WO2014094571A1

WO2014094571A1 - Elongated surgical stapling device

Info

Publication number: WO2014094571A1
Application number: PCT/CN2013/089368
Authority: WO
Inventors: 陈望东; 傅开芬
Original assignee: 苏州天臣国际医疗科技有限公司
Priority date: 2012-12-18
Filing date: 2013-12-13
Publication date: 2014-06-26
Also published as: CN103860226A; CN103860226B

Abstract

An elongated surgical stapling device comprises: a main body; a cartridge holder (1), a cartridge (3), and an anvil (2) that are provided at a distal end of the main body; and a movable tool driving rod (6). The tool driving rod (6) drives a tool (7) and a firing block (5) to move. The cartridge holder (1) is pivotally provided with a safety block (8) for preventing firing for the second time. The safety block (8) is provided at the distal end of the tool driving rod (6) and the tool (7). When the device is in the initial state and after the firing is completed, the tool driving rod (6) and the tool (7) are restricted from moving from the proximal end to the distal end of the elongated surgical stapling device. The elongated surgical stapling device can be prevented from closing when the doctor does not replace the fired cartridge (3) or the cartridge (3) is not mounted in place, so as to avoid a medical accident or harm to the normal tissue; moreover, the structure is simple and effective.

Description

Straight seam cutter

This application claims the priority of the Chinese patent application filed on Dec. 18, 2012, the application number is 201210595227.6, the name of the invention is "linear slitting machine and its secondary firing prevention mechanism", the entire contents of which are incorporated by reference. In this application.

【技术领域】[Technical Field]

The invention relates to a surgical instrument, in particular to a linear slitter, belonging to the technical field of medical instruments.

【背景技术】【Background technique】

Straight seam cutters for surgery are widely used for wound suturing, internal tissue suturing and cutting. Since the development of surgery, it has become more and more inclined to minimally invasive surgery. In a broad sense, surgery that reduces trauma is called minimally invasive surgery, and narrowly defined minimally invasive surgery refers to surgery performed under endoscopy. Endoscopic surgery generally requires only a few small holes in the patient's body, and the resected, sutured tissue and auxiliary instruments are inserted into the patient from the small hole for surgery. Minimally invasive surgery brings little trauma to the patient, and the patient can recover in a short period of time, so minimally invasive surgery has received more and more attention.

US Patent No. 7,753,246 discloses a linear slitter for minimally invasive surgery, comprising an instrument body, the instrument body comprising a housing and a firing handle pivotally disposed on the housing, the housing having a A relatively moving firing ram that pushes the nail head assembly at the front end of the housing for stitching and cutting. Specifically, the nail head assembly includes a staple cartridge holder and an anvil pivotally coupled to the staple cartridge holder. The staple cartridge frame is detachably provided with a staple cartridge, and the staple cartridge is provided with a set of nail holes provided with push nails and staples, generally 4 rows or 6 rows of nail holes. The anvil is provided with a nail forming groove at a position opposite to the nailing hole. The nail head assembly further includes a pusher bar movably disposed in the socket of the nail head assembly, the distal end of the pusher bar is fixed with an I-shaped knife, and the I-shaped knife will be nailed during the advancement process The bin and the anvil are closed. The distal end of the I-shaped knife is provided with a cutting edge, and the cutting edge cuts the tissue between the staple cartridge and the anvil during the advancement of the I-shaped knife. A wedge-shaped block is arranged on both sides of the blade of the I-shaped knife. During the advancement process, the I-shaped knife drives the wedge-shaped block to push the push-pushing piece out of the staple cartridge in turn, and then the push-pushing piece pushes the staple Outside the staple cartridge and fit on the tissue. In the prior art, after the doctor completes the above-mentioned slitting operation, the instrument needs to be first reset, and then the staple cartridge is replaced, so that the slitter performs the next slitting operation.

However, because some careless doctors or inexperienced doctors will perform the next operation without replacing the fired staple cartridges, this will lead to a medical accident, that is, the removal is performed without suturing. In order to prevent such accidents from occurring, the prior art proposes a theory against secondary firing, that is, in the case where the stapled cartridge is not replaced, the firing handle cannot be pressed. In this way, medical accidents caused by doctors' misoperations are fundamentally prevented.

