A catheter movement resistance reduction device

Abstract

The present invention relates to the technical field of medical equipment, and discloses a catheter movement drag reduction device, comprising a catheter and a drag reduction mechanism body, wherein the proximal end of the catheter of the drag reduction mechanism body is detachably connected, and the drag reduction mechanism body is used to generate vibrations perpendicular to the length direction of the catheter. The present invention has the following advantages and effects: the drag reduction mechanism body causes the catheter to vibrate vertically along the length direction of the catheter, thereby allowing the tube body to vibrate at a certain frequency and intensity, that is, the contact surface between the catheter and the tissue can be separated temporarily at a high frequency, thereby reducing the total contact area and contact pressure between the catheter and the blood vessel, which is conducive to the catheter to creep forward and turn in the elastic tissue.

Description

Technical Field

[0001] The invention relates to the technical field of medical equipment, and in particular to a catheter movement resistance reducing device. Background Art

[0002] During interventional surgery, catheters, sheaths, guidewires and other equipment are used to pass through blood vessels to reach the target area. In actual operations, blood vessel paths often have curved branches, and these equipment will also be pressed into a curved shape by the blood vessel wall. This mutual squeezing will increase the friction between the equipment and the blood vessel wall. This friction can help fix the equipment, but it will also hinder the equipment's advance, retreat and turn in the body, making it difficult to reach the target area. Some equipment chooses materials with less friction to increase passability, but its stability becomes worse. Summary of the invention

[0003] The purpose of the present invention is to provide a catheter movement resistance reduction device, which can reduce the friction between the device and the blood vessel wall when the device is moving, thereby enhancing its ability to pass through the blood vessel; when the device is not moving, the friction is restored to fully fix the device and maintain stability.

[0004] The above technical purpose of the present invention is achieved through the following technical scheme: comprising a catheter and a drag reduction mechanism body, wherein the proximal end of the catheter of the drag reduction mechanism body is detachably connected, and the drag reduction mechanism body is used to generate vibration perpendicular to the length direction of the catheter.

[0005] The present invention is further configured as follows: the drag reduction mechanism body comprises a shell, in which a power supply module, a control module, a vibration module and a fixing component are sequentially arranged, and the fixing component is detachably connected to the conduit.

[0006] The present invention is further configured as follows: the vibration module includes a sleeve fixed in the shell, a stator is symmetrically arranged in the sleeve, the stator is parallel to the axis of the sleeve, a coil is wound on the stator, the axis of the coil is perpendicular to the axis of the sleeve, the two coils are electrically connected to the power supply module through the control module, a rotor is rotatably connected in the sleeve, the two coils respectively drive the rotor to rotate in opposite directions, and a vibration arm is fixedly connected to the rotor.

[0007] The present invention is further configured as follows: the fixing assembly includes a connecting portion arranged in the shell for the catheter to be embedded, a driving plate is fixedly connected to the connecting portion, the shell is provided with a through hole for the driving plate to be embedded, the driving plate is located in the shell and connected to the vibrating arm at one end, a driving portion is provided at the connection between the driving plate and the vibrating arm, and the vibrating arm drives the connecting portion to vibrate up and down through the driving portion.

[0008] The present invention is further configured as follows: the driving part includes a gear fixedly connected to the output end of the vibration arm, and a rack is provided on the driving plate, and the rack is meshed with the gear.

[0009] The present invention is further configured as follows: the connecting portion is a C-shaped buckle, the open end of the C-shaped buckle is provided with two parallel convex strips, and the two convex strips are connected by bolts.

[0010] The present invention is further configured as follows: a reinforcing ring is provided at the junction of the conduit and the connecting portion.

[0011] The present invention is further configured as follows: the conduit is lined with a metal mesh, a metal guide bar is fixedly connected to the metal mesh, and the metal guide bar is fixedly connected to a reinforcement ring.

[0012] The present invention is further configured as follows: an operating handle is provided at the proximal end of the catheter, and the drag reduction mechanism body is provided in the operating handle or is detachably connected to the proximal end of the catheter body.

[0013] The present invention is further configured as follows: the control module is used to control the switch, amplitude and frequency of the vibration module.

