CN111317535B - Circular tube type anastomat - Google Patents
Circular tube type anastomat Download PDFInfo
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- CN111317535B CN111317535B CN201811533190.8A CN201811533190A CN111317535B CN 111317535 B CN111317535 B CN 111317535B CN 201811533190 A CN201811533190 A CN 201811533190A CN 111317535 B CN111317535 B CN 111317535B
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- nail
- anvil shaft
- firing
- stapler
- proximal end
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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
- A61B17/1114—Surgical instruments, devices or methods for performing anastomosis; Buttons for anastomosis of the digestive tract, e.g. bowels or oesophagus
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B2017/0046—Surgical instruments, devices or methods with a releasable handle; with handle and operating part separable
-
- 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
本发明提供了一种圆管型吻合器，其中包括吻合器本体，吻合器本体包括推钉片、推钉杆和钉砧轴，钉砧轴依次穿设于推钉片和推钉杆中，钉砧轴包括远端外径较小的的第一钉砧轴部和近端外径较大的第二钉砧轴部。通过采用本发明，在钉砧组件和钉仓之间的距离未达到合适位置时，推钉片上的击发片的远端位于第二钉砧轴部上，推钉杆与推钉片是不联动的，即使握动操作把手，推钉杆也不会推动推钉片，也就不会击发吻合器，只有当钉砧组件相对于钉仓移动至合适位置时，推钉杆与推钉片联动，推钉杆可以推动推钉片进行吻合器的击发；从而在保证正常工作的前提下，防止在手术未准备好时的误击发，提高了器械使用的安全性。
The present invention provides a circular tube type stapler, which includes a stapler body, the stapler body includes a nail pushing piece, a nail pushing rod and a nail anvil shaft, the nail anvil shaft is sequentially inserted in the nail pushing piece and the nail pushing rod, and the nail anvil shaft includes a first nail anvil shaft portion with a smaller outer diameter at the distal end and a second nail anvil shaft portion with a larger outer diameter at the proximal end. By adopting the present invention, when the distance between the nail anvil assembly and the nail magazine does not reach a suitable position, the distal end of the firing piece on the nail pushing piece is located on the second nail anvil shaft portion, the nail pushing rod and the nail pushing piece are not linked, even if the operating handle is gripped, the nail pushing rod will not push the nail pushing piece, and the stapler will not be fired. Only when the nail anvil assembly moves to a suitable position relative to the nail magazine, the nail pushing rod and the nail pushing piece are linked, and the nail pushing rod can push the nail pushing piece to fire the stapler; thereby, under the premise of ensuring normal operation, misfiring when the operation is not ready is prevented, thereby improving the safety of the instrument.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a circular tube type anastomat.
Background
The digestive tract disease is one of the diseases of high incidence of human beings, and in the treatment process, a circular tube type anastomat is often used for anastomosing physiological tissues such as the digestive tract instead of manual operation of doctors. The circular tube type anastomat is a common surgical instrument, and most of the circular tube type anastomat adopts an axial inner stapling mode, forms end-to-end or end-to-side anastomosis on physiological tissues such as esophagus, stomach, intestinal canal and the like during operation, is accommodated in the anastomat in a astringing way during anastomosis, forms a circular anastomosis opening on the tissues after the completion of percussion, and reconstructs a human body channel.
In the prior art, the circular tube type anastomat comprises an anastomat body, an operating handle movably connected with the anastomat body and a nail anvil component matched with the body. The anastomat body comprises a nail bin assembly arranged at the far end, wherein the nail bin assembly comprises an annular nail bin and a cutter, and a knob arranged at the near end of the body, the knob can rotate relative to the body, and the inside of the anastomat body also comprises a nail anvil shaft arranged from the near end to the far end. The distal and proximal ends are here the proximal ends with respect to the operator, the ends closer to the operator being the proximal ends, the ends further from the operator, i.e. the ends closer to the surgical site being the distal ends. In the anastomat, the inner side and the outer side are opposite to the axis of the anastomat, one side close to the axis is the inner side, and one side far away from the axis is the outer side. The nail anvil assembly comprises a nail anvil, a nail anvil cap arranged at the far end of the nail anvil and a knife anvil arranged inside the nail anvil, and the nail anvil assembly can be directly connected with the far end of the nail anvil shaft or connected with the far end of the nail anvil shaft through a nail anvil shaft connecting piece. In the tumor operation process, after tumor tissues are removed by separation, the nail anvil shaft penetrates out of the purse of the residual tissues and is configured at the far end of the anastomat body, and the knob is rotated, so that the distance between the nail anvil assembly and the nail bin is gradually reduced to reach a proper distance, and then the nail anvil assembly and the nail bin can be in a firing state, and then the operation handle firing instrument can be held to complete anastomosis. Along with the continuous development of medical instruments, the circular tube type anastomat is also widely applied to the treatment of hemorrhoids and other diseases.
