Guidewire retraction device

Abstract

The present invention provides a guide wire retraction device, which belongs to the field of medical device technology, and includes: a mounting seat; a guide wire clamp; one end of a limit rope is connected to the mounting seat, and the other end is connected to the guide wire clamp; the guide wire clamp has a first position and a second position relative to the mounting seat, the guide wire clamp is in the first position, the limit rope is in a relaxed state, and the guide wire clamp is in the second position, the limit rope is in a tightened state; in the process of the guide wire clamp moving from the first position to the second position, the guide wire clamp pulls the guide wire to move a distance d1, the distance between the distal end of the balloon and the perfusion hole is d2, the distance between the distal end of the balloon and the rapid exchange port is d3, and d2<d1<d3. The tightenable length of the limit rope of the present invention can ensure that the distal end of the guide wire is withdrawn to between the perfusion hole and the rapid exchange port, is not affected by the insertion position of the guide catheter, and does not need to judge whether the guide wire is withdrawn to the right position by observing the developing mark; as long as the limit rope is tightened, the guide wire will inevitably withdraw to the appropriate position, and the operation is simple, the judgment is convenient and accurate.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a guide wire withdrawal device. Background Art

[0002] The perfusion balloon dilatation catheter has multiple perfusion holes at its proximal and distal ends. When the balloon is inflated, blood can still flow through the perfusion holes and the balloon into the distal end of the lesion. During the interventional treatment of cardiovascular diseases, it can ensure blood circulation, prolong the treatment time, and increase the safety of stent surgery for patients who cannot tolerate prolonged ischemia.

[0003] In order to ensure blood circulation and maintain a large blood flow, the guide wire needs to be withdrawn to the proximal perfusion hole during the perfusion balloon expansion process; after the perfusion balloon is used, the guide wire can be returned to its original position as needed. Usually, a development mark is installed behind the perfusion hole, and the guide wire can be withdrawn to the development mark position. The guide wire will neither occupy the perfusion path nor slip out of the quick exchange port due to a long withdrawal distance.

[0004] However, the general distance between the developing mark and the balloon is 5-8cm. When the distance between the lesion and the guide catheter port is smaller than the distance between the developing mark and the balloon, the developing mark will be hidden in the guide catheter, and the developing mark cannot be observed through angiography, and it is impossible to judge whether the guide wire withdrawal position is appropriate; if the withdrawal distance is insufficient, the guide wire is not completely withdrawn to the perfusion hole, which will affect the perfusion blood flow, causing myocardial ischemia in the patient and affecting the surgical effect; if the guide wire withdrawal distance is too long, the guide wire is withdrawn from the rapid exchange port, and the doctor will need to re-insert the guide wire during the subsequent operation, which increases the operation time, and if the doctor does not find the guide wire slippage and pushes the guide wire as usual, the guide wire is likely to penetrate the blood vessel wall and cause serious complications. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when the development mark is hidden in the guide catheter, the development mark cannot be observed through angiography, and therefore it is impossible to judge whether the guide wire withdrawal position is appropriate, thereby providing a guide wire withdrawal device that can ensure the guide wire withdrawal position is appropriate.

[0006] In order to solve the above technical problems, the present invention provides a guidewire withdrawal device, comprising:

[0007] A mounting seat, adapted to be connected to a handle of a catheter for perfusing a balloon dilatation catheter;

[0008] A guide wire clamp having a clamping end for fixing the guide wire;

[0009] A limiting rope, one end of which is connected to the mounting seat, and the other end of which is connected to the guide wire clamp;

[0010] The guide wire clamp has a first position and a second position relative to the mounting seat, the guide wire clamp is in the first position, the limit rope is in a relaxed state, and the guide wire clamp is in the second position, the limit rope is in a tightened state;

[0011] During the movement of the guidewire clamp from the first position to the second position, the guidewire clamp pulls the guidewire to move a distance d1, the distance between the distal end of the balloon and the perfusion hole is d2, the distance between the distal end of the balloon and the quick exchange port is d3, and d1, d2, and d3 satisfy the following relationship: d2<d1<d3.

[0012] As a preferred solution, a receiving cavity is provided on the mounting seat, one end of the limiting rope is connected to the receiving cavity, and the other end of the limiting rope extends out of the receiving cavity and is connected to the guide wire clamp.

[0013] As a preferred solution, it also includes:

[0014] A fixed shaft, vertically connected in the accommodating cavity of the mounting seat;

[0015] The bobbin is rotatably sleeved on the fixed shaft, and the limiting rope is connected to the bobbin.

