CN218186861U - Anorectal anastomat - Google Patents

Abstract

The utility model relates to an anus intestines anastomat, include: the surgical stapler comprises a shell and a nail bin, wherein the nail bin is provided with a nail outlet hole for accommodating and guiding the discharge of the anastomotic nails and a cutter outlet hole for accommodating and guiding the cutter discharge of the cutter; a manual staple knife actuator operatively connected to the staple and the knife by a transmission assembly to advance the staple and the knife; the shell is detachably connected with a safety bolt which is matched with the transmission assembly to limit the movement of the transmission assembly so that the transmission assembly cannot push the anastomosis nail and the cutter. The anorectal anastomat is provided with a safety structure, so that the possibility of accidental nail and knife discharging in the operation process is reduced.

Description

Anorectal anastomat

Technical Field

The utility model relates to the field of medical equipment, especially, relate to an anorectal anastomat.

Background

Hemorrhoids (hemorrhoids) are the most common anal diseases. As shown in FIG. 1, the hemorrhoidal tissue 100 is generally elongate in shape at the patient's anorectal bowel 200, and has a length that extends generally along the length of the anorectal bowel, with the length of the hemorrhoidal tissue 100 typically being several times the width.

An anorectal stapler is a medical instrument for excising hemorrhoids that has a head that needs to extend into the anorectum of a patient in order to perform the relevant procedure on a surgical site when in use.

In order to achieve the above "correlation process", the head of the stapler is generally provided with: the hemorrhoid stapler comprises a clamping component used for clamping to fix hemorrhoid tissues, anastomotic nails used for stapling the clamped hemorrhoid tissues, and a cutter used for cutting the stapled hemorrhoid tissues. The anastomotic nails and the cutter are accommodated in a nail bin of the head, and when the anastomotic nails and the cutter are pushed to move by a manually operated braking element to discharge the nails and the cutter.

However, many conventional anorectal staplers are not configured with a safety feature to prevent unintended and unintended nail and knife exits, increasing surgical risk.

Disclosure of Invention

The utility model provides a technical problem be: an anorectal anastomat with a safety structure is provided to reduce the possibility of accidental nail and knife out in the operation process.

The technical scheme of the utility model is that:

an anorectal stapler comprising:

a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

the nail bin is provided with a nail outlet hole for receiving and guiding the nail to be discharged from the anastomotic nail and a cutter outlet hole for receiving and guiding the cutter to be discharged from the cutter;

a manual staple knife actuator operatively connected to the staples and the cutting knife by a transmission assembly to advance the staples and the cutting knife;

The shell is detachably connected with a safety bolt which is matched with the transmission assembly to limit the movement of the transmission assembly so that the transmission assembly cannot push the anastomosis nail and the cutter.

The utility model discloses on above-mentioned technical scheme's basis, can also include one or more in the following preferred scheme:

the transmission assembly is provided with a second jack, and the safety bolt is inserted into the first jack and the second jack in a withdrawable manner.

The transmission assembly includes a push rod operable to move in a first direction, and the second receptacle is disposed on the push rod.

The bore axes of the first and second receptacles are perpendicular to the first direction.

The second insertion hole is a long hole extending in the first direction, and the safety bolt limits the push rod to move within the length range of the long hole.

The push rod extends in the first direction.

The shell is connected with a sliding pin which is movably arranged in the long hole in a penetrating mode and used for guiding the push rod to move in the first direction.

The number of the sliding pins is two, and the sliding pins are arranged at intervals in the first direction.

The staple knife actuator is a push button that is movably connected to the housing in the first direction, and one end of the push rod is fixedly connected to the push button.

The shell is provided with a push button guide hole extending in the first direction, and the push button is connected with the push button guide hole in a sliding mode.

The utility model discloses following beneficial effect has at least:

the utility model discloses can extract ground connection and the cooperation of drive assembly, with restriction drive assembly motion, and then make drive assembly can not promote the insurance bolt of anastomotic nail and cutter on the casing of anus intestines anastomat. The assembly of the safety bolt is kept under the condition that nail and knife discharging is not needed; after the preparation is made, the safety bolt is drawn out. Effectively avoiding the possibility of accidental nail outlet and accidental cutter outlet.

Drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the drawings of the embodiments will be briefly described below, and it is obvious that the drawings in the following description only relate to some embodiments of the present invention, and are not intended to limit the present invention.

Fig. 1 is a schematic illustration of tissue.

Fig. 2 is a schematic view of the three-dimensional structure of the anorectal stapler in the embodiment of the present invention, wherein the clamping assembly is in the clamping state, and the staple and the cutter are respectively in the state of waiting for staple ejection and the state of waiting for cutter ejection.

Fig. 3 is a schematic cross-sectional view of the anorectal stapler of fig. 2.

Fig. 4 is an enlarged view of the X1 portion of fig. 3.

FIG. 5 is a schematic view of the anorectal stapler of FIG. 3 after the push button has been advanced to push out the staple and cutter.

Fig. 6 is an enlarged view of the X2 portion of fig. 5.

FIG. 7 is a schematic view of the first portion of the anorectal stapler of FIG. 2 after the push button has been retracted to an extreme position.

