Bending-adjustable micro catheter

Abstract

The utility model discloses a bending-adjustable microcatheter, which comprises a grip mechanism, a microcatheter mechanism is fixed on the side surface of the grip mechanism, the microcatheter mechanism comprises a connecting seat fixed on the side surface of the grip mechanism, a catheter body is fixed on the side surface of the connecting seat, a support sleeve is fixed on the inner wall of the catheter body, and the support sleeve is fixed on the inner wall of the catheter body. The supporting sleeve is of a net-shaped structure, a guide sleeve is installed on the side face of the catheter body through a connecting sleeve, a fixing plate and a fixing ball are fixed in the guide sleeve, a guide wire is installed on the fixing ball, and the guide wire penetrates through the fixing plate and is inserted into the catheter body. Compared with the prior art, the device has the advantages that the grip mechanism is arranged, the first winding disc and the second winding disc are driven to rotate by the adjusting mechanism in the grip mechanism, the second pull rope can be unwound when the first pull rope is wound, the first pull rope can be unwound when the second pull rope is wound, then the fixed ball in the guide sleeve is guided to be bent, and the device is simple in structure and convenient to operate. The use is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of micro-catheters, in particular to a micro-catheter with adjustable bending. Background Art

[0002] The adjustable microcatheter is a medical device used to provide precise control and positioning in minimally invasive surgery. Its main feature is the ability to bend to accommodate different anatomical structures and surgical needs.

[0003] The existing Chinese patent "An Adjustable Microcatheter" with announcement number CN219501786U proposes to use the gears in the gear take-up box to pull the wire and then achieve the microcatheter bending operation. However, its structure is complex and the adjustment sensitivity is poor, and there are certain shortcomings in its use. For this reason, we propose an adjustable microcatheter. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a micro-catheter with adjustable bending.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A microcatheter with adjustable bending comprises a handle mechanism, a microcatheter mechanism is fixed on the side of the handle mechanism, the microcatheter mechanism comprises a connecting seat fixed on the side of the handle mechanism, a catheter body is fixed on the side of the connecting seat, a support sleeve is fixed on the inner wall of the catheter body, the support sleeve is a mesh structure, a guide sleeve is installed on the side of the catheter body through the connecting sleeve, a fixing plate and a fixing ball are fixed inside the guide sleeve, a guide wire is installed on the fixing ball, the guide wire passes through the fixing plate and is inserted into the catheter body, a first pull rope and a second pull rope are installed on both sides of the fixing plate, the first pull rope and the second pull rope both pass through the catheter body and are inserted into the interior of the handle mechanism.

[0007] Preferably, the handle mechanism includes a shell fixed on the connecting seat, a partition is fixed inside the shell, a second wire tube is fixed on the partition, the first wire tube is fixed at both ends of the side of the shell, an adjustment mechanism is installed on the top of the shell, the adjustment mechanism is inserted into the interior of the shell and is rotatably connected to the partition, and the first winding reel and the second winding reel are installed on the adjustment mechanism.

[0008] Preferably, the number of the first wire tubes is two groups, the partition is located between the two first wire tubes, the first pull rope and the second pull rope are both slidably connected to the first wire tubes, the first pull rope is wound clockwise by the first winding drum, and the second pull rope is wound counterclockwise by the second winding drum.

[0009] Preferably, the adjustment mechanism includes a shaft sleeve rotatably mounted on the top of the shell and a fixed sleeve rotatably mounted on the partition, a spline sleeve is fixed inside the fixed sleeve, an adjusting rod is slidably connected inside the shaft sleeve via a flat key, a limit block is installed on the adjusting rod, the limit block is clamped with the shell, the adjusting rod is inserted into the interior of the fixed sleeve and connected with a spline block, and the spline sleeve and the spline block are slidably connected.

[0010] Preferably, the first winding reel and the second winding reel are both fixed on a fixing sleeve.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The utility model provides a grip mechanism and utilizes the internal adjustment mechanism to drive the first winding drum and the second winding drum to rotate, so that the second draw rope can be unwound when the first draw rope is reeled in, and the first draw rope can be unwound when the second draw rope is reeled in, and then the fixed ball in the guide sleeve can be bent. The device has a simple structure and is very convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of an adjustable-bend microcatheter proposed by the utility model;

[0014] Figure 2 for Figure 1 A cross-sectional view of the middle grip mechanism;

[0015] Figure 3 for Figure 2 Cross-sectional view of the middle adjustment mechanism.

