WO2006079261A1

WO2006079261A1 - Surgical stapler

Info

Publication number: WO2006079261A1
Application number: PCT/CN2005/000943
Authority: WO
Inventors: Wangdong Chen; Weizhong Yin; Jiang Lin; Mingyao Lu
Original assignee: Suzhou Touchstone International Medical Science Co., Ltd
Priority date: 2005-01-26
Filing date: 2005-06-29
Publication date: 2006-08-03
Also published as: CN100394892C; CN1810215A

Abstract

A surgical stapler comprises a flexible tube, an anvil assembly, a staple cartridge assembly, a feed firing body and a feed firing trigger. A restoring spring is arranged on the feed firing trigger, and a bush is arranged in the housing of the firing body, with one of its ends extending out of the front of the firing body. A follower rod, the front of which is covered by a connecting sleeve, is disposed in the bush, while one end of the connecting sleeve is associated with an active rod. A switch means is arranged on the rear part of the follower rod, and a feeding switch mechanism is arranged between the active rod and the follower rod.

Description

Surgical stapler

The invention relates to a medical device, in particular to a medical binding device, in particular to a surgical binding technology background

Currently, domestic and foreign surgical staplers use a tail thread adjustment or double thread adjustment movement mechanism, plus a single or double handle firing and binding mechanism. In the process of thread adjustment, the speed control is always unsatisfactory, and the slow-adjustment after fast-forward before binding, the quick exit after binding, and the use of the whole process are too complicated, and the hand is constantly switching. Location, extended surgery time, etc. Summary of the invention

The object of the present invention is to solve the above-mentioned drawbacks of the prior art and to provide a binding device for suturing a circular end (such as a broken end after bowel resection) in a surgical procedure, in particular, a fast forward at the body. And a single-handle controlled surgical stapler.

The object of the present invention is achieved by the following technical solutions.

A surgical binding device comprises an elbow, an anvil assembly, a nail assembly, and a feed firing gun body. The feed firing gun body is connected to the elbow through the gun body shell, and the lower portion of the outer shell is a handle. The handle is provided with a feed firing wrench, a return spring is arranged on the feed firing wrench, and an inner bushing is arranged in the gun body shell, and the end of the inner bush protrudes from the head of the gun body shell, and the inner bushing There is a follower rod in the front part of the follower rod, that is, a section close to the elbow is provided with a connecting sleeve, and the connecting sleeve is provided with a connecting rod, one end of the connecting rod is connected with the connecting piece, and the other end is stuck on the driven head The circlip of the part is snapped, one end of the connecting sleeve is in contact with the push rod, the other end is in contact with the active rod, the active rod is sleeved in the middle of the driven rod, and the active rod is fed on the active rod and the handle is arranged on the handle The feed firing wrench is interlocked, and the lower surface of the middle portion of the inner bushing is axially opened with an active rod moving groove corresponding to the active rod feeding and firing mechanism, and the driven rod locking mechanism and the hand are provided at the rear portion of the driven rod. The handle is connected, and a switching device is arranged in the rear part of the follower rod, and a feed switching machine is arranged between the active rod and the driven rod

The object of the present invention can also be further achieved by the following technical solutions.

In the above surgical stapler, the active rod feeding and firing mechanism is a ratchet mechanism, and a ratchet is provided under the active rod, and a pawl is provided on the feeding and firing wrench to engage with the pawl.

In the foregoing binding instrument, the active rod feeding and firing mechanism is a damping mechanism, and a force spring and a dialing piece are sleeved on the active rod, and the other end of the dialing piece is fired with the feeding The handles are mated. In the foregoing binding instrument, the follower rod feeding locking mechanism is a ratchet mechanism, and a ratchet is provided under the driven rod, and a pawl is provided on the handle to engage with the same.

In the above surgical stapler, the follower rod feeding locking mechanism is a damper mechanism, and a spring and a locking piece are sleeved on the driven rod, and the other end of the locking piece is connected to the outer casing.

In the above surgical stapler, the front, middle and rear limit locking blocks or steps are sequentially arranged at the front, middle and rear positions of the follower rod.

