Bending-adjustable intracavitary capturing device with multi-ring structure

Abstract

The invention discloses a bending-adjustable intracavitary capture device with a multi-ring structure, and relates to the field of medical equipment.The bending-adjustable intracavitary capture device comprises a guide wire, a ring hanging part is arranged at the front end of the guide wire, the guide wire is sleeved with a guide pipe, the upper end of the guide pipe is sleeved with an external sleeve, a bearing pipe is arranged on one side of the external sleeve, and the bearing pipe is connected with the guide wire; the bending-adjustable intracavitary capture device with the multi-ring structure comprises a guide pipe, the outer portion of the guide pipe is sleeved with an external pipe, a bending driving part is arranged at the upper end of the connecting position of the guide pipe and the external pipe, and the bending degree of the guide pipe towards one side can be adjusted after the bending driving part is dragged towards the side by dragging force. When the guide wire is rotated, the front end of the hanging ring part quickly hooks a target object, multiple rings are folded towards the center of a circle cooperatively, and compared with a single-ring structure, the operation process is remarkably simplified, the capturing efficiency is improved, and the operation time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to an intracavitary arrester with an adjustable multi-loop structure and bendable tip. Background Art

[0002] An intracavitary arrester is a tool used in the medical field to grasp devices such as vena cava filters during some surgeries. A vena cava filter is a device placed in the vena cava to prevent diseases such as pulmonary embolism. In actual surgical operations, when using an intracavitary arrester to grasp a vena cava filter, there is generally a problem that the filter hook is prone to detachment from the arrester during the grasping process. This results in medical staff often having to operate on the filter hook multiple times, not only prolonging the surgical time but also increasing the risk of harm to the patient's vein.

[0003] The published patent number CN113662704B has a limit mechanism inside the connecting tube of the vena cava filter arrester to limit the position of the limit block. After the snare catches the hook of the vena cava filter, by pulling the connecting rod of the snare, the limit block is driven to engage with the limit mechanism, so that the snare can lock the hook of the vena cava filter at the bottom end of the connecting tube. In this way, it avoids the situation that the hook of the vena cava filter and the snare are detached due to loosening during the pulling by medical staff, reduces secondary operations, shortens the surgical time, reduces the harm to the patient's vein, simplifies the operation of medical staff, and reduces the surgical difficulty.

[0004] However, when its snare structure catches the hook of the vena cava filter, there is still a problem that the operation is not simple enough. The single-snare catching method it adopts has poor accuracy in actual operation, and medical staff need to spend more energy to adjust the position to accurately catch the filter hook. Compared with the coordinated operation of the multi-loop structure, it is insufficient in quickly and accurately catching the filter hook, and cannot efficiently achieve the rapid connection between the hook and the snare, affecting the further improvement of the overall surgical efficiency.

[0005] Therefore, in view of the existing deficiencies, research and improvement are carried out, and an intracavitary arrester with an adjustable multi-loop structure and bendable tip is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide an intracavitary arrester with an adjustable multi-loop structure and bendable tip to solve the problems mentioned in the above background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: An intracavitary arrester with an adjustable multi-loop structure and bendable tip, comprising: a guide wire, and a hanging loop portion is provided at the front end of the guide wire;

[0008] A catheter is sleeved outside the guide wire, an external sleeve is sleeved on the upper end of the catheter, a receiving tube is provided on one side of the external sleeve, and an external tube is sleeved outside the catheter;

[0009] An upper end of the connection between the catheter and the external tube is provided with a bending driving part, and after the bending driving part is pulled to one side by a pulling force, the bending degree of the catheter to that side can be adjusted.

[0010] An upper end of the connection between the guide wire and the catheter is provided with a clamping part, and the clamping part can prevent the guide wire from moving along the horizontal axis when the guide wire and the catheter move synchronously.

[0011] An end of the catheter close to the ferrule is provided with an air resistance part, and the air resistance part can contract towards the inner side of the catheter by amplifying its own structure.

[0012] Further, the hanging loop part is formed by a plurality of circles with similar sizes intersecting and surrounding each other. Centered on a point in space, they are cross - distributed at a certain angle to each other and form an approximately spherical shape in three - dimensional space. The hanging loop part and the guide wire are integrally arranged.

[0013] Further, there is no obvious overlap between the circles in the hanging loop part. Through interpenetrating combination, they jointly construct a symmetric outer shape structure, and are connected to one end of the guide wire at the overlapping part.

[0014] Further, the bending driving part is composed of a pulling part and an end - point fixing part, and the length of the pulling part is greater than the length of the catheter.

[0015] Further, the end - point fixing part can be composed of two arc parts with the same shape. The installation points of the two arc parts are respectively located at the bottom end inside the catheter and the upper end outside the catheter.

