An integrated multi-section multi-directional recovery forceps

Abstract

An integrated multi-section multi-directional recovery pliers comprises: a recovery pliers tube body, which is divided into a conveying section and a bending adjustment section, the conveying section is a multi-cavity structure, including a middle opening and closing control wire cavity and traction wire cavities on both sides, and the bending adjustment section is embedded with a traction ring and a limit ring; a pliers head, including a jaw, a pliers head outer tube, a push rod and a clamp ring, the push rod drives the pliers head to open and close and rotate, the clamp ring is located between the traction ring and the limit ring, so that the pliers head is driven to bend when the bending adjustment section bends; a pliers head control handle, which is connected to the pliers head through an opening and closing control wire, one end of the opening and closing control wire is connected to the push rod, and the other end is connected to the pliers head control handle, and the pliers head control handle controls the opening and closing and rotation of the pliers head through the opening and closing control wire; a tube body bending adjustment handle, which is connected to the bending adjustment section through a traction wire, one end of the traction wire is connected to the tube body bending adjustment handle, and the other end is connected to the traction ring, and the tube body bending adjustment handle controls the bending of the bending adjustment section through the traction wire.

Description

Technical Field

[0001] The invention patent relates to the field of medical devices, and in particular to an integrated multi-section multi-directional retrieval forceps. Background Art

[0002] Vascular stenosis is one of the main diseases in blood vessels at present. Vascular stenosis can cause further ischemia of limbs or organs. One of the main causes of vascular stenosis is thrombosis. Clinically, thrombosis in different periods and conditions can be roughly divided into the following treatment methods: drug thrombolysis, physical therapy, open surgery, interventional therapy, and combined surgery; among them, drug thrombolysis and physical therapy have certain limitations and limited patency rates. Open surgery and combined surgery cause the greatest damage to patients' vascular resources, which is not conducive to long-term treatment and health management of patients. Interventional therapy mainly involves removal through balloon catheters and thrombectomy catheters. These methods are easy to remove fresh thrombi, but old thrombi are not easy to remove. At present, the commonly used clinical method for stenosis caused by old thrombi and intimal hyperplasia is balloon dilatation, but after balloon dilatation, the vascular wall will rebound, resulting in a small improvement in the vascular lumen area.

[0003] In response to this clinical problem, in order to solve the stenosis problem caused by old thrombus and intimal hyperplasia, doctors often try to use biopsy forceps to clamp old thrombus in blood vessels to reduce stenosis. However, the biopsy forceps currently on the market only have the function of clamping and cannot be bent. Due to the curvature of blood vessels, the use of existing biopsy forceps often cannot achieve the expected clinical effect. Some existing companies have also begun to study adjustable biopsy forceps, and biopsy forceps that can be adjusted left and right for grasping. However, the opening direction and bending direction of the jaws of this adjustable biopsy forceps are fixed. When the shape of the foreign body changes, it is not easy to grasp.

[0004] At the same time, in the clinic, open surgery and interventional surgery are usually used to remove foreign bodies in blood vessels, such as guide wires that fall off during surgery, broken stents, and placed filter stents. Open surgery is used to remove foreign bodies, which is more harmful to patients. Interventional surgery usually uses a snare to remove foreign bodies. The snare is in the shape of a ring. When removing it, the ring needs to be wrapped around the foreign body before it can be removed. However, it is sometimes difficult to accurately remove foreign bodies in clinical practice, resulting in the inability to effectively remove foreign bodies. Therefore, it is easier to remove foreign bodies with adjustable biopsy forceps. However, due to the different states of foreign bodies in blood vessels, the biopsy forceps can be adjusted to the vicinity of the foreign body by only adjusting the bend of the tube body during grasping, so that it can contact the foreign body for easy grasping. However, at this time, the state of the jaws and the foreign body may not match, and it is still difficult to grasp. It is necessary to adjust the clamp head on the basis of ensuring the adjustable bend of the tube body so that the jaws can better grasp the foreign body.