FIG. 8 is a schematic view of the second portion of the anorectal stapler of FIG. 2.

FIG. 9 is a schematic view of the first portion of the anorectal stapler of FIG. 2 with the clamping assembly in an undamped condition.

Fig. 10 is an enlarged view of the X3 portion of fig. 9.

FIG. 11 is a schematic view of the first portion of the anorectal stapler of FIG. 2 in a clamped state in the clamping assembly.

Fig. 12 is an enlarged view of the X4 portion of fig. 11.

Figure 13 is a top view of the staple knife push plate of figure 11 removed.

Fig. 14 is an enlarged view of the X5 portion of fig. 13.

Fig. 15 is an exploded view of the anorectal stapler of fig. 2.

Fig. 16 is a partially enlarged view of fig. 15.

Fig. 17 is a schematic structural view of a cutter according to an embodiment of the present invention.

FIG. 18 is an illustration of the use of a straight cutting blade to cut hemorrhoidal tissue.

FIG. 19 is a schematic view of the hemorrhoid tissue structure of FIG. 18 after the cutting is completed.

Fig. 20 is a diagram showing the use of the cutter of the embodiment of the present invention to cut thin hemorrhoidal tissues.

FIG. 21 is a schematic view of the hemorrhoid tissue structure after completion of the cutting action of FIG. 20.

Fig. 22 is a representation of the use of the cutter of the present invention to cut thick hemorrhoidal tissue.

FIG. 23 is a schematic view of the hemorrhoid tissue structure after completion of the cutting action of FIG. 22.

Description of reference numerals:

1000-first part, 2000-second part;

100-hemorrhoid tissue, 200-anus and intestine, 300-human body;

101-a connecting part of a hemorrhoid tissue cutting section and an uncut section, and 102-a cutting seam between the hemorrhoid tissue cutting section and the uncut section;

d 1-first direction, d 2-second direction, d 3-third direction, d 4-fourth direction;

1-anastomotic nail, 2-cutter, 3-fixed holder, 4-movable holder, 5-clamping actuator, 6-first shell, 7-nail knife push plate, 8-nail knife actuator, 9-second shell, 10-push block, 11-first connecting rod, 12-second connecting rod, 13-third connecting rod, 14-driving belt, 15-push rod, 16-sliding pin, 17-safety bolt, 18-extension rod, 19-rolling shaft and 20-rolling wheel;

4 a-nail outlet hole, 4 b-cutter outlet hole;

6 a-handle, 6 b-clamping groove and 6 c-push button guiding hole;

7 a-nail pushing part, 7 b-knife pushing part;

9 a-jack, 9 b-rib, 9 c-guide groove;

10 a-chute, 10 b-bevel;

1501-front rod, 1502-rear rod, 15 a-push rod guide hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solutions of the embodiments of the present invention. It is to be understood that the embodiments described are some, not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present invention and in the claims, the terms "first", "second", and the like, if any, are used solely to distinguish one element from another, without any sequential or technical meaning. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two. The said "plurality" of the utility model means that no less than two.

In the description of the present invention and in the claims, the terms "connected," "mounted," "fixed," and the like are used broadly unless otherwise indicated. For example, "connected" may be a separate connection or may be integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the foregoing terms in the present invention can be understood as a case-by-case basis to those skilled in the art.

In the description of the present invention and in the claims, if there is an orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc., based on the orientation or positional relationship shown in the drawings, it is only for the convenience of clearly and simply describing the present invention, and it is not intended to indicate or imply that the elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and that these directional terms are relative concepts, for the description and clarification relative, and may be changed accordingly depending on the orientation in which the components are placed in the drawings. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

In describing and claiming the present invention, the terms "based on" and "based on," if any, are used to describe one or more factors that affect the determination. The term does not exclude additional factors that influence the determination. That is, the determination may be based solely on these factors or at least partially on these factors. For example, the phrase "determining a based on B," in which case B is a factor that affects the determination of a, such phrases do not exclude that the determination of a may also be based on C.

In the description of the present specification and claims, the term "configured to" if present, may generally be interchangeable with "having" \823030, "capability" or "designed to" or "for" or "capable," depending on the context.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solutions of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention. It will be understood that some of the technical means of the various embodiments described herein may be replaced or combined with each other without conflict.

In the description of the present invention and in the claims, the terms "first", "second", and the like, if any, are used only for distinguishing the described objects, and do not have any sequential or technical meaning. Thus, an object defined as "first," "second," etc. may explicitly or implicitly include one or more of the object. Also, the use of the terms "a" or "an" and the like, do not denote a limitation of quantity, but rather denote the presence of at least one of the two, and "a plurality" denotes no less than two. The said "plurality" of the utility model means that no less than two.

In the description of the present invention and the claims, the terms "connected," "mounted," "fixed," and the like, if any, are used broadly and unless otherwise specified. For example, "connected" may be a separate connection or may be integrally connected; may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the foregoing terms in the present invention can be understood by those skilled in the art as appropriate.