[0016] Further, holes are formed inside the end - point fixing parts, and the diameter of the holes is greater than the diameter of the pulling part.

[0017] Further, the pulling part and the end - point fixing part are vertically and penetratingly connected.

[0018] Further, the clamping part is composed of a first telescopic part and an air inlet part. The first telescopic part is arranged at the upper end of the gap between the guide wire and the catheter, and the air inlet part is connected to the first telescopic part.

[0019] Further, the outside of the first telescopic part is adhesively connected to the catheter, and a micro - check valve is arranged between the first telescopic part and the air inlet part.

[0020] Further, the air resistance part is composed of a second telescopic part and a conveying part. The second telescopic part is arranged at an end of the catheter far from the clamping part, and the second telescopic part is connected to the conveying part. The conveying part is communicated with the first telescopic part arranged inside the clamping part, and a micro - check valve is arranged between the conveying part and the first telescopic part.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The present invention adopts an integrated design of cross-arranged loops in the hanging loop part. When the guide wire is rotated, the front end of the hanging loop part quickly hooks the target object, and multiple loops are coordinated to converge toward the center of the circle. Compared with the single-loop structure, the operation process is significantly simplified, the capture efficiency is improved, and the operation time is reduced;

[0023] 2. The present invention adopts a bending driving part composed of a pulling piece and an end point retaining piece, and adjusts the bending degree of the catheter by pulling force. The end point retaining piece adopts a double arc piece structure to ensure that the pulling piece penetrates vertically and moves flexibly, so as to realize multi-angle controllable bending of the catheter, adapt to complex paths in the body, and improve the accuracy of operation;

[0024] 3. The invention cooperates with the air inlet part of the clamping part, and expands the expansion part by filling with gas, thereby effectively fixing the relative position of the guide wire and the catheter, preventing the horizontal axis from shifting, ensuring the positioning stability of the hanging ring part, and avoiding the risk of capture failure caused by the shaking of the guide wire;

[0025] 4. The present invention connects the clamping part with the conveying part through the expansion part of the gas resistance part. When the expansion part is filled with gas, the gas is conveyed to the expansion part at the front end of the catheter through the one-way valve, so that it shrinks inward and tightly presses against the connection point between the target object and the hanging ring part to prevent it from falling off and improve the capture reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of the multi-loop structure adjustable curved cavity capture device of the present invention;

[0027] Figure 2 This is an enlarged schematic diagram of the structure at A of the present invention (details of the connection between the hanging loop part and the guide wire);

[0028] Figure 3 It is an overall schematic diagram of the multi-loop structure adjustable curved cavity capture device of the present invention from another perspective;

[0029] Figure 4 This is an enlarged schematic diagram of the structure at B of the present invention (partial structural details of the bending part);

[0030] Figure 5 This is another overall schematic diagram of the multi-loop structure adjustable curved cavity capture device of the present invention from another viewing angle;

[0031] Figure 6 It is an enlarged schematic diagram of the structure at C of the present invention (the structural details of another part of the bending driving part);

[0032] Figure 7 This is another overall schematic diagram of the multi-loop structure adjustable curved cavity capture device of the present invention from another perspective;

[0033] Figure 8Schematic enlarged view of the structure at position D of the present invention (structural details of the clamping part).

[0034] In the figure: 1, guide wire; 2, external sleeve; 3, external tube; 4, catheter; 5, first micro balloon; 6, ferrule; 7, wire; 8, pulling block; 9, intake pipe; 10, connecting pipe; 11, lower patch; 12, second micro balloon; 13, air duct. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0036] As Figures 1 - 8 shown, a multi-loop structure adjustable-bending intracavitary arrester includes: a guide wire 1, and a hanging loop part is arranged at the front end of the guide wire 1;

[0037] An external sleeve 2 is sleeved outside the guide wire 1, a connecting pipe 10 is arranged on one side of the upper end of the external sleeve 2, and an external tube 3 is sleeved outside the catheter 4;

[0038] An actuating bending part is arranged at the upper end of the connection between the catheter 4 and the external tube 3. After the actuating bending part is pulled to one side by a pulling force, the bending degree of the catheter 4 towards that side can be adjusted;

[0039] A clamping part is arranged at the upper end of the connection between the guide wire 1 and the catheter 4. The clamping part can prevent the guide wire 1 from moving along the horizontal axis when the guide wire 1 and the catheter 4 move synchronously;

[0040] An air resistance part is arranged at one end of the catheter 4 close to the ferrule 6. The air resistance part can contract towards the inside of the catheter 4 by magnifying its own structure.

