CN112438766B - Closed driving mechanism and medical stapler including the same - Google Patents
Closed driving mechanism and medical stapler including the same Download PDFInfo
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- CN112438766B CN112438766B CN201910806840.XA CN201910806840A CN112438766B CN 112438766 B CN112438766 B CN 112438766B CN 201910806840 A CN201910806840 A CN 201910806840A CN 112438766 B CN112438766 B CN 112438766B
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- 230000007246 mechanism Effects 0.000 title claims abstract description 58
- 230000006835 compression Effects 0.000 claims abstract description 21
- 238000007906 compression Methods 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 6
- 230000003872 anastomosis Effects 0.000 claims description 5
- 230000005489 elastic deformation Effects 0.000 claims 1
- 230000004323 axial length Effects 0.000 abstract description 3
- 241000587161 Gomphocarpus Species 0.000 description 29
- 238000010304 firing Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000013016 damping Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000013013 elastic material Substances 0.000 description 2
- 210000001035 gastrointestinal tract Anatomy 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 210000003238 esophagus Anatomy 0.000 description 1
- 230000000968 intestinal effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
- A61B17/115—Staplers for performing anastomosis, e.g. in a single operation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
- A61B17/1114—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis of the digestive tract, e.g. bowels or oesophagus
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
- A61B2017/1132—End-to-end connections
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/11—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis
- A61B2017/1135—End-to-side connections, e.g. T- or Y-connections
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Physiology (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
The invention provides a closing driving mechanism and a medical anastomat comprising the same, wherein the closing driving mechanism comprises a driving part and a cylinder body, the driving part is connected with a closing pulling piece of the anastomat, the driving part is connected with the proximal end side of the cylinder body, a cavity part is formed in the cylinder body, and a one-way valve is arranged in the cavity part. When the head of the nail is closed, the driving part moves towards the far end side of the anastomat, the axial length of the cylinder body is driven to be shortened, the volume of the compression cavity part is reduced, the one-way valve is closed to prevent air in the cavity part from being communicated with external air, the air in the cavity part is compressed to form resistance to the movement of the driving part, the movement speed of the piston part is slowed down, the nail bin and the nail anvil of the anastomat are slowly separated, and the damage to surrounding tissues caused by overlarge force for opening the jaw is avoided.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a closing driving mechanism and a medical anastomat comprising the same.
Background
Digestive tract diseases are one of the diseases of high incidence of human beings, and during the treatment process, a medical anastomat is often used for anastomosing physiological tissues such as digestive tract and the like instead of manual operation of doctors. The medical anastomat is a common surgical instrument, and most of the medical anastomat adopts an axial internal stapling mode, and forms end-to-end or end-to-side anastomosis on physiological tissues such as esophagus, stomach, intestinal canal and the like during operation, two sections of tissues are accommodated in the medical anastomat in a astringing way during anastomosis, and a circular anastomosis opening is formed on the tissues after the completion of percussion, so that a human body channel is reconstructed.
In the prior art, the medical anastomat comprises a medical anastomat body, an operating handle movably connected with the medical anastomat body and a nail head matched with the medical anastomat body. The nail head part comprises a nail bin and a nail anvil which are oppositely arranged. When in operation, the movable handle is held firstly, the closing pulling piece at the head of the staple is pulled to move towards the proximal end side of the anastomat through the closing driving mechanism, so that after the staple cartridge and the anvil assembly are closed, the operation handle is held again, the staples can be pushed to move towards tissues, and the tissues are anastomosed through the forming of the staples in the staple cartridge at the anvil assembly. After the anastomat is completely fired, the nail head needs to be opened, and the nail bin and the nail anvil are separated. However, in the prior art stapling apparatus, after the stapling apparatus is fired, the staple cartridge and anvil are relatively abruptly and rapidly separated, and the abruptly opened jaws may damage other tissues.
In the present invention, the distal end side and the proximal end side are the proximal end side with respect to the operator, and the end closer to the operator, that is, the end closer to the surgical site is the distal end side.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a closing driving mechanism and a medical anastomat comprising the same, and the nail head part is slowly opened after the percussion of the anastomat is completed through a unidirectional air damping structure.
