Drag hook thread trimming device

Abstract

The utility model relates to a wire cutting device with a drag hook. The wire cutting device comprises the drag hook, a traction steel wire assembly, a push-pull rod and scissors, the near end of the drag hook is connected with a traction steel wire assembly, the near end of the traction steel wire assembly is connected with a push-pull rod, and the push-pull rod is mounted on a tubular shell and can move back and forth along the shell; a sliding nail is arranged on the drag hook; the scissors are hinged and fixed in the shell, an arc-shaped sliding groove is formed in a handle of the scissors, and the sliding nail is embedded into the arc-shaped sliding groove; the push-pull rod axially moves to drive the drag hook and the sliding nail to axially move together, and the sliding nail slides along the arc-shaped sliding groove to force the scissors to be closed or opened. According to the utility model, a long coil can be remained at the tail part of the nylon rope loop after cutting and folding, so that the risk of dragging a wound surface is avoided.

Description

Technical Field

[0001] This utility model relates to a hook-and-cut-thread device, belonging to the field of medical device technology. Background Technology

[0002] To suture extremely large wounds, a tissue clamping device combined with nylon cord loops was used for purse-string sutures. First, a loop of nylon cord was placed. Then, the nylon cord was densely staked along the perimeter of the wound, requiring multiple metal clamps to hold it in the required positions on the tissue. Since the metal clamps simultaneously hold the nylon cord loops and the wound tissue, all metal clamps, along with the nylon cord loops and the wound tissue, were pulled together when the nylon cord loops were finally tightened.

[0003] The tissue clamping device and nylon rope coil remain in the body for an extended period until the wound heals and falls off. Because a long tail thread remains at the end of the nylon rope coil after it is closed, forming a closed loop, this loop becomes a stress-bearing area, easily pulled by gastrointestinal peristalsis, food, and excrement. This could negatively impact wound healing. However, current technology does not address this loop coil, thus posing a certain risk. Summary of the Invention

[0004] The purpose of this invention is to provide a hook-and-cutting device that can gather (straighten) the long coil remaining at the end of a nylon rope loop and cut it at the same time, avoiding the risk of pulling on the wound. Moreover, the gathering and cutting actions can be completed in one go.

[0005] The present invention adopts the following technical solution:

[0006] A hook-and-wire-cutting device includes a hook 120, a traction wire assembly 220, a push-pull rod 320, and scissors 130. The proximal end of the hook 120 is connected to the traction wire assembly 220, and the proximal end of the traction wire assembly 220 is connected to the push-pull rod 320. The push-pull rod 320 is mounted on a tubular housing and can move back and forth along the housing. A sliding pin 122 is provided on the hook 120. The scissors 130 is hinged and fixed inside the housing. An arc-shaped groove 133-1 is provided on the handle 133 of the scissors 130, and the sliding pin 122 is embedded in the arc-shaped groove 133-1. The axial movement of the push-pull rod 320 causes the hook 120 and the sliding pin 122 to move axially together. The sliding pin 122 slides along the arc-shaped groove 133-1, forcing the scissors to close or open.

[0007] Preferably, the hook wire cutting device is divided into a processing section 100, a pushing section 200, and an operating section 300 along the axial direction; the housing located in the processing section 100 is a front cover 110; a trapezoidal second front window b is provided near the front cover, allowing the front part of the scissors to extend outward through the second window b; a side window c is provided along the axial direction on the side of the front cover body 112, allowing the rear part of the scissors to extend outward through the side window c; a rivet hole d is provided near the front cover body 112 for hinged connection with the scissors 130.

[0008] Preferably, the distal section of the front cover 100 is a semi-sloping surface 111 parallel to the blade surface of the scissors, and a first front window a is provided at the lower side of the semi-sloping surface 111 to allow the hook to enter and exit through the first front window a.

[0009] Preferably, the front end of the hook 120 is provided with a short hook 121, and the middle part is provided with the sliding pin 122.

[0010] Furthermore, the scissors 130 are provided with a blade 131, a handle 132, and a blade 133; the blade 133 surface is connected to the sliding pin 122 by an arc-shaped groove 133-1, allowing the sliding pin 122 to slide within the arc-shaped groove 133-1; a central hole 133-2 is provided in the middle of the inner side of the blade 133-2, and a rivet 140 passes through the central hole 133-2 to connect and fix it to the rivet hole d of the front cover.

