CN211049481U - Nail anvil and medical anastomat comprising same - Google Patents

Abstract

The utility model provides a nail anvil reaches medical anastomat including it for medical anastomat, the distal end side of nail anvil is provided with the guiding groove, the guiding groove includes the rake that its near-end side and cutter groove communicate mutually, the rake sets up from its distal end side downward sloping of its near-end side, the distal end side of push away the cutter arbor is followed cutter groove motion extremely during the distal end side of nail anvil, get into the rake and follow the rake motion. Through adopting the utility model discloses, after the anastomat percussion is accomplished, the distal end side of push-type broach pole continues to move to the distal end side under the guide of guiding groove to through the cooperation with the rake with nail anvil jack-up certain distance, autosegregation nail anvil and nail storehouse subassembly release the tissue between nail anvil and the nail storehouse subassembly, then can smoothly with push-type broach pole pull back to initial position.

Description

Nail anvil and medical anastomat comprising same

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to nail anvil reaches medical anastomat including it.

Background

Digestive tract diseases are one of the high-incidence diseases of human beings, and in the treatment process, a medical anastomat is often used for performing anastomosis on physiological tissues such as the digestive tract and the like instead of manual operation of a doctor. The medical anastomat is a common surgical operation instrument, an axial internal stapling mode is mostly adopted, physiological tissues such as esophagus, stomach and intestinal tract are anastomosed end to end or end to side in an operation, two sections of tissues are contained in the medical anastomat in an inwards converging mode in an anastomosing process, a circular anastomotic stoma is formed on the tissues after the completion of the anastomosis, and a human body channel is rebuilt.

In the prior art, the medical stapler comprises a medical stapler body, an operating handle movably connected with the medical stapler body, and a staple head part matched with the medical stapler body, wherein the staple head part comprises a staple cartridge and a staple anvil, and a cutter groove matched with a push-type cutter rod in the stapler is formed in the staple anvil surface of the staple anvil. When a doctor holds the operating handle to trigger the anastomat, the push knife rod moves from the proximal end side to the distal end side of the anastomat, and the cutter moves axially along the cutter groove to cut tissues. After the percussion is finished, the push rod needs to be pulled back, so that the push rod returns to the initial position along the cutter groove again. In the process of pulling back the cutter, the cutter can not smoothly return to the initial position due to the resistance of the tissue between the nail bin and the nail anvil.

The utility model discloses in, distal end side and near-end side are for the operator, and the one end that is nearer apart from the operator is near-end side, and the one end far away apart from the operator, the one end that is more close to the operation position promptly is the distal end side.

SUMMERY OF THE UTILITY MODEL

To the problem among the prior art, the utility model aims to provide a nail anvil reaches medical anastomat including it, after the anastomat percussion is accomplished, the distal end side of push-type broach pole will nail anvil jack-up certain distance, release the tissue between nail anvil and the nail storehouse, then smoothly with push-type broach pole pull back to initial position.

The embodiment of the utility model provides a nail anvil, which is used for a medical anastomat, the medical anastomat comprises a push rod, the nail anvil is provided with a cutter groove extending along the axial direction of the anastomat, the far end side of the push rod can move from the near end side of the nail anvil to the far end side of the nail anvil along the cutter groove;

the distal end side of the nail anvil is further provided with a guide groove, the guide groove comprises an inclined part, the proximal end side of the inclined part is communicated with the cutter groove, the inclined part is arranged in a mode that the inclined part inclines downwards from the proximal end side to the distal end side of the inclined part, and when the distal end side of the push cutter rod moves to the distal end side of the nail anvil along the cutter groove, the distal end side of the push cutter rod enters the inclined part and moves along the inclined part.

Optionally, a projection is provided on an upper portion of a distal end side of the pusher bar, and when the pusher bar moves along the cutter slot to the distal end side of the anvil, the projection enters the inclined portion and moves along the inclined portion.

Optionally, the width of the opening of the guide groove on the anvil surface of the anvil is greater than the width of the projection, so that the projection can be separated from the anvil through the opening of the guide groove on the anvil surface.

