CN107049383B - Air-blocking valve for abdominal cavity puncture outfit - Google Patents
Air-blocking valve for abdominal cavity puncture outfit Download PDFInfo
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- CN107049383B CN107049383B CN201710438537.XA CN201710438537A CN107049383B CN 107049383 B CN107049383 B CN 107049383B CN 201710438537 A CN201710438537 A CN 201710438537A CN 107049383 B CN107049383 B CN 107049383B
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- valve
- wall
- valve wall
- sealing
- sealing lip
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3498—Valves therefor, e.g. flapper valves, slide valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/00234—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery
- A61B2017/00292—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means
- A61B2017/0034—Surgical instruments, devices or methods, e.g. tourniquets for minimally invasive surgery mounted on or guided by flexible, e.g. catheter-like, means adapted to be inserted through a working channel of an endoscope
Abstract
The invention discloses a choke valve for an abdominal cavity puncture outfit, belonging to the field of medical puncture instruments. The choke valve comprises a valve wall, wherein the valve wall is of an integrated horn-shaped structure, an opening is formed in the center of the valve wall, and the gradient of the valve wall is gradually reduced from the opening in the center of the valve wall to the periphery of the valve wall; a plurality of folds extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall, and each fold consists of a convex rib arranged on the inner side of the valve wall and a groove arranged on the outer side of the valve wall and corresponding to the convex rib in position and shape; the sealing lip at the central opening of the valve wall is provided with a trumpet-shaped outward turning structure, and a plurality of small convex ribs extending along the central axis of the sealing lip are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip. The invention not only enables the sealing performance of the choke valve to be better, but also improves the deformation capability of the sealing valve in the direction of resisting the center normal, so that the choke valve is not easy to turn upwards, and the air leakage risk of the choke valve is reduced; and when the instrument is inserted or extracted, the resistance of the air-blocking valve to the instrument is small, and the operation is more flexible and convenient.
Description
Technical Field
The present invention relates to a sealing member, and more particularly, to a choke valve for a laparoscopic puncture instrument.
Background
The abdominal cavity puncture outfit is a surgical instrument commonly used in abdominal cavity puncture operations, and is mainly used for establishing artificial pneumoperitoneum and an instrument channel in laparoscopic operations. In laparoscopic surgery, artificial pneumoperitoneum is the key to successful surgery, and the artificial pneumoperitoneum needs to be established before surgery so as to separate the peritoneal wall from the viscera, thereby facilitating the surgical operation. The existing abdominal cavity puncture outfit mainly comprises a puncture needle, a sealing valve and a puncture sheath tube, when in use, the puncture needle, the sealing valve and the puncture sheath tube are combined together firstly, the puncture sheath tube is punctured into an abdominal cavity from human skin by the puncture needle, and an artificial pneumoperitoneum is established by a gas injection valve on the puncture sheath tube; after the puncture needle is taken out, the sealing valve and the puncture sheath tube form an operation channel, and the surgical instrument is inserted into the abdominal cavity through the sealing valve and the puncture sheath tube to carry out laparoscopic operation. In the operation process, the surgical instruments are in sealing fit with the sealing valve, so that the pneumoperitoneum cannot leak air to influence the operation, when focal tissues need to be taken out, the sealing valve is detached from the puncture sheath, the sealing is realized by the fetching valve on the puncture sheath, and the focal tissues are taken out by instruments such as biopsy forceps and the like penetrating the fetching valve.
In the application of Chinese patent No. Z L200510062967.3, entitled "seal valve" for an improved trocar seal, the invention was named as "improved seal valve" in 2009, 6.17.9, which discloses a seal valve structure for an abdominal cavity puncture instrument, the seal assembly of which comprises a first substantially rigid ring, a second substantially rigid ring, and a plurality of layers of elastomer members compressed between the two rings, the elastomer members being interlaced to form a conical seal, the elastomer members preferably having a semi-circular shape and preferably having a circumference of about 180 to 270 degrees, and a protective assembly of similar construction provided above the conical seal.
1) The sealing element is formed by a multi-section structure, so that the processing and the assembly of the sealing element are difficult, and the manufacturing cost of the sealing element is increased;
2) because the sealing element adopts a multi-section structure, complete sealing is difficult to realize when the sealing element is matched with the side wall of the instrument, and the sealing performance of the sealing element is reduced to some extent.