[0016] As a preferred solution, the mounting seat has a threading hole connected to the accommodating cavity, the axis of the threading hole is perpendicular to the axis of the fixed shaft, and one end of the limiting rope can extend out of the accommodating cavity through the threading hole.

[0017] As a preferred solution, one end of the accommodating cavity of the mounting seat has an opening, and one end of the fixing shaft faces the direction of the opening.

[0018] As a preferred embodiment, the end of the fixed shaft facing the opening of the accommodating cavity has an elastic buckle, which is suitable for radial expansion and contraction; the outer diameter of the elastic buckle in a naturally expanded state is larger than the inner diameter of the bobbin, and the outer diameter of the elastic buckle in a contracted state due to external force is smaller than the inner diameter of the bobbin.

[0019] As a preferred embodiment, the guide wire clamp comprises:

[0020] The shell has a clamping opening, and an anti-slip pad is arranged on at least one side of the clamping opening.

[0021] As a preferred solution, the housing is provided with a notch and a sliding block opposite to the notch, the sliding block is connected with an elastic member, and the elastic member has a biasing force that causes the sliding block to slide toward the notch;

[0022] The anti-slip pad is a silicone pad, and the silicone pad is arranged on one end of the sliding block facing the notch.

[0023] As a preferred solution, the housing has a pumping cavity, the sliding block is accommodated in the pumping cavity, and the end of the pumping cavity away from the notch has an opening, and further comprises:

[0024] A fixing block blocks one end of the opening of the pumping cavity, and a guide hole suitable for the pulling rod to pass through is arranged at the center of the fixing block.

[0025] As a preferred solution, the mounting seat is provided with a first slot suitable for elastically engaging with the handle, and the first slot has a positioning surface suitable for being aligned with the end surface of the handle.

[0026] The technical solution of the present invention has the following advantages:

[0027] 1. The guidewire retraction device provided by the present invention has a mounting seat connected to the handle, thereby fixing the fixed end of the limit rope; when the guidewire clamp is in the first position, the guidewire passes through the quick exchange port and extends to the distal end of the balloon, and the limit rope is in a relaxed state at this time; when the guidewire clamp is in the second position, the guidewire is withdrawn to a certain position between the quick exchange port and the infusion hole, and the limit rope is in a taut state at this time, and the guidewire can no longer continue to move in the direction of the quick exchange port, that is, the guidewire is withdrawn to a suitable position; the tightenable length of the limit rope can ensure that the distal end of the guidewire is withdrawn to between the infusion hole and the quick exchange port, and is not affected by the insertion position of the guide catheter, and there is no need to judge whether the guidewire is withdrawn in place by observing the developing mark; as long as the limit rope is tightened, the guidewire will inevitably be withdrawn to a suitable position, and the operation is simple, and the judgment is convenient and accurate.

[0028] 2. The guide wire retraction device provided by the present invention accommodates the limit rope in the accommodating cavity of the mounting seat to prevent the limit rope from being damaged due to accidental pulling before use.

[0029] 3. In the guide wire retraction device provided by the present invention, before the guide wire is retracted, a limiting rope is wound on the spool, and the winding length of the limiting rope is equal to the retractable length of the guide wire. The orderly winding arrangement of the limiting rope avoids the normal retraction of the guide wire due to tangling caused by disorder.

[0030] 4. The guide wire retraction device provided by the present invention can realize the taking and placing of the spool from the opening of the accommodating cavity, and the spool can be taken out and the limiting rope can be rewound, so that the whole device can be used repeatedly.

[0031] 5. The guide wire retraction device provided by the present invention has an elastic buckle that can achieve axial blocking of the spool in a naturally expanded state, thereby preventing the axial movement of the spool from affecting the retraction position of the guide wire; the radial contraction of the elastic buckle facilitates the removal and placement of the spool.

[0032] 6. In the guide wire retraction device provided by the present invention, the guide wire is clamped by an anti-slip pad to prevent it from being separated from the shell during the retraction process.

[0033] 7. The guide wire retraction device provided by the present invention cooperates with the sliding block and the elastic member to realize automatic clamping of the guide wire; the anti-slip pad is made of silicone pad, which increases the friction with the guide wire and prevents radial deformation of the guide wire.

[0034] 8. The guide wire retraction device provided by the present invention pulls the sliding block to move by a pulling rod, and the pulling rod slides in the through hole of the fixed block, and the through hole plays a guiding role to ensure the moving trajectory of the sliding block.