As mentioned above, in both oncologic and hemorrhoid procedures, it is necessary to rotate the knob to bring the anvil assembly and the cartridge to a suitable distance before firing the stapler. However, when a circular tube type stapler is actually used for performing an operation, an operator may inadvertently grasp the operating handle to cause false firing when the distance between the anvil assembly and the staple cartridge does not reach a proper position, thereby causing operation failure and possibly even causing medical accidents.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a circular tube type anastomat, when the distance between a nail anvil component and a nail bin does not reach a proper position, even if an operating handle is held, a nail pushing rod can not push a nail pushing sheet, and false firing can not be caused.
The embodiment of the invention provides a circular tube type anastomat, which comprises an anastomat body, wherein the anastomat body comprises a nail pushing rod, a nail pushing sheet and a nail bin assembly which are sequentially arranged from the proximal end to the distal end of the anastomat body, and the nail pushing sheet comprises at least one firing sheet;
The anastomat body further comprises a nail anvil shaft, the nail anvil shaft sequentially penetrates through the nail pushing plate and the nail pushing rod, the nail anvil shaft comprises a first nail anvil shaft part arranged at the far end of the nail anvil shaft part and a second nail anvil shaft part arranged at the near end of the nail anvil shaft part, the outer diameter of the first nail anvil shaft part is smaller than the outer diameter of the second nail anvil shaft part, and the nail anvil shaft can move along the axial direction of the anastomat;
The distal end of the firing plate is positioned at the second nail anvil shaft part, the nail pushing rod is not linked with the firing plate, the anastomat can not fire, and the distal end of the firing plate is positioned at the first nail anvil shaft part, the nail pushing rod is linked with the firing plate, and the anastomat can fire.
Optionally, a boss is disposed on an inner wall of the distal end of the firing plate, and the boss of the firing plate is in contact with the anvil shaft.
Optionally, the nail pushing plate further comprises a nail pushing part, the distal end of the firing plate is connected with the proximal end of the nail pushing part, and the distal end of the firing plate is an elastic part.
Optionally, when the distal end of the firing plate is located at the second anvil shaft portion, the proximal end of the firing plate opens axially outward relative to the anvil to form a cavity with the anvil shaft, and when the ejector pin moves from the proximal end of the stapler to the distal end, the ejector pin enters the cavity;
when the distal end of the firing sheet is positioned at the first nail anvil shaft part, the proximal end of the firing sheet is folded relative to the axial inner side of the nail anvil and contacted with the proximal end of the firing sheet to be linked.
Optionally, the proximal end of the firing plate includes a first mating portion, and the distal end of the staple pushing rod includes a second mating portion, where the first mating portion mates with the second mating portion when the proximal end of the firing plate is folded axially inward relative to the anvil.
Optionally, the first matching part comprises a protrusion facing the nail anvil shaft, the second matching part comprises a groove corresponding to the protrusion, and when the proximal end of the firing sheet is folded inwards relative to the axial direction of the nail anvil, the protrusion of the firing sheet is embedded in the groove of the nail pushing rod.
Optionally, the recess of the distal end of the staple pusher bar includes a plurality of recesses in one-to-one correspondence with the firing plates.
Optionally, the groove of the distal end of the ejector pin is a concave ring surrounding the ejector pin.
Optionally, the second matching part comprises a protrusion facing to the outer side, the first matching part comprises a groove corresponding to the protrusion, and when the proximal end of the firing sheet is folded relative to the axial inner side of the nail anvil, the protrusion of the nail pushing rod is embedded in the groove of the firing sheet.
