Anti-backslip anastomat

Abstract

The present application relates to a kind of anti-backlash anastomat, it includes gun body, movable handle, middle shaft, adjusting nut and push nail cylinder;The front end of the middle shaft is equipped with the seat of resistance nail, its rear end is equipped with the thread area matched with adjusting nut, the push nail cylinder is set in the outer periphery of middle shaft, and it is driven to move forward and backward by movable handle, the inside of the gun body is equipped with the deformable hoop and the limiting sleeve driving hoop retraction;The hoop is fixed in the side wall of gun body, middle shaft is slidably arranged in the middle hole of hoop;The limiting sleeve is arranged in the rear side of hoop, and it is fixedly connected on the push nail cylinder of front side.The purpose of the present application is to provide a kind of anti-backlash anastomat, can stabilize the anastomosis gap when anastomat firing.The present application has the advantages that: hoop is embraced tightly middle shaft when anastomat firing, prevents middle shaft from backtracking, does not affect adjusting nut to drive middle shaft to advance, retreat in non-firing state.

Description

Technical Field

[0001] This invention relates to the field of medical devices, and in particular to an anti-retraction stapler. Background Technology

[0002] Currently, staplers are widely used in open surgeries. They are primarily used, but not limited to, suturing of the digestive tract (esophagus, stomach, intestines, etc.) and foreskin. The working principle of a stapler is similar to that of a stapler. It inserts two rows of interlaced, parallel staples into the tissue, while a cutting blade cuts away excess tissue to achieve the suturing effect. During operation, rotating the adjusting nut clockwise to the firing zone activates the pusher, which in turn pushes the pusher blade, ejecting the staples from the staple magazine. Guided by the anvil groove, the staples are shaped into a "B" shape. The excess tissue after suturing is then cut away, completing the tissue anastomosis.

[0003] The main components controlling the forward and backward movement of the anastomosis device are the adjusting nut and the central shaft. The reliability of the anastomosis gap is ensured by the reinforced thread at the end of the adjusting nut connecting to the central shaft. During firing, it must overcome the forward thrust generated by the cutting blade cutting the pad ring and the formation of the sutures. When the thrust exceeds the connecting force between the central shaft and the adjusting nut, the central shaft moves forward, causing the adjusting nut to "retract." This increases the gap between the anastomosis end face and the staple cartridge end face, potentially leading to cutting and anastomosis failure during surgery, thus increasing the risk of surgical failure. Summary of the Invention

[0004] The purpose of this invention is to provide an anti-reverse stapler that can stabilize the stapler gap when it is fired, and avoid staple failures such as poor staple formation and incomplete cutting caused by the forward movement of the central shaft.

[0005] The objective of this invention is achieved through the following technical solution: an anti-retraction stapler, comprising a gun body, a movable handle, a central shaft, an adjusting nut, and a pusher sleeve; the front end of the central shaft is provided with a pin stop, and the rear end is provided with a threaded area that mates with the adjusting nut; the pusher sleeve is sleeved on the outer periphery of the central shaft and is driven to move back and forth by the movable handle; the gun body has a deformable hoop and a limiting sleeve for driving the hoop to retract; the hoop is fixed to the side wall of the gun body, and the central shaft slides through the central hole of the hoop; the limiting sleeve is located on the rear side of the hoop and is fixedly connected to the pusher sleeve on the front side; the central shaft, hoop, and limiting sleeve are coaxially arranged.

[0006] Compared with the prior art, the advantages of the present invention are as follows:

[0007] 1. When the stapler is fired, the clamping ring holds the central shaft tightly to prevent the central shaft from retracting. When not firing, it does not affect the adjusting nut from driving the central shaft forward and backward.

[0008] 2. No matter how large the firing force, the central shaft is held firmly and does not retract, ensuring a stable anastomotic gap. This guarantees proper shaping of the anastomotic staples and normal tissue cutting, avoiding risks such as anastomotic leakage and bleeding. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an embodiment of the anti-retraction stapler of the present invention.

[0010] Figure 2 This is a schematic diagram of the state before the anti-retrograde stapler is fired.

[0011] Figure 3 This is a schematic diagram showing the state of the anti-retrograde stapler after it has been fired.

[0012] Figure 4 This is a schematic diagram of the connection relationship of the limit sleeve.

[0013] Figure 5 This is a schematic diagram of the connection relationship between the hoop and the ring.

[0014] Figure 6 This is a schematic diagram of the hoop structure.

[0015] Figure 7 This is a schematic diagram of the limiting sleeve.