The embodiment of the invention provides a closing driving mechanism which is used for a medical anastomat and comprises a driving part and a cylinder body, wherein the driving part is connected with a closing pulling piece of the anastomat, the driving part is connected with the proximal end side of the cylinder body, a cavity part is formed in the cylinder body, and a one-way valve is arranged in the cavity part;
When the driving part moves to the proximal end side of the anastomat, the closing pulling piece and the proximal end side of the cylinder body are respectively driven to move to the proximal end side of the anastomat, the length of the cylinder body along the axial direction of the anastomat is elongated, the volume of the cavity part is increased, and the one-way valve is opened;
When the driving part moves to the distal end side of the anastomat, the driving part respectively drives the closing pulling piece and the proximal end side of the cylinder body to move to the distal end side of the anastomat, the length of the cylinder body along the axial direction of the anastomat is shortened, the volume of the cavity part is reduced, and the one-way valve is closed.
Optionally, the driving part comprises a first driving piece and a second driving piece which are connected, wherein the first driving piece is connected with the closing pull piece, and the second driving piece is connected with the proximal end side of the barrel.
Optionally, the driving part is at least partially located inside the cylinder, and the inner wall of the cylinder and the driving part enclose the cavity part.
Optionally, the side wall of the cylinder is a flexible side wall, and in an initial state, the flexible side wall of the cylinder has a bending deformation amount, and when the driving part moves towards the proximal end side of the anastomat, the bending deformation amount of the flexible side wall is reduced.
Optionally, the side wall of the cylinder is an elastic side wall, and when the driving part drives the proximal end side of the cylinder to move towards the proximal end side of the anastomat, the elastic side wall of the cylinder is pulled to elastically deform.
Optionally, the cylinder is a bellows extending along an axial direction of the anastomat, and in an initial state, the bellows has a compression deformation amount, and when the driving part moves to a proximal end side of the anastomat, the compression deformation amount of the bellows is reduced.
Optionally, the mechanism further comprises a sleeve, the cylinder and the driving part are both sleeved on the sleeve, and the driving part can move along the axial direction of the sleeve;
and a sealing element is arranged between the outer wall of the sleeve and the cylinder body.
Optionally, the one-way valve is disposed on a distal side of the barrel.
Optionally, the cavity part is further provided with an air hole communicated with air.
Optionally, the distal side of the cartridge is secured to the housing of the stapler.
Optionally, the device further comprises a biasing piece and a pull rope, wherein the biasing piece and the pull rope are respectively connected with the driving part;
when the nail head of the anastomat is driven to be closed, the driving part is pulled by the pull rope to move towards the proximal end side of the anastomat, and the biasing piece is deformed;
When the nail head of the anastomat is driven to open, the driving part moves to the distal end side of the anastomat under the action of the deformation restoring force of the biasing piece.
Optionally, the closing driving mechanism further comprises a movable handle, a sliding block and a steering supporting beam, the pull rope is sleeved on the steering supporting beam, and two ends of the pull rope are respectively connected with the sliding block and the driving part;
When the movable handle is held in an initial state, the movable handle drives the sliding block to move towards the distal end side of the anastomat, and the sliding block pulls the driving part to move towards the proximal end side of the anastomat through the pull rope.
The embodiment of the invention also provides a medical anastomat, which comprises the closing driving mechanism.
The closing driving mechanism and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a closed driving mechanism for a medical anastomat, which is provided with a cylinder body matched with a driving part, wherein the side wall of the cylinder body is made of flexible or elastic materials, the cylinder body can be lengthened or shortened under the driving of the driving part, the volume change of a cavity part in the cylinder body is caused, and the opening and the closing of a communication channel between the cavity part and outside air are controlled through a one-way valve; when the nail head is closed and driven, the side wall of the cylinder body is elongated along the axial direction to increase the volume of the cavity, the one-way valve is opened to charge air into the cavity, the driving part drives the pull tab to move towards the proximal end side of the anastomat to drive the nail head to be closed, after the firing of the anastomat is completed, the side wall of the cylinder body is shortened along the axial direction to reduce the volume of the cavity, the one-way valve is closed, air in the cavity is compressed, the driving part is subjected to the resistance of compressed air to slow down the movement towards the distal end side of the anastomat, so that the nail head can be slowly opened, and the damage to surrounding tissues caused by the overlarge force of opening the jaws is avoided.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings.