Optionally, a connecting portion is disposed between the first anvil shaft portion and the second anvil shaft portion, and a surface of the connecting portion is a transition surface.
Optionally, the stapler further comprises an operating handle pivotally connected to the stapler body, and pressing the operating handle drives the ejector pin to move from the proximal end of the stapler to the distal end.
Optionally, the stapler body further includes a knob located at a proximal end of the stapler body, the knob is connected to a proximal end of the anvil shaft through a screw rod assembly, and when the knob rotates, the screw rod assembly drives the anvil shaft to move along an axial direction of the stapler.
The circular tube type anastomat provided by the invention has the following advantages:
The invention provides a circular tube type anastomat, wherein when the distance between a nail anvil assembly and a nail bin does not reach a proper position, the distal end of a firing plate on a nail pushing plate is sleeved on a second nail anvil shaft part with a larger outer diameter, at the moment, the nail pushing rod and the nail pushing plate are not linked, even if an operation handle is held, the nail pushing rod can not push the nail pushing plate, the false firing of the anastomat can not be caused, when the nail anvil assembly moves to a proper position relative to the nail bin, the distal end of the firing plate is sleeved on a first nail anvil shaft part with a smaller outer diameter, the nail pushing rod is linked with the nail pushing plate, at the moment, if the operation handle is held, the nail pushing rod can push the nail pushing plate to fire, so that the false firing when an operation is not ready is prevented, and the use safety of the anastomat is improved.
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 stapler according to an embodiment of the present invention;
FIG. 2 is a schematic view of a stapler with one side housing removed, according to an embodiment of the present invention;
FIG. 3 is a schematic illustration of a pointer mated with a pull tab according to an embodiment of the present invention;
FIG. 4 is a schematic view of an anvil shaft according to an embodiment of the present invention;
FIG. 5 is an enlarged view at A in FIG. 4;
FIG. 6 is a schematic view of the structure of a staple pusher according to an embodiment of the present invention;
FIG. 7 is a schematic view of the cooperation of the ejector pin blade and ejector pin in an initial state in accordance with one embodiment of the present invention;
FIG. 8 is a schematic illustration of the engagement of the ejector blade and ejector pin in a fail-safe mode in accordance with one embodiment of the present invention;
FIG. 9 is a schematic view of a push rod and push plate in accordance with an embodiment of the present invention.
Reference numerals:
1. stapler body housing 52 screw assembly
2. Nail cartridge assembly 53 pointer
3. Push pin 54 pull tab
31. Nail anvil shaft of nail pushing part 6
32. First anvil shaft portion of firing plate 61
321. Boss 62 second anvil shaft portion
322. Connection part of the protrusion 63
4. Operating handle of nail pushing rod 7
41. Groove 8 nail anvil assembly
42. Proximal 81 anvil of ejector pin
51. Knob 82 nail anvil shaft connector
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 circular tube type anastomat, which comprises an anastomat body, wherein the anastomat body comprises a nail pushing rod, a nail pushing sheet and a nail bin assembly which are sequentially arranged from a proximal end to a distal end, the anastomat body also comprises a nail anvil shaft which is arranged from the proximal end to the distal end of the anastomat body, the nail pushing sheet comprises at least one firing sheet, the nail anvil shaft sequentially penetrates through the nail pushing sheet and the nail pushing rod, the nail anvil shaft comprises a first nail anvil shaft part positioned at the distal end of the nail anvil shaft and a second nail anvil shaft part positioned at the proximal end of the nail anvil shaft, the outer diameter of the first nail anvil shaft part is smaller than the outer diameter of the second nail anvil shaft part, and the nail anvil shaft can move along the axial direction of the anastomat.
Further, the stapler can also include an anvil assembly including an anvil that can be coupled to the distal end of the anvil shaft via an anvil shaft connector, and the anvil can also be coupled directly to the distal end of the anvil shaft. When the nail anvil shaft moves along the axial direction of the anastomat, the nail anvil component is driven to move along the axial direction of the anastomat, so that the nail anvil component is far away from or close to the nail bin.
When the distal end of the firing plate is positioned at the second nail anvil shaft part, the nail pushing rod is not linked with the firing plate, and the anastomat can not fire;
When the distal end of the firing plate is positioned at the first nail anvil shaft part, the nail pushing rod is linked with the firing plate, and the anastomat can fire.