Optionally, the distal side of the inclined portion is an inclined portion first inclined surface inclined downward from the proximal side edge thereof to the distal side edge thereof, and the distal side of the bump includes a bump first inclined surface cooperating with the inclined portion first inclined surface.

Optionally, the proximal side of the inclined portion is an inclined portion second inclined surface inclined downward from the proximal side edge thereof to the distal side edge thereof, and the proximal side of the bump includes a bump second inclined surface that mates with the inclined portion second inclined surface.

Optionally, the guide groove further includes a communicating portion communicated with a distal end side of the inclined portion, and the communicating portion is vertically arranged relative to the anvil surface of the anvil.

Optionally, the side surface of the far end of the communicating part is a communicating part vertical surface vertically arranged relative to the nail anvil surface of the nail anvil, and the far end side of the projection includes a projection vertical surface matched with the communicating part vertical surface.

Optionally, the width of the opening of the cutter slot on the anvil face of the anvil is smaller than the width of the projection.

Optionally, the push-type broach rod comprises a connecting rod part, the protrusion is located on the far end side of the connecting rod part, a cutter is arranged below the protrusion, and the opening width of the cutter groove on the nail anvil surface of the nail anvil is larger than the width of the connecting rod part.

The embodiment of the utility model also provides a medical anastomat, which comprises the nail anvil.

The utility model provides a nail anvil reaches medical anastomat including it has following advantage:

the utility model provides a nail anvil for medical anastomat, after the anastomat percussion is accomplished, the distal end side of push-type broach pole enters into the guiding groove of nail anvil distal end side, the guide along with the rake of guiding groove continues to the motion of nail anvil distal end side, and with nail anvil jack-up certain distance in the motion process, autosegregation nail anvil and nail storehouse subassembly, release the tissue between nail anvil and the nail storehouse subassembly, pull-back push-type broach pole this moment, can not receive the resistance of organizing between nail storehouse and the nail anvil subassembly again, thereby can smoothly pull-back push-type broach pole to initial position, more make things convenient for doctor's operation.

Drawings

Other features, objects and advantages of the invention will become more apparent from a reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a partial schematic view of an stapler according to an embodiment of the invention;

FIG. 2 is a schematic view of the structure of the anvil and the push-knife lever, wherein the projection of the push-knife lever is located at the proximal end side of the anvil;

FIG. 3 is a left side view of FIG. 2;

FIG. 4 is a sectional view taken in the direction A1-A1 of FIG. 3;

FIG. 5 is an enlarged view at B1 in FIG. 4;

FIG. 6 is a schematic view of the configuration of the anvil in cooperation with the push-knife lever, wherein the projection of the push-knife lever is located at the distal end side of the anvil;

FIG. 7 is a sectional view taken in the direction A2-A2 of FIG. 6;

FIG. 8 is a sectional view taken in the direction A3-A3 of FIG. 6;

FIG. 9 is a cross-sectional view of the stapler of FIG. 6 taken along an axial direction of the stapler;

FIG. 10 is an enlarged view at B2 in FIG. 9;

FIG. 11 is a schematic view of the push rod of FIG. 10 with the protrusion moved to the distal end;

fig. 12 is a schematic structural view of a pusher bar according to an embodiment of the present invention;

FIG. 13 is a schematic view of an anvil according to an embodiment of the present invention;

FIG. 14 is an enlarged view at B3 in FIG. 13;

fig. 15 is a schematic plan view at B3 in fig. 13.