[0005] To this end, we propose an integrated multi-section multi-directional retrieval forceps. Summary of the invention

[0006] The purpose of the present invention is to overcome the above disadvantages and provide an integrated multi-section multi-directional recovery forceps.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An integrated multi-section multi-directional recovery forceps, characterized by comprising:

[0009] The recovery clamp tube body is divided into a conveying section and a bending section. The conveying section is a multi-cavity structure, including a middle opening and closing control wire cavity and two side traction wire cavities. The bending section is embedded with a traction ring and a limit ring, and the bending angle is 0°-90°.

[0010] A pliers head, comprising a jaw, a pliers head outer tube, a push rod and a clamp ring, wherein the push rod is connected to the jaw, and the push rod drives the pliers head to open and close and rotate, the opening and closing angle is 0°-120°, and the rotation angle is 0°-90°, the pliers head outer tube is connected to the jaw, and the clamp ring is connected to the pliers head outer tube, and the clamp ring is located between the traction ring and the limit ring, so that the pliers head is driven to bend when the bending adjustment section is bent;

[0011] A clamp head control handle, wherein the clamp head control handle is connected to the clamp head through an opening and closing control wire, one end of the opening and closing control wire is connected to the push rod, and the other end is connected to the clamp head control handle, and the clamp head control handle controls the opening, closing and rotation of the clamp head through the opening and closing control wire;

[0012] A tube bending handle, wherein the tube bending handle is connected to the bending section via a traction wire, one end of the traction wire is connected to the tube bending handle, and the other end is connected to the traction ring, and the tube bending handle controls the bending of the bending section via the traction wire.

[0013] Preferably, it further comprises a handle, and the pliers head control handle and the tube body bending handle are arranged on the handle.

[0014] Preferably, a hollow groove is provided on the handle, and the pliers head control handle performs forward and backward and rotational movements in the hollow groove.

[0015] Preferably, a hollow structure is provided on the handle to limit the rotation angle of the pliers head control handle.

[0016] Preferably, a plurality of protrusions are provided on the surfaces of the limiting ring and the traction ring on one side in contact with the clamping ring to reduce mutual friction.

[0017] Preferably, a horizontal bar is provided on the pliers head control handle, and the opening and closing control wire is provided on the horizontal bar.

[0018] Preferably, the tube bending handle also includes a torsion portion, a first mounting block, a second mounting block and a screw rod, the first mounting block and the second mounting block are mounted on the screw rod, the torsion portion is connected to the screw rod, and the traction wire is arranged on the first mounting block and the second mounting block.

[0019] Preferably, the opening and closing control wire is a segmented structure, divided into a conveying segment and a bending segment.

[0020] Preferably, the curved section comprises an inner core shaft and a snake-bone tube, the snake-bone tube is sleeved on the inner core shaft, and the diameter of the inner core shaft is smaller than the diameter of the conveying section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 An integrated multi-section multi-directional retrieval forceps, namely the present invention;

[0022] Figure 2 Pliers head;

[0023] Figure 3 Adjustable bend section;

[0024] Figure 4 An integrated multi-section, multi-directional recovery clamp head end;

[0025] Figure 5 Conveying section;

[0026] Figure 6 Clamp head control handle;

[0027] Figure 7 Pipe body bending handle;

[0028] Figure 8 Opening and closing control wire;

[0029] Fig. 9 The present invention captures foreign matter process. DETAILED DESCRIPTION

[0030] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] An integrated multi-section multi-directional recovery pliers, characterized in that it comprises: a pliers head 100, wherein the pliers head comprises a jaw 110, a pliers head outer tube 120, a push rod 130, and a clamp ring 140 on the pliers head outer tube, such as Figure 1 As shown, the jaw 110 includes an upper and lower halves with a toothed opening. When opened, the opening angle is 0°-120°. The jaw head outer tube 120 and the jaw 110 are fixedly connected together. A clamp ring 140 is welded at the end of the jaw head outer tube 120. The clamp ring is an incomplete circular ring with multiple protrusions, the number of which is 1-4. The cross-sectional view of the clamp ring 140 is as shown in Figure 2 , its size matches the traction ring 214 at the front end of the tube body, the push rod 130 is connected and combined with the jaws 110, and the push rod 130 is assembled and placed inside the outer tube 120 of the clamp head. When the push rod 130 is pushed forward, the jaws open, and when the push rod 130 is stretched backward, the jaws close. The push rod 130 is a hollow structure, and the push rod 130 is connected to the opening and closing control wire 150. When the opening and closing control wire 150 is controlled, the push rod 130 performs corresponding actions.