The invention also discloses a relative improved technology for a lip-shaped sealing element, for example, Chinese patent number Z L201320161408.8, the granted publication date is 2013, 12 and 25, the invention provides a multi-stage sealing medical puncture outfit, the invention discloses a non-resistance sealing ring, the center of the non-resistance sealing ring is a through hole which comprises an umbrella-shaped core disc, the whole non-resistance sealing ring is of a one-step forming integral structure, the umbrella-shaped core disc is positioned in the middle of the non-resistance sealing ring, the umbrella-shaped core disc is a convex structure and consists of a plurality of core disc elastic films which are uniformly distributed into an umbrella shape, the application adopts the non-resistance sealing ring with special structure and shape, the film on the periphery of the non-resistance sealing ring ensures that the instrument can move left and right without resistance in puncture, the core disc elastic films ensure that the instrument can move back and forth in puncture, the non-resistance sealing ring still has large defects, the non-resistance sealing ring is essentially a lip-shaped sealing element, the sealing ring has large resistance when the instrument is pulled out, the sealing ring is easy to be inserted into and pulled out along with the instrument, the normal puncture, the sealing ring is easy to be damaged, the leak, the sealing ring is easy to be pulled out along with the outward, the leakage of the leak of the instrument, and the leak is easily caused by the leakage of the leak.
In view of the above problems of the sealing member of the puncture outfit, a new type of air-blocking valve for the abdominal puncture outfit is needed.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defects of poor sealing property, easy outward turning along with the withdrawal of an instrument, strong instrument operation blocking feeling and the like of the air-blocking valve of the conventional abdominal puncture outfit, and provides the air-blocking valve for the abdominal puncture outfit; and when the air choke valve is inserted into or drawn out of the instrument, the air choke valve has small resistance to the instrument, and the operation is more flexible and convenient.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention discloses a choke valve for an abdominal cavity puncture outfit, which comprises a valve wall, wherein the valve wall is in an integral trumpet-shaped structure, an opening is formed in the center of the valve wall, and the gradient of the valve wall is gradually reduced from the central opening of the valve wall to the periphery of the valve wall.
Furthermore, a plurality of creases extending from the center of the valve wall to the periphery are uniformly distributed on the valve wall, and each crease is composed of a convex rib arranged on the inner side of the valve wall and a groove arranged on the outer side of the valve wall and corresponding to the convex rib in position and shape.
Furthermore, a plurality of said pleats are co-directionally curved in the valve wall about the valve wall central axis.
Furthermore, the line type of the corrugation is a three-dimensional reducing spiral line, and the radius of the three-dimensional reducing spiral line increases from the outer periphery of the valve wall to the center direction.
Furthermore, the sealing lip at the central opening of the valve wall has a trumpet-shaped eversion structure.
Furthermore, a plurality of small convex ribs extending along the central axis of the sealing lip are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip.
Furthermore, the height of said small rib with respect to the flared surface of the sealing lip decreases with decreasing radial dimension of the sealing lip until the height with respect to the flared surface of the sealing lip is zero.
Furthermore, the periphery of the valve wall is provided with a wavy elastic skirt which is integrally formed with the valve wall.
Furthermore, the air-blocking valve is made of rubber or silica gel.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) according to the air-blocking valve for the abdominal cavity puncture outfit, the valve wall is of an integral horn-shaped structure, the opening is formed in the center of the valve wall, the gradient of the valve wall is gradually reduced from the central opening of the valve wall to the periphery of the valve wall, and the air-blocking valve structure is improved, so that the sealing performance of the air-blocking valve is better, the deformation capability of the sealing valve in the direction of resisting a central normal line is obviously improved, the air-blocking valve is not easy to turn upwards, and the air leakage risk of the air-blocking valve is greatly reduced; moreover, the eversion of the air-blocking valve is effectively prevented, so that the back part of the air-blocking valve scraped by the edge and corner structure of the surgical instrument is reduced, the cracking and damage of the air-blocking valve are avoided, and the sealing performance of the abdominal puncture outfit is ensured;
(2) according to the choke valve for the abdominal cavity puncture outfit, the valve wall is uniformly provided with a plurality of wrinkles extending from the center of the valve wall to the periphery, the wrinkles are formed by the convex ribs arranged on the inner side of the valve wall and the grooves arranged on the outer side of the valve wall and corresponding to the positions and shapes of the convex ribs, and the deformation amplitude of the choke valve can be effectively reduced under the condition of frequent friction, extrusion force and stretching force; the convex ribs can effectively reduce the contact surface between the choke valve and the instrument, thereby reducing the friction force for leading in the instrument and reducing the operation blocking feeling; meanwhile, the fold structure can provide sufficient material supplement in the deformation process of the inner diameter of the choke valve, so that the risk of damage of the choke valve is effectively reduced;
(3) according to the choke valve for the abdominal cavity puncture outfit, the plurality of folds are bent on the valve wall in the same direction around the central axis of the valve wall, the line type of the folds is a three-dimensional reducing spiral line, the radius of the three-dimensional reducing spiral line is increased from the outer periphery of the valve wall to the central direction, the complexity of the mechanical property of the choke valve in the using process is fully considered, the mechanical property of the choke valve in the original shape is kept in the using process by utilizing the regular change of the three-dimensional reducing spiral line and combining the generalized hooke's law, and the deformation and the eversion of the choke valve are further prevented;
