 3 is sealed again to partition the surgical channel.

Among them, as shown in FIGS. 5 and 8-12, the sealing member 3 includes a deformable body 31 made of a flexible material, and a gas inlet and outlet channel 32 is provided on the deformable body, which expands or contracts by inflating or exhausting the deformable body; The inlet and outlet channels 32 can be opened and closed by the intake valve 35 and the exhaust valve 36, thereby achieving the intake and exhaust functions. Of course, it can be easily understood that only one air hole is provided on the deformable body 31, and the air hole is compatible with the air intake and exhaust functions. The air hole is externally connected to two valves, and the air intake and exhaust functions are realized by valve control. It is also possible to set two air holes independently to achieve exhaust and intake.

The deformable body 31 is provided with a through hole 311 through which surgical instruments enter the abdominal cavity. The center of the through hole 311 is on the same straight line as the central axis of the inner tube 22; when the intake valve 35 opens, the gas enters the deformable body, the deformable body expands, shrinks the through hole 311, and wraps the surgical instrument to achieve the sealing function; No surgical instrument is placed in the hole 311, the interior of the deformable body is inflated, and the through hole 311 is contracted until it is closed. When the inlet port is closed, the exhaust valve 36 is opened, and the gas inside the deformed body is discharged, the deformed body contracts and the through hole 311 expands, so that the surgical instrument can be easily taken out; in addition, the gas in the deformed body is carried out through the gas inlet and outlet channels 32 Pumping, because the deformable body is made of a flexible material, the through hole 311 expands toward the periphery of the deformable body, and the diameter of the through hole 311 is opened to the maximum, which does not affect the placement and removal of surgical instruments. The cross section of the deformable body 31 is a symmetrical vertebral structure. It is conducive to the contraction of the through hole 311.

In an embodiment, the deformable body 31 is provided separately, and is composed of at least two parts. The deformable body 31 is formed by joining two parts; this can improve the tightness of the through hole 311. When the deformable body 31 is infinitely divided into several parts around the center of the through hole 311, it is conceivable that when each part is inflated, each part expands toward the center of the circle, and a better sealing effect can be achieved. In addition, when the deformable body 31 is a split structure, as shown in FIG. 12, the cross-section of the deformable body 31 is a vertebral structure, because the deformable body is composed of two parts, and the connecting seam is equivalent to the through hole 311 through which the surgical instrument passes Therefore, no additional through hole 311 is required, and the sealing effect can be satisfied.

In an embodiment, the deformable body 31 has a ring shape, and the through hole 311 is provided in the center of the deformable body 31. In this way, the deformable body 31 and the through hole 311 are concentric circles, which ensures that the deformable body 31 receives uniform force when inflated, avoids excessive expansion of some positions, causes the deformable body 31 to expand and deform, and affects the tightness of the through hole 311.

In an embodiment, the flexible material is rubber, and the rubber is a highly elastic polymer compound, which has elasticity and good sealing performance. When inflated, it can be closely attached to surgical instruments. Of course, the flexible material can also be plastic, thermoplastic elastomer or fabric with a sealing layer.

In an embodiment, as shown in FIGS. 9-11, in order to prevent the deformable body 31 from expanding in both up and down directions when inflated, causing waste of gas, and the deformation efficiency of the deformable body 31 is low, the squeezing force is dispersed, and the The sealing effect of the hole 311 is greatly reduced. Therefore, a guide frame 33 for restricting and guiding the expansion of the deformable body 31 toward the center of the through hole 311 is provided around the deformable body 31. The guide frame 33 includes a guide plate 331 and a support plate 332. The guide plate 331 is mounted on the support plate 332 and has a cross-sectional shape of "concave". The deformable body 31 is disposed between the guide plate 331 and the support plate 332 In the concave-shaped groove, the deformation body 31 is restricted from expanding upward and downward, so that it expands and deforms toward the center of the through hole 3. In a specific embodiment, a plurality of positioning posts 333 are provided on the contact surface of the guide plate 331 and the support plate 332, and positioning holes 334 matching the fixed positions 511 are provided at corresponding positions of the support plate 332. The plate 332 can be firmly connected together, and the positioning hole 334 and the positioning post 333 have an interference fit. In addition, in order to facilitate the installation of the guide frame 33 in the puncture device, the positioning post 333 protrudes from the positioning hole 334 to fix the protruding portion with the puncture device. It is possible to avoid setting more installation parts.

Based on the above embodiment, a fixed edge 34 is provided on the periphery of the deformable body 31. The fixed edge 34 is fixed to the guide frame 33 to prevent the deformable body 31 from shifting, which affects the sealing effect of the through hole 311. Preferably, a fixing hole 341 corresponding to the positioning post 333 can be provided on the fixing transformer 34.

In order to make the sealing effect of the sealing member better, a plurality of deformation bodies 31 may be superposed. Two deformable bodies 31 are usually arranged in parallel.