[0035] 9. The guide wire retraction device provided by the present invention determines the installation position of the mounting seat through the positioning surface of the first slot, and then determines the position of the fixed end of the limiting rope, so the positioning is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 Schematic diagram of the structure of the perfusion balloon dilatation catheter.

[0038] Figure 2 It is a schematic diagram of the three-dimensional structure of the guide wire withdrawal device provided in the present invention.

[0039] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting base.

[0040] Figure 4 for Figure 3 Top view of the .

[0041] Figure 5 for Figure 4 Cross-sectional view in the AA direction.

[0042] Figure 6 Schematic diagram of the internal relationship between the spool and the mounting base.

[0043] Figure 7 Schematic diagram of the three-dimensional structure of the spool.

[0044] Figure 8 Axial cross-sectional view of the spool.

[0045] Fig. 9 It is a schematic diagram of the three-dimensional structure of the guide wire clamp.

[0046] Fig.10 This is an axial cross-sectional view of the guidewire clamp.

[0047] Description of reference numerals:

[0048] 1. Mounting seat; 2. Guide wire clamp; 3. Limiting rope; 4. Handle; 5. Outer tube; 6. Inner tube; 7. Balloon; 8. Quick exchange port; 9. Infusion hole; 10. Flange plate; 11. First card slot; 12. Second card slot; 13. Accommodating cavity; 14. Fixed axis; 15. Threading hole; 16. Elastic buckle; 17. Expansion column; 18. Protrusion; 19. Through cavity; 20. Threading groove; 21. Shell; 22. Sliding block; 23. Fixed block; 24. Pull rod; 25. Elastic part; 26. Connecting hole; 27. Notch; 28. Spool; 29. ​​Guide wire; 30. Development mark; 31. Guide catheter. DETAILED DESCRIPTION

[0049] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0050] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] like Figure 1As shown, the guidewire retraction device provided in this embodiment includes: a mounting seat 1, a guidewire clamp 2 and a limiting rope 3 connected between the mounting seat 1 and the guidewire clamp 2; when in use, the guidewire retraction device needs to be installed on the perfusion balloon 7 dilatation catheter.

[0054] like Figure 2 As shown, the perfusion balloon 7 dilatation catheter includes: a handle 4, an outer tube 5, an inner tube 6 and a balloon 7; a quick exchange port 8 is opened on the outer tube 5 near the balloon 7, and the inner tube 6 is nested in the outer tube 5 from the quick exchange port 8 and extends into the balloon 7; a perfusion hole 9 is provided between the quick exchange port 8 and the proximal end of the balloon 7, and the perfusion hole 9 is connected to the inner tube 6. The process of introducing the perfusion balloon 7 dilatation catheter into the blood vessel is as follows: introducing the guide catheter 31 into the blood vessel, the perfusion balloon 7 dilatation catheter enters the blood vessel through the guide catheter 31, and the balloon 7 supports the lesion position of the blood vessel; during the introduction of the perfusion balloon 7 dilatation catheter, the guide wire 29 is introduced from the rapid exchange port 8 and extends into the distal end of the balloon 7, and the guide wire 29 assists the introduction of the perfusion balloon 7 dilatation catheter; during the expansion of the balloon 7, in order to ensure blood circulation and maintain a large blood flow, it is necessary to withdraw the guide wire to between the perfusion hole 9 and the rapid exchange port 8, inject blood through the perfusion hole 9, and after the balloon 7 is expanded, the guide wire is returned to its original position as needed. The distance between the distal end of the balloon 7 and the perfusion hole 9 is d2, and the distance between the distal end of the balloon 7 and the rapid exchange port 8 is d3. The positional relationship between the withdrawal distance of the guide wire and the perfusion hole 9 and the quick exchange port 8 is: the distance between the distal end of the balloon 7 and the perfusion hole 9 is d2, the distance between the distal end of the balloon 7 and the quick exchange port 8 is d3, and the withdrawal distance of the guide wire is d1, then d2<d1<d3.

[0055] like Figure 2 As shown, in order to confirm whether the guide wire 29 is retracted into place, a development mark 30 is provided on the inner tube 6, and the development mark 30 is located between the perfusion hole 9 and the quick exchange port 8. When the distal end of the guide wire 29 is retracted to the development mark 30, it is retracted into place; when the development mark 30 is located inside the guide catheter 31, the position of the development mark 30 cannot be observed, so it is impossible to determine whether the guide wire 29 is retracted into place.