FIG. 1 is a schematic view of a closure drive mechanism according to a first embodiment of the present invention mated with a housing of a stapler;
FIG. 2 is a schematic view of the stapler housing of FIG. 1 with the stapler housing removed;
FIG. 3 is a schematic view of the structure of FIG. 2 with the barrel removed;
FIG. 4 is a schematic view showing the structure of the closing drive mechanism in an initial state according to the first embodiment of the present invention;
FIG. 5 is a top view of the closure drive mechanism in an initial state of the first embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along the direction A1-A1 in FIG. 5;
FIG. 7 is a schematic view of a closed driving mechanism after closing the nail head according to the first embodiment of the present invention;
FIG. 8 is a top view of the closure drive mechanism after closure of the tack head of the first embodiment of the present invention;
FIG. 9 is a cross-sectional view taken along the direction A2-A2 in FIG. 8;
FIG. 10 is a schematic view of the closure drive mechanism of the stapler of the first embodiment of the present invention after firing is completed;
FIG. 11 is a schematic view showing the structure of a closing drive mechanism in an initial state according to a second embodiment of the present invention;
FIG. 12 is a schematic view of a closed drive mechanism after closing the nail head according to a second embodiment of the present invention;
FIG. 13 is a schematic view of a closure driving mechanism according to a third embodiment of the present invention;
FIG. 14 is a schematic view of a closure driving mechanism according to a fourth embodiment of the present invention;
FIG. 15 is a schematic view of a closure driving mechanism according to a fifth embodiment of the present invention;
fig. 16 is a schematic structural view of a closure driving mechanism of a sixth embodiment of the present invention.
Reference numerals:
1. second slider of stapler body 42
11. Third slider of fixed handle 43
12. Second compression spring of closing tab 44
13. Shell 51 stay cord
14. Steering support beam with sleeve 52
2. Actuating lever 61 driving part
21. First driving member of pressing part 62
22. First compression spring of firing part 63
23. Rack 64 second driving member
3. Movable handle 65 connecting rod
31. Jack catch 71 barrel
32. Connecting rod 72 seal
41. First slider 73 check valve
411. First groove 74 cavity portion
412. Second groove
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a repetitive description thereof will be omitted.
In order to solve the technical problems in the prior art, the invention provides a closing driving mechanism for a medical anastomat and the medical anastomat comprising the nail bin. The anastomat comprises a nail head part and an anastomat body, wherein a closing pull piece for closing the nail head part is arranged in the anastomat body. The closing driving mechanism is used for a medical anastomat and comprises a driving part and a cylinder body, wherein the driving part is connected with a closing pulling piece of the anastomat and can pull the closing pulling piece to move along the axial direction of the anastomat, the driving part is connected with the proximal side of the cylinder body and can pull the proximal side of the cylinder body to move along the axial direction of the anastomat so as to enable the length of the side wall of the cylinder body along the axial direction to be prolonged or shortened, a cavity part is formed in the cylinder body, and the volume of the cavity part is changed along with the length change of the side wall of the cylinder body.
The cavity part is provided with a one-way valve. The one-way valve is opened when receiving force in a first direction, so that the cavity part is communicated with external air, at the moment, if the volume of the cavity part is increased, the cavity part can be inflated through the opening degree of the one-way valve, and the one-way valve is closed when receiving force in a second direction, so that the cavity part becomes a closed cavity which is not communicated with the external air, and at the moment, if the volume of the cavity part is reduced, the air in the cavity part is compressed.
