US-12616470-B2 - Surgical stapler

US12616470B2US 12616470 B2US12616470 B2US 12616470B2US-12616470-B2

Abstract

A surgical stapler, the end effector includes a fastener-cartridge assembly and an anvil; the closing mechanism drives the end effector to be closed; the surgical fastener pushing assembly pushes the surgical fastener out of the fastener-cartridge assembly; in a closing stage, the first driver mechanism is in detachable connection with the closing mechanism to drive the closing mechanism to close the end effector; in a surgical fastener pushing stage after the closing stage, the first driver mechanism is separated from the closing mechanism and drives the surgical fastener pushing assembly to push the surgical fastener out of the fastener-cartridge assembly to suture the target tissue; the articulation mechanism and the rear articulation driver assembly drive the end effector to pivot; the detachable portion is in detachable connection with the main body portion to enable the front articulation driver assembly to be in detachable connection with the rear articulation driver assembly.

Inventors

Yunfeng Du

Assignees

INTOCARE MEDICAL TECHNOLOGY (SUZHOU) CO., LTD.

Dates

Publication Date: 20260505
Application Date: 20201130

Claims (19)

1 . A surgical stapler, comprising: an end effector, comprising a fastener-cartridge assembly and an anvil, wherein at least one surgical fastener is provided in the fastener-cartridge assembly; a closing mechanism, configured to drive the fastener-cartridge assembly and the anvil to engage with each other to close the end effector so that a target tissue is clamped between the fastener-cartridge assembly and the anvil; a surgical fastener pushing assembly, configured to push the surgical fastener out of the fastener-cartridge assembly; a first driver mechanism, wherein the first driver mechanism is configured that in a closing stage, the first driver mechanism is in detachable connection with the closing mechanism to drive the closing mechanism to close the end effector; and the first driver mechanism is configured that in a surgical fastener pushing stage after the closing stage, the first driver mechanism is separated from the closing mechanism and drives the surgical fastener pushing assembly to push the surgical fastener out of the fastener-cartridge assembly to suture the target tissue; and an articulation mechanism, comprising a front articulation driver assembly and a rear articulation driver assembly, wherein the front articulation driver assembly and the rear articulation driver assembly are configured to drive the end effector to pivot; the surgical stapler comprises a main body portion and a detachable portion, the detachable portion is in detachable connection with the main body portion; the end effector and the front articulation driver assembly are comprised in the detachable portion, the first driver mechanism and the rear articulation driver assembly are comprised in the main body portion; the detachable portion is in detachable connection with the main body portion to enable the front articulation driver assembly to be in detachable connection with the rear articulation driver assembly; the front articulation driver assembly comprises a front articulation driver member, and the front articulation driver member is connected with the end effector; the rear articulation driver assembly comprises a rear articulation driver member, the rear articulation driver member and the first driver mechanism have a same extension direction and are arranged side by side, and the detachable portion is in detachable connection with the main body portion to enable the front articulation driver member to be in detachable connection with the rear articulation driver member; the extension direction of the rear articulation driver member and the first driver mechanism is an axial direction; in a process where the articulation mechanism drives the end effector to pivot, the front articulation driver member and the rear articulation driver member move toward the end effector along the axial direction to drive the end effector to pivot toward a first pivoting direction, and/or, the front articulation driver member and the rear articulation driver member move along the axial direction away from the end effector to drive the end effector to pivot toward a second pivoting direction opposite to the first pivoting direction.
2 . The surgical stapler according to claim 1 , further comprising: a second driver mechanism, extending along the axial direction and comprised in the detachable portion, wherein the detachable portion is connected with the main body portion to enable the second driver mechanism to be in detachable connection with the first driver mechanism, the second driver mechanism is configured to be in detachable connection with the closing mechanism in the closing stage, and move toward the end effector as driven by the first driver mechanism, to enable the closing mechanism to close the end effector; the end effector comprises a first end close to the front articulation driver assembly and a second end opposite to the first end of the end effector, the second driver mechanism is further configured to be separated from the closing mechanism in the surgical fastener pushing stage after the closing stage, and continue to move toward the second end of the end effector as driven by the first driver mechanism, to drive the surgical fastener pushing assembly to push the surgical fastener out of the fastener-cartridge assembly; the front articulation driver assembly comprises a bendable portion, the bendable portion is configured to bend toward the first pivoting direction or the second pivoting direction to enable the end effector to pivot around the bendable portion; the first end of the end effector is connected with the front articulation driver assembly, and in the axial direction, the bendable portion is between a position where the front articulation driver assembly is connected with the first end of the end effector and a position where the front articulation driver assembly is connected with the rear articulation driver assembly; the second driver mechanism comprises a transmission belt extending along the axial direction; in the surgical fastener pushing stage, the transmission belt enters the end effector via the bendable portion to drive the surgical fastener pushing assembly to push the surgical fastener out of the fastener-cartridge assembly, and a belt surface of the transmission belt is substantially perpendicular to the first pivoting direction and the second pivoting direction.