[0014] The beneficial effects of the present invention are:

[0015] 1. After the solid surface of the catheter enters the body, it contacts the elastic surface of the body tissue. There are two main factors that determine its friction. One is the contact area. The longer the catheter enters the blood vessel, the larger the contact area and the greater the friction. The second is the contact pressure. The greater the curvature of the blood vessel, the greater the deformation pressure on the catheter and the greater the friction. The drag reduction mechanism makes the catheter vibrate vertically along the length of the catheter, so that the tube body can vibrate at a certain frequency and intensity, that is, the contact surface between the catheter and the tissue can be separated temporarily at a high frequency, thereby reducing the total contact area and contact pressure between the catheter and the blood vessel, which is conducive to the catheter to creep forward and turn in the elastic tissue.

[0016] 2. The vibration module consists of two symmetrically arranged stators and a rotor arranged between the two stators. When the two stators are energized, they can generate reverse magnetic attraction on the rotor. By controlling the voltage, the rotor and the vibration arm fixed on the rotor can be driven to rotate forward and reverse at high frequency. The vibration arm is connected to the connecting part through a connecting rod. The forward and reverse rotation of the vibration arm can be transmitted to the driving plate through the gear rack mechanism. The high-frequency forward and reverse rotation of the vibration arm can be converted into high-frequency up and down vibration through the gear rack mechanism. The connecting part and the conduit are tightly connected by a C-type buckle, so that the high-frequency vibration of the connecting part can be transmitted to the conduit, thereby driving the conduit to vibrate.

[0017] 3. A reinforcing ring is provided at the junction of the catheter and the connecting part. The reinforcing ring can support the catheter and prevent the catheter from being deformed under the pressure of the connecting part, which is conducive to the tight connection between the connecting part and the catheter.

[0018] 4. A metal guide strip is provided on the inner wall of the catheter, and the metal guide strip is fixedly connected to the reinforcing ring, which is beneficial to transmit the vibration of the proximal end of the catheter to the entire catheter.

[0019] 5. The switch, amplitude and frequency of the vibration module can be controlled by the control module. When the catheter passes through a bent part, resulting in difficulty in subsequent advance, retreat and turning operations, connect the drag reduction mechanism body to the proximal end of the catheter, turn on the vibration switch, adjust the vibration intensity from small to large, and observe the response of the equipment to the operation. If the response is not enough, increase the intensity level. If the response is satisfactory, continue to operate the guidewire. After reaching the predetermined target area, turn off the vibration switch, and the equipment will restore the friction between the blood vessel, making it fully fixed and ensuring its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a schematic diagram of the structure of this embodiment.

[0022] Figure 2 It is a schematic diagram of the explosion of this embodiment.

[0023] Figure 3 It is a schematic diagram of the connection relationship between the vibration module and the fixed component.

[0024] Figure 4 It is a schematic diagram of the internal structure of the vibration module.

[0025] Figure 5 It is a schematic cross-sectional view of the catheter reinforcement ring.

[0026] In the figure, 1, catheter; 2, operating handle; 3, drag reduction mechanism body; 31, shell; 32, vibration module; 321, sleeve; 322, stator; 323, coil; 324, rotor; 325, vibration arm; 33, fixing assembly; 331, connecting part; 331a, buckle; 331b, convex strip; 331c, bolt; 332, driving plate; 4, through hole; 5, driving part; 51, rack; 52, gear; 6, reinforcement ring; 7, metal guide bar. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than 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.

[0028] Embodiment: A catheter 1 moving drag reducing device, such as Figure 1 As shown, it includes a catheter 1, an operating handle 2 is provided at the proximal end of the catheter 1, a drag reduction mechanism body 3 is provided on the catheter 1, the drag reduction mechanism body 3 is detachably connected to the proximal end of the catheter 1, the drag reduction mechanism body 3 includes a shell 31, a power supply module, a control module, a vibration module 32 and a fixing component 33 are sequentially arranged in the shell 31, the fixing component 33 is detachably connected to the catheter 1, and the vibration module 32 drives the fixing component 33 to vibrate in a direction perpendicular to the length of the catheter 1.

