Conductive filament of titanium molybdenum alloy

A titanium-molybdenum alloy, guide wire technology, applied in catheters, guide wires, medical science and other directions, can solve the problem of difficult to reach the vascular system of patients

Inactive Publication Date: 2009-02-04
MINNESOTA MEDICAL DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shape memory makes it difficult for the surgeon to use his fingers to sh

Method used

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  • Conductive filament of titanium molybdenum alloy
  • Conductive filament of titanium molybdenum alloy

Examples

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Example Embodiment

[0030] A large number of medical procedures require the use of a guide wire in the passage of the patient. Many of these procedures involve the use of guides as guide wires within the patient's vasculature to insert catheters or other devices. The guide wire has been made of stainless steel, which has a certain degree of rigidity, but is not easy to bend in the patient's passage. Nickel-titanium alloy is also often used to make guide wires. Its flexibility and elasticity are better than stainless steel, and it also has better memory, but its rigidity is insufficient, so its pushability is not as good as stainless steel. In addition, Nitinol is not easy to bend, so its distal tip is not easy to shape.

[0031] The guide wire shown in Figure 1 is made of titanium-molybdenum alloy, and its performance is between stainless steel and nickel-titanium alloy. Compared with guide wires made of other materials, titanium-molybdenum alloy is easier to use, and has better torsion, flexibility ...

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Abstract

A guidewire for medical use such as in vascular and nonvascular systems. The guidewire made from a titanium molybdenum alloy wire with a composition of approximately 78% titanium 11.5% molybdenum 6% zirconium and 4.5% tin by weight such that it is softer than stainless steel guidewires and stiffer than NiTi alloy guidewires. The distal end of the guidewire is of a smaller diameter and softer than the proximal end and fitted with a coil for springiness such that the distal end will bend when encountering curves in the body passageways. The distal tip may be heat treated for a gradient of softness with the distal tip being the softest. The distal end may also be tapered to provide an additional gradient of softness. A distal tip on the distal end of the guidewire protects the wall of the passageway from being punctured as the guidewire travels through the passageway. The resulting guidewire has properties between those of stainless steel guidewires and NiTi alloy guidewires for better torsion and stiffness characteristics.

Description

technical field [0001] The present invention relates to the field of medical devices and in particular to guidewires mainly used in intravascular procedures. Guidewires made of titanium molybdenum alloy have soft and formable tips with low kink, high torque, good tracking and high longitudinal strength. Background of the invention [0002] The main requirement for guidewires and other guides, whether they are solid guidewires or tubular members, is that they have sufficient longitudinal strength so that they can pass through the patient's passageway (such as the patient's vasculature) without kinking (kinking). ) or binding (binding) is the least likely. However, the distal segment of the guidewire must be sufficiently flexible to prevent it from damaging the blood vessel or other lumen as it is advanced. Much research has been done to improve the strength and flexibility of guidewires to make them more suitable for their intended use, but strength for advancement is the e...

Claims

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Application Information

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IPC IPC(8): A61B5/00A61M25/00
CPCA61M2025/09083A61L31/10A61M2025/09133A61M25/09A61L31/022
Inventor S·努斯
Owner MINNESOTA MEDICAL DEV
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