[0032] The recovery clamp tube body 200 includes an adjustable bend section 210 and a conveying section 220. The adjustable bend section 210 includes a flexible polymer material 211, and includes a limit ring 213 and a traction ring 214 inside. The limit ring 213 and the traction ring 214 are connected by a connecting rod 215. The connecting rod 215 is composed of multiple stainless steel wires. The gap width between the limit ring 213 and the traction ring 214 matches the width of the clamp head outer tube, which can meet the smooth rotation of the clamp ring 140. The limit ring 213 has multiple notches to facilitate the installation and insertion of the clamp head outer tube. Figure 3 As shown, the size and number of the notches match the size of the snap ring. The limiting ring 213 is mainly used to limit the jaws 110 from extending forward when the jaws 110 are pushed forward to open, so as to prevent the jaws from being separated from the tube body 200. The traction ring 214 is symmetrically connected to the proximal end with traction lines 216 and 217 for bending adjustment. The surfaces where the limiting ring 213 and the traction ring 214 contact the snap ring 140 are respectively formed with multiple protrusions, which reduces the contact area between the limiting ring 213 and the traction ring 214 and the snap ring 140, thereby reducing the force required to twist the pliers head. Figure 4 .

[0033] In another embodiment, the limit ring 213 and the traction ring 214 are connected by a polymer tube to increase the flexibility of this section of the tube body. At the same time, after the clamp ring 140 is embedded, the friction between the clamp ring and the polymer material is low, which reduces the torque control force required for the rotation of the clamp head. The selected connecting polymer material has a higher temperature resistance than the outer layer material of the tube body, which prevents the outer polymer material from penetrating into the middle of the clamping groove in the subsequent process, affecting the subsequent assembly and use of the limit ring 213. The limit ring 213 is a closed loop to prevent the clamp head from being separated from the limit ring when the clamp head is rotated by torque control. The limit ring 213 is divided into upper and lower halves. When installing, the upper and lower halves of the limit ring are separated, the clamp ring is embedded, and then the upper and lower limit rings are connected.

[0034] In another embodiment, the limiting ring 213 and the pulling ring 214 are integrally formed and covered with a closed tube, which reduces the subsequent connection process of the two components and also prevents the outer polymer material 213 from penetrating into the middle of the card slot when melted, affecting the subsequent assembly and use of the limiting ring 213.

[0035] The delivery section 220 is a multi-lumen braided tube, the outer layer of which is a polymer material, the middle layer is a braided layer, and the inner layer is a PTFE liner. In the multi-lumen pipeline structure, the middle cavity 221 is the channel for the opening and closing control wire 140, and the cavities 222 and 223 on both sides are the channels for the traction lines 216 and 217 respectively. The opening and closing control wire 140 and the traction lines 216 and 217 extend out of the recovery clamp tube body 200 to be connected and fixed on the handle 300.

[0036] In another embodiment, the conveying section 220 is a non-woven tube body, which is a two-layer polymer extruded tube inner and outer combination 224, 225, wherein the outer single-lumen tube 224 is a single-lumen polymer tube, the inner special-shaped single-lumen tube 225 is a special-shaped polymer tube, the middle cavity 226 is a through opening and closing control wire 150, and the outer wall of the inner tube 225 and the left and right inner walls of the outer tube 224 form two traction wire cavities 227 and 228. In order to improve the twist control ability, bonding is performed between the inner and outer layers of the tube body to improve its twist control performance. This structure avoids the braided tube body and saves costs. The bending section 210 includes an inner and outer layer, the inner layer structure is a snake tube, the snake tube is a bidirectional adjustable bend, the proximal end of the snake tube is connected to the tube body 220, and the distal end of the snake tube is connected to an integrated limit ring 213 and a traction ring 214. The outer layer is a polymer tube, which is used to cover the snake bone tube to reduce its bending and dislocation and fall off effects, while increasing its connection strength, forming a smooth protective layer on the tube body and reducing damage to the blood vessel wall.