[0056] like Figure 3 , Figure 4As shown, the two sides of the mounting seat 1 are respectively provided with a first slot 11 and a second slot 12; the first slot 11 is a through slot formed by splicing a semicircular slot and a rectangular slot, and the mounting seat 1 is elastically connected with the handle 4 of the dilatation catheter of the perfusion balloon 7 through the first slot 11; wherein, the semicircular slot is connected to the handle 4, and the flange plate 10 on the side of the handle 4 extends into the rectangular slot, and the front and rear end surfaces of the first slot 11 are used as positioning surfaces, which are respectively aligned with the front and rear end surfaces of the flange plate 10. The second slot 12 is a semicircular through slot, which is elastically connected with the guide wire clamp 2.

[0057] like Figure 5 As shown, a receiving cavity 13 with an opening at one end is provided on the top surface of the mounting seat 1, and a fixed shaft 14 is vertically connected to the inner bottom surface of the receiving cavity 13; a threading hole 15 is provided on the side of the mounting seat 1, and the axial direction of the threading hole 15 is consistent with the slot length direction of the second slot 12, and the threading hole 15 is communicated with the receiving cavity 13; an elastic buckle 16 is connected to the top end of the fixed shaft 14, and the elastic buckle 16 has four expansion columns 17; the four expansion columns 17 are symmetrical and spaced around and form a cross-shaped opening at the axis, and the top ends of the four expansion columns 17 all have protrusions 18 extending outward; the elastic buckle 16 can expand and contract radially, and the radial distance of the protrusion 18 in the natural expansion state is greater than the diameter of the fixed shaft 14, and the radial distance of the protrusion 18 in the contracted state is equal to the diameter of the fixed shaft 14.

[0058] like Figure 6 , Figure 7 , Figure 8 As shown, the bobbin 28 has a through cavity 19 arranged along its axis, and is rotatably mounted on the fixed shaft 14 through the through cavity 19, and a through threading groove 20 is provided on the outer wall of the bobbin; in the natural expansion state, the radial distance of the protrusion 18 is greater than the inner diameter of the bobbin 28, which can achieve axial blocking of the bobbin and prevent the axial movement of the bobbin from affecting the withdrawal position of the guide wire.

[0059] like Figure 6 As shown, the limiting rope 3 is wound on the spool, and the winding length is equal to the withdrawal distance d1 of the guide wire. One end of the limiting rope 3 is tied and fixed through the threading groove 20, and the other end passes through the accommodating cavity 13 through the threading hole 15 and is connected to the guide wire clamp 2.

[0060] like Fig. 9 , Fig.10As shown, the guide wire clamp 2 includes: a shell 21, a sliding block 22, a fixed block 23, a pulling rod 24 and an elastic member 25; the shell 21 has an open twitching cavity at one end, and the end of the shell 21 away from the opening of the twitching cavity is provided with a connecting hole 26, and the limiting rope 3 extends into the connecting hole 26 and is sealed and fixed with glue; a notch 27 is provided on the outer wall of the shell 21, and the notch 27 is connected to the twitching cavity; the fixed block 23 blocks the open end of the twitching cavity and is provided with a penetrating guide hole; the sliding block 22 is slidably arranged in the twitching cavity and is in sliding contact with the inner wall of the shell 21, and the The end of the sliding block 22 facing away from the fixed block 23 forms a clamp suitable for clamping the guide wire with the inner bottom surface of the pulling cavity; the end of the sliding block 22 facing away from the fixed block 23 is connected to an anti-slip pad, and the anti-slip pad is a silicone pad; the end of the sliding block 22 facing the fixed block 23 is vertically connected to a pulling rod 24, one end of the pulling rod 24 passes through the guide hole and extends out of the pulling cavity; the elastic member 25 is sleeved on the pulling rod 24, one end of which is connected to the sliding block 22, and the other end is connected to the fixed block 23, providing a biasing force to make the sliding block 22 slide toward the notch 27.

[0061] Usage process:

[0062] The guide wire retraction device is clamped on the dilatation catheter handle 4 of the perfusion balloon 7 through the mounting block, and the front and rear end surfaces of the first clamping groove 11 are aligned with the front and rear end surfaces of the flange plate 10 of the handle 4;

[0063] Remove the guide wire clamp 2 from the second clamping groove 12, pull the pulling rod 24 to separate the sliding block 22 from the inner bottom surface of the pumping cavity, and insert the guide wire; release the pulling rod 24 to clamp the guide wire; at this time, the guide wire clamp 2 is in the first position, and the limiting rope 3 is wound on the bobbin 28;

[0064] Move the guide wire clamp 2 to make the guide wire withdraw in the direction away from the balloon 7 until the winding part of the limiting rope 3 is completely separated from the spool 28, and tighten the limiting rope 3. At this time, the guide wire cannot move further, that is, the guide wire is withdrawn into place;

[0065] After the operation is completed, the guide wire is pushed forward to return to its original position, and the guide wire is taken out from the guide wire clamp 2, and the guide wire withdrawal device is removed from the perfusion balloon 7 expansion catheter handle 4 to complete the operation.