3 . The surgical stapler according to claim 2 , wherein the second driver mechanism further comprises: a connection portion which is in detachable connection with the closing mechanism and on a side of the transmission belt away from the end effector, wherein an end of the connection portion close to the end effector is connected with an end of the transmission belt away from the end effector, and the detachable portion is connected with the main body portion so that an end of the connection portion away from the end effector is connected with the first driver mechanism.
4 . The surgical stapler according to claim 2 , wherein the second driver mechanism comprises a plurality of the transmission belts, the plurality of transmission belts are stacked in a direction perpendicular to the belt surface; and no gap is between adjacent transmission belts of the plurality of transmission belts.
5 . The surgical stapler according to claim 4 , wherein a material of the transmission belt is steel; a thickness of each of the plurality of transmission belts in the direction perpendicular to the belt surface ranges from 100 μm to 1000 μm, and a length of each of the plurality of transmission belts in the axial direction ranges from 10 cm to 30 cm.
6 . The surgical stapler according to claim 2 , wherein the surgical fastener pushing assembly comprises: a surgical fastener pushing piece, configured to apply pressure to the surgical fastener to push the surgical fastener out of the fastener-cartridge assembly; a surgical fastener pushing slide block, configured to apply pressure to the surgical fastener pushing piece to drive the surgical fastener pushing piece to apply the pressure to the surgical fastener; and a surgical fastener pushing driver mechanism, configured to move, as driven by the first driver mechanism and the second driver mechanism, along the axial direction to drive the surgical fastener pushing slide block to move along the axial direction, so that the surgical fastener pushing slide block is in contact with the surgical fastener pushing piece to apply the pressure to the surgical fastener pushing piece, wherein in a state where the second driver mechanism is connected with the first driver mechanism, an end of the transmission belt away from the first driver mechanism is connected with the surgical fastener pushing driver mechanism.
7 . The surgical stapler according to claim 6 , wherein a direction from the first end of the end effector to the second end of the end effector is a first direction; the fastener-cartridge comprises a fastener-cartridge bracket, the fastener-cartridge bracket comprises a first portion and a second portion that extend along the first direction; the first portion of the fastener-cartridge bracket and the second portion of the fastener-cartridge bracket both comprise a surgical fastener slot for accommodating the surgical fastener, and the first portion of the fastener-cartridge bracket and the second portion of the fastener-cartridge bracket define a chute extending along the axial direction; the surgical stapler further comprises a cutting device; the cutting device comprises a cutting driver mechanism; the cutting driver mechanism is configured to drive, as driven by the first driver mechanism, the cutting device to cut the target tissue; in a process that the surgical fastener pushing driver mechanism drives the surgical fastener pushing slide block to move, a cutting driver mechanism and the transmission belt enter the chute via the bendable portion and slide in the chute.
8 . The surgical stapler according to claim 2 , wherein the front articulation driver assembly comprises: a transmission mechanism which is connected with the front articulation driver member, and configured to drive, as driven by the front articulation driver member, the end effector to pivot around the bendable portion.
9 . The surgical stapler according to claim 8 , wherein the transmission mechanism comprises: a driver rack which comprises driver teeth, extends along the axial direction and is connected with the front articulation driver member to move along the axial direction as driven by the front articulation driver member; and a gear, meshed with the driver teeth, wherein the driver rack moves along the axial direction to drive the gear to rotate; the front articulation driver assembly further comprises an articulation connection portion; a first end of the articulation connection portion close to the end effector is connected with the first end of the end effector; a second end of the articulation connection portion away from the end effector comprises a terminal tooth; the terminal tooth is meshed with the gear to enable the articulation connection portion and the end effector to pivot as driven by the gear; a position where the terminal tooth meshes with the gear is in the bendable portion; a plate surface of a gear plate of the gear is substantially perpendicular to the belt surface of the transmission belt.
