Clamp for a guide wire catheter

Abstract

The application provides a clamp for a guide wire catheter, comprising a first clamp head, a second clamp head and a mounting base, the first clamp head and the second clamp head are movably mounted on the mounting base, and the first clamp head and the second clamp head can move away from or close to each other; the first clamp head and the second clamp head are matched to form a first clamping part for clamping a guide wire and a second clamping part for clamping a catheter, and a through gap is communicated between the first clamping part and the second clamping part, the through gap allows the guide wire to pass through, and the through gap does not allow the catheter to pass through; when the first clamp head and the second clamp head move close to each other to an extreme position, the first clamping part clamps the guide wire, the second clamping part clamps the catheter, and the guide wire and the catheter do not produce obvious deformation. The first clamping part and the second clamping part clamp the guide wire and the catheter respectively, the guide wire or the catheter can be clamped without being damaged, the structure is simple, and the stability and reliability of the guide wire or the catheter clamping can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of interventional surgery robots, in particular to a clamp for a guide wire catheter. BACKGROUND

[0002] An interventional surgery robot requires a clamp at the end to clamp a catheter and a guide wire respectively, to complete actions such as advancing and retreating, rotating, etc. Among them, the guide wire has a very small diameter and a hydrophilic super-smooth coating on the surface, so a considerable holding force is required when holding the guide wire to prevent slipping between the guide wire and the clamp. The catheter has a larger diameter than the guide wire and a relatively rough surface, so it is not easy to slip during operation, but the catheter is a hollow structure and has a certain flexibility, so it is easy to be clamped flat during operation, affecting the use performance.

[0003] The existing Chinese patent with the publication number CN211024680U discloses an interventional embolization surgery guide wire catheter manipulation device, which relates to medical instruments. It includes a guide wire catheter pushing module, a guide wire catheter rotating module, a telescopic catheter mechanism, a movable contrast catheter locking mechanism, a guide wire force feedback module, and a control system. The guide wire catheter pushing module includes a guide wire feeding end micro-precision lead screw module and a catheter feeding end micro-precision lead screw module, and is also provided with a pressing moving slider. The guide wire catheter rotating module is composed of a hollow rotating index plate and a guide wire catheter locking device. The telescopic catheter mechanism includes three groups of telescopic catheters. The guide wire force feedback module includes a thin film pressure sensor and a pressure acquisition card. The movable contrast catheter locking mechanism is arranged in front of the catheter feeding end micro-precision lead screw module. The control system is used to control the coordinated operation of the pushing module and the rotating module.

[0004] The inventor believes that in the prior art, when the same clamp is used to clamp the catheter and the guide wire respectively, the clamping current needs to be controlled to ensure that the clamping force is moderate, preventing the guide wire from slipping and the catheter from being clamped and damaged. However, this puts high requirements on control and has poor reliability, and there is room for improvement. SUMMARY

[0005] In view of the defects in the prior art, the purpose of the present application is to provide a clamp for a guide wire catheter.

[0006] The utility model provides a clamp for guide wire catheter, including first chuck, second chuck and installation matrix, first chuck and second chuck are all movably installed on installation matrix, and first chuck and second chuck can be far away or close to each other, first chuck and second chuck cooperation forms first clamping part for clamping guide wire and second clamping part for clamping catheter, and the through gap is communicated between first clamping part and second clamping part, the through gap allows guide wire to pass, and the through gap does not allow catheter to pass, when first chuck and second chuck are close to each other to limit position, first clamping part clamps guide wire, second clamping part clamps catheter, and guide wire and catheter do not produce obvious deformation.

[0007] Preferably, the first chuck is provided with a support plate, the support plate is formed with a space for placing the guide wire and the catheter, and the support plate is provided with a partition block, the partition block separates the space for placing the guide wire and the catheter on the support plate into two parts, and the space for placing the catheter is communicated with the space for placing the guide wire.

[0008] Preferably, the support plate is provided with a stop block at one end close to the second chuck, and the through gap is formed by the cooperation of the partition block and the stop block.

[0009] Preferably, the partition block is formed with an arc-shaped guide surface at one end close to the stop block.