In the above surgical device, the gun body shell and the elbow are spirally connected by a rotary connecting knob, and the inner end cavity of the rotary connecting knob and the tail end of the elbow are provided with positioning steps, and the rotary connecting knob is rotated. The rear end cavity is provided with an internal thread, and one end of the rotation preventing connector is screwed to the rear end cavity of the rotary connection knob, and the other end of the rotation preventing connector is engaged with the gun body casing head. In the foregoing surgical binding device, the switching device includes a safety button having a switching sleeve and a rear end of the follower body of the driven rod, the switching sleeve is disposed at a rear portion of the driven rod, and a switching port is provided at a front end of the switching sleeve. A safety return spring is disposed at a tail end of the switch sleeve, and two ends of the safety return spring are respectively connected to the switch sleeve and the safety button, and the safety button is provided with a limit rod, and the gun body shell and the switch sleeve are There are limit holes on the upper limit rod. The invention has the advantages of breaking the conventional limited thread adjustment mechanism and two operations The steps are separated by a cumbersome, delayed, and the like, and a single handle is used to advance the binding and stitching process. The anvil and the housing are fixed, and the pusher piece and the nail barrel are initially moved together. When binding, the pusher piece is separately moved by switching the knob to achieve the effect of nailing and suturing the tissue. Throughout the whole process, the handle is held by one hand, and the speed of advancement can be arbitrarily adjusted by controlling the magnitude of the grip force. When the binding is completed, the patient can quickly withdraw, and the stability of the operation can be maintained, and the operation time can be reduced. In addition, in this modification, the function of turning the binding body or the head can be achieved by adjusting the steering connection knob, so that the operation of the operation can be facilitated by the steering shift in the case of unfavorable operation.

The objects, advantages and features of the invention are illustrated and described by way of non-limiting description

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

2 is a cross-sectional structural view of the gun body of the present invention.

Figure 3 is a schematic cross-sectional view of the A-A of Figure 2;

Figure 4 is a schematic view showing another structure of the present invention.

Fig. 5 is a schematic view showing still another structure of the present invention.

Fig. 6 is a schematic view showing another structure of the switching device of the present invention.

Figure 7 is a schematic view showing the structure of the follower rod of the present invention.

Figure 8 is a schematic bottom view of Figure 7.

Fig. 9 is still another schematic view of the follower rod structure of the present invention.

Figure 10 is a schematic bottom view of Figure 9.

Figure 11 is another schematic view of the follower rod structure of the present invention.

Figure 12 is a schematic bottom view of Figure 11;

Figure 13 is another schematic diagram of the switching mode of the present invention. Figure 14 is still another schematic diagram of the switching mode of the present invention.

Figure 15 is still another schematic diagram of the switching mode of the present invention.