In the description of the present invention and in the claims, if there are any terms such as "upper", "lower", "horizontal", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is merely for convenience of clearly and concisely describing the present invention, and it is not intended to indicate or imply that the elements so referred to must have a particular orientation, be constructed and operated in a particular orientation, and that these directional terms are relative terms, which are used for descriptive and clarifying purposes, and may be changed accordingly depending on the orientation in which the components in the drawings are placed. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements.

In describing and claiming the present invention, the terms "based on" and "based on," if any, are used to describe one or more factors that affect the determination. The term does not exclude additional factors that influence the determination. That is, the determination may be based solely on these factors or at least partially on these factors. For example, the phrase "determining a based on B," in which case B is a factor that affects the determination of a, such phrases do not exclude that the determination of a may also be based on C.

In the description of the present invention and in the claims, the term "configured to" if present, may generally be interchangeable with "having" \823030, "or" designed to "or" for "or" capable, "depending on the context.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Figures 2 and 3 show an anorectal stapler for excising haemorrhoidal tissue in the anorectum of a patient. Like some conventional anorectal staplers, this anorectal stapler also has a head which, in use, extends partially or fully into the anorectum of the patient. The head has a length dimension extending in the first direction d1, or the head projects forward from the stapler body along the first direction d 1. The head is provided with: in use, the clamping assembly clamps hemorrhoidal tissue in a second direction d2, moves staples 1 in a third direction d3 to staple the hemorrhoidal tissue, and moves a cutter 2 in a fourth direction d4 to excise the hemorrhoidal tissue. In use, the head of the stapler is inserted into the anorectal tract of the patient substantially along the first direction d1, and, in combination with external operations, the hemorrhoid tissue is subjected to the related treatments by means of the related elements provided on the head.

In the present embodiment, the second direction d2 is substantially perpendicular to the first direction d1.

It will be appreciated that when the head of the stapler is inserted into the affected part of the anorectum, the length of the affected part of the anorectum will be arranged along the length of the head of the stapler, i.e. the first direction d1. In most cases, a sheath for opening the anorectal section to be operated is placed in the anorectal section in advance, and the length of the sheath and the length of the anorectal section at the affected part are also oriented in the first direction d1. Then a second direction d2, which is substantially perpendicular to the first direction d1, is substantially perpendicular to the anorectal length. The utility model discloses the background art has already explained: the hemorrhoidal tissue 100 within the anorectum is generally an elongated structure extending along the length of the affected part anorectum, the length of the hemorrhoidal tissue 100 in the first direction d1 being several times its width in the second direction d 2.

When the stapler is used, after the insertion depth of the head of the stapler is in place, the angle of the head clamping assembly is adjusted to align the head clamping assembly with the hemorrhoidal tissue 100 to be excised in the anorectum, and then the hemorrhoidal tissue 100 is clamped in the width direction of the hemorrhoidal tissue 100, so that preparation is provided for the stapling and excision of the hemorrhoidal tissue. Thereafter, by operating, the staples 1 are moved in the third direction d3 to staple the clamped hemorrhoidal tissue 100, and the cutting knife 2 is moved in the fourth direction d4 to cut off the stapled hemorrhoidal tissue 100 located outside the staples.

Since the width dimension of the hemorrhoidal tissue 100 is smaller than the length dimension, when the clamping assembly clamps the hemorrhoidal tissue 100 in the width direction (second direction d 2) of the hemorrhoidal tissue, the patient's pain is less than in the conventional solution of clamping the hemorrhoidal tissue in the length direction (first direction d 1), and clamping a small width of the hemorrhoidal tissue 100 in the width direction is easier to handle.

As shown in fig. 4, 6, 10, 12 and fig. 3, 5, 7, 9 and 11, in the present embodiment, the clamping assembly includes a fixed clamping seat 3 and a movable clamping seat 4 which are matched with each other, and the movable clamping seat 4 and the fixed clamping seat 3 are arranged in the second direction d 2. The clamping action of the clamping assembly is driven by a manually operated clamping actuator 5. The clamping actuating piece 5 is connected with the movable clamping seat 4 through a first transmission component. In use, the operator manually actuates the clamping actuator 5, and the clamping actuator 5 drives the movable clamping base 4 to move towards the fixed clamping base 3 through the first transmission assembly, so as to clamp and fix the hemorrhoid tissue 100 to be excised between the movable clamping base 4 and the fixed clamping base 3 along the second direction d 2.

In order to facilitate the operation and the installation of the related components, the anorectal stapler of the embodiment is further provided with a first shell 6 with a handle 6 a. The gripping actuator 5 is embodied as a trigger having a first end, i.e. the upper end in fig. 3, extending into the first housing 6 and being pivotally connected to the first housing 6 and a second end, i.e. the lower end in fig. 3, extending outside the first housing 6 for manual operation. An extension rod 18 extending forward in the first direction d1 is fixedly connected to the first housing 6, and the movable holder 4 is integrally fixed to a front end portion of the extension rod 18.