Reference numerals:

1 staple cartridge assembly 412 inclined portion second inclined surface

11 proximal side 42 communication part of cartridge assembly

12 vertical surface of communicating part of far end side 421 of nail bin assembly

2 nail anvil 5 push-type knife bar

21 anvil's proximal side 51 lug

22 anvil distal side 511 projection first ramp

23 anvil surface 512 lug second inclined plane

3 vertical surface of the projection of the cutter groove 513

4 guide groove 52 cutter

41 inclined part 53 link part

411 inclined part first inclined surface 6 anastomat body

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

In order to solve the technical problems in the prior art, the utility model provides a nail anvil for a medical anastomat and the medical anastomat comprising the nail anvil. The medical anastomat comprises an anastomat body and a nail head arranged on the far-end side of the anastomat body, the nail head comprises a nail bin assembly and a nail anvil, a cutter groove matched with a cutter pushing rod inside the anastomat is formed in the nail anvil surface of the nail anvil, and a cutter is arranged on the far-end side of the cutter pushing rod. During stapler firing, the distal side of the pusher bar may be moved along the knife slot from the proximal side of the anvil to the distal side of the anvil to cut tissue located between the cartridge assembly and the anvil.

The distal end side of the nail anvil is also provided with a guide groove, the guide groove comprises an inclined part, the proximal end side of the inclined part is communicated with the cutter groove, and the inclined part is inclined downwards from the proximal end side to the distal end side of the inclined part. When firing is completed, the distal end side of the pusher bar moves along the knife slot to the distal end side of the anvil and enters the inclined portion to move along the inclined portion. When the push knife rod moves along the inclined part, because the inclined part is obliquely arranged, the side face of the far end of the push knife rod is abutted against the side face of the far end of the inclined part, and along with the continuous movement of the push knife rod to the side face of the far end, the push knife rod provides an upward thrust force for the nail anvil, and the nail anvil is jacked upwards for a certain distance relative to the nail bin assembly, so that the nail anvil and the nail bin assembly are automatically separated, and the tissue between the nail anvil and the nail bin is released.

The structure of the stapler and the nail anvil of the present invention will be described in detail with reference to fig. 1 to 15.

As shown in fig. 1 and fig. 2, in this embodiment, the medical stapler includes a stapler body 6, and a staple cartridge assembly 1 and an anvil 2 which are disposed at a distal end side of the stapler body 6, a knife pushing bar 5 is further disposed inside the stapler, and in fig. 2, in an initial state, a distal end side of the knife pushing bar 5 is located at a proximal end side 21 of the anvil 2.

In the present invention, the distal side and the proximal side are relative to the operator, wherein the distal side refers to the end farther from the operator and the proximal side refers to the end closer to the operator. For example, in the views of FIGS. 1 and 2, the distal side 12 of the cartridge assembly 1 is the end on the left in the figures, the proximal side 11 of the cartridge assembly 1 is the end on the right in the figures, the distal side 22 of the anvil 2 is the end on the left in the figures, and the proximal side 21 of the anvil 2 is the end on the right in the figures. In addition, in the present invention, the upper and upward directions refer to the nail anvil 2 relative to the nail cartridge assembly 1, which defines that the nail anvil 2 is located above the nail cartridge assembly 1, the nail anvil 2 is far away from the nail cartridge assembly 1 when moving upward, the nail anvil 2 is close to the nail cartridge assembly 1 when moving downward, and in the viewing angles of fig. 1 and 2, the upward direction refers to the upper end in the drawing.

As shown in fig. 3 to 5, the anvil 2 is provided with a cutter slot 3 extending in the axial direction of the stapler, and the distal end side of the cutter bar 5 can move along the cutter slot 3 from the proximal end side 21 of the anvil 2 to the distal end side 22 of the anvil 2. The distal end side 22 of the anvil 2 is further provided with a guide groove 4, the guide groove 4 comprising a slope 41, a proximal end side of the slope 41 communicating with the knife channel 3, the slope 41 being provided obliquely downward from its proximal end side to its distal end side, i.e., the slope 41 extends obliquely downward from a right end to a left end in the perspective of fig. 4 and 5. In this embodiment, the upper part of the distal side of the pusher bar 5 is provided with a cam 51, and upon firing of the stapler, the cam 51 of the pusher bar 5 moves in the knife slot 4 from the proximal side 21 of the anvil 2 to the distal side 22 of the anvil 2.