detailed description

As shown in FIG. 1-15, the present invention comprises an elbow 3, an anvil assembly 1, a nail barrel assembly 2, a feed firing gun body, and a feed firing gun body is connected to the elbow 3 through a rotating connection through the gun body casing 11. The knob 6 is screwed, and the inner end cavity of the rotary connecting knob 6 is provided with a positioning step at the end of the curved pipe 3, and the inner end of the inner end of the rotary connecting knob ⁶ is provided with an internal thread, and one end of the rotation preventing connector is connected with the rotation. The rear end cavity of the knob ⁶ is screwed, and the other end of the rotation preventing connector is engaged with the head of the gun body. The lower part of the outer casing is a handle 21, the handle 21 is provided with a feed firing wrench 25, the feed firing wrench 25 is provided with a return spring 24, and the inner casing 11 is provided with an inner bushing 9, the inner bushing 9 The end portion protrudes from the head of the gun body casing 11, and the driven rod 12 is disposed in the inner bushing 9. The connecting sleeve 26 is sleeved in the front portion of the driven rod 12, that is, near the elbow 3. The connecting sleeve 26 is provided. There is a connecting rod 8, one end of the connecting rod 8 is connected with the connecting piece 5, and the other end is engaged by a snap spring 10 stuck on the head of the driven rod 12. One end of the connecting sleeve 26 is connected with the push rod 4, and the other end is connected with the active rod 14 is connected, the active rod 14 is sleeved in the middle of the driven rod 12, and the active rod 14 is provided with the active rod 14 feeding stroke; the mechanism is interlocked with the feeding firing wrench 25 on the handle 21, under the middle section of the inner bushing The surface corresponds to the active rod 14 feeding the firing mechanism at the axial direction with the active rod 14 moving groove, and the rear rod of the driven rod 12 is provided with the driven rod locking mechanism and the handle 21, the active rod feeding and firing mechanism is In the ratchet mechanism, a ratchet is provided under the active lever 14, and a pawl is provided on the feed firing wrench 25 to engage with the pawl. The follower rod feeding locking mechanism is a ratchet mechanism, and a ratchet is provided under the driven rod 12, and a pawl is provided on the handle 21 to engage with the pawl. A switching device is fitted to the rear portion of the follower lever 12. The switching device includes a safety button with a switching sleeve 16 and a tail portion of the rear portion of the driven rod 12. The switching sleeve 16 is sleeved in the rear portion of the driven rod, and a switching port 43 is provided at the front end of the switching sleeve. The rear end of the sleeve 16 is provided with a safety return spring 18, and two ends of the safety return spring 18 are respectively connected to the switching sleeve 16 and the safety button 17, and the safety button 17 is provided with a limiting rod 28, in the above-mentioned gun body The outer casing 11 and the switching sleeve 16 have a limit The limiting hole 19 of the rod 28 is matched. The safety button 17 can also be directly integrated with the switching sleeve, and the safety button 17 is partially connected to the gun body through the locking device. The locking device comprises a ball 37, a spring 35 and a lock nut 38. The front, middle and rear limit locking blocks or steps 13, 15, 44 are sequentially arranged at the front, middle and rear positions of the driven rod 12 to take the active rod 14 and the switching sleeve 16.

The invention is at work:

Before the binding, the original mechanism is in the original state, the wrench 25 is gripped inwardly to move the pawl 23 forward, and the pawl 23 pushes the active rod 14 forward, between the active rod 14 and the driven rod. The square pin 13 is brought forward together, and the active rod 14 and the driven rod 15 are respectively connected with the pusher piece and the nail barrel through the push rod 4, the connecting piece 5, etc., and the push nail piece and the nail barrel are started together. The effect of the forward movement is that when the grip is released, the handle and the pawl 23 are reset by the return spring 24, and the active lever 14 is clamped together by the pin 15 P on the follower lever, and the follower lever 12 is fixed at The pawl 23 and the limiting block 22 on the shell of the gun body timely fix their forward position to reduce the displacement of the ratchet step.

When taking out at the time of binding: When entering the position required for binding, the circlip 10 on the connecting rod 8 rises under the action of the thrust of the tapered head of the driven rod 12 due to the resisting force when the front portion transmits the clamping tissue. It is opened and stuck on the inner bushing 9 fixed with the gun body casing to achieve the effect of micro-in and lock-up. Then, the safety button 17 is pulled out, and the limiting rod 28 is slid out of the limiting rod slot 19 on the gun body casing 11, and is rotated by 90 degrees; or the safety button 17 can be directly integrated with the switching sleeve 16. , directly rotated by 90 degrees, and driven by the pin 27 and the follower rod 12 of the inner sleeve of the switching sleeve 16, and the follower rod 12 is still fixed by the pawl 23, the clamping block 22 (on the driven rod The tooth angle is 180 degrees, when the rotation, the pawl 23 and the limiting block 22 slide on the tooth surface, and the pin 13 is turned to the depth groove entrance of the active rod 14, so that the active rod 14 can be detached from the driven rod. 12 move forward. The wrench 25 is gripped again, that is, the active rod 14 is disengaged from the follower rod 12, and the connecting rod, the push rod, the pusher piece, and the like are pushed to achieve the effect of forming the nail and completing the operation. Then, release the handle and rotate the switch sleeve 90 degrees again, so that the main and follower levers are respectively disengaged from the pawl 23 and the limit block 22, and the knife, the pusher piece and the like are moved backward by the binding reset spring of the front part, and the slave is driven. The moving piece 12 and the like move the piece, and the anvil and the nail barrel are quickly separated, and the binding interface is retracted.