Specifically, in an embodiment of the present invention, when the anvil assembly of the tubular stapler and the stapler body are in an initial state of just successful butt joint, the distance between the anvil assembly and the staple cartridge is larger, at this time, the distance between the anvil assembly and the staple cartridge does not reach a proper position, the distal end of the firing plate is sleeved on the second anvil shaft portion, the proximal end of the firing plate opens to the outer side of the anvil shaft to form a cavity with the anvil shaft, and when the firing rod moves from the proximal end of the stapler to the distal end, the firing rod enters the cavity formed by the proximal end of the firing plate, at this time, the acting force of the handle cannot act on the firing rod through the firing rod, so that the firing rod and the firing rod with the firing plate are not linked, at this time, even if an operator accidentally presses the handle to fire the firing rod, the firing of the stapler cannot be caused, and thus the false firing of the stapler when the operation is not ready to be completed is avoided.
When operation preparation is carried out, the rotary knob is rotated to enable the nail anvil shaft to drive the nail anvil assembly to move towards the proximal end direction of the anastomat, when the distance between the nail anvil assembly and the nail bin reaches a proper position, the distal end of the firing sheet moves from the second nail anvil shaft part to the first nail anvil shaft part, the proximal end of the firing sheet is folded relative to the inner side of the nail anvil shaft direction, and when the nail pushing rod moves towards the distal end direction from the proximal end of the anastomat, the nail pushing rod contacts with the proximal end of the firing sheet and then is linked with the firing sheet, and at the moment, if an operator pushes the handle to fire the nail pushing rod, the anastomat can be fired, so that the normal function of the anastomat is realized. The force of the handle can be transmitted to the nail pushing sheet through the firing bar during linkage, so that the nail pushing sheet moves to the far end.
The structure of the circular tube type anastomat according to one embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 and 2, the structure of the stapler according to an embodiment of the present invention is shown, wherein in fig. 2, one side of the stapler housing is removed and the cartridge assembly is shown separated from the stapler body in order to more clearly show the structure inside the stapler. The anastomat comprises an anastomat body and a nail anvil assembly 8, wherein the anastomat body comprises an anastomat shell 1 and a nail bin assembly 2 positioned at the far end of the anastomat shell 1, the nail bin assembly 2 comprises an annular nail bin and a cutter, the nail bin assembly 2 is provided with a nail pushing sheet 3 and a nail pushing rod 4, and the nail pushing sheet 3 is positioned at the far end of the nail pushing rod 4. When the nail pushing rod 4 is linked with the nail pushing plate 3, the movement of the nail pushing rod 4 to the distal end of the anastomat can drive the nail pushing plate 3 to move to the distal end direction of the anastomat, and when the nail pushing plate 3 moves to the distal end direction of the anastomat, the anastomat and the cutter in the nail bin assembly 2 can be pushed out to anastomose and cut tissues. The anastomat body further comprises a pin anvil shaft 6 which is arranged from the proximal end to the distal end, and the pin anvil shaft 6 is penetrated in the pin pushing rod 4 and the pin pushing sheet 3. In one type of tubular stapler, the anvil assembly 8 includes an anvil shaft connector 82 and an anvil 81 disposed at a distal end of the anvil shaft connector 82, and a proximal end of the anvil shaft connector 82 is connectable to a distal end of the anvil shaft 6. When the anvil assembly 8 is docked with the stapler body, the anvil shaft connector 82 may drive the anvil 81 to move in the axial direction of the anvil shaft connector 82, thereby bringing the anvil assembly 8 closer to or farther from the cartridge assembly 2.
Of course, in another type of tubular stapler, such as the tubular stapler for hemorrhoid surgery described above, the anvil assembly 8 is directly connected to the stapler body, and the anvil assembly 8 cannot be removed from the stapler body, i.e. the anvil assembly 8 does not include the anvil shaft connector 82, and the anvil 81 is directly connected to the distal end of the anvil shaft 6. The present invention will be described with reference to such a stapler.
