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Pulling wire fixing device of bendable sheathing canal

A technology of fixing devices and wires, applied in the direction of catheters, etc., can solve the problems of increased diameter of the distal end of the adjustable curved sheath, concentration of welding stress at the connection point, and low connection strength, so as to reduce the surgical wound, ensure reliable fixed connection, The effect of improving product safety

Pending Publication Date: 2019-09-10
CRYOFOCUS MEDTECH (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing technical limitations, aiming at the concentration of welding stress at the connection point, low connection strength, easy cutting of the pull wire around the fixed point, and increase in the diameter of the distal end of the adjustable curved sheath in products in the prior art field. Large and other problems, a pull-wire fixing device for adjustable curved sheath was designed

Method used

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  • Pulling wire fixing device of bendable sheathing canal
  • Pulling wire fixing device of bendable sheathing canal
  • Pulling wire fixing device of bendable sheathing canal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The invention is mainly applied in the field of bending-adjusting sheaths, and relates to a novel pull-wire fixing device for adjustable bending sheaths. Such as figure 1 As shown, the pull wire fixing device includes a pull ring 100 and a pull wire 120, the pull ring 100 is arranged at the distal end of the adjustable bend sheath, and is fixedly connected with the adjustable bend sheath, in the pull ring The tube wall of 100 is provided with a pull wire receiving groove, the distal end 121 of the pull wire 120 is placed and fixed in the pull wire receiving groove, and the proximal end 123 of the pull wire 120 extends out of the body. The main body portion 122 of the pull wire 120 is placed within the pull wire channel 110 .

[0034] Such as figure 2 with image 3 As shown, the pull wire receiving groove is divided into two parts, the first part is a straight groove 102 arranged longitudinally along the inner wall of the pull ring 100, which can only accommodate two...

Embodiment 2

[0038] Such as figure 1 , Figure 4 with Figure 5 As shown, the difference between this embodiment and the first embodiment is that the stay wire receiving groove is divided into two parts, and the first part is a straight groove 102 arranged longitudinally along the outer wall of the pull ring 100, which can only accommodate side-by-side There are two pull wires 120 , the second part is an annular groove 101 arranged along the circumferential direction of the outer wall of the pull ring 100 , which can only accommodate one pull wire 120 . The distal end 121 of the pull wire 120 enters from the straight groove 102, and ends at the straight groove 102 after going around the annular groove 101, and the proximal end 123 of the pull wire 120 extends out Outside the body, the main body 122 of the pull wire 120 is placed in the pull wire channel 110, and the pull wire channel 110 is in a cylindrical structure, and its inner diameter is slightly larger than the outer diameter of t...

Embodiment 3

[0040] Such as Image 6 with Figure 7 As shown, the difference between this embodiment and the first embodiment is that the pull ring 100 is composed of a ring pull seat 104 and a ring pull cover 105, and an annular protrusion 106 and a rectangular protrusion 107 are arranged on the ring pull cover 105 , an annular groove 101 matching the shape of the annular protrusion 106 and a straight groove 102 matching the shape of the rectangular protrusion 107 are arranged on the ring holder 104, the ring The cover 105 fixes the distal end 121 of the pull wire 120 in the annular groove 101 and the straight groove 102 provided on the pull ring seat 104 through the annular protrusion 106 and the rectangular protrusion 107 . That is, after the distal end 121 of the pull wire 120 enters along the straight groove 102, it circles around the inner wall of the annular groove 101 and places it at the inner wall of the straight groove 102, and the pull ring cover 105 is covered, and the pull w...

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Abstract

The invention relates to a pulling wire fixing device of a bendable sheathing canal. The device comprises a pulling ring and a pulling wire, the pulling ring is arranged at the far end of the bendablesheathing canal and fixedly connected with the bendable sheathing canal, and a pulling wire containing groove is formed in the pipe wall of the pulling ring; the far end of the pulling wire is fixedly placed in the pulling wire containing groove, and the near end of the pulling wire extends to the outside of the human body. The pulling wire fixing device solves the problems that by adopting a direct welding mode, the stress concentration is caused, welding spots easily shed, and the pulling wire easily fractures, and the product safety is improved.

Description

technical field [0001] The application belongs to the field of medical devices, and in particular relates to a pull wire fixing device for an adjustable curved sheath. Background technique [0002] In interventional therapy, the catheter is the most commonly used treatment consumable. Due to the complex structure of the human body, the catheter needs to meet a certain bending angle after entering the human body to better treat diseases. The current technical method is to realize the bending of the distal part of the catheter through a pull wire. The main principle is: the far end of the pull wire is directly fixed on the pull ring by welding, the proximal end of the pull wire is connected to the control system, and the pull wire is pulled by the control system to The force is transmitted to the pull wire, and the pull wire moves relatively in the axial direction of the catheter, and transmits the force to the pull ring arranged on the catheter through the welding spot, there...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00
CPCA61M25/00A61M2025/015A61M25/0147
Inventor 刁月鹏胡方坚赵奎文
Owner CRYOFOCUS MEDTECH (SHANGHAI) CO LTD
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