Before the stapler is fired, the operator needs to close the staple cartridge and anvil to clamp the tissue. At this time, the driving part moves towards the proximal end side of the anastomat, drives the closing pulling piece to move towards the proximal end of the anastomat so as to enable the nail head to be closed, and simultaneously, the driving part drives the proximal end side of the cylinder body to move towards the proximal end side of the anastomat, the length of the cylinder body along the axial direction of the anastomat is prolonged, the volume of the cavity part is increased, and the one-way valve is opened so as to charge air in the cavity part. With the increasing volume of the cavity part, air is continuously introduced into the cavity part to fill the increased volume, so that the closing process of the nail head is not hindered.
After the anastomat is completely fired, when the driving part moves to the distal end side of the anastomat, the closing pulling piece is driven to move to the distal end side of the anastomat so as to open the nail head. At this time, the driving part drives the proximal end side of the cylinder to move towards the distal end side of the anastomat, the length of the cylinder along the axial direction of the anastomat is shortened, the volume of the cavity part is reduced, and the one-way valve is closed, so that the cavity part becomes a closed cavity. The air in the cavity part is compressed along with the continuous reduction of the volume of the cavity part, and the compressed air forms a certain resistance to the movement of the driving part towards the distal end direction of the anastomat, so that the movement speed of the driving part is slowed down, the nail anvil and the nail bin can be slowly separated, and the damage to surrounding tissues caused by overlarge force for opening the jaw is avoided.
The structure of the closure drive mechanism and stapler according to the embodiments of the present invention will be further described with reference to fig. 1 to 16. Fig. 1 to 10 show a structure of a closing driving mechanism and a stapler according to a first embodiment of the present invention.
As shown in fig. 1 to 6, the structure of the closing drive mechanism and the stapler in the initial state in the first embodiment is shown. In this embodiment, the stapler comprises a stapler body 1 and a nail head (not shown in the figure) located at the distal end side of the stapler body 1, the stapler body 1 comprises a housing 13 and a fixing handle 11, a sleeve 14 extending along the axial direction of the stapler is further arranged inside the stapler body 1, a closing pull tab 12 for closing the nail head and opening the nail head is arranged inside the sleeve 14, the closing pull tab 12 is separated from the nail anvil and the nail cartridge in an initial state, the nail anvil and the nail cartridge are closed when the closing pull tab 12 moves to the proximal end side of the stapler, and the nail head can be reopened when the closing pull tab 12 moves to the distal end side of the stapler.
As shown in fig. 1 to 4, the closing driving mechanism includes a driving portion 61 and a cylinder 71, and the driving portion 61 and the cylinder 71 are both sleeved outside the sleeve 14. The driving part 61 is connected with the closing tab 12 of the anastomat to form the linkage of the driving part 61 and the closing tab 12, and the driving part 61 is fixedly connected with the proximal end side of the cylinder 71 to form the linkage of the driving part 61 and the proximal end side of the cylinder 71. A cavity 74 is formed in the cylinder 71, and the cavity 74 is provided with a check valve 73.
In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator and the proximal side refers to the end nearer to the operator. The upward or upward direction is directed towards the side facing away from the rack 23 with respect to the actuating lever 2, and the downward or downward direction is opposite thereto. For example, in the view of fig. 1, the distal side of the stapler body 1 is the left end in the drawing, the proximal side of the stapler body 1 is the right end in the drawing, and in the view of fig. 1 and 2, the upward direction means the upper end in the drawing.
In this embodiment, the check valve 73 is provided on the distal end side of the cylinder 71. The check valve 73 is opened when the check valve 73 receives a force from the distal end side to the proximal end side of the stapler, the cavity 74 is connected to the outside air, and the check valve 73 is closed when the check valve 73 receives a force from the proximal end side to the distal end side of the stapler, and the cavity 74 is a closed cavity. As shown in fig. 4 to 6, in order to better realize the sealing of the cavity 74, the cylinder 71 and the sleeve 14 are connected in a sealing manner, and a sealing member 72 is preferably provided between the outer wall of the sleeve 14 and the inner wall of the opening in which the cylinder 71 is sleeved on the sleeve 14, and the sealing member 72 may be a sealing ring, but the present invention is not limited thereto, and the sealing member 62 may be made of a flexible material such as rubber or plastic.