(4) according to the air choke valve for the abdominal cavity puncture outfit, the sealing lip at the central opening of the valve wall is provided with the horn-shaped outward turning structure, the horn-shaped outward turning structure at the central opening of the valve wall is opposite to the overall horn-shaped structure of the air choke valve in direction, and the normal pressure of the contact surface of the sealing lip and an instrument is effectively reduced; moreover, a plurality of small convex ribs extending along the central axis of the sealing lip are uniformly distributed on the horn-shaped everting structure of the sealing lip, and through the design of the small convex ribs, the contact area between the sealing lip and an instrument is further reduced when the instrument is drawn out, the frictional resistance drawn out by the instrument is reduced, and the everting possibility of the choke valve is further reduced;
(5) according to the air choke valve for the abdominal cavity puncture outfit, the height of the small convex rib relative to the horn-shaped surface of the sealing lip is reduced along with the reduction of the radial dimension of the sealing lip until the height of the small convex rib relative to the horn-shaped surface of the sealing lip is zero, so that the air tightness of the sealing lip is not influenced, and the friction resistance of the instrument during extraction is effectively reduced;
(6) according to the air-lock valve for the abdominal cavity puncture outfit, the wave-shaped elastic skirt edge which is integrally formed with the valve wall is further arranged on the periphery of the valve wall, the air-lock valve is made of rubber or silica gel, and the wave-shaped elastic skirt edge is used for providing mechanical support for the valve wall, so that the air-lock valve has a certain moving space, flexible operation of instruments is facilitated, and the problem of sealing failure of the air-lock valve caused by breakthrough of product limitation in similar products is solved.
Drawings
FIG. 1 is a schematic view of the overall structure of a laparoscopic puncture instrument according to the present invention;
FIG. 2 is a schematic view of a disassembled structure of the abdominal cavity puncture outfit of the present invention;
FIG. 3 is a schematic cross-sectional view of an abdominal cavity puncture outfit of the present invention;
FIG. 4 is a schematic structural view of the lancet assembly of the present invention;
FIG. 5 is a schematic structural view of the puncture head of the present invention;
FIG. 6 is a schematic structural view of a sealing valve assembly of the present invention;
FIG. 7 is an exploded view of the sealing valve assembly of the present invention;
FIG. 8 is a schematic cross-sectional view of the sealing valve assembly of the present invention;
FIG. 9 is a schematic view of an angled configuration of the choke valve of the present invention;
FIG. 10 is a schematic view of another angle configuration of the choke valve of the present invention;
FIG. 11 is a schematic cross-sectional view of a choke valve of the present invention;
FIG. 12 is a schematic view of the connection structure of the moving cover and the choke valve according to the present invention;
FIG. 13 is a schematic structural view of a sheath assembly according to the present invention;
FIG. 14 is a schematic cross-sectional view of a sheath assembly according to the present invention;
FIG. 15 is a schematic view of an angle of the object extraction valve of the present invention;
fig. 16 is a schematic view of another angle of the fetching valve of the present invention.
The reference numerals in the schematic drawings illustrate:
1. an introducer needle assembly; 1-1, puncturing a core rod; 1-2, puncturing head; 1-2-1, lance wall; 1-2-2, side edge; 1-2-3, tip; 1-3, a mandrel base; 1-4, an instrument passage port; 1-5, fixing a lock catch by an instrument; 1-6, taking the needle and fastening; 1-7, reinforcing convex ribs;
2. a sealing valve assembly; 2-1, an upper cover; 2-1-1, concave structure; 2-2, a lower cover; 2-2-1, rolling surfaces; 2-3, a choke valve; 2-3-1, valve wall; 2-3-2, an elastic skirt; 2-3-3, opening; 2-3-4, folding; 2-3-5, a cavity; 2-3-6, connecting hole; 2-3-7, sealing lip; 2-3-8 parts of small convex ribs; 2-3-9, a positioning ring; 2-4, protecting leaves; 2-5, a movable cover; 2-6, A valve ring; 2-7, B valve ring;
3. a sheath assembly; 3-1, a sheath; 3-2, a sheath tube seat; 3-2-1, operating a handle; 3-2-2, a threading hole; 3-3, a fetching valve; 3-3-1, valve clack; 3-3-2, valve port; 3-3-3, mounting edges; 3-3-4, inner wall reinforcing ribs; 3-3-5 parts of outer wall reinforcing ribs; 3-3-6, positioning blocks; 3-4, an air injection valve; 3-5, anti-skid lines; 3-6, pressing rings.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
Examples
Referring to fig. 1, fig. 2 and fig. 3, the abdominal cavity puncture outfit of the present embodiment includes a puncture needle assembly 1, a sealing valve assembly 2 and a sheath assembly 3 which can be assembled together in sequence, and the connection and assembly structure of the puncture needle assembly 1, the sealing valve assembly 2 and the sheath assembly 3 is similar to that of the existing puncture outfit, for example, the puncture needle assembly 1 and the sealing valve assembly 2 can be connected by a snap structure, and the sealing valve assembly 2 and the sheath assembly 3 can be connected by a rotary snap structure. When the puncture outfit is used, firstly, the abdominal cavity puncture outfit is assembled into the state shown in fig. 1, namely, after the sealing valve assembly 2 and the sheath tube assembly 3 are assembled, the puncture needle assembly 1 sequentially penetrates through the sealing valve assembly 2 and the sheath tube assembly 3, and the sheath tube assembly 3 is inserted into human tissues under the guidance of the puncture needle assembly 1 to establish pneumoperitoneum; then the puncture needle assembly 1 is drawn out, the sealing is realized by the fetching valve 3-3 in the sheath tube assembly 3, then the surgical operation is carried out by the surgical instrument through the sealing valve assembly 2 and the sheath tube assembly 3, and the sealing is formed by the air choke valve 2-3 in the sealing valve assembly 2 and the side wall of the instrument; when it is desired to remove surgically excised tissue, the sealing valve assembly 2 is removed and the excised tissue is removed through the access valve 3-3 using an instrument such as a biopsy forceps.