[0010] Preferably, the top of the stop block extends from bottom to top towards the first chuck.

[0011] Preferably, the space for placing the guide wire is located below the space for placing the catheter.

[0012] Preferably, the side walls of the first chuck and the second chuck close to each other are each provided with an upper clamping table and a lower clamping table, the two upper clamping tables are correspondingly arranged with the second clamping part, and the two lower clamping tables are correspondingly arranged with the first clamping part; the thickness of the lower clamping table on the first chuck is greater than that of the upper clamping table, and the thickness of the lower clamping table on the second chuck is greater than that of the upper clamping table.

[0013] Preferably, the thickness of the lower clamping table on the first chuck or the second chuck is 0.7-0.8mm greater than that of the upper clamping table.

[0014] Preferably, the diameter of the guide wire is between 0.36mm and 0.9mm.

[0015] Preferably, the diameter of the catheter is between 1.67mm and 2.67mm.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The present invention uses a first clamping part and a second clamping part formed by the cooperation of a first clamp and a second clamp to clamp the guide wire and the catheter respectively, which can achieve the clamping of the guide wire or catheter without damage, and the structure is simple, which helps to improve the stability and reliability of the clamping of the guide wire or catheter;

[0018] 2. The present invention, by setting an arc-shaped guide surface on the separator, helps to reduce the occurrence of scratches on the coating of the guide wire by the separator, thereby helping to improve the safety of the guide wire during clamping.

[0019] 3. The present invention uses a stop that extends from the top upwards toward the first clamp, which helps to reduce the occurrence of the catheter accidentally coming out of the second clamping part when clamping the catheter, thereby helping to improve the convenience of catheter installation. Attached Figure Description

[0020] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram illustrating the overall structure of the fixture, which is the main feature of this invention.

[0022] Figure 2 This is a schematic diagram illustrating the overall structure of the first chuck, which is the main feature of this invention.

[0023] As shown in the figure:

[0024] Detailed Implementation

[0025] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0026] like Figure 1 As shown, a clamp for a guidewire catheter according to the present invention includes a first clamp 2, a second clamp 3, and a mounting base 1. Both the first clamp 2 and the second clamp 3 are movably mounted on the mounting base 1, which serves as the mounting foundation for the first clamp 2 and the second clamp 3. The first clamp 2 and the second clamp 3 can move away from or towards each other. The material used to manufacture the clamp should be biocompatible, and the clamp is manufactured in a sterile environment. The mounting base 1 has an electromechanical structure that drives the first clamp 2 and the second clamp 3 to move towards each other, thereby clamping the clamp, and drives the first clamp 2 and the second clamp 3 to move away from each other, thereby opening the clamp.

[0027] The clamping object of the clamp is a guide wire or a catheter. The first chuck 2 and the second chuck 3 cooperatively form a first clamping portion 4 for clamping the guide wire and a second clamping portion 5 for clamping the catheter. The first clamping portion 4 and the second clamping portion 5 are connected through a through gap 6, which allows the guide wire to pass through but not the catheter. When the first chuck 2 and the second chuck 3 are close to each other to the limit position, the first clamping portion 4 clamps the guide wire and the second clamping portion 5 clamps the catheter, and neither the guide wire nor the catheter is significantly deformed.

[0028] As shown in Figure 1 and Figure 2 , the first chuck 2 is provided with a support plate 7 extending towards the side close to the first chuck 2. The support plate 7 is provided with a space for placing the guide wire and the catheter. The support plate 7 is integrally provided with a partition block 8, which divides the space on the support plate 7 for placing the guide wire and the catheter into two parts, with the space for placing the guide wire being below the space for placing the catheter.

[0029] The end of the support plate 7 close to the second chuck 3 is integrally provided with a stop block 9, which is spaced apart from the partition block 8 and cooperatively forms the through gap 6. The diameter of the through gap 6 is greater than the diameter of the guide wire and less than the diameter of the catheter. The end of the partition block 8 close to the stop block 9 is provided with an arc-shaped guide surface to avoid scratching the surface coating of the guide wire. The top of the stop block 9 extends from bottom to top towards the direction close to the first chuck 2 to prevent the catheter from accidentally coming out of the space for placing the catheter. The support plate 7 is provided on both sides of the first chuck 2, and the two support plates 7 are at the same height, which improves the stability of the guide wire or the catheter placed on the support plate 7.