As shown in fig. 6 to 10, when the stapler is completely fired, the projection 51 of the pusher bar 5 moves along the cutter slot 3 to the distal end side of the anvil 2, and enters the inclined portion 41 communicating with the cutter slot 3. When the projection 51 continues to move in the direction of the distal end side of the stapler, the anvil 2 can be automatically lifted up by a distance substantially equal to the height of the inclined portion 41 in the up-down direction by the engagement of the projection 51 with the inclined portion 41. Wherein fig. 9 is a cross-sectional view in fig. 6 in the axial direction of the stapler, i.e. fig. 9 is the same as the cross-sectional view of fig. 4, in which fig. 4 the projection 51 of the pusher bar 5 is located at the proximal side 21 of the anvil 2 and in fig. 9 the projection 51 of the pusher bar 5 is located at the distal side 22 of the anvil 2.

As shown in fig. 9 and 10, in this embodiment, the distal side surface of the inclined portion 41 is an inclined portion first inclined surface 411 inclined downward from the proximal side edge thereof to the distal side edge thereof, and the distal side of the projection 51 includes a projection first inclined surface 511 that cooperates with the inclined portion first inclined surface 411. After the projection 51 enters the inclined portion 41, the movement is continued in the distal end side direction of the stapler along the inclined portion 41. As shown in fig. 11, during the movement, the first ramp 511 of the tab interferes with the first ramp 411 of the incline, and the first ramp 511 of the tab imparts a force F to the first ramp 411 of the incline perpendicular to the first ramp 411 of the incline, the force F having an upward component by which the anvil 2 is lifted a distance upward, i.e., the anvil 2 is moved a distance in the direction C of fig. 11.

Further, the proximal side surface of the inclined portion 41 is an inclined portion second inclined surface 412 inclined downward from the proximal side edge thereof to the distal side edge thereof, and the proximal side of the bump 51 includes a bump second inclined surface 512 cooperating with the inclined portion second inclined surface 412. By the cooperation of the second ramp 412 and the second ramp 512, the anvil 2 is better guided to move upward relative to the tab 51 as the tab 51 moves in the ramp 41.

In this embodiment, as shown in fig. 7 to 9, the pusher bar 5 includes a link portion 53, the projection 51 is located on the distal end side of the link portion 53, a cutter blade 52 is provided below the projection 51, and the opening width d2 of the cutter slot 3 on the anvil surface 23 of the anvil 2 is larger than the width of the link portion 53, so that the link portion 53 can move in the axial direction of the stapler in the cutter slot 3. When the stapler is fired, the link portion 53 drives the cutter 52 to move from the proximal side to the distal side of the stapler to cut tissue, and drives the protrusion 51 to move from the proximal side to the distal side of the stapler.

Further, as shown in fig. 7 and 12-15, in order to ensure that the knife pushing bar 5 does not disengage from the anvil 2 during the firing process, the opening width d2 of the knife cutting groove 3 on the anvil surface 23 of the anvil 2 is smaller than the width d1 of the projection 51.

Further, as shown in FIGS. 8 and 12-15, in this embodiment, the opening width d3 of the guide slot 4 on the anvil surface 23 of the anvil 2 is greater than the width d1 of the projection 51. When the cam 51 moves along the inclined portion 41 and to the bottom end of the guide groove 4 after the stapler is fired, the cam 51 can be separated from the anvil 2 through the opening of the guide groove 4 on the anvil surface 23. Through the arrangement, after the anastomat is fired, the nail anvil 2 and the nail bin assembly 1 can be separated, so that the jaw of the anastomat is opened by a larger angle, and the push rod 5 is more conveniently pulled back to the initial position.

In order to better guide the separation of the anvil 2 from the cartridge module 1 after the stapling of the stapler is completed, as shown in fig. 10 and 11, in this embodiment, the guide slot 4 further comprises a communicating portion 42 communicating with the distal end side of the inclined portion 41, and the communicating portion 42 is vertically arranged relative to the anvil surface 23 of the anvil 2. The vertical arrangement here is in the up-down direction in the perspective of fig. 10 and 11.