[0066] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A guide wire retraction device, characterized in that: include: A mounting seat (1) adapted to be connected to a handle (4) of a dilatation catheter for infusing a balloon (7); A guide wire clamp (2) having a clamping end for fixing the guide wire (29); A limiting rope (3), one end of which is connected to the mounting seat (1) and the other end of which is connected to the guide wire clamp (2); The guide wire clamp (2) has a first position and a second position relative to the mounting seat (1); when the guide wire clamp (2) is in the first position, the limiting rope (3) is in a relaxed state; when the guide wire clamp (2) is in the second position, the limiting rope (3) is in a tightened state; During the movement of the guide wire clamp (2) from the first position to the second position, the guide wire clamp (2) pulls the guide wire (29) to move a distance d1, the distance between the distal end of the balloon (7) and the perfusion hole (9) is d2, the distance between the distal end of the balloon (7) and the quick exchange port (8) is d3, and d1, d2, and d3 satisfy the following relationship: d2<d1<d3; and in the first position, the guide wire (29) passes through the quick exchange port (8) and extends into the distal end of the balloon (7), and in the second position, the guide wire (29) is withdrawn to a position between the quick exchange port (8) and the perfusion hole (9).

2. The guidewire retraction device according to claim 1, characterized in that: The mounting seat (1) is provided with a receiving cavity (13), one end of the limiting rope (3) is connected to the receiving cavity (13), and the other end of the limiting rope (3) extends out of the receiving cavity (13) and is connected to the guide wire clamp (2).

3. The guidewire retraction device according to claim 2, characterized in that: Also includes: A fixed shaft (14) vertically connected in the accommodating cavity (13) of the mounting seat (1); The bobbin (28) is rotatably sleeved on the fixed shaft (14), and the limiting rope (3) is connected to the bobbin.

4. The guidewire retraction device according to claim 3, characterized in that: The mounting seat (1) has a threading hole (15) connected to the accommodating cavity (13), the axis of the threading hole (15) is perpendicular to the axis of the fixed shaft (14), and one end of the limiting rope (3) can extend out of the accommodating cavity (13) through the threading hole (15).

5. The guidewire retraction device according to claim 4, characterized in that: One end of the accommodating cavity (13) of the mounting seat (1) has an opening, and one end of the fixing shaft (14) faces the direction of the opening.

6. The guidewire retraction device according to claim 5, characterized in that: An end of the fixed shaft (14) that is open toward the accommodating cavity (13) is provided with an elastic buckle (16), and the elastic buckle (16) is suitable for radial expansion and contraction; the outer diameter of the elastic buckle (16) in a naturally expanded state is larger than the inner diameter of the bobbin, and the outer diameter of the elastic buckle (16) in a contracted state under external force is smaller than the inner diameter of the bobbin.

7. The guidewire retraction device according to any one of claims 1 to 6, characterized in that: The guide wire clamp (2) comprises: The housing (21) has a clamping opening, and an anti-slip pad is arranged on at least one side of the clamping opening.

8. The guidewire retraction device according to claim 7, characterized in that: The housing (21) is provided with a notch (27) and a sliding block (22) opposite to the notch (27); the sliding block (22) is connected to an elastic member (25); the elastic member (25) has a biasing force that causes the sliding block (22) to slide in the direction of the notch (27); The anti-slip pad is a silicone pad, and the silicone pad is arranged on one end of the sliding block (22) facing the notch (27).

9. The guidewire retraction device according to claim 8, characterized in that: The housing (21) has a pumping cavity in it, the sliding block (22) is accommodated in the pumping cavity, and the end of the pumping cavity away from the notch (27) has an opening, and further comprises: A fixing block (23) blocks one end of the opening of the pumping cavity, and a guide hole suitable for the pulling rod (24) to pass through is provided at the center of the fixing block (23).

10. The guidewire retraction device according to claim 7, characterized in that: The mounting seat (1) is provided with a first clamping groove (11) suitable for elastic clamping with the handle (4), and the first clamping groove (11) has a positioning surface suitable for being aligned with the end surface of the handle (4).

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