As shown in fig. 3 and 4, the puncture needle assembly 1 includes a puncture core bar 1-1 and a puncture head 1-2 disposed at one end of the puncture core bar 1-1, and unlike the existing conical puncture head structure, the puncture head 1-2 of the present embodiment is provided with two curved lance walls 1-2-1 (as shown in fig. 5), the two lance walls 1-2-1 gradually decrease from the rear portion of the puncture head 1-2 to the front portion to form a tip 1-2-3, and the two lance walls 1-2-1 intersect at two sides to form a side blade 1-2-2. The puncture head 1-2 in the embodiment is similar to a spearhead type structure, two sides of the puncture head are unfolded to form spears with edges, and the spears are gathered forwards to form sharp spikes, so that the whole puncture head 1-2 is of a streamline or side-flat structure, resistance is reduced when puncture motion advances, normal pressure of reaction force acting on the puncture head during puncture is effectively reduced, the spikes are sharp, and the penetrating power is strong. In addition, the puncture needle assembly 1 also comprises a core rod seat 1-3 which is arranged at one end of the puncture core rod 1-1 far away from the puncture head 1-2, the puncture core rod 1-1 is hollow, an instrument channel port 1-4 communicated with the puncture core rod 1-1 is arranged at the top of the core rod seat 1-3, an instrument fixing lock catch 1-5 used for fixing an instrument is arranged on the core rod seat 1-3, and a needle taking buckle 1-6 used for connecting or separating with the sealing valve assembly 2 is also arranged on the core rod seat 1-3. In the embodiment, the preferred inclination of 5-60 degrees is arranged at the 1-4 position of the instrument channel port, and the best inclination of 15-45 degrees is used for facilitating the introduction of the instrument; the upper parts of the core rod seats 1 to 3 are round and smooth, so that an operator can conveniently grasp the core rod seats during puncturing, the convenience of the operation is improved, and the puncturing risk is reduced. When the puncture needle is used, a camera tool extends into the puncture core rod 1-1 from the instrument channel opening 1-4, after the camera tool reaches a set position, the position of the camera tool is fixed by utilizing the instrument fixing lock catch 1-5, the camera tool can be conveniently placed, and the tissues can be more conveniently and clearly observed through the camera tool by combining the regular shape of the puncture head 1-2, so that organ tissues are effectively protected during puncture; the lancet assembly 1 can be removed from the sealing valve assembly 2 by pressing the needle extraction snaps 1-6. It should be understood that when a camera is needed to be used for puncture, the puncture head 1-2 is made of transparent material. In addition, in order to prevent the problem of broken shell when the puncture needle is taken out in an operation, reinforcing convex ribs 1-7 are also arranged on the core rod seat 1-3 and positioned at the periphery of the needle taking buckle 1-6, so that the circumferential antiskid and structural strength of the puncture needle assembly 1 are increased, and the appearance of the core rod seat 1-3 has higher identification degree. As for the structural principles of the instrument fixing lock 1-5 and the needle taking buckle 1-6 are similar to the prior art, the detailed description is omitted.