In this embodiment, the sidewall of the cylinder 71 is a flexible sidewall, for example, the sidewall is made of plastic, textile material, or the like. In a preferred embodiment, the distal and proximal sides of the barrel 71 may be configured to be rigid, with only the side walls of the barrel 71 being deformable. In an alternative embodiment, the whole body of the cylinder 71 may be made of flexible material, for example, the whole body of the cylinder 71 may be made of plastic, rubber, or the like. As shown in fig. 4 to 6, in the initial state, the flexible sidewall of the cylinder 71 has a predetermined bending deformation.
In this embodiment, the distal side of the barrel 71 is fixed to the housing 13 of the stapler, thereby keeping the position of the distal side of the barrel 71 relatively stable. As the proximal side of the barrel 71 moves in the axial direction of the stapler, the distance between the distal side of the barrel 71 and the proximal side of the barrel 71 changes accordingly.
As shown in fig. 3 to 6, the closing driving mechanism further includes a movable handle 3, a biasing member, a pull rope 51, a steering support beam 52, and a first slider 41, and in order to reduce the resistance when the pull rope 51 moves, the steering support beam 52 preferably adopts a pulley structure. The biasing member provides a biasing force to the drive portion 61 toward the distal end side of the stapler. In this embodiment, the biasing member is a first compression spring 63 disposed on the proximal end side of the driving portion 61, and in other alternative embodiments, the biasing member may be a tension spring, a spring plate, or the like, but is not limited thereto.
The side surface of the first slider 41 is provided with a second groove 412, one end of the pull cord 51 is disposed in the second groove 412, and the other end of the pull cord 51 is fixed to the driving portion 61, so as to realize the linkage of the first slider 41 and the driving portion 61. Further, after the transmission of the movement of the first slider 41 to the driving portion 61 is achieved by the steering support beam 52, the movement direction of the first slider 41 is opposite to the movement direction of the driving portion 61.
As shown in fig. 3, the closure driving mechanism further comprises a holder and an actuating rod 2, the actuating rod 2 extending in the axial direction of the stapler. The holder comprises a second slider 42 and a third slider 43, a second compression spring 44 being arranged below the third slider 43. The actuating lever 2 includes a pressing portion 21 and a firing member 22, and in an initial state, initial positions of the first slider 41 and the pressing portion 21 are both located on a proximal end side of the holder.
As shown in fig. 7 to 9, in the first embodiment, the structure of the closing driving mechanism is shown when the nail head of the stapler is driven to close. Holding the movable handle 3, the movable handle 3 drives the first sliding block 41 to move towards the distal end side of the anastomat through the connecting rod 32, and simultaneously, the movable handle 3 drives the actuating rod 2 to move towards the distal end side of the anastomat through the claw 31. When the first slider 41 moves towards the distal end of the stapler, the driving part 61 is pulled by the pull rope 51 to press the first pressure spring 63 to generate compression deformation, and the driving part 61 drives the closing pull piece 12 to move towards the proximal end of the stapler at the same time so as to drive the nail anvil and the nail bin to be closed and close the nail head.
During the closing process of the nail head, the driving part 61 drives the proximal end side of the cylinder 71 to move towards the proximal end side of the anastomat, the distance between the proximal end side of the cylinder 71 and the distal end side of the cylinder 71 is increased, the bending deformation amount of the cylinder 71 is reduced, the length of the cylinder 71 along the axial direction of the anastomat is prolonged, the volume of the cavity part 74 is increased, and the one-way valve 73 is opened by the force towards the proximal end side of the anastomat, so that a communication channel between the cavity part 74 and the outside air is formed. Therefore, the unidirectional air damping structure does not hinder the movement of the driving portion 61 during closing of the head portion, and the head portion can be normally closed to clamp tissue.