In this embodiment, the distal side surface of the communicating portion 42 is a communicating portion vertical surface 421 vertically arranged relative to the anvil surface 23 of the anvil 2, and the distal side of the projection 51 includes a projection vertical surface 513 matched with the communicating portion vertical surface 421. After the stapler is completely fired, the projection 51 of the knife bar 5 enters the inclined portion 41, moves along the inclined portion 41 and pushes up the anvil 2 for a certain distance, and then the projection 51 enters the communicating portion 42. If the anvil 2 and cartridge assembly 1 are then further separated, the projection 51 continues to move along the communication portion 42 and downward relative to the anvil 2, and finally disengages from the communication portion 42 in the opening of the anvil surface 23 with respect to the anvil 2. The cooperation of the communication portion vertical surface 421 and the projection vertical surface 513 can better guide the separation process of the anvil 2 from the projection 51.

To sum up, compared with the prior art, through adopting the utility model discloses a nail anvil structure for medical anastomat, after the anastomat percussion is accomplished, the distal end side of push-type broach pole enters into the guiding groove of nail anvil distal end side, the guide along with the rake of guiding groove continues to nail anvil distal end side motion, and with nail anvil jack-up certain distance in the motion process, autosegregation nail anvil and nail storehouse subassembly, release the tissue between nail anvil and the nail storehouse subassembly, pull-back push-type broach pole this moment, can not receive the resistance of tissue between nail storehouse and the nail anvil subassembly again, thereby can smoothly pull-back push-type broach pole to initial position, more make things convenient for doctor's operation.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The nail anvil is characterized by being used for a medical anastomat, the medical anastomat comprises a nail pushing rod, the nail anvil is provided with a cutter groove extending along the axial direction of the anastomat, and the far end side of the nail pushing rod can move from the near end side of the nail anvil to the far end side of the nail anvil along the cutter groove;

the distal end side of the nail anvil is further provided with a guide groove, the guide groove comprises an inclined part, the proximal end side of the inclined part is communicated with the cutter groove, the inclined part is arranged in a mode that the inclined part inclines downwards from the proximal end side to the distal end side of the inclined part, and when the distal end side of the push cutter rod moves to the distal end side of the nail anvil along the cutter groove, the distal end side of the push cutter rod enters the inclined part and moves along the inclined part.

2. The anvil of claim 1 wherein an upper portion of the distal side of the pusher bar is provided with a tab that enters the ramp and moves along the ramp as the pusher bar moves along the knife channel to the distal side of the anvil.

3. The anvil of claim 2 wherein the guide slot has an opening on the anvil face of the anvil that is wider than the tab such that the tab is separable from the anvil by the opening of the guide slot on the anvil face.

4. The anvil of claim 2 wherein the distal side of the ramp is a ramp first ramp sloping downwardly from its proximal side edge to its distal side edge, and the distal side of the tab includes a tab first ramp cooperating with the ramp first ramp.

5. The anvil of claim 2 wherein the proximal side of the ramp is a ramp second ramp sloping downwardly from its proximal side edge to its distal side edge, and the proximal side of the tab includes a tab second ramp cooperating with the ramp second ramp.

6. The anvil of claim 2 wherein said guide slot further comprises a communicating portion in communication with a distal side of said angled portion, said communicating portion being vertically disposed relative to an anvil face of said anvil.

7. The anvil of claim 6 wherein the distal side of the communicating portion is a communicating portion vertical surface disposed vertically with respect to the anvil surface of the anvil, the distal side of the tab including a tab vertical surface cooperating with the communicating portion vertical surface.

8. The anvil of claim 2 wherein said knife channel has an opening on the anvil face of said anvil that is less than the width of said tab.

9. The anvil of claim 8 wherein said pusher bar comprises a link portion, said protrusion being located on a distal side of said link portion, a cutter being disposed below said protrusion, said cutter channel having an opening in the anvil face of the anvil that is wider than the width of said link portion.

10. A medical stapler, characterized in that it comprises an anvil according to any one of claims 1 to 9.

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