As shown in fig. 6, 7, 8 and 9, the sealing valve assembly 2 includes a choke valve 2-3 disposed in the valve body, the choke valve 2-3 includes a valve wall 2-3-1 having an opening 2-3-3 at the center and having an integral trumpet-shaped structure, the valve body of the sealing valve assembly 2 includes an upper cover 2-1 and a lower cover 2-2, the choke valve 2-3 is clamped between the upper cover 2-1 and the lower cover 2-2 by the outer periphery of a wavy elastic skirt 2-3-2 disposed at the periphery of the valve wall 2-3-1, the valve wall 2-3-1 and the elastic skirt 2-3-2 are preferably integrally formed, and the material of the choke valve 2-3 is preferably rubber or silicone rubber, the wavy elastic skirt 2-3-2 is used to provide mechanical support for the valve wall 2-3-1, the valve wall 2-3-1 is suspended in the center of the upper cover 2-1 and the lower cover 2-2, and has no contact with the upper cover 2-1 and the lower cover 2-2 and no friction, so that the air choke valve 2-3 has a certain moving space, and the flexible operation of the instrument is convenient. Most importantly, as shown in FIG. 11, the slope of the valve wall 2-3-1 gradually decreases from the central opening 2-3-3 of the valve wall 2-3-1 to the periphery of the valve wall 2-3-1, i.e., the valve wall 2-3-1 gradually tapers from the central opening 2-3-3 of the valve wall 2-3-1 to the periphery of the valve wall 2-3-1, the slope is the slowest at the maximum diameter and the slope is the steepest at the minimum diameter. Experiments show that the steeper the gradient of the valve wall 2-3-1 at the central opening 2-3-3, which is close to the sealing lip 2-3-7 of the sealing ring structure, the more remarkable the sealing lip 2-3-7 resists deformation in the direction of the central normal, and the less easy the sealing lip 2-3-7 turns upwards; compared with the existing inverted cone-shaped valve wall structure, the problem that the sealing lip 2-3-7 of the choke valve 2-3 turns upwards in use is effectively solved. As the operator of the instrument is aware of, when the operator of the instrument uses the instrument, the upturning of the sealing lip 2-3-7 can increase the friction force for leading in the instrument, after the upturning of the sealing lip 2-3-7, the original deformation capability of the air choke valve 2-3 is reduced, the central opening 2-3-3 is reduced, and the air choke valve is easy to be hooked by edges and corners of instruments such as a suturing nail, a hemostatic forceps and the like, which greatly influences the usability of the instrument. According to the air choke valve for the abdominal cavity puncture outfit, the structure of the air choke valve 2-3 is improved, so that the sealing performance of the air choke valve 2-3 is better, the deformation capability of the air choke valve 2-3 in the direction resisting the normal line of the center is obviously improved, the air choke valve 2-3 is not easy to turn upwards, and the air leakage risk of the air choke valve 2-3 is greatly reduced; and because the gas barrier valve 2-3 is effectively prevented from turning outwards, the back of the gas barrier valve 2-3 scraped by the edge structure of the surgical instrument is reduced, the gas barrier valve 2-3 is prevented from cracking and damaging, and the sealing performance of the abdominal puncture outfit is ensured.
As shown in fig. 9 and 10, in order to further prevent the choke valve 2-3 from turning outwards, in the present embodiment, a plurality of creases 2-3-4 extending from the center of the valve wall 2-3-1 to the periphery are uniformly distributed on the valve wall 2-3-1, and preferably, the creases 2-3-4 are formed by ribs arranged on the inner side of the valve wall 2-3-1 (the inner side of the valve wall 2-3-1 can be referred to as "male surface") and grooves arranged on the outer side of the valve wall 2-3-1 (the outer side of the valve wall 2-3-1 can be referred to as "female surface") corresponding to the positions and shapes of the ribs. Further preferably, the folds 2-3-4 are of a spiral structure, the folds 2-3-4 are bent on the valve wall 2-3-1 in the same direction around the central axis of the valve wall 2-3-1, a three-dimensional reducing spiral line type is formed macroscopically, the radius of the three-dimensional reducing spiral line increases progressively from the outer periphery of the valve wall 2-3-1 to the central direction, the convex ribs and the concave grooves forming the folds 2-3-4 are respectively attached to the male surface and the female surface of the valve wall 2-3-1, the spiral radius increases progressively from the outer periphery to the center according to an equation, and the spiral line equation:
x2+y2＝r2；
z＝k·[2π+arctan(y/x)]；
wherein r is the radius of the helix; k 2 pi is the distance of rise in the z axis per revolution; k and r are both constants.
The design of the spiral wrinkles 2-3-4 is based on the generalized Hooke's law, the three-dimensional reducing spiral line and the modern theory of solid friction, the complexity of the mechanical property of the air lock valve 2-3 in the using process is fully considered, the regular change of the three-dimensional reducing spiral line is utilized and combined with the generalized Hooke's law, and the design and analysis result shows that the deformation amplitude of the air lock valve 2-3 can be reduced well even under the frequent friction force, extrusion force and stretching force, and the original shape is kept to have the mechanical property. In the using process, the instrument enters from the bell mouth of the air lock valve 2-3, and in the process of entering the sealing lip 2-3-7, the convex rib on the male surface provides a smaller contact surface, so that the friction force introduced into the instrument is reduced; in addition, in the process of introducing the instrument, the inner diameter of the bell mouth of the air lock valve 2-3 is enlarged, and the fold structure can provide sufficient material supplement in the process of deformation of the inner diameter of the air lock valve 2-3, so that the risk of breakage of the air lock valve is effectively reduced.
