Intravascular device and method of manufacture and use

a technology of intravascular devices and manufacturing methods, applied in the direction of dilators, manufacturing tools, catheters, etc., can solve the problems of general undesirable to expose the vasculature distal, and achieve the effects of reducing or eliminating reperfusion injuries, and reducing the length of perfusion lumens

US20050245897A1Inactive Publication Date: 2005-11-03SALIENT INTERVENTIONAL SYST
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2005-11-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

An intravascular device and method of constructing an intravascular device. The device has a proximal portion which is stiffer than a distal portion. The device of the present invention may also be advanced through small vessels without the aid of a guidewire although a guidewire may be used when necessary. The device may be manufactured in a number of different ways and a preferred method is to use an expanded PTFE liner at the distal portion and an etched PTFE liner along the proximal portion. The device also has a number of different jacket sections, preferably at least four, with increasing durometer towards the proximal end and a braided section with varying pic along the length.
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Description

CROSS-REFERENCES TO RELATED APPLICATIONS

[0001] The present application is a continuation-in-part of application Ser. No. 09 / 311,903, filed May 14, 1999, which is a continuation-in-part of application Ser. No. 09 / 243,578, filed Feb. 3, 1999, which is a continuation-in-part of application Ser. No. 09 / 018,214, filed of Feb. 3, 1998, the full disclosures of which are incorporated herein by reference.BACKGROUND OF THE INVENTION

[0002] The present invention relates generally to intravascular devices and methods. Intravascular devices are used to access various areas of the vasculature for a variety of reasons. Such devices are used to deliver and withdraw fluids and to deliver other devices such as stents, angioplasty balloons and thrombolytic devices.

[0003] A specific application of the present invention is for treating acute arterial ischemia in areas such as the brain. The devices and methods of the present invention are particularly useful in connection with the devices and methods ...

Examples

Embodiment Construction

[0071] The intravascular devices and methods of construction and use are described below. The present invention is described in connection with treating partial or total occlusions but may be used for any other suitable purpose. The general principles for treating partial and total occlusions within a patient's vasculature are described in connection with FIGS. 1A-1C. A blood vessel BV which is usually an artery, more usually a cerebral artery, such as a carotid artery, vertebral artery, or an intracerebral artery, is obstructed by a total occlusion TO. The occlusion may result from thrombosis at a pre-existing atherosclerotic lesion or may result from the shedding of an embolus from an artery which flows distally to the particular vessel in which the occlusion occurs. Usually, the occlusion will occur abruptly and the sudden loss of perfusion through the blood vessel distal to the total occlusion TO will place the patient at great risk of neuron death. As discussed above in the Bac...