In the present invention, the distal end and the proximal end are the proximal end with respect to the operator, and the end farther from the operator, i.e., the end closer to the surgical site is the distal end. That is, in this embodiment, since the operator is holding the handle to operate the stapler when using, the end that is biased to the right is the proximal end and the end that is biased to the left is the distal end in the view of fig. 1 and 2. For example, the proximal end 42 of the ejector pin 4 is the end that is offset to the right with respect to the distal end of the ejector pin 4 for the ejector pin 4, and the proximal end of the ejector pin 3 is the end that is offset to the right with respect to the distal end of the ejector pin 3 for the ejector pin 3.
In this embodiment, the stapler further comprises an operating handle 7 pivotally connected to the stapler body, the distal end of the operating handle 7 corresponds to the proximal end of the ejector pin 4, and the rotary motion of the operating handle 7 towards the stapler body can drive the ejector pin 4 to move in a distal direction from the proximal end of the stapler.
The proximal end of the stapler body is further provided with a knob 51, and the knob 51 is connected with the proximal end of the anvil shaft 6 through a screw rod assembly 52. When the knob 51 rotates, the screw rod assembly 52 drives the anvil shaft 6 to axially move relative to the stapler body.
The structure of the circular tube type anastomat shown in fig. 1-2 is only an example, and in practical application, the structure of the circular tube type anastomat is not limited to the structure shown in the drawings, and other forms can be adopted, so that the firing of the anastomat can be realized, and the structure is within the protection scope of the invention.
Further, in this embodiment, as shown in fig. 3, the stapler body further includes a pointer 53 and a pull tab 54 positioned within the stapler body, wherein a proximal end of the pull tab 54 is coupled to the lead screw assembly 52 for movement in the axial direction of the lead screw as the lead screw assembly 52 moves. The distal end of the pull tab 54 is opposite the first end of the pointer 53, the first end of the pointer 53 having a first location area and a second location area, where the first end of the pointer 53 refers to the upper end of the pointer 53 in fig. 3. The pointer 53 is pivotally secured to the stapler housing 1, and the first end of the pointer 53 is movable between a first position area and a second position area when rotated.
In this embodiment, when the knob 51 is rotated in a first direction, the lead screw assembly 52 moves the pull tab 54 in a proximal direction of the stapler body, and the distal end of the pull tab 54 pulls the first end of the pointer 53 from the first position area to the second position area. In practice, the first position zone is generally referred to as the initial position zone of the pointer 53, where the distance between the cartridge assembly 2 and the anvil assembly 8 is relatively long and is not in place, and is therefore also an unfired zone, and as the knob 51 is rotated in the first direction, the anvil shaft 6 pulls the anvil 81 toward the stapler so that the distance between the anvil 81 and the cartridge assembly 2 is in place, where the pointer 53 is also pulled by the pull tab 54 to a second position zone, where the operator is allowed to fire the stapler, and the second position zone is also referred to as a cockable zone. Thus, the pointer 53 may be used as an indication of the position of the anvil shaft 6 to indicate whether the stapler has completed surgical preparation, allowing firing.
The manner in which the anvil shaft 6 is moved and the manner in which the position is indicated is merely exemplary and is not intended to be limiting of the invention. For example, the axial movement of anvil shaft 6 may be driven by other means, not necessarily using knob 51 and screw assembly 52 of the present invention, nor does the position of anvil shaft 6 necessarily use pointer 53 to indicate, or may use other means to indicate whether anvil shaft 6 and anvil 81 have reached a cocked position, or not visually.
To avoid the stapler being misfiring when anvil 81 is not moved into place. The invention further improves the anvil shaft 6, the ejector blade 3 and the ejector pin 4. As shown in fig. 5, in this embodiment, the anvil shaft 6 includes a first anvil shaft portion 61 and a second anvil shaft portion 62, the first anvil shaft portion 61 being located at the distal end of the anvil shaft 6 and the second anvil shaft portion 62 being located at the proximal end of the anvil shaft 6. And the outer diameter D1 of the first anvil shaft portion 61 is smaller than the outer diameter D2 of the second anvil shaft portion 62. As shown in fig. 6, the ejector blade 3 includes an ejector pin portion 31 at a distal end of the ejector blade 3 and at least one firing plate 32 at a proximal end of the ejector blade 3. The distal end of the firing plate 32 is connected to the proximal end of the staple pusher 31. In this embodiment, the staple pushing portion 31 and the firing plate 32 are integrally formed, but the present invention is not limited thereto. The number of firing plates 32 may be selected as desired, such as two, four, six, etc., and are within the scope of the present invention. The area where the first anvil shaft portion 61 and the second anvil shaft portion 62 interface is indicated as a region a in fig. 4 and 5.