Referring again to fig. 3, the first transmission assembly is mainly composed of a first link 11, a second link 12, a third link 13, and a transmission belt 14. Wherein: the first link 11 extends in the first direction d1, and the left end of the first link 11 in fig. 3 is fixed to the movable holder 4. The second link 12 has a first end, i.e., an upper end in fig. 3, pivotally connected to the first link 11, and a second end, i.e., a lower end in fig. 3, pivotally connected to the first housing 6. A first end, i.e. the upper end in fig. 3, of the third link 13 is pivotally connected to the first link 11, and a second end, i.e. the lower end in fig. 3, is pivotally connected to the first housing 6. A drive belt 14 connects a first end of the trigger and a second end of the third link 13. When the first end of the trigger is rotated, the second end of the third link 13 is driven to rotate by the transmission belt 14.

When the device is used, the trigger in fig. 9 is pulled, so that the first end of the trigger rotates anticlockwise around the switching part between the first end of the trigger and the first shell 6, the second end of the third connecting rod 13 is driven to rotate anticlockwise through the transmission belt 14, and the first connecting rod 11 is driven to move leftwards and move downwards. The movable clamping base 4 fixed at the left end of the first connecting rod 11 is pressed against the fixed clamping base 3 to clamp and fix the hemorrhoidal tissues between the movable clamping base 4 and the fixed clamping base 3, as shown in fig. 11.

To prevent the transmission belt 14 from slipping during operation, a gear body may be provided at each of the first end of the trigger and the second end of the third link 13, and correspondingly, the transmission belt 14 may be provided in a toothed belt structure engaged with the two gear bodies.

In order to enable the cartridge 4 to move back automatically in figure 11 after the user releases the trigger, the present embodiment is further provided with a return torsion spring, not shown, connected between the first end of the trigger and the first housing 6. The return torsion spring applies a clockwise elastic force to the first end of the trigger in fig. 3. Obviously, the aforementioned return torsion spring may be disposed at other positions, for example, between the second end of the second link 12 and the first housing 6, or between the second end of the third link 13 and the first housing 6.

Furthermore, a locking element can be arranged on the first transmission assembly, so that the movable clamp seat 4 and the fixed clamp seat 3 can be locked in a clamping state, and the grasping force of a user on the trigger is released. When the movable clamping seat 4 needs to return, the locking element is unlocked. The locking element may take various configurations known to those skilled in the art and will not be described in detail herein.

Referring to fig. 4, 6, 10, 12 and 14 again, the movable clamping seat 4 is provided with a plurality of nail holes 4a and a cutter hole 4b. Among them, the staple discharging holes 4a are used for receiving the staples 1 and guiding the staples 1 to move along the third direction d3, and the knife discharging holes 4b are used for receiving the staples 1 and guiding the knife 2 to move along the fourth direction d 4. It can be seen that the movable clamp holder 4 has substantially the same structure and function as a cartridge in a conventional stapler, and is used for clamping the hemorrhoidal tissue and guiding the stapling direction and the cutting direction of the staples 1 and the cutting knife 2, so that the movable clamp holder 4 can also be referred to as a cartridge. The fixed clamping seat 3 is similar to a nail propping seat in a traditional anastomat.

Those skilled in the art will appreciate that the nail hole 4a and the cutter hole 4b have various configurations to achieve the above-described functions. For example, the nail hole 4a is a hole penetrating through the movable holder 4 in the third direction d3, and the cutter hole 4b is a hole penetrating through the movable holder 4 in the fourth direction d 4; for another example, only a part of the hole segments of the nail outlet hole 4a is arranged to extend in the third direction d3, and only a part of the hole segments of the cutter outlet hole 4b is arranged to extend in the fourth direction d 4.

The hemorrhoidal tissue 100 is clamped and folded in the second direction d2, so that the dimensions of the hemorrhoidal tissue 100 in the clamped state in the second direction d2 are smaller. If the staples 1 staple the hemorrhoidal tissue in the clamping direction of the hemorrhoidal tissue 100, the stapling force exerted on the hemorrhoidal tissue during the stapling operation is small, which is not only easy to implement, but also the secondary deformation of the clamped hemorrhoidal tissue and the pain of the patient during the stapling process are small. Thus, the present embodiment sets the stapling direction of the staples 1, i.e., the third direction d3, substantially parallel to the second direction d2, i.e., the stapling direction of the staples 1 substantially coincides with the clamping movement direction of the clamping assembly.

In addition, in order to simplify the structural design of the stapler and improve the structural compactness of the stapler, the cutting movement direction of the cutter 2, i.e. the fourth direction d4, is also set to be substantially parallel to the second direction d2 in the embodiment. It can be seen that the second direction d2, the third direction d3 and the fourth direction d4 are substantially the same direction and are all substantially perpendicular to the protruding direction of the stapler head, the first direction d1.

In order to facilitate the surgical personnel to push out the staple outlet hole 4a and the knife outlet hole 4b of the staple 1 and the cutter 2 from the driven holder 4, the present embodiment is further provided with a staple knife push plate 7, a staple knife actuating member 8, and a second transmission assembly connecting the staple knife actuating member 8 and the staple knife push plate 7. Wherein:

referring to fig. 4 and 6 in combination with fig. 3 and 5, the staple pusher 7 is disposed on a side of the movable holder 4 facing away from the fixed holder 3 in the second direction d2, and the staple pusher 7 and the fixed holder 3 are respectively disposed on two opposite sides of the movable holder 4 in the second direction d 2. A manually operated staple knife actuator 8 is operatively connected to the staple knife push plate 7 by a second transmission assembly. In use, the staple knife actuating member 8 is manually actuated, and the staple knife actuating member 8 drives the staple knife pushing plate 7 to move towards the movable clamping seat 4 through the second transmission assembly, so that the staples 1 and the cutting knife 2 are respectively pushed out from the staple outlet hole 4a and the knife outlet hole 4 b. It can be seen that the movement of the staples 1 and the cutters 2 is driven by the same set of components.