In addition, as shown in fig. 10 and 11, the sealing lip 2-3-7 at the central opening 2-3-3 of the valve wall 2-3-1 in the embodiment has a trumpet-shaped outward turning structure, and a plurality of small convex ribs 2-3-8 extending along the central axis of the sealing lip 2-3-7 are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip 2-3-7. It is known that under the influence of the displacement of the instrument, the "female" face of the sealing lip 2-3-7 must contact with the instrument to generate friction, and when the friction force exceeds the dynamic friction range, the friction is converted into static friction, so that the sealing lip 2-3-7 is turned upwards to influence the service performance of the choke valve 2-3. In the structure of the sealing lip 2-3-7 in the embodiment, the direction of the trumpet-shaped outward-turning structure of the central opening 2-3-3 of the valve wall 2-3-1 is opposite to that of the integral trumpet-shaped structure of the air lock valve 2-3, the normal pressure of the contact surface of the sealing lip 2-3-7 and an instrument is reduced through the trumpet-shaped structure, meanwhile, a plurality of small convex ribs 2-3-8 which extend along the central axis of the sealing lip 2-3-7 are designed and uniformly distributed on the 'female surface' of the sealing lip 2-3-7 from the lower part of the main sealing surface, namely on the trumpet-shaped outward-turning structure of the sealing lip 2-3-7, 15-25 small convex ribs 2-3-8 are preferably arranged, and the small convex ribs 2-3-8 are characterized in that: the height of the small convex ribs 2-3-8 relative to the trumpet-shaped surface of the sealing lip 2-3-7 is reduced along with the reduction of the radial dimension of the sealing lip 2-3-7 until the height of the trumpet-shaped surface relative to the sealing lip 2-3-7 is zero, and through the design of the small convex ribs 2-3-8, the contact area between the sealing lip 2-3-7 and an instrument is further reduced when the instrument is extracted, the friction resistance of the instrument in extraction is reduced, and the possibility of the gas check valve in eversion is further reduced.
As shown in fig. 7 and 8, the inner side of the choke valve 2-3 in this embodiment is further provided with a tapered protection device covered on the inner side of the valve wall 2-3-1 and formed by interweaving a plurality of protection leaves 2-4, the protection leaves 2-4 are preferably 4, the 4 protection leaves 2-4 are staggered with each other to form a tapered structure, the periphery of the protection device is clamped by the valve ring a 2-6 and the valve ring B2-7 and is installed in a cavity 2-3-5 enclosed by the upper part of the valve wall 2-3-1 and the elastic skirt 2-3-2, the valve ring a 2-6 and the valve ring B2-7 are provided with a connecting column and a connecting hole which are matched with each other, the valve ring a 2-6 and the valve ring B2-7 clamp and fix the periphery of the protection leaves 2-4 through the insertion and matching of the connecting column and the connecting hole, the valve ring A2-6 and the choke valve 2-3 are also in fit connection through a connecting column and a connecting hole. The protective leaves 2-4 are utilized to protect the air lock valve 2-3 to a certain extent, and the corrugated structure arranged on the air lock valve 2-3 also reduces the friction force between the air lock valve 2-3 and the protective leaves 2-4 on the upper part, ensures the flexible action between the sealing valve components 2 in the using process and reduces the blocking feeling of the operation of the instrument. In addition, referring to fig. 6, 7, 8 and 12, the choke valve 2-3 in this embodiment is further provided with a movable cover 2-5 covering the outside of the valve wall 2-3-1 and having an opening in the center, the outer side surface of the movable cover 2-5 is a spherical surface, the inner wall of the lower through hole of the lower cover 2-2 can be matched with the spherical surface outside the movable cover 2-5, and preferably, a circle of spherical rolling surface 2-2-1 can be provided at the inner wall of the lower through hole of the lower cover 2-2 to enable the movable cover 2-5 to perform relative rolling movement on the lower cover 2-2; the diameter of the movable cover 2-5 is larger than that of the through hole at the lower part of the lower cover 2-2, and the diameter of the opening of the movable cover 2-5 is smaller than that of the through hole at the lower part of the lower cover 2-2. Specifically, a plurality of connecting columns are arranged at the upper part of the movable cover 2-5, and connecting holes 2-3-6 matched and connected with the connecting columns are arranged on the air choke valve 2-3; in order to better coaxially position the movable cover 2-5 and the choke valve 2-3 and prevent the movable cover 2-5 and the choke valve 2-3 from being dislocated relatively during use, a circle of positioning ring 2-3-9 is further arranged on the outer side of the choke valve 2-3, and the positioning ring 2-3-9 is matched with and limited by a positioning ring on the movable cover 2-5. The movable cover 2-5 is matched with the inner wall of the lower through hole of the lower cover 2-2 in a rolling way, so that the air choke valve 2-3 can have a universal rotating function in the sealing valve assembly 2, and the flexible operation of instruments is facilitated; and the rigidity constraint of the choke valve 2-3 in each direction in the use range is zero, thereby providing excellent operability for operators and avoiding the problem of sealing failure of the choke valve 2-3 caused by breakthrough of product limit in the similar products. In order to facilitate the instruments to extend into the sealing valve assembly 2 for surgical operation, the upper opening of the upper cover 2-1 is further provided with a concave structure 2-1-1 for smooth introduction of the instruments.
