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MEDICAL DEVICES INCORPORATING AT LEAST ONE ELEMENT MADE FROM A PLURALITY OF TWISTED AND DRAWN WIRES AT LEAST ONE OF THE WIRES BEING A NICKEL-TITANIUM ALLOY WIRE
MEDICAL DEVICES INCORPORATING AT LEAST ONE ELEMENT MADE FROM A PLURALITY OF TWISTED AND DRAWN WIRES AT LEAST ONE OF THE WIRES BEING A NICKEL-TITANIUM ALLOY WIRE
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机译:由多个扭绞线和抽拉线组成的医疗设备,其中至少一个是镍钛合金线
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摘要
Medical devices are provided which utilize a highly flexible cable of two and preferably three or more strands of wire, at least one of which is a nickel-titanium alloy strand. The strands are twined to form a wire rope which is drawn through successive dies to reduce its diameter until the outer surface of the cable is substantially smooth. A cable of all nickel-titanium alloy strands has been found to have an improved elasticity over a superelastic nickel-titanium wire of the same diameter. The cable is used in medical devices in which increased elasticity of a wire-like element is desired. Twisted and drawn cables incorporating a strand of a radiopaque metal or alloy with one or more nickel-titanium strands may be used in devices in which radiopacity of a flexible portion of the device is desired. Twisted and drawn cables incorporating a strand of a highly electrically conductive metal or alloy with one or more nickel-titanium strands may be used in devices in which electrical conductivity of a flexible portion of the device is desired.
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