In order to ensure the smooth implementation of the cutting operation, the hemorrhoid tissue needs to be stapled first, and then the stapled hemorrhoid tissue needs to be cut off. The staple discharging operation of the staple 1 precedes the knife discharging operation of the knife 2. Thus, the present embodiment makes such a design for the staple-cutter pusher plate 7:

Referring again to fig. 4, 6, 10 and 12, the staple pusher plate 7 includes a pusher portion 7b and a staple pushing portion 7a, wherein the staple pushing portion 7a is formed to protrude from the pusher portion 7b toward the movable holder 4. The staple pusher 7a is operable to extend into the staple aperture. As such, in the process of moving the staple pusher plate 7 toward the movable jaw 4, the staple pushing portion 7a contacts and pushes the staple 1 first, and then the knife pushing portion 7b contacts and pushes the cutter 2. The plurality of staple pushing portions 7a are provided to push the plurality of staples 1, respectively.

Preferably, the nail pushing part 7a always extends into the nail outlet hole 4a both when the nail is pushed and when the nail is not pushed, so as to reduce the possibility that the nail pushing part 7a cannot smoothly enter the nail outlet hole to push the nail due to the nail pushing operation, as shown in fig. 4 and 10.

In this embodiment, the knife actuator 8 is a push button that is movable in a first direction d 1. The second transmission assembly mainly comprises a push block 10 and a push rod 15. Wherein: the push block 10 is disposed on a side of the staple cutter push plate 7 facing away from the movable jaw 4 in the second direction d2, i.e., the push block 10 and the movable jaw 4 are disposed on opposite sides of the staple cutter push plate 7 in the second direction d2, respectively. As mentioned above, the third direction d3 and the fourth direction 4 are substantially parallel to the second direction d2, so the push block 10 and the movable holder 4 are also disposed on two opposite sides of the staple-cutter push plate 7 in the third direction d3 and the fourth direction d4, respectively. Moreover, the push block 10 is formed with a diagonal groove 10a arranged to intersect the first direction d1, that is, the extending direction of the diagonal groove 10a intersects the first direction d 1.

The push rod 15 extends in the first direction d1, has a rear end fixedly connected to a push button as the staple knife actuator 8, and has a front end pivotally connected to a roller 19 movably inserted into the inclined groove 10 a. When the push button is moved forward in the first direction d1, the roller 19 rolls along the inclined groove 10a and presses the push block 10 toward the staple pusher plate 7. The roller 19 and the chute 10a are in rolling fit instead of sliding fit, so that the friction force is small, and the push block 10 moves more smoothly.

As shown in fig. 4 and 6, in order to reduce the possibility that the roller 19 is stuck in the inclined groove 10a and hardly moved during use, the present embodiment further has a roller 20 having a diameter larger than that of the roller coaxially attached to the roller 19. Correspondingly, a bevel 10b is provided on the pusher 10, which cooperates in contact with the aforesaid roller 20 and is arranged parallel to the chute 10 a. When the push rod 15 is moved to the left in fig. 4, the roller 20 has come into contact with and pressed the inclined surface 10b downward while the roller 19 has not yet come into contact with or slightly comes into contact with the lower groove wall of the inclined groove 10a downward, so that the push block 10 is pushed downward mainly by the roller 20. That is, the downward movement of the pushing block 10 in fig. 4 is mainly achieved by the pressure of the roller 20 on the inclined surface 10b instead of the pressure of the roller 19 on the inclined groove 10 a. In this case, the mutually cooperating chute 10a and roller 19 are mainly used to define the connection between the push rod 15 and the push block 10, preventing the push block 10 from being detached from the push rod 15, while the roller 19 only plays the role of movably connecting the push rod and the push block, which can be replaced by a "connection shaft" without "rolling" function. In other embodiments, the inclined surface 10b may be provided only on the push block 10 without the inclined groove 10a, and correspondingly, the roller 20 engaged with the inclined surface 10b is provided at the front end of the push rod 15.

Two rollers 19 and two chutes 10a are provided. The second housing 9 is further provided with a guiding structure for limiting the push block 10 to move only along the second, third or fourth direction, for example, in fig. 8, the second housing 9 is integrally formed with a guiding groove 9c in contact fit with the push block 10, and the groove depth of the guiding groove 9c extends in the second direction.

The stapler is further provided with a second housing 9 connected to the first housing 6. The push rod 15 is movably connected with the second housing 9 in a manner that the push rod can move along the first direction d1, so that the moving direction of the push rod 15 is better defined. Specifically, the method comprises the following steps: the push rod 15 is formed with a long push rod guide hole 10a extending in the first direction d1, and the second housing 9 is connected with a slide pin 16 movably inserted in the push rod guide hole 15a.