U.S. Patent No. 5,485,947 discloses two anti-secondary firing mechanisms. In the first mechanism, the magazine is provided with a sliding slot, and an elastic piece is slidably disposed in the sliding slot. In the initial state, the elastic piece protrudes outside the sliding groove and pushes the pushing bar upward, and the notch at the proximal end of the pushing bar is separated from the protrusion on the staple cartridge, thereby ensuring that the pushing bar can be Was promoted. When the pusher bar is moved distally, the pusher bar pushes the elastic piece into the chute, and the height of the pusher bar is lowered. When the pusher bar is reset, the protrusion is just caught in the notch of the pusher bar, so that the pusher bar cannot be moved again, and the effect of preventing secondary firing is achieved. The principle of the second mechanism is similar to that of the first mechanism in that a pivot member is used instead of the elastic piece. In the initial state, the pivot member lifts the pusher bar so that the notch on the pusher bar avoids the protrusion on the staple cartridge. When the pusher bar is reset, the pivot member is turned over, so that the height of the pusher bar is lowered, and the protrusion is just caught in the notch of the pusher bar, so that the pusher bar cannot be moved again, thereby preventing The effect of the second shot.

In the prior art, since the components involved are very small and are assembled in the staple cartridge, the production and assembly of the linear seam cutter is difficult.

【发明内容】 [Summary of the Invention]

OBJECT OF THE INVENTION: A straight seam slitter having a simple structure is proposed.

The object of the present invention can be achieved by the following technical solutions:

A linear slitter includes: a staple cartridge holder; the staple cartridge holder is detachably provided with a staple cartridge, and the staple cartridge is provided with a plurality of nail holes provided with a pusher piece and a staple a firing block for pushing the pusher piece is disposed in a sliding slot of the staple cartridge; an anvil pivotally coupled to the staple cartridge frame; a proximally located connector, the connector is movable a pusher bar and a cutter disposed at a distal end of the pusher bar are disposed, the pusher bar pushes the firing block to move; the pinch frame pivot is provided with an insurance for preventing secondary firing a block, when in an initial state, the safety block is relatively stationary by the pin holder rotation limit, and the safety block is disposed at the distal end of the pusher bar and the cutter to thereby limit the pusher bar and the cut The knife is moved from the proximal end to the distal end of the linear slitter; when in the working state, the safety block is pressed by the staple cartridge and the rotation limit is released, and the pusher bar and the cutter are separated by a linear slitter Driving the safety block when moving from the proximal end to the distal end; when the pusher bar and the cutter move from the distal end to the proximal end of the linear slitter, Said safety block is driven in the reverse rotation position and return to the initial state.

Preferably, the safety block includes a pivot hole, the safety block is pivotally disposed at a bottom of the magazine frame through the pivot hole, and a convex portion is protruded from a surface of the pivot hole Piece.

Preferably, the width of the bump is less than or equal to the width of the long groove of the magazine frame, and the protrusion protrudes into the long groove in an initial state.

Preferably, when in the operating state, the top surface of the projection projecting into the elongated slot is pressed by the lower surface of the firing block disposed in the staple cartridge.

Preferably, the safety block is further provided with a reset portion, and the reset portion and the protrusion are disposed on two sides of the pivot hole.

Preferably, in the initial state, the bump is disposed at a distal end of the reset portion.

The object of the invention is also achieved by the following technical solutions:

The present invention also discloses a linear slitter comprising a body, a staple cartridge frame disposed at a distal end of the body; a detachable magazine is disposed on the staple cartridge frame, and the staple cartridge is provided with a plurality of a nailing hole for holding a nail piece and a staple, a firing piece for pushing the nail piece is disposed in the sliding groove of the nail holder; and an anvil connected to the nail holder frame; a proximally located nozzle, wherein the nozzle is movably disposed with a pusher bar and a cutter disposed at a distal end of the pusher bar, the pusher bar pushing the firing block to move; the cartridge holder The upper pivot is provided with a safety block for preventing secondary firing, and the safety block is disposed at the distal end of the pusher bar and the cutter. When the instrument is in an initial state and a state after the firing is completed, the push is restricted. The shank and cutter move from the proximal end to the distal end of the linear slitter.