As shown in fig. 7, when the head is closed, the first slider 41 moves below the holder, while the pressing portion 21 (not shown in this figure) of the actuating lever 2 contacts the upper side of the third slider 43 in the holder and presses the third slider 43 downward, so that the second slider 42 in the third slider 43 partially enters the first recess 411 in the upper surface of the first slider 41 to maintain the stability of the position of the first slider 41 during firing of the stapler. At this time, the second compression spring 44 is compressively deformed by the third slider 43. In this process, due to the restoring force of the first slider 41 to the deformation of the first compression spring 63 by the pulling force of the pull cord 51 applied to the driving portion 61 in the direction toward the proximal end of the stapler, the driving portion 61 is maintained in the position in fig. 7 by the pulling of the pull cord 51, thereby maintaining the stability of the closing of the nail head during firing of the stapler.
The engagement between the first slider 41 and the retainer is only one embodiment, and in other alternative embodiments, an upwardly concave groove may be provided on the lower surface of the retainer, and when the pressing portion 21 of the actuating lever 2 presses the retainer downward, the retainer moves downward so that the upper end of the first slider 41 enters the groove of the retainer, thereby realizing the engagement between the retainer and the first slider 41.
As shown in FIG. 10, in a first embodiment, the configuration of the closure drive mechanism is shown after firing of the stapler is completed. At this time, the pressing portion 21 (not shown in the drawing) of the actuating lever 2 no longer presses the third slider 43 downward, and the third slider 43 moves upward under the deformation restoring force of the second compression spring 44, thereby driving the second slider 42 to move upward to disengage from the first groove 411 of the first slider 41. The first slider 41 loses the holding action of the holding member and is free to move without exerting a pulling force on the driving part 61 towards the proximal side of the stapler. At this time, under the action of the deformation restoring force of the first compression spring 63, the driving part 61 moves towards the distal end side of the stapler, and drives the closing tab 12 to move towards the distal end side of the stapler, so that the anvil and the cartridge of the stapler are separated to open the head of the staple.
During the opening of the nail head of the stapler, as the driving part 61 moves toward the distal side of the stapler, the distance between the proximal side wall of the cylinder 71 and the distal side wall of the cylinder 71 is gradually reduced, the length of the cylinder 71 in the axial direction of the stapler is gradually reduced, the volume of the cavity 74 is gradually reduced, and the check valve 73 is closed by the force toward the distal side of the stapler. At this time, the hollow portion 74 is not communicated with the external air, the air is gradually compressed along with the reduction of the volume of the hollow portion 74, the movement of the driving portion 61 to the distal end side of the stapler is subjected to the resistance of the compressed air, so that the movement speed of the driving portion 61 is slowed down, and the nail head of the stapler is slowly opened. In other alternative embodiments, the side wall of the cavity 74 may be further provided with a small air hole communicating with air, which can only be discharged to the outside very slowly when the volume of the cavity 74 is reduced, however, the discharging speed of the small air hole is not higher than the compressed speed of the air, so that the air still generates resistance to the movement of the driving part 62 to the distal end side. The small pneumatic opening is preferably smaller than the opening of the check valve 73, but the present invention is not limited thereto.
In an alternative embodiment, the side wall of the cylinder 71 may be an elastic side wall, for example, a rubber material that can be deformed by stretching and can be restored after the stretching. In the initial state, the side wall of the cylinder 71 is not deformed, and when the driving part 61 drives the proximal end side of the cylinder 71 to move toward the proximal end side of the stapler, the elastic side wall of the cylinder 71 is pulled to elastically stretch and deform. When the driving part 61 drives the proximal end side of the cylinder 71 to move toward the distal end side of the stapler, the elastic tensile deformation of the cylinder 71 gradually decreases so that the length of the cylinder 71 in the axial direction of the stapler is shortened.