[0029] like Figure 2 to Figure 4 As shown, the vibration module 32 includes a sleeve 321 fixed in the shell 31, and a stator 322 is symmetrically arranged in the sleeve 321. The stator 322 is parallel to the axis of the sleeve 321, and a coil 323 is wound around the stator 322. The axis of the coil 323 is perpendicular to the axis of the sleeve 321. The two coils 323 are electrically connected to the power supply module through the control module. A rotor 324 is rotatably connected in the sleeve 321. Under the action of the control module, the coil 323 alternately generates opposite attractions to the rotor 324 after being energized, thereby driving the rotor 324 to rotate back and forth continuously. A vibration arm 325 is fixedly connected to the rotor 324. The back and forth rotation of the rotor 324 can drive the vibration arm 325 to rotate forward and reverse continuously. The control module can change the rotation amplitude of the vibration arm 325 by controlling the voltage, and can change the forward and reverse switching frequency of the vibration arm 325 by controlling the positive and negative switching frequency of the voltage. The forward and reverse switching frequency of the vibration arm 325 can be adjusted within the range of 300 to 500 Hz.

[0030] like Figure 2 , Figure 3As shown, the fixing assembly 33 includes a connecting portion 331 arranged in the shell 31, and the connecting portion 331 is a C-shaped buckle 331a. Two parallel convex strips 331b are arranged at the open end of the C-shaped buckle 331a, and the two convex strips 331b are connected by a bolt 331c. The catheter 1 can be clamped in the C-shaped buckle 331a, and then the bolt 331c is tightened to lock the catheter 1 in the C-shaped buckle 331a, and the catheter 1 is tightly connected to the C-shaped buckle 331a. The outer wall of the C-shaped buckle 331a is fixedly connected with a driving plate 332, and a through hole 4 is provided on the housing 31 for the rack 51 to be embedded. The driving plate 332 is connected to the vibrating arm 325 through a driving unit 5, and the driving unit 5 includes a rack 51 arranged at one end of the driving plate 332 away from the C-shaped buckle 331a, and a gear 52 is arranged on the vibrating arm 325. When the vibrating arm 325 rotates forward and reversely, the gear 52 on the vibrating arm 325 drives the rack 51 on the driving plate 332 to vibrate up and down along the through hole 4. Through the gear 52 rack 51 mechanism, the high-frequency forward and reverse rotation of the vibrating arm 325 can be converted into the high-frequency up and down vibration of the driving plate 332, thereby driving the catheter 1 located in the C-shaped buckle 331a to vibrate at a high frequency. The figure shows a schematic diagram of the gear 52 rack 51 mechanism. In actual use, the density of the gear 52 and the rack 51 can be adjusted so that the small amplitude vibration of the vibrating arm 325 can also be accurately transmitted to the driving plate 332.

[0031] A spring can be provided at the bottom of the driving plate 332, one end of the spring is fixed at the bottom of the driving plate 332, and the other end is fixed in the shell 31. The elastic force of the spring drives the driving plate 332 to move away from the shell 31. Under the action of the spring, the driving plate 332 can return to its original position at a faster speed, thereby improving the vibration transmission effect.

[0032] like Figure 5 As shown, a reinforcing ring 6 is provided at the junction of the conduit 1 and the C-shaped buckle 331a. When the C-shaped guide bar is connected to the conduit 1, the reinforcing ring 6 can support the conduit 1 to prevent the conduit 1 from deforming. The conduit 1 is lined with a metal mesh, on which a metal guide bar 7 is fixedly connected. The metal guide bar 7 is fixedly connected to the reinforcing ring 6. The reinforcing ring 6 part vibrates under the action of the C-shaped buckle 331a, and the metal guide bar 7 connected to the reinforcing ring 6 can better transmit the vibration to the entire part of the guide bar.

[0033] The catheter 1 in the present application can be replaced by interventional surgical instruments such as a guide wire and a catheter 1 sheath.

[0034] The working principle of a device for reducing drag on the movement of a catheter 1: After the solid surface of the catheter 1 enters the body, it contacts the elastic surface of the body tissue. There are two main factors that determine its friction. One is the contact area. The longer the catheter enters the blood vessel, the larger the contact area and the greater the friction. The second is the contact pressure. The greater the curvature of the blood vessel, the greater the deformation pressure on the catheter 1 and the greater the friction. The drag reduction mechanism body 3 makes the catheter 1 vibrate vertically along the length direction of the catheter 1, so that the tube body can reach a certain frequency and intensity of vibration, that is, the contact surface of the catheter 1 and the tissue can be separated temporarily at a high frequency, thereby reducing the total contact area and contact pressure between the catheter 1 and the blood vessel, which is conducive to the catheter 1 to creep forward and turn in the elastic tissue.