[0041] Embodiment 1: As Figure 1 , Figure 3 , Figure 5 , Figure 7 shown, the hanging loop part is formed by multiple circles with similar sizes intersecting and surrounding each other, centered on a point in space, intersecting at a certain angle with each other, and forming an approximately spherical shape in three-dimensional space. The hanging loop part and the guide wire 1 are integrally arranged:

[0042] There is no obvious overlap between the circles in the hanging loop part. Through interspersed combination, a symmetrical outer shape structure is jointly constructed, and the overlapping part is connected to one end of the guide wire 1.

[0043] Among them, the loop member in the hanging loop portion can be set as a loop 6, one end of the loop 6 is connected to one end of the guide wire 1. Since the front end of the guide wire 1 is provided with a loop 6 arranged in a surrounding cross pattern, when the loop 6 is close to the hook at one end of the vena cava filter, the guide wire 1 is rotated, and the guide wire 1 drives the loop 6 to rotate. The front end of the loop 6 can be bent to one side, so that the loop 6 can be quickly hung on the inner side of the vena cava filter hook. At this time, when the guide wire 1 drives the loop 6 to shrink toward the front section of the catheter 4, all the loops 6 can be gathered toward the center of the catheter 4, so as to make up for the problem of cumbersome operation when a single loop 6 contacts the vena cava filter hook.

[0044] Embodiment 2: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown in 6, the bending driving part is composed of a pulling piece and an end point retaining piece, and the length of the pulling piece is greater than the length of the catheter 4:

[0045] The end point retaining member may be composed of two arc members of the same shape, and the installation points of the two arc members are respectively located at the bottom end of the inner side of the conduit 4 and the upper end of the outer side of the conduit 4;

[0046] The pulling piece and the end point retaining piece are vertically connected.

[0047] Among them, the pulling piece can be set to a drawing wire 7, and the end point retaining piece can be composed of a lower patch 11 and a pulling block 8. Since the lower patch 11 is attached to the port of the outside of the catheter 4 near the ring 6, and the pulling block 8 is installed on the inner side of the external tube 3 near one end of the top of the guide wire 1, and the lower patch 11 and the inner side of the pulling block 8 are both provided with perforations, and the drawing wire 7 vertically penetrates from the inside of the lower patch 11 and the pulling block 8, and the drawing wire 7 and the lower patch 11 are fixedly connected, the drawing wire 7 can also be pulled up and down on the inner side of the pulling block 8, and the drawing wire 7 will drive the lower patch 11 to bend and tilt upwards when being pulled, and the lower patch 11, the drawing wire 7, and the pulling block 8 are annularly arranged on the inner side of the external tube 3, so when the operator wants to bend the catheter 4, he only needs to pull the drawing wire 7 in the opposite direction, and the drawing wire 7 will drive the lower patch 11 at the corresponding position to tilt to one side, so that the catheter 4 is bent as a whole in the specified direction.

[0048] Embodiment 3: Figure 1 , Figure 5 , Figure 7 , Figure 8 As shown, the clamping part is composed of a first expansion member and an air inlet member, the first expansion member is arranged at the upper end of the gap between the guide wire 1 and the catheter 4, and the air inlet member and the first expansion member are connected to each other:

[0049] The outside of the first expansion and contraction component is connected to the conduit 4 by adhesive bonding, and a micro one-way valve is provided between the first expansion and contraction component and the air inlet component.

[0050] Among them, the first expansion part can be set as the second micro airbag 12, the air intake part can be set as the air intake pipe 9, and the air intake pipe 9 can be used for external air pump and other air supply equipment. Since the air intake pipe 9 can be externally connected to the air pump, the air pump inputs the gas from the air intake pipe 9, and the air intake pipe 9 and the second micro airbag 12 are connected to each other, so the air intake pipe 9 introduces the gas into the second micro airbag 12. At this time, the second micro airbag 12 begins to collide. Because the second micro airbag 12 is installed at the upper end between the catheter 4 and the guide wire 1, the second micro airbag 12 will cause the guide wire 1 to be stuck at the upper end of the inner side of the catheter 4 after expansion, so as to prevent the guide wire 1 from maintaining the axial shape when the vena cava filter is not captured, and to prevent the guide wire 1 from suddenly bending and causing the position of the loop 6 to shift.