The feed switching structure of the present invention can take a variety of forms:

As shown in FIG. 13, the driven rod 12 is provided with a semi-circular counterbore, and the active rod 14 is provided with a circular hole. When the active rod is sleeved on the driven rod and the two-inch is aligned, an appropriate hole is placed in the hole. The ball 40 is springed and a spring 39 is added to the ball 40 and locked by a lock nut 38. When the instrument is used for the stapling operation, since the front portion has no resistance at the beginning, the active rod 14 drives the follower rod 12 through the ball 40 to advance forward, and when the mismatched portion is received, the front portion of the follower rod 12 is received. The resistance of the tissue increases, forcing the ball 40 to move into the interior of the active lever 14, disengaging the follower lever 12, and the active lever 14 continues to move forward to complete the firing of the staple.

As shown in FIG. 14, the driven rod 12 has a counterbore, and the active rod 14 has a hole. When the active rod is sleeved on the driven rod and the two holes are aligned, a suitable crack is placed in the hole. The cylinder 41 (or two strong magnets connected) is locked by a lock nut 38. When the instrument is used for the stapling operation, since the front portion has no resistance at the beginning, the active rod 14 drives the follower rod 12 through the column 41 to advance forward, and when approaching the binding portion, the front portion of the follower rod 12 is received. The resistance of the tissue increases, forcing the cylinder 41 to split from the middle (or the magnet to split the bird), causing the follower rod 12 to disengage, and the active rod 14 continues to move forward to complete the movement of the staple.

As shown in FIG. 15, the driven rod 12 has a semi-circular counterbore, and the active rod 14 has a circular hole. When the active rod is sleeved on the driven rod and the two holes are aligned, an appropriate hole is placed in the hole. The ball 42 is placed, and the top of the ball 40 just abuts against the outer wall portion of the active lever and is inserted into the inner bushing 9. When the instrument is used for the stapling operation, since the front portion has no resistance at the beginning, the active rod 14 pushes the follower rod 12 forward by the ball 42, and when the binding portion is engaged, the ball 42 enters the inner bushing 9. At the gap, the follower lever 12 is disengaged from the active lever 14, and the active lever 14 continues to move forward to complete the movement of the staple.

As shown in FIG. 4 to FIG. 5, the active rod feeding and firing mechanism is a damping mechanism, and the active rod 14 is sleeved with a force receiving spring 32 and a dialing piece 34, and the other end of the dialing piece 34 is fed with the feed. The handles are mated. The follower rod feeding locking mechanism is a damping mechanism, and the follower rod 12 is sleeved with a spring 30 and a locking piece 29, and the other end of the locking piece 29 is connected to the outer casing. Initially, the mechanism is in the original state, and the wrench 25 is gripped inwardly to drive the dial 34 to move forward, and the dial 34 pushes the active lever 14 forward. The square pin 13 is obtained between the active lever 14 and the driven lever. The two are moved forward together, and the active rod 14 and the driven rod 15 are respectively connected to the pusher piece and the nail barrel through the push rod 4, the connecting piece 5, etc., and the pusher piece and the nail barrel move forward together at the beginning. The effect is that when the grip is released to the bottom, the handle and the dial 34 are reset by the return spring 32, and the active lever 14 is restrained by the pin 15 on the follower lever, and the follower lever 12 is connected by the pin 31. The locking piece 29 on the gun body casing is fixed in its forward position by the force of the spring 30. When entering the position required for binding, the circlip 10 on the connecting rod 8 is lifted under the action of the thrust of the tapered head of the follower rod 12 due to the contact force transmitted from the front portion to the clamping mechanism, and is stuck On the inner bushing 9 fixed to the gun body casing 11, the effect of micro-in and lock-up is achieved. Next, the rotary switching sleeve 16 is at 90 degrees, and drives the driven rod 12 that is engaged with the inner slot of the switching sleeve 16 by the pin 27, and the pin 13 is turned to the depth groove entrance of the active rod 14, so that the active rod 14 It is possible to move forward from the follower lever 12. The wrench 25 is gripped again, and even if the active lever 14 is disengaged from the follower lever 12, the connecting rod, the push rod, the pusher piece, and the like are pushed, and the effect of forming the nail and completing the surgery is achieved.