Since the outer diameter D1 of the first anvil shaft portion 61 is smaller than the outer diameter D2 of the second anvil shaft portion 62, the distal end of the firing tab 32 will assume different positions when it is sleeved over the first anvil shaft portion 61 and over the second anvil shaft portion 62. As shown in fig. 5, in this embodiment, a connection portion 63 may be further included between the first anvil shaft portion 61 and the second anvil shaft portion 62, and a surface of the connection portion 63 may be a transition slope inclined toward the second anvil shaft portion 62. The connecting portion 63 is adapted to guide the movement of the blade 3 between the first anvil shaft portion 61 and the second anvil shaft portion 62. The connection portion 63 is not limited to the inclined surface, and may have other shapes such as an arc surface, etc. that can perform a transition function.
The state of the stapler when the distal end of the firing blade 32 is sleeved over the first anvil shaft portion 61 and over the second anvil shaft portion 62 is described below with reference to fig. 7-9 (anvil omitted).
As shown in fig. 7, the area a where the first anvil shaft portion 61 and the second anvil shaft portion 62 meet is located on the left side of the ejector blade 3. When the distal end of the firing plate 32 is sleeved on the second anvil shaft 62, the firing plate 32 is spread due to the larger outer diameter D2 of the second anvil shaft 62, and the proximal end of the firing plate 32 is spread outwards relative to the anvil shaft 6. In this embodiment, a boss 321 facing the axial direction of the anvil shaft 6 is further provided at the distal end of the firing plate 32, and the boss 321 contacts the second anvil shaft 62 to spread the proximal end of the firing plate 32 outward.
As shown in fig. 8, in the state of fig. 7, if the ejector pin 4 moves in the distal direction from the proximal end of the stapler, the ejector pin 4 enters the cavity between the proximal end of the firing plate 3 and the anvil shaft 6, i.e., is in a fail-safe mode, and even if the operator carelessly pushes the handle 7 to push the ejector pin 4 to move in the distal direction from the proximal end of the stapler, the ejector plate 3 is not pushed to fire the stapler, thereby forming a fail-safe state.
As shown in fig. 9, in contrast to the state of fig. 7, the anvil shaft 6 is moved relative to the stapler body in the proximal direction of the stapler body, wherein the area a, where the first anvil shaft portion 61 and the second anvil shaft portion 62 meet, enters the interior of the ejector blade 3. The distal end of the firing plate 32 reaches the first anvil shaft portion 61 from the second anvil shaft portion 62, the boss 321 of the distal end of the firing plate 32 contacts with the first anvil shaft portion 61, and because the outer diameter D1 of the first anvil shaft portion 61 is smaller, the proximal end of the firing plate 32 is folded inwards relative to the anvil shaft 6, and enters the path of the distal movement of the ejector pin 4 from the proximal end to the distal end, when the ejector pin 4 moves from the proximal end to the distal end of the stapler, the ejector pin 4 contacts with the proximal end of the firing plate 32 and then is linked with the firing plate 32, and at this time, the handle 7 is pressed, so that the ejector pin 3 can be driven by the ejector pin 4 to complete the firing of the stapler.
In this embodiment, the portion of the distal end of the firing plate 32 that is connected to the staple pushing portion 31 is an elastic portion to allow the proximal end of the firing plate 32 to open and close relative to the anvil shaft 6. Or the distal end of the firing plate 32 may be pivotally connected to the proximal end of the staple pushing portion 31, i.e., the distal end of the firing plate 32 may be rotatable about a rotational axis relative to the proximal end of the staple pushing portion 31, thereby effecting the opening and closing of the proximal end of the firing plate 32 relative to the anvil shaft 6. Other means of connection between the firing plate 32 and the staple pusher 31 are within the scope of the present invention. It will be appreciated that the staple pusher 3 is generally strong to provide stable force transmission for the firing of the stapler.