[0037] The handle 300 comprises a pliers head control handle 310, a grip 320, and a tube bending handle 330. The pliers head control handle 310 comprises a shell 311 and at least one horizontal bar 312, the horizontal bar is connected to the opening and closing control wire 140, the pliers head control handle 300 is covered on the outer surface of the grip 320, the grip 320 of the pliers head control handle 310 section is partially hollowed out 313, and the hollowing amount is at least 1 / 2 of the area of ​​the cylindrical tube body, the horizontal bar of the pliers head control handle 310 passes through the hollow part of the grip 320, and drives the opening and closing control wire 140 to rotate together by rotating a certain angle, and the rotation angle is 0°-90°, and the grip 320 of the pliers head control handle 310 section has a hollowed out groove 321 along the axial direction, which is used for the handle 310 to move forward and backward and rotate, such as Figure 6 The tube bending handle 330 includes a torsion portion 331, a first mounting block 332, a second mounting block 333 and a screw rod 334. The first and second mounting blocks are mounted on the screw rod, and the torsion portion 331 can drive the screw rod 334 to rotate. The screw rod 334, the first mounting block 332 and the second mounting block 333 are located on the slide groove in the handle 320. The first mounting block 332 and the second mounting block 333 are driven to move forward and backward by rotating the screw rod 334. The two mounting blocks are connected with traction wires 216 and 217, so that the two mounting blocks 332 and 333 drive the pliers head 100 to twist when they move.

[0038] The hollow structure 313 under the clamp head control handle 310 has a slot angle that matches the opening angle of the limit ring 213 to prevent the clamp ring 140 from moving out of the limit ring 213 when the clamp head control handle 310 is pushed.

[0039] The control wire 150 for opening and closing is a segmented structure, which is divided into a conveying section 152 and a bending section 151, wherein the bending section 151 is divided into two layers, an outer multi-directional snake-bone tube 153 and an inner core shaft 154. The snake-bone tube can be bent in multiple directions. The more bending surfaces it has, the greater its flexibility, and the greater the risk of breakage. The inner layer of the snake-bone tube is lined with a core shaft with a reduced diameter to reduce the risk of breakage of the snake-bone tube. The design of the outer snake-bone tube and the inner solid core shaft ensures that the bending section has both good bending flexibility and good torsional control and tensile strength. The conveying section 152 is a solid structure, which ensures sufficient torsional and tensile strength of the opening and closing control wire.

[0040] In another embodiment, the outer layer of the bending section 151 of the opening and closing control wire 150 is a tight spring tube, which increases the flexibility of the bending section 151. To increase its torsion control, it can be welded on the spring tube at a certain distance and fixed to the inner core shaft, which not only ensures flexibility but also increases the torsion control performance of the spring tube.

[0041] In another embodiment, the outer layer of the bending section 151 of the opening and closing control wire 150 is a tightly braided tube, which increases the flexibility of the bending section 151. In order to increase its torsion control performance, the braided tube is welded at a certain distance and fixed to the inner core shaft, which ensures flexibility and increases torsion control performance.

[0042] Fig. 9 During the use of the present invention, after an integrated multi-section multi-directional retrieval forceps is delivered to the expected position in the blood vessel 500, the forceps head control handle 310 and the tube body bending handle 330 are adjusted to control the opening, bending and twisting of the forceps head so that the jaws 110 are aligned with the object to be grasped 400, and then the forceps head control handle 310 is adjusted to close the forceps head to grasp the object to be grasped 400, and finally the present invention and the object to be grasped are withdrawn from the blood vessel together.