In a specific embodiment, as shown in FIGS. 1-15, the outer tube 21 is sleeved on the outer side of the inner tube 22, and the three seal rings provided by the coaxial core in the interlayer of the head, as shown in FIG. 5, The interlayer is horizontally divided into a first air passage 41 and a second air passage 42, as shown in FIG. 14, a through hole 26 is provided at a position corresponding to the end of the inner pipe 22 and the smoke exhaust passage 23, so that the second air passage 42 and the exhaust The smoke passage 23 communicates, and the second air passage 42 is connected to the exhaust port 211. In addition, the sealing member 3 is sealed and fixed to the inner tube 22 by two sealing rings, and a third air passage 43 is formed by the two sealing rings. The gas inlet and outlet channels 32 of the sealing member 3 are directly connected to the third channel 43, and the inner tube A connection hole is formed in 22 to connect the second channel 42 and the third channel 43 as shown in FIG. 15.

The gas inlet and outlet passage 32 of the deformable body 31 communicates with the inlet port 212 and the outlet port 211 through the inlet valve 35 and the outlet valve 36, respectively. The intake passage 24 directly communicates with the intake port 212. When in use, the air source directly enters the air intake channel 24 from the air inlet 212 and is discharged from the air outlet 213 to inflate the abdominal cavity. When the air pressure in the abdominal cavity reaches the specified pressure, the air pump draws air through the smoke exhaust channel 23. The gas from the opening 221 enters the flue gas passage 23, then enters the second air passage 42, and then is directly discharged from the exhaust port 211. Since the end of the air outlet 213 is positive pressure, the opening 221 is negative pressure, and the pressure difference between the two places is large , So that the smoke generated during surgery can be quickly discharged from the opening 221; and because the opening 221 is provided at the end of the thin end of the inner tube 22, it is close to the surgical instrument, and the opening 221 has a large suction force, which can quickly bring the instrument near The smoke is drawn away to ensure a clear field of vision near the instrument. In addition, when the surgical instrument is extended from the surgical channel, the surgical channel needs to be sealed, the air inlet valve 35 is opened, the gas at the air inlet 213 enters the third air passage 43 through the first air passage 41, and then enters and exits from the gas The channel 32 enters the deformable body 31, expands the deformable body 31, and closely adheres to the surgical instrument to realize the sealing function. When the surgical instrument needs to be taken out, the intake valve 35 is closed, and the exhaust valve 36 is opened. With the negative pressure of the air pump, the gas in the deformable body 31 is quickly discharged, and the deformable body contracts in reverse to open the through hole 311, which is convenient for surgery Remove instruments and tissue excisions.

In one embodiment, as shown in FIG. 16, a duckbill valve 11 is also provided in the surgical channel to further ensure the sealing of the surgical channel; when the puncture rod 1 is pulled out, the surgical instrument has not been inserted, and the seal 3 The hole may not be able to seal the surgical channel very well. By setting the duckbill valve 11, the sealing of the surgical channel can be well guaranteed, and the gas in the abdominal cavity can be prevented from deflating through the surgical channel.

In the above embodiment, the thin end is the lower part as shown in FIG. 1, and the head refers to the upper part as shown in FIG.

The above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention; if modifications or equivalent replacements of the present invention are made without departing from the spirit and scope of the present invention, they should be covered by the protection scope of the claims of the present invention among.

Claims

A puncture device includes a puncture rod for creating a penetration port and a sheath tube assembly sleeved on the outer side of the puncture rod as a surgical channel, characterized in that it further includes an exhaust port, and the sheath tube assembly includes an inner tube and an outer tube A tube, the outer tube is sleeved outside the inner tube to form an interlayer, the thin end of the inner tube is provided with an opening, and a smoke exhaust channel is provided in the interlayer, the smoke exhaust channel connects the opening with the The exhaust port is connected.
The puncture device according to claim 1, further comprising an air inlet and an air inlet channel, the thin end of the outer tube is provided with an air outlet, and the air inlet channel connects the air inlet with the air inlet The air outlet is connected.
The puncture device according to claim 2, wherein the thin end of the outer tube is uniformly provided with at least one elongated air outlet extending from the center of the thin end of the outer tube to the outer periphery.
A puncture device according to claim 2, further comprising two baffles, the baffles are disposed in the interlayer, and the interlayer is divided into the air intake channel and the smoke exhaust aisle.
A trocar according to claim 2, further comprising a seal for opening and closing the surgical channel.
A puncture device according to claim 5, wherein the sealing member comprises a deformable body made of a flexible material, a gas inlet and outlet channel is provided on the deformable body, and the gas inlet and outlet channels are respectively The intake port and the exhaust port are connected, and the deformable body is provided with a through hole, and the center of the through hole is on the same straight line as the central axis of the inner tube; when the air is taken in, the deformable body expands To shrink the through hole; when exhausting, the deformed body shrinks and the through hole expands.
A trocar according to claim 5, characterized in that the deformable body is provided separately and is composed of at least two parts.
A trocar according to claim 5, characterized in that the deformable body has a ring shape, and the through hole is provided at the center of the deformable body.
A trocar according to claim 5, wherein a guide frame for restricting and guiding the expansion of the deformable body toward the center of the through hole is provided around the deformable body.
A trocar according to claim 5, wherein the flexible material is one of rubber, plastic, thermoplastic elastomer and fabric with a sealing layer.
A puncture device according to claim 1, wherein a duckbill valve is provided in the surgical channel.