In this embodiment, if the position of the anvil shaft 6 is indicated by the pointer 53, the distal end of the firing plate 32 is sleeved on the second anvil shaft 62 when the first end of the pointer 53 is located in the first position area, and the stapler is in a fail-safe state when the first end of the pointer 53 moves from the first position area to the second position area, the anvil shaft 6 moves toward the proximal end of the stapler body, so that the distal end of the firing plate 32 moves from the second anvil shaft 62 to the first anvil shaft 61, and the stapler can be normally fired when the handle 7 is pressed.
There are a wide variety of ways in which the proximal end of the firing plate 32 and the distal end of the push rod 4 can be mated. In this embodiment, the proximal end of the firing plate 32 includes a first mating portion, and the distal end of the staple pusher 4 includes a second mating portion, and when the proximal end of the firing plate 32 is folded inward relative to the anvil shaft 6, the first mating portion is engaged with the second mating portion, so as to realize the linkage between the staple pusher 4 and the firing plate 32 and thus the staple pusher 3.
In this embodiment, the first mating portion includes a protrusion 322 facing the anvil shaft 6, the second mating portion includes a recess 41 corresponding to the protrusion 322, and the protrusion 322 of the firing plate 32 is embedded in the recess 41 of the ejector pin 4 when the proximal end of the firing plate 32 is folded inward relative to the anvil shaft 6. The recess 41 at the distal end of the staple pusher bar 4 may include a plurality of recesses 41 in one-to-one correspondence with the firing plates 32, each recess 41 may be formed slightly larger than the protrusion 322 of the firing plate 32. In other embodiments, the recess 41 of the distal end of the ejector pin 4 may be provided directly as a recessed ring surrounding the ejector pin 4.
In other embodiments, the second mating portion may also include an outward facing protrusion, and the first mating portion includes a groove corresponding to the protrusion. That is, in contrast to the previous embodiment, the protrusions are provided on the staple pusher bar and the recesses are provided on the firing plate. When the proximal end of the firing sheet is folded relative to the axial inner side of the nail anvil, the protrusion of the nail pushing rod is embedded in the groove of the firing sheet.
The circular tube type anastomat provided by the invention has the following advantages:
The invention provides a circular tube type anastomat, wherein when the distance between a nail anvil assembly and a nail bin does not reach a proper position, the distal end of a firing plate is sleeved on a second nail anvil shaft part with a larger outer diameter, the proximal end of the firing plate is propped up and separated from a nail pushing rod, at the moment, the nail pushing rod and the nail pushing plate are not linked, even if an operation handle is held, the nail pushing rod can not push the nail pushing plate and can not cause false firing, when the nail anvil assembly moves to a proper position relative to the nail bin, the distal end of the firing plate is sleeved on a first nail anvil shaft part with a smaller outer diameter, and the proximal end of the firing plate is folded and contacted and matched with the nail pushing rod, so that the nail pushing rod is linked with the nail pushing plate.
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 (11)
1. The circular tube type anastomat is characterized by comprising an anastomat body, wherein the anastomat body comprises a nail pushing rod, a nail pushing sheet and a nail bin assembly which are sequentially arranged from the proximal end to the distal end of the anastomat body, and the nail pushing sheet comprises at least one firing sheet;
The anastomat body further comprises a nail anvil shaft, the nail anvil shaft sequentially penetrates through the nail pushing plate and the nail pushing rod, the nail anvil shaft comprises a first nail anvil shaft part arranged at the far end of the nail anvil shaft part and a second nail anvil shaft part arranged at the near end of the nail anvil shaft part, the outer diameter of the first nail anvil shaft part is smaller than the outer diameter of the second nail anvil shaft part, and the nail anvil shaft can move along the axial direction of the anastomat;
when the distal end of the firing sheet is positioned at the second nail anvil shaft part, the proximal end of the firing sheet is opened to the outer side of the nail anvil shaft to form a cavity with the nail anvil shaft, the nail pushing rod enters the cavity when moving from the proximal end of the anastomat to the distal end direction, the nail pushing rod is not linked with the firing sheet, the anastomat can not fire, and when the distal end of the firing sheet is positioned at the first nail anvil shaft part, the proximal end of the firing sheet is folded to the inner side of the nail anvil shaft direction to contact with the proximal end of the firing sheet to be linked, and the anastomat can fire.