As shown in fig. 3, 13 and 14, the sheath assembly 3 comprises a sheath 3-1, a sheath seat 3-2 disposed at one end of the sheath 3-1, and a fetching valve 3-3 disposed in the sheath seat 3-2, wherein the sheath 3-1 and the sheath seat 3-2 are formed in an integral structure to ensure the air tightness of the sheath 3-1; the anti-slip grains 3-5 are further arranged on the periphery of the sheath tube 3-1, the anti-slip grains 3-5 are utilized to increase the resistance of the sheath tube 3-1 in the puncturing process, the damage to organs caused by the fact that the puncture outfit punctures too deeply due to the fact that the resistance is suddenly reduced when penetrating tissues is effectively prevented, and the use is safer and more reliable. A sheath tube seat 3-2 of the sheath tube component 3 is also provided with a gas injection valve 3-4 communicated with the sheath tube 3-1, so that pneumoperitoneum operation is facilitated; the two sides of the sheath tube seat 3-2 are also provided with operating handles 3-2-1 which are convenient to hold, the operating handles 3-2-1 are provided with threading holes 3-2-2 which are convenient for connecting and fixing, so that an operator can conveniently hold and operate, and in order to adapt to different operation requirements, a method for fixing the sheath tube 3-1 and the skin surface of a patient by using a suture line is provided for the operator, so that the operation convenience is improved.
Referring to fig. 14, 15 and 16, in the present embodiment, the fetching valve 3-3 in the sheath assembly 3 adopts a three-petal structure, and compared with a duckbill fetching valve, a radial channel of the fetching valve is further enlarged, so that convenience of fetching the excised tissue is improved, difficulty and time of the operation are reduced, and operation risk is reduced; compared with a four-flap type fetching valve, the fetching valve 3-3 is high in structural strength, few in incision and better in sealing performance. Specifically, in this embodiment, the fetching valve 3-3 includes three valve flaps 3-3-1, each valve flap 3-3-1 includes a valve side wall and a valve bottom wall connected to the valve side wall into a whole, the valve side walls of the three valve flaps 3-3-1 are connected into a whole, three valve ports 3-3-2 extending from the center to the connecting edge of the valve side wall are formed in the valve bottom wall of the three valve flaps 3-3-1, and an included angle of the three valve ports 3-3-2 is preferably 120 °. The outer side of each valve clack 3-3-1 is provided with an outer wall reinforcing rib 3-3-5 extending from the valve bottom wall to the outer edge of the valve side wall, the inner side of each valve clack 3-3-1 is provided with an inner wall reinforcing rib 3-3-4 positioned on the connecting edge of the valve bottom wall and the valve side wall, and the outer wall reinforcing rib 3-3-5 and the inner wall reinforcing rib 3-3-4 ensure the stability of the shape of each valve clack 3-3-1, ensure the natural closing of the valve port 3-3-2 of the fetching valve 3-3, and prevent the valve bottom wall of the valve clack 3-3-1 from turning outwards to cause sealing failure. In addition, the outer wall reinforcing ribs 3-3-5 extend to the outer edge of the valve side wall from the valve bottom wall, the overall strength of the object taking valve 3-3 is improved, the stability and the reliability of the structure are improved, the rebound rate is improved, the self-tightness of the object taking valve 3-3 is improved, the inner wall reinforcing ribs 3-3-4 are arranged on the connecting edge of the valve bottom wall and the valve side wall, the size of the inner wall reinforcing ribs 3-3-4 is small, the space inside the object taking valve 3-3 is not occupied, meanwhile, the interference of hook hanging and the like to the operation of instruments is avoided, and the practicability is higher. In addition, the valve side wall of each valve flap 3-3-1 is inwardly curved, and the slope of the valve side wall gradually decreases from the bottom of the valve side wall toward the outer edge of the valve side wall, which contributes to the improvement in the deformation resistance and resilience of the valve flap 3-3-1. In order to facilitate the installation of the fetching valve 3-3 in the sheath tube seat 3-2, the outer edge of the valve side wall of the three-flap valve flap 3-3-1 is also provided with a circle of installation edge 3-3-3, the fetching valve 3-3 can be fixed in the sheath tube seat 3-2 through a compression ring 3-6, and the bottom of the installation edge 3-3-3 is also provided with a positioning block 3-3-6, so that the fetching valve 3-3 is convenient to fix in position, simple in structure and convenient to install.