[0030] As shown in Figure 1 and Figure 2 , the side walls of the first chuck 2 and the second chuck 3 close to each other are provided with an upper clamping platform 10 and a lower clamping platform 11. The two upper clamping platforms 10 are at the same height and have the same thickness, and cooperatively form the first clamping portion 4 with the space for placing the catheter. The two lower clamping platforms 11 are at the same height and have the same thickness, and cooperatively form the second clamping portion 5 with the space for placing the guide wire. The thickness of the lower clamping platform 11 is greater than that of the upper clamping platform 10, so that when the guide wire and the catheter are clamped at the same time, neither the guide wire nor the catheter is significantly deformed. The size of the first clamping portion 4 is determined according to the smooth sliding of the guide wire, and the gap between the first clamping portion 4 and the second clamping portion 5 can satisfy the condition that when the clamp clamps the catheter and the guide wire for rotation, both the catheter and the guide wire are close to the rotation center.

[0031] The diameter of the guide wire is between 0.36mm-0.9mm, the thinner the guide wire, the greater the required clamping force; the diameter of the catheter is between 1.67mm-2.67mm, the main factors affecting whether the catheter is clamped are the clamping force and the rigidity of the catheter itself. For the most commonly used coronary catheter with a diameter of 2mm, the thickness of the lower clamp table 11 is 0.7-0.8mm greater than that of the upper clamp table 10.

[0032] When the guide wire needs to be clamped, first open the first clamp head 2 and the second clamp head 3, place the guide wire in the space for placing the catheter, then pull the guide wire to the right and down, so that it passes through the gap 6 and falls into the space for placing the guide wire. After the guide wire is placed flat, clamp the first clamp head 2 and the second clamp head 3, the clamping force should be enough to ensure that the guide wire does not slip at all. After the guide wire is clamped, the operations such as advancing and retracting the wire, rotating, etc. can be completed. When the catheter needs to be clamped, first open the first clamp head 2 and the second clamp head 3, place the catheter in the space for placing the catheter, then clamp the first clamp head 2 and the second clamp head 3 after the catheter is placed flat, the clamping force remains the same as when clamping the guide wire.

[0033] In this case, when the lower clamp table 11 on the first clamp head 2 and the second clamp head 3 contacts each other, it prevents the first clamp head 2 and the second clamp head 3 from continuing to approach each other. Although the total clamping force of the clamp is still large, the force exerted by the upper clamp table 10 directly on the catheter will only be maintained at a certain required value and will not continue to increase, protecting the catheter from being clamped. Under this specific clamping force, the catheter is clamped perfectly and operations such as advancing and retracting the wire, rotating, etc. can be completed.

[0034] In order to further verify the effect of the thickness difference between the lower clamp table 11 and the upper clamp table 10 on the guide wire and the catheter, experiments were conducted, and the following table shows the values of the tensile force that the catheter can withstand and the clamp marks produced when the catheter is clamped under different thickness differences between the lower clamp table 11 and the upper clamp table 10.

[0035]

[0036] From the table, when the thickness difference between the upper clamp 10 and the lower clamp 11 is greater than 1 mm, the gap between the first clamp 2 and the second clamp 3 when the upper clamp 10 is clamped is greater than 2 mm, which is greater than the size of the catheter itself, and the force between the catheter and the clamp is weak. When the thickness difference is 0.8 mm, the pulling force reaches 7.5 N, which is greater than 5 N, meeting the requirements of operating the catheter under normal circumstances, and at this time the catheter still has no obvious clamp marks. When the thickness difference reaches 0.7 mm, the pulling force reaches 12 N, and the catheter is clamped more tightly, but at this time a slight clamp mark can be observed on the surface of the catheter. If a guide wire is placed in it at this time, the clamp mark is basically restored, and the catheter can still be used. When the thickness difference is smaller, at 0.6 mm, the deformation is more obvious, slightly affecting the use, and if the thickness difference is further reduced, the impact on the catheter will be greater and greater. Therefore, as described above, for the most commonly used coronary catheter with a diameter of 2 mm, the thickness difference of the clamp can be set to 0.7 mm-0.8 mm according to actual use needs.