[0043] The described embodiments are to be considered in all respects as illustrative only and not restrictive. Therefore, the scope of the present disclosure is indicated by the appended claims rather than by the preceding description. All changes within the equivalent meaning and scope of the claims are included within their scope. The present invention is not limited to the above-described embodiments, which does not mean that the present invention must rely on the above-described embodiments to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent replacement of the raw materials selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the scope of protection and disclosure of the present invention.

Claims

1. An integrated multi-section multi-directional recovery forceps, characterized in that: include: The recovery clamp tube body is divided into a conveying section and a bending section. The conveying section is a multi-cavity structure, including a middle opening and closing control wire cavity and two side traction wire cavities. The bending section is embedded with a traction ring and a limit ring, and the bending angle is 0°-90°. A pliers head, comprising a jaw, a pliers head outer tube, a push rod and a clamp ring, wherein the push rod is connected to the jaw, and the push rod drives the pliers head to open and close and rotate, the opening and closing angle is 0°-120°, and the rotation angle is 0°-90°, the pliers head outer tube is connected to the jaw, and the clamp ring is connected to the pliers head outer tube, and the clamp ring is located between the traction ring and the limiting ring, so that the pliers head is driven to bend when the bending adjustment section is bent, and a plurality of protrusions are arranged on the side surfaces of the limiting ring and the traction ring that are in contact with the clamp ring to reduce the mutual friction; A clamp head control handle, wherein the clamp head control handle is connected to the clamp head through an opening and closing control wire, one end of the opening and closing control wire is connected to the push rod, and the other end is connected to the clamp head control handle, and the clamp head control handle controls the opening, closing and rotation of the clamp head through the opening and closing control wire, and the opening and closing control wire is a segmented structure, which is divided into a conveying section and a bending section, and the bending section includes an inner core shaft and a snake bone tube, and the snake bone tube is sleeved on the inner core shaft, and the diameter of the inner core shaft is smaller than the diameter of the conveying section; A tube bending handle, wherein the tube bending handle is connected to the bending section via a traction wire, one end of the traction wire is connected to the tube bending handle, and the other end is connected to the traction ring, and the tube bending handle controls the bending of the bending section via the traction wire, and the tube bending handle further comprises a torsion portion, a first mounting block, a second mounting block and a screw rod, wherein the first mounting block and the second mounting block are mounted on the screw rod, the torsion portion is connected to the screw rod, and the traction wire is arranged on the first mounting block and the second mounting block; The handle includes the pliers head control handle and the tube body bending handle, the handle is provided with a hollow groove, the pliers head control handle performs forward and backward and rotational movements in the hollow groove, and the handle is also provided with a hollow structure to limit the rotation angle of the pliers head control handle.

2. The one-piece multi-section multi-directional recovery forceps according to claim 1, characterized in that: A horizontal bar is arranged on the clamp head control handle, and the opening and closing control wire is arranged on the horizontal bar.

3. The one-piece multi-section multi-directional recovery forceps according to claim 1, characterized in that: The bending section comprises an inner core shaft and a spring tube, and the spring tube is sleeved on the inner core shaft.

4. The integrated multi-section multi-directional recovery forceps according to claim 1, characterized in that: The bending section comprises an inner core shaft and a braided tube, and the braided tube is sleeved on the inner core shaft.

5. The one-piece multi-section multi-directional recovery forceps according to claim 1, characterized in that: The delivery section is an integrally formed three-lumen tube.

6. The one-piece multi-section multi-directional recovery forceps according to claim 1, characterized in that: The delivery section comprises an outer single-lumen tube and an inner special-shaped single-lumen tube, and the inner wall of the outer single-lumen tube and the outer wall of the inner special-shaped single-lumen tube form two cavities.

7. The integrated multi-section multi-directional recovery forceps according to claim 6, characterized in that: The outer layer single-lumen tube and the inner layer special-shaped single-lumen tube are connected together by bonding.

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