10 . The surgical stapler according to claim 9 , wherein the transmission mechanism comprises a plurality of gears arranged along the axial direction, and adjacent gears among the plurality of gears are meshed with each other, a gear among the plurality of gears that is closest to the end effector meshes with the terminal tooth of the second end of the articulation connection portion, and at least a gear among the plurality of gears that is farthest away from the end effector meshes with the driver teeth of the driver rack.
11 . The surgical stapler according to claim 10 , wherein a diameter of the gear plate of the gear among the plurality of gears that is closest to the end effector is less than a diameter of the gear plate of the other gears among the plurality of gears.
12 . The surgical stapler according to claim 9 , further comprising: a stabilization rack, meshed with the gear, wherein the driver rack is on a first side of the gear, the stabilization rack is on a second side of the gear that is opposite to the first side of the gear, and the stabilization rack is not connected with the front articulation driver member.
13 . The surgical stapler according to claim 9 , wherein the closing mechanism is a sleeve sleeved on an outer side of the second driver mechanism and the transmission mechanism; the fastener-cartridge assembly comprises a first end close to the sleeve, and the anvil comprises a first end close to the sleeve; in the closing stage, the second driver mechanism moves, as driven by the first driver mechanism, toward the end effector to drive the sleeve to move toward the end effector, so that the sleeve is sleeved on the first end of the fastener-cartridge assembly and the first end of the anvil to apply pressure to the first end of the fastener-cartridge assembly and the first end of the anvil, so as to close the end effector; the sleeve comprises a first portion close to the end effector and a second portion away from the end effector; the surgical stapler further comprises a rotatable sleeve connection part; the first portion of the sleeve is connected with the second portion of the sleeve through the rotatable sleeve connection part; the rotatable sleeve connection part is in the bendable portion so that the first portion of the sleeve is configured to pivot as the end effector pivots.
14 . The surgical stapler according to claim 13 , wherein the rotatable sleeve connection part comprises a first hinge structure and a second hinge structure that are connected with each other; the first hinge structure is connected with the first portion of the sleeve; and the second hinge structure is connected with the second portion of the sleeve.
15 . The surgical stapler according to claim 1 , wherein the rear articulation driver assembly further comprises: a third articulation driver mechanism, configured to drive, in a process where the articulation mechanism drives the end effector to pivot, the front articulation driver member and the rear articulation driver member to move along the axial direction toward the end effector or move along the axial direction away from the end effector, wherein the third articulation driver mechanism is further configured to be able to adjust a distance by which the front articulation driver member and the rear articulation driver member moves along the axial direction toward the end effector or moves along the axial direction away from the end effector, so as to adjust a pivoting range of the end effector.
16 . The surgical stapler according to claim 15 , wherein the third articulation driver mechanism comprises a grade adjustment switch, and the grade adjustment switch is configured to adjust, grade by grade, the distance by which the front articulation driver member and the rear articulation driver member moves along the axial direction toward the end effector, or adjust, grade by grade, the distance by which the front articulation driver member and the rear articulation driver member moves along the axial direction away from the end effector, so as to adjust, grade by grade, the pivoting range of the end effector.
17 . The surgical stapler according to claim 15 , wherein the front articulation driver member and the rear articulation driver member are both single rods extending along the axial direction; the third articulation driver mechanism is an electric driver mechanism or a manual adjustment driver mechanism.
18 . The surgical stapler according to claim 17 , wherein the electric driver mechanism comprises: an electric motor, configured to rotate to drive the front articulation driver member and the rear articulation driver member to move along the axial direction toward the end effector or move along the axial direction away from the end effector; and an articulation control switch, configured to control sending an electrical signal to the electric motor to control operation of the electric motor.
19 . The surgical stapler according to claim 18 , wherein the main body portion comprises a handle, the articulation control switch is a dial switch, and the dial switch comprises a dial provided on a surface of the handle, the dial is configured to be toggled toward a first toggle direction to drive the end effector to pivot toward the first pivoting direction, and is configured to be toggled toward a second toggle direction to drive the end effector to pivot toward the second pivoting direction, the first toggle direction is different from the second toggle direction; a grade mark is provided on the dial; the dial is toggled toward the first toggle direction by one grade range, the front pivoting driver member and the rear pivoting driver member move along the axial direction toward the end effector by one grade of distance so that the end effector rotates toward the first pivoting direction by one grade of angle; or, the dial is toggled toward the second toggle direction by one grade range, the front pivoting driver member and the rear pivoting driver member move along the axial direction away from the end effector by one grade of distance so that the end effector rotates toward the second pivoting direction by one grade of angle.