Fig. 11 and 12 are schematic structural views of a closing drive mechanism according to a second embodiment of the present invention. This embodiment differs from the first embodiment in that in the first embodiment the driving part 61 is located inside the cylinder 71, the inner wall of the cylinder 71 and the driving part 61 enclose the cavity 74, whereas in the second embodiment the driving part 61 is located outside the cylinder 71, the inner wall of the cylinder 71 encloses the cavity. In an alternative embodiment, the driving portion 61 may be only partially located inside the cylinder 71, and partially located outside the cylinder 71, which falls within the scope of the present invention.
Fig. 13 is a schematic structural view of a closing driving mechanism according to a third embodiment of the present invention. This embodiment differs from the first embodiment in that the tubular body 71 is a bellows extending in the axial direction of the stapler, and in the initial state, the bellows has a compression deformation amount, the compression deformation amount of the bellows decreases when the driving portion 61 moves toward the proximal end side of the stapler, the axial length of the bellows increases, the volume of the cavity portion inside the bellows increases, the compression deformation amount of the bellows increases when the driving portion 61 moves toward the distal end side of the stapler, the axial length of the bellows decreases, and the volume of the cavity portion inside the bellows decreases.
Fig. 14 is a schematic structural view of a closure driving mechanism according to a fourth embodiment of the present invention. This embodiment differs from the third embodiment in that in this embodiment the driving portion 61 is located outside the cylinder 71, and the inner wall of the cylinder 71 encloses the cavity.
Fig. 15 is a schematic structural view of a closing driving mechanism according to a fifth embodiment of the present invention. This embodiment differs from the first embodiment in that the driving part 61 includes a first driving member 62 and a second driving member 64 connected, the first driving member 62 being connected to the closing tab 12, and the second driving member 64 being connected to the proximal end side of the cylinder 71. The first driving member 62 is located at the distal end side of the cylinder 71, and the first driving member 62 and the second driving member 64 are connected by a connecting rod 65. The first compression spring 63 is provided between the proximal end side of the first driving member 62 and the cylinder 71, and may be sleeved on the connection rod 65. When the second driving member 64 moves toward the proximal end side of the stapler, the first driving member 62 is pulled to move toward the proximal end side of the stapler, and the first driving member 62 compresses the first compression spring 63 to deform. After the pulling force of the pull cord 51 applied to the second driving member 64 to the proximal side is removed, the first driving member 62 moves to the distal side by the deformation restoring force of the first compression spring 63, and drives the pull tab 12 and the second driving member 64 to move to the distal side of the stapler. In the fifth embodiment, the cylinder 71 and the second driving member 64 may be provided in at least two groups, the first driving member 61 is fixedly connected to a plurality of the second driving members 64 at the same time, and the plurality of check valves 73 are respectively provided in the cavity portions 74 of the respective cylinders 71.
In other alternative embodiments, the second driving member 64 may be located outside the cylinder 71, and in other alternative embodiments, the first driving member 62 may be located inside the cylinder 71, with the first compression spring 63 disposed on the proximal side of the second driving member 64, which is within the scope of the present invention.
Fig. 16 is a schematic structural view of a closing driving mechanism according to a sixth embodiment of the present invention. This embodiment differs from the fifth embodiment in that the pull tab 12 and the second driver 64 are not coaxially disposed and the first driver 62 may be fixedly coupled to the side wall of the second driver 64. In this embodiment, the working principle of the first driving member 62 and the second driving member 64 is the same as that of the embodiment shown in fig. 15, and will not be described here.