2. The tubular stapler of claim 1, wherein the inner wall of the distal end of the firing tab is provided with a boss, and the boss of the firing tab is in contact with the anvil shaft.
3. The tubular stapler of claim 1, wherein the staple pusher further comprises a staple pusher, wherein the distal end of the firing tab is connected to the proximal end of the staple pusher, and wherein the distal end of the firing tab is an elastic portion.
4. The tubular stapler of claim 1, wherein the proximal end of the firing blade includes a first mating portion and the distal end of the staple pusher bar includes a second mating portion, the first mating portion engaging the second mating portion when the proximal end of the firing blade is folded axially inward relative to the anvil.
5. The tubular stapler of claim 4, wherein the first mating portion includes a protrusion toward the anvil shaft, the second mating portion includes a recess corresponding to the protrusion, and the protrusion of the firing tab is embedded in the recess of the staple pusher when the proximal end of the firing tab is folded axially inward relative to the anvil.
6. The tubular stapler of claim 5, wherein the recess of the distal end of the staple pusher bar comprises a plurality of recesses in one-to-one correspondence with the firing plates.
7. The tubular stapler of claim 5, wherein the recess of the distal end of the push rod is a recessed ring surrounding the push rod.
8. The tubular stapler of claim 4, wherein the second mating portion includes an outward facing protrusion, the first mating portion includes a recess corresponding to the protrusion, and the protrusion of the staple pusher bar is embedded in the recess of the firing blade when the proximal end of the firing blade is folded axially inward relative to the anvil.
9. The tubular stapler of claim 1, wherein a connecting portion is provided between the first anvil shaft portion and the second anvil shaft portion, and a surface of the connecting portion is a transition surface.
10. The tubular stapler of claim 1, further comprising an operating handle pivotally connected to the stapler body, wherein depressing the operating handle drives the staple pusher to move in a distal direction from the proximal end of the stapler.
11. The tubular stapler of claim 1, wherein the stapler body further comprises a knob at a proximal end of the stapler body, the knob being coupled to the proximal end of the anvil shaft by a screw assembly, the knob being configured to move the anvil shaft in an axial direction of the stapler by the screw assembly when rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811533190.8A CN111317535B (en) | 2018-12-14 | 2018-12-14 | Circular tube type anastomat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811533190.8A CN111317535B (en) | 2018-12-14 | 2018-12-14 | Circular tube type anastomat |
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| CN111317535A CN111317535A (en) | 2020-06-23 |
| CN111317535B true CN111317535B (en) | 2025-03-14 |
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| CN114948035B (en) * | 2021-02-23 | 2024-08-16 | 苏州英途康医疗科技有限公司 | Tubular anastomat |
| CN115245364B (en) * | 2021-04-25 | 2024-08-16 | 苏州英途康医疗科技有限公司 | Tubular anastomat |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209529231U (en) * | 2018-12-14 | 2019-10-25 | 苏州天臣国际医疗科技有限公司 | Circular-pipe anastomat |
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| US8181840B2 (en) * | 2004-03-19 | 2012-05-22 | Tyco Healthcare Group Lp | Tissue tensioner assembly and approximation mechanism for surgical stapling device |
| KR100769681B1 (en) * | 2006-05-15 | 2007-10-23 | 고려대학교 산학협력단 | Circular anastomizer |
| CN201167991Y (en) * | 2008-01-25 | 2008-12-24 | 苏州天臣国际医疗科技有限公司 | Automatic Insurance Surgical Binding Instruments |
| CN101856252A (en) * | 2010-06-10 | 2010-10-13 | 苏州天臣国际医疗科技有限公司 | Anastomat for minimally invasive surgery |
| CN103142274B (en) * | 2012-12-27 | 2016-09-14 | 苏州天臣国际医疗科技有限公司 | Circular-pipe anastomat |
| CN204839621U (en) * | 2015-07-23 | 2015-12-09 | 苏州天臣国际医疗科技有限公司 | Tubular type anastomat and integral type transmission lead screw thereof |
| WO2018140066A1 (en) * | 2017-01-25 | 2018-08-02 | Covidien Lp | Circular stapling device and method of use |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209529231U (en) * | 2018-12-14 | 2019-10-25 | 苏州天臣国际医疗科技有限公司 | Circular-pipe anastomat |
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