Description

TECHNICAL FIELD At least one embodiment of the present disclosure relates to a surgical stapler. BACKGROUND In surgical treatment, various surgical staplers are widely applied, for example, skin surgical staplers, digestive tract (esophagus, gastrointestinal, etc.) circular surgical staplers, rectal surgical staplers, round hemorrhoid surgical staplers, circumcision surgical staplers, vascular surgical stapler, hernia surgical stapler, lung cutting surgical stapler, etc. These surgical staplers are medically used to replace traditional manual suture devices; due to development of modern technologies and improvement of fabrication technologies, various surgical staplers currently used in clinical practice have advantages such as fast and accurate suture, easy operation, less blood loss and less side effects and surgical complications, and so on, sometimes allow resection of focus unresectable in tumor surgeries in the past, and thus are very popular and respected by clinical surgeons at home and abroad. Usually, surgical staplers perform suture with surgical fasteners made of materials such as medical stainless steel, titanium, titanium alloys, biodegradable magnesium alloys, or the like. SUMMARY At least one embodiment of the present disclosure provides a surgical stapler, and the surgical stapler includes an end effector, a closing mechanism, a surgical fastener pushing assembly, a first driver mechanism and an articulation mechanism. The end effector includes a fastener-cartridge assembly and an anvil, and at least one surgical fastener is provided in the fastener-cartridge assembly; the closing mechanism is configured to drive the fastener-cartridge assembly and the anvil to engage with each other to close the end effector so that a target tissue is clamped between the fastener-cartridge assembly and the anvil; the surgical fastener pushing assembly is configured to push the surgical fastener out of the fastener-cartridge assembly; the first driver mechanism is configured that in a closing stage, the first driver mechanism is in detachable connection with the closing mechanism to drive the closing mechanism to close the end effector; and the first driver mechanism is configured that in a surgical fastener pushing stage after the closing stage, the first driver mechanism is separated from the closing mechanism and drives the surgical fastener pushing assembly to push the surgical fastener out of the fastener-cartridge assembly to suture the target tissue; the articulation mechanism includes a front articulation driver assembly and a rear articulation driver assembly, and the front articulation driver assembly and the rear articulation driver assembly are configured to drive the end effector to pivot; the surgical stapler comprises a main body portion and a detachable portion, the detachable portion is in detachable connection with the main body portion; the end effector and the front articulation driver assembly are comprised in the detachable portion, the first driver mechanism and the rear articulation driver assembly are comprised in the main body portion; the detachable portion is in detachable connection with the main body portion to enable the front articulation driver assembly to be in detachable connection with the rear articulation driver assembly. For example, in the surgical stapler provided by at least an embodiment of the present disclosure, the front articulation driver assembly comprises a front articulation driver member, and the front articulation driver member is connected with the end effector; the rear articulation driver assembly comprises a rear articulation driver member, the rear articulation driver member and the first driver mechanism have a same extension direction and are arranged side by side, and the detachable portion is in detachable connection with the main body portion to enable the front articulation driver member to be in detachable connection with the rear articulation driver member; the extension direction of the rear articulation driver member and the first driver mechanism is an axial direction; in a process where the articulation mechanism drives the end effector to pivot, the front articulation driver member and the rear articulation driver member move toward the end effector along the axial direction to drive the end effector to pivot toward a first pivoting direction, and/or, the front articulation driver member and the rear articulation driver member move along the axial direction away from the end effector to drive the end effector to pivot toward a second pivoting direction opposite to the first pivoting direction. For example, the surgical stapler provided by at least an embodiment of the present disclosure further comprises a second driver mechanism which extends along the axial direction and is comprised in the detachable portion; the detachable portion is connected with the main body portion to enable the second driver mechanism to be in detachable connec