[0016] Labeling explanation: 1 Gun body, 2 Movable handle, 3 Center rod, 4 Adjusting nut, 5 Nail pusher, 6 Nail anchor, 7 Hoop ring, 7-1 Claw, 8 Limiting sleeve, 8-1 Connecting plate, 9 Nail cartridge, 10 Nail pusher, 11 Fitting gap. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0018] like Figures 1 to 7 The diagram shown is a schematic representation of an anti-retraction stapler provided by the present invention.

[0019] An anti-retraction stapler includes a gun body 1, a movable handle 2, a central shaft 3, an adjusting nut 4, and a pusher cylinder 5; the front end of the central shaft 3 is provided with a nail abutment 6, and the rear end is provided with a threaded area that mates with the adjusting nut 4; the pusher cylinder 5 is sleeved on the outer periphery of the central shaft 3 and is driven to move back and forth by the movable handle 2; the gun body 1 is provided with a deformable hoop 7 and a limiting sleeve 8 that drives the hoop 7 to retract inward.

[0020] The hoop 7 is fixed to the side wall of the gun body 1, and the central shaft 3 slides through the central hole of the hoop 7; the limiting sleeve 8 is located on the rear side of the hoop 7 and is fixedly connected to the pusher sleeve 5 on the front side; the central shaft 3, the hoop 7 and the limiting sleeve 8 are coaxially arranged.

[0021] The rear side of the hoop 7 is provided with several ring-shaped claws 7-1.

[0022] The radius of the central hole of the limiting sleeve 8 gradually decreases from front to back to form a tapered surface for driving the hoop 7 to retract inward, and the minimum radius of the limiting sleeve 8 is greater than the radius of the central shaft 3.

[0023] The outer contour of the hoop 7 matches the tapered surface of the hole in the limiting sleeve 8.

[0024] The front side of the limiting sleeve 8 is provided with a connecting plate 8-1, which is fixed to the push pin cylinder 5 through a shaft hole structure.

[0025] The working principle of this invention is as follows:

[0026] Before the stapler is fired, rotate the adjusting nut so that the indicator needle points to the firing area. During the above adjustment process, the pusher sleeve 5 and the limiting sleeve 8 do not move, and the central shaft 3 moves back and forth within the hoop 7.

[0027] When firing, the operator presses the movable handle, which drives the pusher cylinder 5 to move forward and moves the limiting sleeve 8 forward to the outer periphery of the hoop 7. The gripper 7-1 of the hoop 7 contracts with the slope of the inner surface of the limiting sleeve 8 and is squeezed to grip the central shaft 3. Since the hoop 7 is fixed to the side wall of the gun body 1, it can effectively prevent the central shaft 3 from moving forward.

[0028] The harder the operator presses the movable handle, the tighter the clamp 7 and the central shaft 3 become, and the better they can counteract the forward thrust generated by the cutting blade cutting the pad ring and the forming of the stitching staple.

[0029] After firing, the pusher sleeve 5 retracts, the hoop 7 exits from the limiting sleeve 8, and returns to its initial state. The central shaft 3 can be freely adjusted with the adjusting nut.

[0030] The structural improvements of this invention are also applicable to sutures with the same structure and working principle as the stapler.

Claims

1. An anti-retraction stapler, comprising a gun body (1), a movable handle (2), a central shaft (3), an adjusting nut (4), and a pusher cylinder (5); the central shaft (3) has a pin stop (6) at its front end and a threaded area that mates with the adjusting nut (4) at its rear end; the pusher cylinder (5) is sleeved on the outer circumference of the central shaft (3) and is driven to move back and forth by the movable handle (2), characterized in that: The gun body (1) is provided with a deformable hoop (7) and a limiting sleeve (8) for driving the hoop (7) to retract. The hoop (7) is fixed to the side wall of the gun body (1), and the central shaft (3) slides through the central hole of the hoop (7); the limiting sleeve (8) is located on the rear side of the hoop (7) and is fixedly connected to the push nail cylinder (5) on the front side; the central shaft (3), the hoop (7) and the limiting sleeve (8) are coaxially arranged. The hoop (7) has several ring-shaped claws (7-1) on its rear side. The radius of the central hole of the limiting sleeve (8) gradually decreases from front to back to form a tapered surface for driving the hoop (7) to retract, and the minimum radius of the limiting sleeve (8) is greater than the radius of the central shaft (3); The outer contour of the hoop (7) matches the tapered surface of the hole in the limiting sleeve (8).

Images