[0037] For different types of interventional procedures, various types of catheters will be used, because most catheters are hard, and the existing clamping force is not enough to flatten them. According to experimental data, the thickness difference between the upper clamp 10 and the lower clamp 11 should be 35% to 40% of the diameter of the catheter, at which time the catheter can be clamped without being damaged.

[0038] Working principle

[0039] When a guide wire needs to be clamped, first open the first clamp 2 and the second clamp 3, and place the guide wire lightly in the space for placing the catheter, then pull the guide wire downward to the right, so that it passes through the gap 6 and falls into the space for placing the guide wire. After the guide wire is placed flat, clamp the first clamp 2 and the second clamp 3, and the clamping force should be sufficient to ensure that the guide wire does not slip at all. After the guide wire is clamped, the operations of advancing and retracting the wire, rotating, etc. can be completed. When a catheter needs to be clamped, first open the first clamp 2 and the second clamp 3, and place the catheter lightly in the space for placing the catheter. After the catheter is placed flat, clamp the first clamp 2 and the second clamp 3, and the clamping force should be consistent with the clamping force when clamping the guide wire.

[0040] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0041] The specific embodiments of the present application are described above. It needs to be understood that the present application is not limited to the specific embodiments described above, and various changes or modifications can be made by those skilled in the art within the scope of the claims, which does not affect the essential content of the present application. The embodiments of the present application and the features in the embodiments can be combined with each other at will without conflict.

Claims

1. A clip for a guide wire catheter, characterized in that, The utility model provides a kind of wire and catheter clamping device, including first chuck (2), second chuck (3) and installation matrix (1), first chuck (2) and second chuck (3) are movably installed on installation matrix (1), and first chuck (2) and second chuck (3) can be away from each other or close to each other; First chuck (2) and second chuck (3) are cooperatively formed with first clamping portion (4) for clamping wire and second clamping portion (5) for clamping catheter, and through gap (6) is communicated between first clamping portion (4) and second clamping portion (5), the through gap (6) allows wire to pass through, and the through gap (6) does not allow catheter to pass through; When first chuck (2) and second chuck (3) are close to each other to limit position, first clamping portion (4) clamps wire, second clamping portion (5) clamps catheter, and wire and catheter do not produce obvious deformation; Supporting plate (7) is provided on first chuck (2), space for placing wire and catheter is formed on supporting plate (7), and separating block (8) is provided on supporting plate (7), separating block (8) separates space for placing wire and catheter formed on supporting plate (7) into two parts, and space for placing catheter is communicated with space for placing wire; End of supporting plate (7) close to second chuck (3) is provided with stop block (9), and through gap (6) is cooperatively formed by separating block (8) and stop block (9); Space for placing wire is below space for placing catheter.

2. The clip for a guide wire catheter according to claim 1, wherein End of separating block (8) close to stop block (9) is formed with arc-shaped guide surface.

3. The clip for a guide wire catheter according to claim 1, wherein Top of stop block (9) extends from bottom to top to direction close to first chuck (2).

4. The clip for a guide wire catheter according to claim 1, wherein Upper clamping table (10) and lower clamping table (11) are provided on side wall of first chuck (2) and second chuck (3) close to each other, two upper clamping tables (10) are correspondingly provided with second clamping portion (5), and two lower clamping tables (11) are correspondingly provided with first clamping portion (4); Thickness of lower clamping table (11) on first chuck (2) is greater than thickness of upper clamping table (10), and thickness of lower clamping table (11) on second chuck (3) is greater than thickness of upper clamping table (10).

5. The clip for a guide wire catheter according to claim 4, wherein Thickness of lower clamping table (11) on first chuck (2) or second chuck (3) is greater than thickness of upper clamping table (10) by 0.7mm-0.8mm.

6. The clip for a guide wire catheter according to claim 1, wherein Diameter of wire is between 0.36mm-0.9mm.

7. The clip for a guide wire catheter according to claim 1, wherein Diameter of catheter is between 1.67mm-2.67mm.

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