[0011] Furthermore, the pushing part 200 includes an outer sheath tube 210 and a traction wire assembly 220. The outer sheath tube 210 is provided with an inner cavity, and the traction wire assembly 220 can slide through the inner cavity of the outer sheath tube 210.

[0012] Furthermore, the distal port of the outer sheath 210 is connected and fixed to the proximal port of the front cover 110, and the distal port of the traction wire 220 is welded and fixed to the proximal port of the hook 120, thereby connecting the pushing component 200 with the disposal component 100.

[0013] Furthermore, the operating part 300 includes a base 310, a push-pull rod 320, and a retaining ring 330; the push-pull rod 320 can slide along the axial direction of the base 310; the retaining ring 140 is disposed on the proximal side of the base 120.

[0014] Furthermore, the outer sheath 210 is connected to the inner cavity of the base 310; the traction wire 220 passes through the inner cavity of the base 310; the push-pull rod 320 is connected and fixed to the proximal end of the traction wire 220, causing the push-pull rod to slide through the traction wire of the pushing part to drive the extension and retraction of the hook of the disposal component, while the hook drives the opening and closing of the scissors.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1) The long coils remaining at the end of the nylon rope loop after it has been closed can be trimmed to avoid the risk of pulling on the wound.

[0017] 2) The hook and scissors are linked by rivets, arc-shaped grooves and other structures to achieve the dual action of coil tensioning and shearing under a push-pull action;

[0018] 3) The structure of the processing unit was designed so that the shears only need one blade, which works in conjunction with the structure of the head of the processing unit to achieve the cutting action, while ensuring that there is no interference between the tube wall of the processing unit and the shears. Attached Figure Description

[0019] Figure 1 This is a schematic cross-sectional view of the hook-and-cut-line device of this utility model.

[0020] Figure 2 This is an exploded view of the processing section of the hook-and-cut-line device of this utility model.

[0021] Figure 3 This is a three-dimensional view of the head of the processing unit of this utility model.

[0022] Figure 4 This is a schematic diagram showing the positional relationship between the hook and the scissors, where (a) represents position one and (b) represents position two.

[0023] Figure 5 This is a schematic diagram of purse-string suture surgery in the existing technology.

[0024] In the diagram, 100 is the processing unit, 200 is the pushing unit, and 300 is the operating unit; 210 is the outer sheath tube, 220 is the traction steel wire assembly, 310 is the base, 320 is the push-pull rod, and 330 is the fixing ring;

[0025] 131. Blade, 132. Handle, 133. Knife handle, 133-1. Arc-shaped groove, 133-2. Center hole, 130. Scissors, 120. Hook, 122. Sliding rivet, 110. Front cover, 121. Short hook, 140. Rivet, a. First front window, b. Second front window, c. Side window, d. Rivet hole;

[0026] 111. Semi-sloping surface, 112. Cover body, 110. Front cover. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0028] See Figure 1 This utility model provides a hook-and-cut-line device, including a processing unit 100, a pushing unit 200, and an operating unit 300.

[0029] Combination Figure 2The treatment unit is equipped with a front cover 110, a hook 120, scissors 130 and rivets 140.

[0030] Combination Figure 3 The distal section of the front cover 100 is a semi-sloping surface 111 parallel to the blade surface of the scissors. A first front window a is provided at the lower edge of the semi-sloping surface, allowing the hook to enter and exit through the first front window a. A trapezoidal second front window b is provided at the proximal end of the front cover, allowing the front part of the scissors to extend out through the second window b.

[0031] See Figure 2 A side window c is provided along the axis on the side of the front cover body 112, and a rivet hole d is provided at the near end of the front cover body 112. The hook 120 is provided with a short hook 121 and a sliding pin 122.

[0032] See also Figure 2 The scissors 130 are provided with a blade 131, a handle 132, and a shank 133; the shank 133 surface is connected to the sliding pin 122 by an arc-shaped groove 133-1, allowing the sliding pin 122 to slide within the arc-shaped groove 133-1; there is a central hole 133-2 in the middle of the inner side of the shank surface, and a rivet 140 passes through the central hole 133-2 to connect and fix it to the rivet hole d of the front cover.