Preferably, when the instrument is in an initial state and a state after the firing is completed, the safety block is relatively stopped by the staple holder rotation limit.

Preferably, when in the working state, the safety block is pressed by the staple cartridge and the rotation limit is released, and the pusher bar and the cutter are driven by the proximal end to the distal end of the linear slitter to drive the insurance. The block rotates.

The beneficial effects of the invention are mainly embodied in: effectively preventing the doctor from closing the device without replacing the fired staple cartridge or the nail cartridge, and avoiding the occurrence of a medical accident or causing damage to normal tissues, and the structure is simple and effective.

【附图说明】 [Description of the Drawings]

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view showing the initial state of the preferred embodiment of the present invention.

Figure 2 is a cross-sectional view taken along line C-C of Figure 1.

Figure 3 is an enlarged cross-sectional view taken along line A-A of Figure 1.

4 is a perspective view of a cartridge holder disposed in a nozzle in accordance with a preferred embodiment of the present invention.

Figure 5 is a perspective view of a safety block in accordance with a preferred embodiment of the present invention.

Figure 6 is a front elevational view of the preferred embodiment of the present invention in an operational state.

Figure 7 is a cross-sectional view taken along line D-D of Figure 6.

Figure 8 is an enlarged cross-sectional view taken along line B-B of Figure 6.

Figure 9 is a front elevational view of a preferred embodiment of the present invention against secondary firing.

Among them: 1, nail warehouse frame; 11, long groove; 12, side wall; 2, nail anvil; 3, nail warehouse; 4, take over; 5, firing block; 51, lower surface; 6, push knife bar; Cutting knife; 8, safety block; 81, pivot hole; 82, bump; 83, top surface; 84, inner side surface; 85, front end surface; 86, rear end surface; 87, reset portion.

【具体实施方式】【detailed description】

Example 1

The present invention discloses a linear slitter for minimally invasive surgery, as shown in FIG. 1, consistent with the prior art, comprising: a body, a socket 4 at the distal end of the body. The distal end of the nozzle 4 is a nail head assembly, comprising: a staple cartridge holder 1 and an anvil 2 pivotally connected to the magazine holder 1. The staple cartridge frame 1 is detachably provided with a staple cartridge 3, and the staple cartridge 3 is provided with a set of nailing holes provided with a pusher piece and a staple; and a firing block for pushing the pusher piece 5 is disposed in the chute of the staple cartridge 3.

a pusher bar 6 is movably disposed in the connecting tube 4; the distal end of the pusher bar 6 is fixed with all the blades, and the cutter is provided with a bump on the upper and lower sides, and has a I-shaped shape, and the I-shaped cutter 7 in the process of advancing, compressing the tissue to make the expanded tissue thin and uniform, thereby further closing the staple cartridge 3 and the anvil 2; the distal end of the I-knife is provided with a blade, and the pusher bar 6 is pushed The cutting blade 7 cuts the tissue between the staple cartridge 3 and the anvil 2 during the advancement, and the pusher bar 6 pushes the firing block 5 to push the pusher pieces sequentially to the nail during the advancement process. Outside the cartridge 3, the pusher tab pushes the staple out of the staple cartridge 3 and fits over the tissue.

As shown in FIG. 2, the present invention is characterized in that the magazine frame 1 is pivotally provided with a safety block 8 for preventing secondary firing, and the safety block 8 is disposed on the pusher bar 6 and the cutter. The distal end of 7 limits the movement of the pusher bar 6 and the cutter 7 from the proximal end to the distal end of the linear slitter when the instrument is in the initial state and after the firing is completed.