Further, the sliding pins 16 are configured with two in total to better define the matching angle of the push rod 15 and the second housing 9.

To prevent the push button as the staple knife actuator 8 from moving to the left in fig. 2, which is not subjective, resulting in accidental staple ejection and accidental knife ejection, the present embodiment is provided with the following safety structure:

the second housing 9 is formed with an insertion hole 9a extending in a direction perpendicular to the first direction d 1. A safety pin 17 is removably inserted into the insertion hole 9a and the push rod guide hole 15a of the push rod 15. When in the aforementioned assembled condition, safety latch 17 defines the limit of forward travel of pusher 15, preventing staple 1 or knife 2 from being pushed out without the need for both ejection and knife ejection. When it is desired to staple and cut the hemorrhoidal tissue, the safety catch 17 is withdrawn.

If the staple knife push plate 7 is completely independently disposed at the side of the movable cartridge 4, the staple knife push plate 7 is easily dropped and lost from the movable cartridge 4 after the second part 2000 of the stapler is separated from the first part 1000. Therefore, the nail knife push plate 7 is movably connected with the movable clamping seat 4 in the embodiment.

It can be understood that, when the clamping assembly is in the unclamped state, the larger the distance between the movable clamp holder 4 and the fixed clamp holder 3 in the second direction d2 is, the more the hemorrhoid tissue 100 with the larger width can be clamped, thereby increasing the operation range of the anorectal stapler. However, the radial dimension of the anorectal is limited, so that the distance between the movable clamp holder 4 and the fixed clamp holder 3 cannot be increased without any limitation. As mentioned above, the push block 10 is disposed on a side of the staple-cutter push plate 7 facing away from the movable holder 4 in the second direction d2, so that the push block 10 occupies a space in the second direction d2 of the holding component, which is not favorable for increasing the distance between the movable holder 4 and the fixed holder 3. Therefore, the present embodiment provides the second housing 9 and the first housing 6 as two independent elements, which are detachably engaged to eliminate the occupation of the relevant space by the pushing block 10, and the following descriptions are specifically provided:

in operation, the second housing 9 with the push block 10 is detached from the first housing 6, and the operator holds only the "remaining part" of the stapler as shown in fig. 4 and inserts the distal end portion (left end portion in fig. 4) of the remaining part into the affected part of the anorectal of the patient. For the sake of convenience of description, the aforementioned "remaining part" will be referred to as the first part 1000 of the stapler, and the second housing 9 with the push block 10 will be referred to as the second part 2000 of the stapler. Before the above steps, a sheath for opening the anorectal section to be operated may be placed in the anorectal section in advance, and the sheath has a notch for allowing the hemorrhoid tissue to be cut to extend into the sheath from the notch, so as to facilitate the clamping, stapling and cutting of the hemorrhoid tissue while improving the operation safety. At this time, since the pushing block 10 occupying the space in the second direction d2 (i.e., the space in the radial direction of the anorectal region) does not exist in the distal end portion of the first portion, the distance between the movable holder 4 and the fixed holder 3 can be set to be large, and the hemorrhoidal tissue 100 having a larger width can be clamped and fixed. Then, the hemorrhoid tissue 100 to be cut is aligned to the distance between the movable clamp holder 4 and the fixed clamp holder 3, and the trigger is pulled to make the movable clamp holder 4 and the fixed clamp holder 3 clamp the hemorrhoid tissue 100 in the second direction d2, that is, the width direction of the hemorrhoid tissue. At this time, the movable holder 4 and the fixed holder 3 have been moved close to each other by a certain distance, so that the front end of the first part is reduced in size in the second direction d2, thereby leaving a sufficient fitting space for the second part. That is, the dimension of the clamping assembly in the second direction d2 in the clamped state at this time < the dimension of the clamping assembly in the second direction d2 in the non-clamped state previously. Thereafter, the second housing 9 is engaged with the first housing 6, and the second portion of the stapler is loaded such that the push block 10 is positioned at a side of the staple knife push plate 7 facing away from the movable jaw 4 in the second direction d2, ready for pushing the staple knife push plate 7.

It can be seen that the second part of the stapler is loaded after the front end of the first part has been extended into the patient's anorectum. In order to ensure that the pushing block 10 and other elements at the front end of the second part can smoothly extend into the anorectum in the process of assembling the second part into the first part, so as to ensure the smooth implementation of the operation. The second housing 9 and the first housing 6 adopt such separable connecting structure:

as shown in fig. 4 and 5 with reference to fig. 2 and 3, the first housing 6 is provided with a locking groove 6b extending in the first direction d1, and the second housing 9 is provided with a locking rib 9b extending in the first direction d 1. When assembled, the rib 9b of the second housing 9 is pushed forward in the first direction d1 into the notch 6b of the first housing 6, thereby engaging the second housing 9 with the first housing 6. When the card edge 9b is separated, a force is applied to withdraw the card edge from the card slot 6b in the first direction d 1.