[0016] In the figure: 1 a handle mechanism, 10 a shell, 11 a partition, 12 a first wire tube, 13 a second wire tube, 14 an adjusting mechanism, 141 a sleeve, 142 an adjusting rod, 143 a limit block, 144 a fixing sleeve, 145 a spline sleeve, 146 a spline block, 15 a first winding drum, 16 a second winding drum, 2 a microcatheter mechanism, 21 a connecting seat, 22 a catheter body, 23 a supporting sleeve, 3 a connecting sleeve, 4 a guide sleeve, 5 a fixing plate, 6 a fixing ball, 7 a guide wire, 8 a first pull rope, 9 a second pull rope. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] Reference Figure 1-3A microcatheter with adjustable bend, comprising a handle mechanism 1, a microcatheter mechanism 2 is fixed to the side of the handle mechanism 1, the handle mechanism 1 comprises a shell 10 fixed to a connection seat 21, a partition 11 is fixed inside the shell 10, a second wire tube 13 is fixed on the partition 11, a first wire tube 12 is fixed at both ends of the side of the shell 10, an adjustment mechanism 14 is installed on the top of the shell 10, the adjustment mechanism 14 is inserted into the inside of the shell 10 and is rotatably connected to the partition 11, and a first receiving member 13 is installed on the adjustment mechanism 14. The reel 15 and the second reel 16, the number of the first wire tube 12 is two groups, the adjustment mechanism 14 includes a sleeve 141 rotatably mounted on the top of the housing 10 and a fixed sleeve 144 rotatably mounted on the partition 11, a spline sleeve 145 is fixed inside the fixed sleeve 144, an adjustment rod 142 is slidably connected to the inside of the sleeve 141 through a flat key, a limit block 143 is installed on the adjustment rod 142, the limit block 143 is clamped with the housing 10, and the adjustment rod 142 is inserted into the fixed sleeve 144 and connected to the spline block 145. 46, the spline sleeve 145 and the spline block 146 are slidably connected, the first winding reel 15 and the second winding reel 16 are both fixed on the fixing sleeve 144, the partition 11 is located between the two first wire tubes 12, the micro catheter mechanism 2 includes a connecting seat 21 fixed to the side of the grip mechanism 1, a catheter body 22 is fixed to the side of the connecting seat 21, a support sleeve 23 is fixed to the inner wall of the catheter body 22, and the support sleeve 23 is a mesh structure. The side of the catheter body 22 is installed with a guide sleeve 4 through the connecting sleeve 3. A fixing plate 5 and a fixing ball 6 are fixed inside the sleeve 4, and a guide wire 7 is installed on the fixing ball 6. The guide wire 7 passes through the fixing plate 5 and is inserted into the catheter body 22. A first pull rope 8 and a second pull rope 9 are installed on both sides of the fixing plate 5. The first pull rope 8 and the second pull rope 9 pass through the catheter body 22 and are inserted into the interior of the handle mechanism 1. The first pull rope 8 and the second pull rope 9 are both slidably connected to the first wire tube 12. The first pull rope 8 is wound clockwise by the first winding drum 15, and the second pull rope 9 is wound counterclockwise by the second winding drum 16.

[0019] When in use, first pull the adjusting rod 142, the adjusting rod 142 drives the limit block 143 to separate from the shell 10, rotate the adjusting rod 142 to make it rotate, the adjusting rod 142 drives the fixed sleeve 144 to rotate through the spline block 146 and the spline sleeve 145, the fixed sleeve 144 drives the first winding drum 15 and the second winding drum 16 to rotate, the first winding drum 15 winds or unwinds the first pull rope 8, and the second winding drum 16 unwinds or winds the second pull rope 9, then the first pull rope 8 and the second pull rope pull the fixed plate 5 in the guide sleeve 4 in different directions, and then adjust the direction of the fixed ball 6. At this time, the bending of the device as a whole can be adjusted as needed.

[0020] To sum up, compared with the prior art, the utility model sets a handle mechanism and utilizes the internal adjustment mechanism to drive the first winding drum and the second winding drum to rotate, so as to realize unwinding the second draw rope when winding the first draw rope, and unwinding the first draw rope when winding the second draw rope, and then realize the bending adjustment of the fixed ball in the guide sleeve. The device has a simple structure and is very convenient to use.

[0021] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A microcatheter with adjustable bend, comprising a handle mechanism (1), characterized in that: A micro-catheter mechanism (2) is fixed on the side of the handle mechanism (1), and the micro-catheter mechanism (2) includes a connecting seat (21) fixed on the side of the handle mechanism (1), a catheter body (22) is fixed on the side of the connecting seat (21), a support sleeve (23) is fixed on the inner wall of the catheter body (22), and the support sleeve (23) is a mesh structure. A guide sleeve (4) is installed on the side of the catheter body (22) through the connecting sleeve (3), and a fixing plate (5) and a fixing ball (6) are fixed inside the guide sleeve (4), and a guide wire (7) is installed on the fixing ball (6), and the guide wire (7) passes through the fixing plate (5) and is inserted into the catheter body (22). A first pull rope (8) and a second pull rope (9) are installed on both sides of the fixing plate (5), and the first pull rope (8) and the second pull rope (9) both pass through the catheter body (22) and are inserted into the inside of the handle mechanism (1).

2. The micro-catheter with adjustable bend according to claim 1, characterized in that: The handle mechanism (1) comprises a shell (10) fixed on a connecting seat (21), a partition (11) is fixed inside the shell (10), a second wire tube (13) is fixed on the partition (11), first wire tubes (12) are fixed at both ends of the side of the shell (10), an adjustment mechanism (14) is installed on the top of the shell (10), the adjustment mechanism (14) is inserted into the interior of the shell (10) and is rotatably connected to the partition (11), and a first winding reel (15) and a second winding reel (16) are installed on the adjustment mechanism (14).

3. The micro-catheter with adjustable bend according to claim 2, characterized in that: The number of the first wire tubes (12) is two groups, the partition (11) is located between the two first wire tubes (12), the first pull rope (8) and the second pull rope (9) are both slidably connected to the first wire tubes (12), the first pull rope (8) is wound clockwise by the first winding drum (15), and the second pull rope (9) is wound counterclockwise by the second winding drum (16).

4. The micro-catheter with adjustable bend according to claim 2, characterized in that: The adjusting mechanism (14) comprises a shaft sleeve (141) rotatably mounted on the top of the shell (10) and a fixed sleeve (144) rotatably mounted on the partition (11); a spline sleeve (145) is fixed inside the fixed sleeve (144); an adjusting rod (142) is slidably connected inside the shaft sleeve (141) via a flat key; a limit block (143) is mounted on the adjusting rod (142); the limit block (143) is snap-fitted with the shell (10); the adjusting rod (142) is inserted into the fixed sleeve (144) and is connected with a spline block (146); the spline sleeve (145) and the spline block (146) are slidably connected.

5. The micro-catheter with adjustable bend according to claim 4, characterized in that: The first winding reel (15) and the second winding reel (16) are both fixed on the fixing sleeve (144).

Images