Specifically, as shown in FIG. 5, the safety block 8 has a substantially sheet-like structure including a pivot hole 81 for pivotally connecting the magazine frame 1, and one end of the pivot hole 81. A bump 82 is protruded from the surface thereof, and the bump 82 includes a top surface 83, an inner side surface 84, a front end surface 85, and a rear end surface 86. 4, the width of the protrusion 82 is less than or equal to the width of the long groove 11 of the magazine frame 1, and the thickness of the protrusion 82 is greater than the depth of the long groove 11, so that the protrusion 82 is In the initial state, it projects into the long groove 11. The safety block 8 is further provided with a reset portion 87. The reset portion 87 and the protrusion 82 are disposed on two sides of the pivot hole 81. The reset portion 87 has a barbed-like sheet structure. Specifically, as shown in FIG. 1 , the safety block 8 is pivotally disposed at the bottom of the magazine frame 1 through a pivot hole 81 .

As shown in FIG. 1 to FIG. 5, when in the initial state, the projection 82 of the safety block 8 projects into the long groove 11, and the inner side surface 84 of the safety block 8 is side of the long groove 11. The wall 12 is constrained so that the safety block 8 cannot pivot about it. Since the safety block 8 is disposed at the distal end of the pusher bar 6 and the cutter 7, and the projection 82 of the safety block 8 is located on the movement path of the pusher bar 6, that is, the bump 82 It passes through the long slot 11 and projects into the interior of the magazine holder 1, and its top surface 83 has been raised above the bottom surface of the interior of the magazine holder 1 (shown in Figure 4). Thus, the safety block 8 can limit the movement of the pusher bar 6 and the cutter 7 from the proximal end to the distal end of the linear slitter. At this time, the safety block 8 functions as an insurance.

As shown in FIGS. 6 to 8, when in the working state, the staple cartridge 3 is mounted in the magazine holder 1, and the top surface 83 of the projection 82 projecting into the long groove 11 is disposed in the magazine 3 The lower surface 51 of the inner firing block 5 is pressed. At this time, the protrusion 82 is withdrawn from the long groove 11, that is, the inner side surface 84 of the protrusion 82 and the side wall 12 of the long groove 11 are mutually displaced in the height direction, so that the safety block 8 is no longer subjected to the long groove. The restraining of the side walls can in turn be pivoted relative to the magazine frame 1. When the pusher bar 6 and the cutter 7 are moved from the proximal end to the distal end of the linear slitter, the pusher bar 6 drives the front end face 85 of the safety block 8 to move, thereby driving the safety block 8 Rotate. At this time, the insurance on the movement path of the pusher bar 6 is released, and the pusher bar 6 and the cutter 7 are moved from the proximal end to the distal end of the linear slitter, thereby performing suturing and cutting.

When the instrument is fired, as shown in FIG. 9, the firing block 5 stays at the distal end of the linear slitter, and the pusher bar 6 and the cutter 7 are moved from the distal end to the proximal end of the linear slitter. At the time of resetting, the resetting portion 87 of the safety block 8 is driven by the retracting ejector lever and the cutter to rotate the safety block 8 in the opposite direction, and the projection 82 again protrudes into the long groove 11. As with the initial phase of the fuse effect, the tabs 82 limit the movement of the pusher bar 6 and the cutter 7 from the proximal end to the distal end of the linear slitter. This achieves the purpose of preventing secondary firing.

The words expressing position and orientation described in the present invention are referenced by the operator of the device, with one end near the operator being the proximal end and one end remote from the operator being the distal end.

The present invention has various embodiments, and all technical solutions formed by equivalent transformation or equivalent transformation are within the scope of the present invention.

Claims

A linear seam cutter comprising:

a staple holder (1); the staple cartridge holder (1) is detachably provided with a staple cartridge (3), and the staple cartridge (3) is provided with a plurality of push nails and staples a nailing hole, the firing block (5) for pushing the pusher piece is disposed in the sliding groove of the staple cartridge (3);

An anvil (2) pivotally coupled to the magazine frame (1);

a proximally located connector (4), wherein the adapter (4) is movably provided with a pusher bar (6) and a cutter (7) disposed at a distal end of the pusher bar (6), Pushing the knife bar (6) to push the firing block (5) to move;

The utility model is characterized in that: the magazine frame (1) is pivotally provided with a safety block (8) for preventing secondary firing.