If the push rod 15 and the push button as the staple knife actuator 8 are both attached to the second housing 9, they will be removed and inserted together with the second housing 9 during use, resulting in a larger number of parts and a larger size of the second part. This does not facilitate the use of the anorectal stapler and presents certain design difficulties. Therefore, the present embodiment will further optimize the structure of the anorectal stapler as follows:

The first housing 6 is formed with an elongated push button guide hole 6c extending in the first direction d1, and a push button as the driver 8 is slidably connected to the push button guide hole 6c. The push rod 15 is composed of a front rod 1501 and a rear rod 1502 which are detachably connected, and the front rod 1501 and the rear rod 1502 are arranged in the first direction d1 and both extend along the first direction d 1. The push rod guide hole 15a is specifically provided in the front rod 1501. Thus, the front lever 1501 is connected to the second housing 9 via the push lever guide hole 15a and the slide pin 16. The rear rod 1502 is secured to a push button as the staple knife actuator 8, thereby connecting the rear rod 1502 to the first housing 6.

It can be seen that the push button as the staple knife actuator 8 and the rear rod 1502 of the push rod 15 belong to the above-mentioned first part of the stapler. The front stem 1501 of the pusher 15 belongs to the above-mentioned second part of the stapler. When the second housing 9 is detached from the first housing 6, the front rod 1501 and the push block 10 are detached together with the second housing 9, and the rear rod 1502 and the push button remain on the first housing 6.

In order to protect the rear rod 1502 of the push rod 15 after the second portion is detached, the rear rod can be completely accommodated in the first housing 6. In this embodiment, the push button guiding hole 6c is lengthened backward, so that the rear rod 1502 can be completely locked inside the first housing 6 after the push button is moved backward to the extreme position.

To better accommodate the hemorrhoid cutting procedure, the depth of insertion of the stapler head into the body (including the depth of insertion of the first portion nose and the depth of insertion of the second portion nose) is generally not less than 35mm. Therefore, the length of the push button guide hole 6c in the first direction d1 should not be less than 35mm, preferably 50 to 100mm. It is intended to ensure: when the push button is moved to the right in fig. 2 to the limit position and the front rod 1501 of the second portion is connected to the rear rod 1502 of the first portion, the distance between the front end of the second portion and the front end of the first portion in the first direction d1 is not less than the depth of the first portion inserted into the body.

The anorectal stapler may be capable of being withdrawn from the body in its entirety when the first and second parts are in an assembled state. However, as can be seen from the above description, in this embodiment the second housing 9 can be removed from the first housing 6 in such a way that it is pushed backwards in the first direction d1 (to the right in fig. 3), so that the first and second parts of the anorectal stapler can be withdrawn from the patient one after the other, which expands the usage of the anorectal stapler.

In this embodiment, the push rod 15 and the extension rod 18 are both of a slender plate-like structure, and the cross sections of the push rod and the extension rod are rectangular.

As shown in fig. 16, in the present embodiment, the front rod 1501 and the rear rod 1502 are detachably connected in this way: the rear end of the front rod 1501 is formed with a tab 1501a, the front end of the rear rod 1502 is formed with a catch hole 1502a adapted to the tab 1501a, and the tab 1501a is detachably connected to the catch hole 1502 a.

The hemorrhoidal tissue 100 within the anorectum is generally curved in shape, and some hemorrhoidal tissues 100 have an excessive length. For such a hemorrhoid tissue 100 with a large length and/or a curved shape, one-time excision is not possible, and multiple excision segments are required. When the hemorrhoid tissue 100 is cut off in sections, if the cutter 2 with a straight structure is adopted, the pain and the bitterness of the patient are increased, and the operation difficulty is increased. This is mainly due to the difficulty of a straight cutter cutting each surgical section completely, and the large connecting area between the anterior segment tissue and the tissue body that is not completely cut, which can seriously interfere with the cutting of the next surgical section, as shown in fig. 18 and 19. Therefore, the structure of the cutter 2 is optimally designed in the embodiment as follows:

as shown in fig. 17 with reference to fig. 14 and 16, the cutter 2 is viewed in the aforementioned second direction d2, and is approximately L-shaped. Specifically, the cutter 2 includes: a first blade segment 2a extending substantially along the first direction d1, and a second blade segment 2b bent and protruding from a front end of the first blade segment. The term "bent" as used herein in "bent out" may be interpreted as "angled".

As shown in fig. 20 and 21, the cutter 2 having a specific angle section in the L-shaped structure has a cutting edge, i.e., the second cutter section 2b, in the thickness direction of the hemorrhoidal tissue 100, so that it can completely cut off each surgical section of the hemorrhoidal tissue 100, thereby not only reducing the pain of the patient, but also facilitating the operation. If the thickness of the hemorrhoidal tissue 100 is larger, although the L-shaped cutter 2 cannot completely cut off a small section of tissue, the connection area between the tissue which is not separated after cutting and the tissue body is small, so that the previous section of tissue can be easily pulled away, and the next section of tissue can be conveniently cut, as shown in fig. 22 and 23.

In order to maximize the cutting thickness of the second blade section 2b in relation to the hemorrhoid tissue 100, in the case of a limited length dimension of the second blade section 2b, the direction of extension of the second blade section 2b (i.e., the direction in which the first blade section is bent "out") is not only substantially perpendicular to the first direction d1, but also substantially perpendicular to the fourth direction d4.