According to the air-blocking valve for the abdominal cavity puncture outfit, the structure of the air-blocking valve is improved, so that the sealing performance of the air-blocking valve is better, the deformation capability of the sealing valve in the direction resisting the center normal is obviously improved, the air-blocking valve is not easy to upturn, and the air leakage risk of the air-blocking valve is greatly reduced; and when the air choke valve is inserted into or drawn out of the instrument, the air choke valve has small resistance to the instrument, and the operation is more flexible and convenient.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (5)
1. A choke valve for an abdominal cavity puncture outfit comprises a valve wall (2-3-1), wherein the valve wall (2-3-1) is in an integral trumpet-shaped structure, an opening (2-3-3) is formed in the center of the valve wall (2-3-1), and the choke valve is characterized in that: the gradient of the valve wall (2-3-1) is gradually reduced from the central opening (2-3-3) of the valve wall (2-3-1) to the periphery of the valve wall (2-3-1); a plurality of wrinkles (2-3-4) extending from the center of the valve wall (2-3-1) to the periphery are uniformly distributed on the valve wall (2-3-1), and the wrinkles (2-3-4) are formed by convex ribs arranged on the inner side of the valve wall (2-3-1) and grooves arranged on the outer side of the valve wall (2-3-1) and corresponding to the positions and shapes of the convex ribs;
the sealing lip (2-3-7) at the central opening (2-3-3) of the valve wall (2-3-1) is provided with a trumpet-shaped outward turning structure, and a plurality of small convex ribs (2-3-8) extending along the central axis of the sealing lip (2-3-7) are uniformly distributed on the trumpet-shaped outward turning structure of the sealing lip (2-3-7); the height of the small convex rib (2-3-8) relative to the trumpet-shaped surface of the sealing lip (2-3-7) is reduced along with the reduction of the radial dimension of the sealing lip (2-3-7) until the height of the trumpet-shaped surface relative to the sealing lip (2-3-7) is zero.
2. A choke valve for a laparoscopic puncture instrument according to claim 1, wherein: the plurality of the wrinkles (2-3-4) are bent on the valve wall (2-3-1) in the same direction around the central axis of the valve wall (2-3-1).
3. A choke valve for a laparoscopic puncture instrument according to claim 2, wherein: the line type of the fold (2-3-4) is a three-dimensional reducing spiral line, and the radius of the three-dimensional reducing spiral line is gradually increased from the outer periphery of the valve wall (2-3-1) to the center direction.
4. A choke valve for a laparoscopic puncture instrument according to claim 1, 2 or 3, characterized in that: the periphery of the valve wall (2-3-1) is also provided with a wave-shaped elastic skirt edge (2-3-2) which is integrally formed with the valve wall (2-3-1).
5. A choke valve for a laparoscopic puncture instrument according to claim 4, wherein: the air-blocking valve is made of rubber or silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438537.XA CN107049383B (en) | 2017-06-12 | 2017-06-12 | Air-blocking valve for abdominal cavity puncture outfit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710438537.XA CN107049383B (en) | 2017-06-12 | 2017-06-12 | Air-blocking valve for abdominal cavity puncture outfit |
Publications (2)
| Publication Number | Publication Date |
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| CN107049383A CN107049383A (en) | 2017-08-18 |
| CN107049383B true CN107049383B (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710438537.XA Expired - Fee Related CN107049383B (en) | 2017-06-12 | 2017-06-12 | Air-blocking valve for abdominal cavity puncture outfit |
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| CN (1) | CN107049383B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108542456A (en) * | 2018-03-29 | 2018-09-18 | 盈甲医疗器械制造（上海）有限公司 | A kind of stapler with percussion linkage |
| CN114451970A (en) * | 2021-12-24 | 2022-05-10 | 浙江医高医疗科技有限公司 | Improved ureteral sheath |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040260244A1 (en) * | 2001-08-31 | 2004-12-23 | Piechowicz Michael E. | Seals for trocars |
| US7789861B2 (en) * | 2006-04-18 | 2010-09-07 | Ethicon Endo-Surgery, Inc. | Pleated trocar seal |
| CN201461935U (en) * | 2009-07-30 | 2010-05-12 | 南方天合底盘系统有限公司 | High-intensity sealing leather collar |
| CN202408985U (en) * | 2011-12-30 | 2012-09-05 | 安徽奥弗医疗设备科技有限公司 | Rotatable sealing ring assembly in puncture outfit |
| CN207949831U (en) * | 2017-06-12 | 2018-10-12 | 常州艾隆精密机械有限公司 | A kind of air shuttle valve for abdominal cavity puncture outfit |
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| CN107049383A (en) | 2017-08-18 |
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