In addition to the above-described embodiments, the invention may have other embodiments. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

Demand

A surgical binding device comprising a bending tube, an anvil assembly, a nail barrel assembly, a feed firing gun body, a feed firing gun body connected to the elbow through the gun body shell, and a lower portion of the outer shell of the outer shell The utility model is characterized in that a feed firing wrench is arranged on the handle, a return spring is arranged on the feed firing wrench, and an inner bushing is arranged in the gun body shell, and the end of the inner bushing protrudes from the head of the gun body shell. a follower rod is arranged in the inner bushing, and a connecting sleeve is arranged in a section of the front side of the driven rod near the elbow, and a connecting rod is arranged in the connecting sleeve, one end of the connecting rod is connected with the connecting piece, and the other end is passed through the card. The circlip of the driven rod head is snapped, one end of the connecting sleeve is connected with the push rod, the other end is connected with the active rod, the active rod is sleeved in the middle of the driven rod, and the active rod feeding and firing mechanism is arranged on the active rod In conjunction with the feed firing wrench on the handle, the lower surface of the middle portion of the inner bush is axially opened with an active rod moving groove corresponding to the active rod feeding and firing mechanism, and the driven rod is locked at the rear portion of the driven rod. The mechanism is connected to the handle, in the rear sleeve of the follower rod There is a switching device, and a feed switching mechanism is provided between the active lever and the driven lever.

2. The binding apparatus according to claim 1, wherein the active rod feeding and firing mechanism is a ratchet mechanism, and a ratchet is provided under the active side, and a pawl is provided on the feeding and firing wrench to engage the same. .

3. The binding apparatus according to claim 1, wherein the active rod feeding and firing mechanism is a damping mechanism, and the force spring and the dialing piece are sleeved on the active rod, and the other end of the dialing piece is The feed firing handle is a touch fit.

4. The surgical stapler of claim 1, wherein the follower lever feed locking mechanism is a ratchet mechanism, the ratchet rod is provided with a ratchet underneath, and a pawl is provided on the handle for engagement therewith.

5. The surgical stapler according to claim 1, wherein the follower rod feeding locking mechanism is a damper mechanism, and the follower rod is sleeved with a spring and a locking piece, and the other end of the locking piece is connected at On the outer casing.

6. The surgical stapler according to claim 1, wherein the front section of the follower rod, The front, middle and rear limit locking blocks or steps are arranged in the middle and rear sections.

The surgical stapler according to claim 1 , wherein the gun body shell and the elbow are screwed through the rotary connection knob, and the inner end cavity of the rotary connection knob and the tail end of the elbow are provided with a positioning step. The inner end of the rotary connecting knob has an internal thread, and one end of the rotation preventing connector is screwed to the rear end cavity of the rotary connecting knob, and the other end of the rotation preventing connector is engaged with the head of the gun body.

8. The surgical stapler according to claim 1, wherein the switching device comprises a safety button having a switching sleeve and a tail portion of the rear portion of the driven rod, and the switching sleeve is disposed at a rear portion of the driven rod. a switching port is disposed at a front end of the switching sleeve, and a safety return spring is disposed at a tail end of the switching sleeve, and two ends of the safety return spring are respectively connected to the switching sleeve and the safety button, and the safety button is provided with a limiting rod In the above-mentioned gun body casing and the switching sleeve, there is a limiting hole matched with the limiting rod.

9. The surgical stapler according to claim 1, wherein the switching device comprises a switching sleeve and a safety button, and the switching sleeve is disposed at a rear portion of the driven rod, and a switching port is provided at a front end of the switching sleeve. The safety button is integrated with the switching sleeve. In order to switch the tail of the sleeve, the safety button portion is connected with the gun body through the locking device, and the locking device comprises a ball, a spring and a lock nut.

10. The surgical stapler according to claim 1, wherein the feed switching mechanism is disposed between the active rod and the driven rod, wherein the driven rod has a semi-circular counterbore, and the active rod is opened. a circular hole that should cooperate with the upper semi-circular sinker L^ of the driven rod. After the two holes are fitted, the ball and the spring are placed or a fragile cylinder or two strong magnets are placed, and the locking is tight. The nut is locked; or a ball is placed inside the two holes, and the top of the ball just reaches the outer wall of the active rod, and when inserted into the inner bush, the ball enters the gap of the inner bush.