[0033] See Figure 1 The pushing component 200 includes an outer sheath 210 and a traction wire assembly 220. The outer sheath 210 has an inner cavity, and the traction wire assembly 220 can slide through the inner cavity of the outer sheath 210. The distal end of the outer sheath 210 is connected and fixed to the proximal end of the front cover 110, and the distal end of the traction wire 220 is welded and fixed to the proximal end of the hook 120, thereby connecting the pushing component 200 to the disposal component 100.

[0034] The operating component 300 includes a base 310, a push-pull rod 320, and a retaining ring 330. The push-pull rod 320 can slide axially along the base 310; the retaining ring 140 is located on the proximal side of the base 120. The outer sheath 210 is connected to the inner cavity of the base 310; the traction wire 220 can pass through the inner cavity of the base 310; the push-pull rod 320 is fixedly connected to the proximal end of the traction wire 220. The push-pull rod sliding through the traction wire of the pushing part actuates the extension and retraction of the hook of the disposal component, while the hook simultaneously drives the opening and closing of the scissors.

[0035] The hook 120 can slide in the front end of the outer sheath tube, and simultaneously slides in the arc-shaped groove via the sliding pin 122, causing the handle of the scissors 130 to swing around the central hole, thereby causing the blade of the scissors 130 to open and close relative to the front cover. When the hook 120 is fully extended outside the front cover, the scissors open to their maximum extent; when the hook 120 is fully retracted into the front cover, the scissors close to the semi-sloping front of the front cover.

[0036] The short hook of the pull hook 120 can hook the long coil at the end of the nylon rope to fix its position and keep the coil under the blade; the blade is perpendicular to the long coil to effectively cut the long coil.

[0037] Figure 5 This is a schematic diagram of a purse-string suture procedure in the prior art, and not a schematic diagram of the operation of the hook and thread-cutting device of this utility model. The attached drawing is only to show the tissue clamping device located in the stomach and a long tail nylon rope coil. This nylon rope coil is the specific object that needs to be straightened before being cut by this hook and thread-cutting device.

[0038] As the hook extends or retracts, the scissors open or close. In some preferred embodiments, a structure of a sliding pin and an arc-shaped groove is used, in which the sliding pin, which moves in a straight line, drives the arc-shaped groove to rotate around the center of the arc.

[0039] The blade is used for cutting. In some preferred embodiments, the blade surface is bent at an angle to the handle, so that the blade direction is intersected with the long coil, thus effectively cutting the long coil.

[0040] The operator holds the operating part of the hook suture cutting device with one hand, with the thumb placed in the fixed ring and the index and middle fingers placed in the rings at both ends of the push-pull rod. Pushing or pulling the push-pull rod controls the hook of the treatment part to extend or retract, while the scissors open or close at the same time.

[0041] Pushing the push-pull lever extends the hook of the treatment unit, simultaneously opening the scissors and hooking the long coil of the nylon rope into the short hook. Pulling the push-pull lever retracts the hook of the treatment unit, closing it so that the long coil is within the cutting range of the scissors blade. The operator continues to pull the push-pull lever back until the hook is fully retracted into the front cover, the long coil passes through the first front window and is closed, and the scissors close to the semi-sloping front cover, causing the blade to press against the long coil until it is cut.

[0042] This invention can trim the long coil residue at the end of the nylon rope loop after it has been folded, avoiding the risk of pulling on the wound. The hook and scissors are linked by rivets, arc-shaped grooves and other structures to achieve a dual action of coil tensioning and shearing under a single push-pull motion. The structure of the processing part has been designed so that the scissors only need one blade, which works in conjunction with the structure of the head of the processing part to achieve the shearing action, while ensuring that there is no interference between the tube wall of the processing part and the scissors.

[0043] As used herein, the singular forms “a,” “an,” and “the” include plural objects, and the term “several” is generally used in the indefinite number including “two or more.” The terms “installed,” “connected,” and “joined” should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral part.