[0051] Embodiment 4: Figure 1 , Figure 2 , Figure 3 , Figure 5 As shown, the air resistance part is composed of a second expansion member and a conveying member, the second expansion member is arranged at one end of the conduit 4 away from the clamping part, and the second expansion member and the conveying member are connected to each other, the conveying member and the first expansion member built into the clamping part are connected to each other, and a micro one-way valve is arranged between the conveying member and the first expansion member:

[0052] Among them, the second expansion member can be set as the first micro airbag 5, and the conveying member can be set as the airway tube 13. Since the outside of the second micro airbag 12 is connected to one end of the airway tube 13, and the airway tube 13 is arranged inside the catheter 4, and the other end of the airway tube 13 is connected to the first micro airbag 5, the first micro airbag 5 is arranged at the port of the catheter 4 close to the ring 6, when the gas inside the second micro airbag 12 is filled for a period of time, and the operator wants to extend the guide wire 1, the micro one-way valve at the connection between the airway tube 13 and the second micro airbag 12 is opened, and the gas is discharged from the second micro airbag 12 through the The air flows into the interior of the first micro-airbag 5 through the airway tube 13. The first micro-airbag 5 presents a folded and contracted structure as a whole, and the diameter of the first micro-airbag 5 placed at the front end of the catheter 4 is larger than the diameter of the first micro-airbag 5 placed at the front end port of the catheter 4. Therefore, when the first micro-airbag 5 is expanded, the part of the first micro-airbag 5 placed at the front end port of the catheter 4 expands toward the inside of the catheter 4, and this part of the first micro-airbag 5 presses against the connection between the ring 6 and the vena cava filter hook at the port of the catheter 4, so as to prevent the vena cava filter hook from being separated from the ring 6 when the ring 6 is dragging the vena cava filter.

[0053] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to best explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention so as to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A multi-loop structure adjustable bender intracavitary arrester, comprising: A guide wire (1), characterized in that a hanging loop portion is provided at the front end of the guide wire (1); A catheter (4) is sleeved outside the guide wire (1), an external sleeve (2) is sleeved at the upper end of the catheter (4), a receiving pipe (10) is provided on one side of the external sleeve (2), and an external pipe (3) is sleeved outside the catheter (4); An actuating bending portion is provided at the upper end of the connection between the catheter (4) and the external pipe (3). After the actuating bending portion is pulled to one side by a pulling force, the bending degree of the catheter (4) towards that side can be adjusted; A clamping portion is provided at the upper end of the connection between the guide wire (1) and the catheter (4). The clamping portion can prevent the guide wire (1) from moving along the horizontal axis when the guide wire (1) and the catheter (4) move synchronously; An air resistance portion is provided at one end of the catheter (4) close to the ferrule (6). The air resistance portion can contract towards the inner side of the catheter (4) by magnifying its own structure.

2. The intracavitary arrester with an adjustable multi-turn structure according to claim 1, wherein, The hanging loop portion is formed by a plurality of circles with similar sizes intersecting and surrounding each other. Centered on a point in space, they are cross-distributed at a certain angle to each other and form an approximately spherical shape in three-dimensional space. The hanging loop portion is integrally provided with the guide wire (1).

3. The intracavitary capture device with an adjustable multi-turn structure according to claim 2, characterized in that, There is no obvious overlap between the circles in the hanging loop portion. Through interpenetration and combination, they jointly construct a symmetrical outer shape structure and are connected to one end of the guide wire (1) at the overlapping part.

4. A multi-loop structure adjustable bending intracavitary arrester according to claim 1, characterized in that, The actuating bending portion is composed of a pulling member and an end fixing member, and the length of the pulling member is greater than the length of the catheter (4).

5. The intracavitary arrester with adjustable multi-turn structure according to claim 4, characterized in that, The end fixing member can be composed of two arc members with the same shape. The installation positions of the two arc members are respectively located at the bottom end inside the catheter (4) and the upper end outside the catheter (4).

6. The intracavitary arrester with an adjustable multi-turn structure according to claim 5, characterized in that Holes are formed inside the end fixing members, and the diameter of the holes is greater than the diameter of the pulling member.

7. A multi-loop structure adjustable bending intracavitary arrester according to claim 6, characterized in that, The pulling member and the end fixing member are vertically and penetratingly connected.

8. A multi-turn structure adjustable bending intracavitary arrester according to claim 1, characterized in that, The clamping portion is composed of a first telescopic member and an air inlet member. The first telescopic member is arranged at the upper end of the gap between the guide wire (1) and the catheter (4), and the air inlet member is connected to the first telescopic member.

9. The intracavitary arrester with an adjustable multi-turn structure according to claim 8, wherein, The outside of the first telescopic member is adhesively connected to the catheter (4), and a micro check valve is arranged between the first telescopic member and the air inlet member.

10. The intracavitary arrester with an adjustable multi-turn structure according to claim 1, characterized in that, The air resistance portion is composed of a second telescopic member and a conveying member. The second telescopic member is arranged at one end of the catheter (4) away from the clamping portion, and the second telescopic member is connected to the conveying member. The conveying member is communicated with the first telescopic member arranged inside the clamping portion, and a micro check valve is arranged between the conveying member and the first telescopic member.

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