The closing driving mechanism and the medical anastomat comprising the same provided by the invention have the following advantages:
The invention provides a closed driving mechanism for a medical anastomat, which is provided with a cylinder body matched with a driving part, wherein the side wall of the cylinder body is made of flexible or elastic materials, the cylinder body can be lengthened or shortened under the driving of the driving part, the volume change of a cavity part in the cylinder body is caused, and the opening and the closing of a communication channel between the cavity part and outside air are controlled through a one-way valve; when the nail head is closed and driven, the side wall of the cylinder body is elongated along the axial direction to increase the volume of the cavity, the one-way valve is opened to charge air into the cavity, the driving part drives the pull tab to move towards the proximal end side of the anastomat to drive the nail head to be closed, after the firing of the anastomat is completed, the side wall of the cylinder body is shortened along the axial direction to reduce the volume of the cavity, the one-way valve is closed, air in the cavity is compressed, the driving part is subjected to the resistance of compressed air to slow down the movement towards the distal end side of the anastomat, so that the nail head can be slowly opened, and the damage to surrounding tissues caused by the overlarge force of opening the jaws is avoided.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (13)
Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806840.XA CN112438766B (en) | 2019-08-29 | 2019-08-29 | Closed driving mechanism and medical stapler including the same |
| BR112022002758A BR112022002758A2 (en) | 2019-08-29 | 2020-08-27 | CLOSING DRIVE MECHANISM AND MEDICAL STAPLER INCLUDING THE SAME |
| AU2020335820A AU2020335820B2 (en) | 2019-08-29 | 2020-08-27 | Closure driving mechanism and medical stapler including the same . |
| JP2022512732A JP7345056B2 (en) | 2019-08-29 | 2020-08-27 | Closing drive mechanism and medical stapler including the same |
| PCT/CN2020/111792 WO2021037154A1 (en) | 2019-08-29 | 2020-08-27 | Closing driving mechanism and medical stapler comprising same |
| US17/634,783 US11980361B2 (en) | 2019-08-29 | 2020-08-27 | Closure driving mechanism and medical stapler including the same |
| KR1020227008262A KR102706595B1 (en) | 2019-08-29 | 2020-08-27 | Closing drive mechanism and medical stapler including same |
| EP20856653.9A EP4023169A4 (en) | 2019-08-29 | 2020-08-27 | CLOSURE DRIVE DEVICE AND MEDICAL STAPLE DEVICE THEREFOR |
| CA3151254A CA3151254A1 (en) | 2019-08-29 | 2020-08-27 | Closure driving mechanism and medical stapler including the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910806840.XA CN112438766B (en) | 2019-08-29 | 2019-08-29 | Closed driving mechanism and medical stapler including the same |
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| CN112438766A CN112438766A (en) | 2021-03-05 |
| CN112438766B true CN112438766B (en) | 2025-02-11 |
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| CN201910806840.XA Active CN112438766B (en) | 2019-08-29 | 2019-08-29 | Closed driving mechanism and medical stapler including the same |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210990509U (en) * | 2019-08-29 | 2020-07-14 | 天臣国际医疗科技股份有限公司 | Closing drive mechanism and medical stapler including the same |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5339723A (en) * | 1993-09-30 | 1994-08-23 | Ethicon, Inc. | Pressurized fluid actuation system for amplifying operator input force in a surgical instrument |
| US6830174B2 (en) * | 2000-08-30 | 2004-12-14 | Cerebral Vascular Applications, Inc. | Medical instrument |
| US7140528B2 (en) * | 2003-05-20 | 2006-11-28 | Ethicon Endo-Surgery, Inc. | Surgical stapling instrument having an electroactive polymer actuated single lockout mechanism for prevention of firing |
| US8360297B2 (en) * | 2006-09-29 | 2013-01-29 | Ethicon Endo-Surgery, Inc. | Surgical cutting and stapling instrument with self adjusting anvil |
| US9192431B2 (en) * | 2010-07-23 | 2015-11-24 | Ethicon Endo-Surgery, Inc. | Electrosurgical cutting and sealing instrument |
| US20170296173A1 (en) * | 2016-04-18 | 2017-10-19 | Ethicon Endo-Surgery, Llc | Method for operating a surgical instrument |
| CN106175863B (en) * | 2016-06-22 | 2019-02-01 | 屈秀峰 | Alimentary canal internal medicine anastomat device |
| CN106821440A (en) * | 2017-02-28 | 2017-06-13 | 苏州法兰克曼医疗器械有限公司 | A kind of pneumatic stapler and its drive device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN210990509U (en) * | 2019-08-29 | 2020-07-14 | 天臣国际医疗科技股份有限公司 | Closing drive mechanism and medical stapler including the same |
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