[0044] The terms "proximal," "distal," and "head" used in this document are based on the relative orientation and position of the various components and elements of the medical device. Although not restrictive, "proximal" generally refers to the end of the medical device closest to the surgeon during normal use, while "distal" and "head" generally refer to the end of the medical device furthest from the surgeon. The terms "axial" refer to the direction along the longitudinal axis of the hook suture cutter, "circumferential" refers to the circumferential direction around the longitudinal axis of the hook suture cutter, "radial" refers to the direction perpendicular to the longitudinal axis of the hook suture cutter, and "cross-section" refers to a cross-section perpendicular to the longitudinal axis.

[0045] The above are preferred embodiments of the present utility model. Those skilled in the art can make their own modifications or improvements based on this, and such modifications or improvements are all within the scope of protection claimed by the present utility model without departing from the overall concept of the present utility model.

Claims

1. A hook-and-thread-cutting device, characterized in that: Includes a hook (120), a traction wire assembly (220), a push-pull rod (320), and scissors (130); The proximal end of the hook (120) is connected to the traction wire assembly (220), and the proximal end of the traction wire assembly (220) is connected to the push-pull rod (320). The push-pull rod (320) is mounted on the tubular housing and can move back and forth along the housing. A sliding pin (122) is provided on the hook (120). The scissors (130) are hinged and fixed inside the housing. The handle (133) of the scissors (130) is provided with an arc-shaped groove (133-1), and the sliding pin (122) is embedded in the arc-shaped groove (133-1). The axial movement of the push-pull rod (320) causes the hook (120) and the slide pin (122) to move axially together. The slide pin (122) slides along the arc-shaped groove (133-1) to force the scissors to close or open.

2. The hook-and-thread-cutting device as described in claim 1, characterized in that: The hook wire cutting device is divided into a processing section (100), a pushing section (200), and an operating section (300) along the axial direction. The housing located in the processing unit (100) is a front cover (110); A trapezoidal second front window (b) is provided near the front end of the front cover, allowing the front part of the scissors to extend outward through the second front window (b); A side window (c) is provided along the axis on the side of the front cover body (112), allowing the rear part of the scissors to extend outward through the side window (c); There is a rivet hole (d) at the near end of the front cover that runs through the cover body (112) for hinged to the scissors (130).

3. The hook-and-thread-cutting device as described in claim 2, characterized in that: The distal section of the front cover (110) is a semi-sloping surface (111) parallel to the blade surface of the scissors. A first front window (a) is provided on the lower side of the semi-sloping surface (111) to allow the hook to enter and exit through the first front window (a).

4. The hook-and-thread-cutting device as described in claim 1, characterized in that: The front end of the hook (120) is provided with a short hook (121), and the middle part is provided with the sliding pin (122).

5. The hook-and-thread-cutting device as described in claim 2, characterized in that: The scissors (130) are provided with a blade (131), a handle (132), and a shank (133); the shank (133) surface is connected to the sliding pin (122) by an arc-shaped groove (133-1), allowing the sliding pin (122) to slide within the arc-shaped groove (133-1); there is a central hole (133-2) in the middle of the inner side of the shank surface, through which a rivet (140) passes to connect and fix to the rivet hole (d) of the front cover.

6. The hook-and-thread-cutting device as described in claim 2, characterized in that: The pushing part (200) includes an outer sheath (210) and a traction wire assembly (220). The outer sheath (210) is provided with an inner cavity, and the traction wire assembly (220) can slide through the inner cavity of the outer sheath (210).

7. The hook-and-thread-cutting device as described in claim 6, characterized in that: The distal port of the outer sheath (210) is connected and fixed to the proximal port of the front cover (110), and the distal port of the traction wire assembly (220) is welded and fixed to the proximal port of the hook (120), thereby connecting the pushing part (200) with the processing part (100).

8. The hook-and-thread-cutting device as described in claim 6, characterized in that: The operating part (300) includes a base (310), a push-pull rod (320) and a retaining ring (330); the push-pull rod (320) can slide along the axial direction of the base (310); the retaining ring (330) is disposed on the proximal side of the base (310).

9. The hook-and-thread-cutting device as described in claim 8, characterized in that: The outer sheath tube (210) is connected to the inner cavity of the base (310); the traction wire assembly (220) passes through the inner cavity of the base (310); the push-pull rod (320) is connected and fixed to the proximal end of the traction wire assembly (220), causing the push-pull rod to slide through the traction wire of the pushing part to drive the extension and retraction of the hook of the disposal component, and at the same time the hook drives the opening and closing of the scissors.

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