When in the initial state, the safety block (8) is relatively stationary by the rotation of the magazine holder (1), and the safety block (8) is provided on the pusher bar (6) and the cutter (7). The distal end of the tube further limits the movement of the pusher bar (6) and the cutter (7) from the proximal end to the distal end of the linear slitter;

When in the working state, the safety block (8) is pressed by the staple cartridge and the rotation limit is released, and the pusher bar (6) and the cutter (7) are moved from the proximal end to the distal end of the linear slitter. Driving the safety block (8) to rotate;

When the pusher bar (6) and the cutter (7) are moved from the distal end to the proximal end of the linear slitter, the safety block (8) is driven to reverse rotation and return to the position at the initial state.
The linear slitter according to claim 1, wherein the safety block (8) comprises a pivot hole (81), and the safety block is pivotally disposed on the staple cartridge through the pivot hole At the bottom of the frame, an end of the pivot hole (81) is perpendicularly provided with a bump (82).
The linear slitter according to claim 2, wherein the width of the projection (82) is less than or equal to the width of the elongated slot (11) of the cartridge holder (1), the projection (82) ) protrudes into the long groove (11) in the initial state.
The linear slitter according to claim 3, wherein a top surface (83) of the projection (82) projecting into the elongated groove (11) is provided to the nail when in an operating state The lower surface (51) of the firing block (5) in the cartridge (3) is pressed.
The linear slitter according to claim 2, wherein the safety block is further provided with a reset portion, and the reset portion and the protrusion are disposed on both sides of the pivot hole.
The linear slitter according to claim 5, wherein in the initial state, the projection is provided at a distal end of the reset portion.
A linear slitter includes a body, a staple cartridge frame (1) disposed at a distal end of the body; and a staple cartridge (3) detachably disposed on the staple cartridge holder (1), the staple cartridge ( 3) a plurality of nailing holes provided with push nails and staples, and a firing block (5) for pushing the pusher nails is disposed in the sliding groove of the staple cartridge (3);

An anvil (2) pivotally coupled to the magazine frame (1);

a proximally located connector (4), wherein the adapter (4) is movably provided with a pusher bar (6) and a cutter (7) disposed at a distal end of the pusher bar (6), Pushing the knife bar (6) to push the firing block (5) to move;

The utility model is characterized in that: the magazine frame (1) is pivotally provided with a safety block (8) for preventing secondary firing, and the safety block (8) is disposed on the pusher bar (6) and the cutter The distal end of (7) restricts the movement of the pusher bar (6) and the cutter (7) from the proximal end to the distal end of the linear slitter when the instrument is in an initial state and a state after the firing is completed.
The linear slitter according to claim 7, wherein the safety block (8) is rotated by the staple cartridge holder (1) while the instrument is in an initial state and a state after the firing is completed. still.
The linear slitter according to claim 8, wherein when the working state, the safety block (8) is pressed by the staple cartridge and the rotation limit is released, the pusher bar (6) and the cut When the knife (7) is moved from the proximal end to the distal end of the linear slitter, the safety block (8) is driven to rotate.
The linear slitter according to claim 7, wherein the safety block (8) comprises a pivot hole (81), and the safety block is pivotally disposed on the staple cartridge through the pivot hole At the bottom of the frame, an end of the pivot hole (81) is perpendicularly provided with a bump (82).
The linear slitter according to claim 10, wherein the width of the projection (82) is less than or equal to the width of the elongated slot (11) of the cartridge holder (1), the projection (82) ) protrudes into the long groove (11) in the initial state.
The linear slitter according to claim 11, wherein when in an operating state, a top surface (83) of the projection (82) that projects into the elongated groove (11) is provided to the nail The lower surface (51) of the firing block (5) in the cartridge (3) is pressed.
The linear slitter according to claim 10, wherein the safety block is further provided with a reset portion, and the reset portion and the protrusion are disposed on both sides of the pivot hole.
The linear slitter according to claim 13, wherein in the initial state, the projection is provided at a distal end of the reset portion.