The present embodiment provides the cutting blade 2 as a sheet-like structure substantially parallel to the fourth direction d2, so that the cutting blade 2 can be better guided to move along the fourth direction d4 when in use.

In order to facilitate the processing and manufacturing of the cutting knife 2, more importantly, in order to reduce the risk of cutting by mistake during the operation, the first cutting section 2a and the second cutting section 2b are in arc transition connection in the embodiment.

It will be understood that, in the case of a sufficiently large radial space of the anorectum in which the hemorrhoidal tissue is to be cut, the greater the dimension of the second segment 2b of the cutting blade 2 in the direction of extension, the easier it is for a single cutting action to completely cut off the hemorrhoidal tissue. However, the radial space of the anorectal is limited and the dimension of the second blade section 2b in the protruding direction is therefore limited. The space of the anorectal in the length direction is larger than the radial space, so that the first section 2a of the cutter 2 can be arranged to be relatively long, and the hemorrhoid tissue which is as long as possible can be cut off in a single time on the premise of ensuring the operation quality. Therefore, the present embodiment sets the dimension of the second blade section 2b in the projecting direction thereof to be smaller than the dimension of the first blade section 2a in the first direction d 1.

It will be appreciated that the anorectal stapler is able to handle large widths of hemorrhoid tissue 100 as long as the first and second portions of the anorectal stapler are able to move relatively in the first direction d1 and have a sufficiently large movement stroke, and there is no requirement that the first and second portions must be able to separate from each other.

In the present embodiment, the length, width and thickness of the hemorrhoidal tissue 100 can be respectively interpreted as the dimension of the hemorrhoidal tissue in the length direction of the anorectal intestine, the dimension of the hemorrhoidal tissue in the circumferential direction of the anorectal intestine, and the dimension of the hemorrhoidal tissue in the radial direction of the anorectal intestine.

It should be noted that the cutting blade 2 is configured to cut the hemorrhoidal tissue 100 in a third direction d3 substantially perpendicular to the first direction d1, but it is not necessarily required that the clamping member is configured to be in the second direction d2 substantially perpendicular to the first direction d 1. If the tissue to be excised, which is already prepared (for example, clamped and stapled), has a certain size in the first direction d1, then the above-mentioned advantageous effects can be obtained when the above-mentioned L-shaped incision blade 2 is used to perform excision.

It should be noted that, as can be understood by those skilled in the art, for the anorectal region with a very limited space for the surgical operation, the pushing block 10 for pushing the nail-knife pushing plate, which occupies a space, is configured to be a rear-loading structure, so that after the stapler body clamps and fixes the tissue to be resected so as to vacate a corresponding space, the vacated space is utilized to load the pushing block 10 to push the nail-knife pushing plate, and the anorectal region stapler with the other structure may also be applied. The application of this solution does not presuppose that the second direction d2 and the first direction d1 are substantially perpendicular. The aforementioned solution can be applied as long as the clamping direction crosses the extension direction of the stapler head, in order to treat haemorrhoidal tissue having a larger dimension in the clamping direction.

Claims (10)

1. An anorectal stapler comprising:

a shell body, a plurality of first connecting rods and a plurality of second connecting rods,

the nail bin is provided with a nail outlet hole for receiving and guiding the nail to be discharged from the anastomotic nail and a cutter outlet hole for receiving and guiding the cutter to be discharged from the cutter;

a manual staple knife actuator operatively connected to the staples and the cutting knife by a transmission assembly to advance the staples and the cutting knife;

the surgical stapler is characterized in that a safety bolt which is matched with the transmission assembly to limit the movement of the transmission assembly and further prevent the transmission assembly from pushing the anastomosis nail and the cutter is detachably connected to the shell.

2. The anorectal stapler of claim 1 wherein the housing is formed with a first receptacle and the transmission assembly is formed with a second receptacle, and the safety latch is removably inserted into the first receptacle and the second receptacle.

3. The anorectal stapler of claim 2 wherein the transmission assembly includes a push rod operable to move in a first direction, the second insertion hole being provided on the push rod.

4. The anorectal stapler of claim 3 wherein a bore axis of said first and second receptacles is perpendicular to said first direction.

5. The anorectal stapler of claim 3 or 4 wherein the second receptacle is an elongated hole extending in the first direction, the safety latch limiting movement of the push rod within a length of the elongated hole.

6. The anorectal stapler of claim 5 wherein the push rod extends in the first direction.

7. The anorectal stapler of claim 5 wherein the housing is coupled with a sliding pin movably disposed through the elongated hole to guide the push rod to move in the first direction.

8. The anorectal stapler of claim 7 wherein two of said sliding pins are provided and are spaced apart in said first direction.

9. The anorectal stapler of claim 3 wherein said staple knife actuator is a push button movably connected to said housing in said first direction, said push rod having one end fixedly connected to said push button.

10. The anorectal stapler of claim 9 wherein the housing is formed with a push button guide hole extending in the first direction, the push button being slidably connected to the push button guide hole.

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