[0035] The vibration module 32 is composed of two symmetrically arranged stators 322 and a rotor 324 arranged between the two stators 322. When the two stators 322 are energized, they can generate reverse magnetic attraction on the rotor 324. By controlling the positive and negative switching of the voltage, the rotor 324 and the vibration arm 325 fixed on the rotor 324 can be driven to rotate forward and reverse at high frequency. The vibration arm 325 is connected to the connecting part 331 through the driving part 5. The vibration of the vibration arm 325 can be transmitted to the connecting part 331 through the driving part 5. The connecting part 331 and the catheter 1 are tightly connected through the C-shaped buckle 331a, which can transmit the vibration to the catheter 1, thereby driving the catheter 1 to vibrate. When the catheter 1 vibrates at high frequency, the friction between the catheter 1 and the blood vessel is reduced, which is conducive to the advancement and turning of the catheter 1 in the blood vessel.

Claims

1. A device for reducing drag when moving a conduit (1), characterized in that: The invention comprises a catheter (1) and a drag reduction mechanism body (3), wherein the drag reduction mechanism body (3) is detachably connected to the proximal end of the catheter (1), and the drag reduction mechanism body (3) is used to generate vibrations perpendicular to the length direction of the catheter (1). The drag reduction mechanism body (3) comprises a shell (31), wherein a power supply module, a control module, a vibration module (32) and a fixing component (33) are sequentially arranged in the shell (31), and the fixing component (33) is detachably connected to the catheter (1). The vibration module (32) comprises a sleeve (321) fixed in the shell (31), wherein a stator (322) is symmetrically arranged in the sleeve (321), wherein the axis of the stator (322) is parallel to the axis of the sleeve (321), and a coil (323) is wound around the stator (322), wherein the axis of the coil (323) is perpendicular to the axis of the sleeve (321), and two coils are arranged on the stator (322). The coil (323) is electrically connected to the power supply module through a control module; a rotor (324) is rotatably connected in the sleeve (321); the two coils (323) respectively drive the rotor (324) to rotate in opposite directions; a vibration arm (325) is fixedly connected to the rotor (324); the fixing assembly (33) comprises a connecting portion (331) arranged in the shell (31) for the catheter (1) to be embedded; a driving plate (332) is fixedly connected to the connecting portion (331); a through hole (4) for the driving plate (332) to be embedded is provided on the shell (31); one end of the driving plate (332) is located in the shell (31) and is connected to the vibration arm (325); a driving portion (5) is provided at the connection between the driving plate (332) and the vibration arm (325); the vibration arm (325) drives the connecting portion (331) to vibrate up and down through the driving portion (5).

2. A catheter (1) movement drag reduction device according to claim 1, characterized in that: The driving part (5) comprises a gear (52) fixedly connected to the output end of the vibration arm (325); a rack (51) is provided on the driving plate (332); and the rack (51) is meshed with the gear (52).

3. A catheter (1) movement drag reduction device according to claim 1, characterized in that: The connecting portion (331) is a C-shaped buckle (331a), and the open end of the C-shaped buckle (331a) is provided with two parallel convex strips (331b), and the two convex strips (331b) are connected by a bolt (331c).

4. A catheter (1) movement drag reduction device according to claim 3, characterized in that: A reinforcement ring (6) is provided at the junction of the conduit (1) and the connecting portion (331).

5. A catheter (1) movement drag reduction device according to claim 4, characterized in that: The conduit (1) is lined with a metal mesh, a metal guide bar (7) is fixedly connected to the metal mesh, and the metal guide bar (7) is fixedly connected to the reinforcement ring (6).

6. A catheter (1) movement drag reduction device according to claim 1, characterized in that: An operating handle (2) is provided at the proximal end of the catheter (1), and the drag reduction mechanism body (3) is arranged inside the operating handle (2) or is detachably connected to the proximal end of the catheter (1).

7. A catheter (1) movement drag reduction device according to claim 1, characterized in that: The control module is used to control the switch, amplitude and frequency of the vibration module (32).

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