Dynamically compliant catheter

a catheter and dynamic technology, applied in the field of dynamically compliant catheters, can solve the problems of increased complications, undue large wound at the puncture site, and more time needed to stop bleeding, so as to minimize the hole at the entry site of the patien
US20020095117A1Inactive Publication Date: 2002-07-18WILSON ROBERT F +1
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
WILSON ROBERT F
Publication Date
2002-07-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

A catheter enabling a reduced puncture hole size into the skin and blood vessel is disclosed. In one embodiment, the catheter has an elongate body having an expandable sheath extending at least a portion of its length. A pressure constraining sheath is positioned to surround the expandable sheath, at a selected region to prevent expansion of the inner sheath at the region of the constraining sheath. In one preferred use, the constraining sheath is positioned at the puncture hole. During use, the catheter increases in cross-section by an expandable sheath expanding from a first diameter to a second diameter. However, the outer sheath does not expand, maintaining a small diameter at the puncture site.
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Description

[0001] This invention relates generally to angiography and / or particularly to an improved catheter for injecting medical fluids such as radiographic contrast fluid into living organisms.

[0002] Angiography is a procedure used in the treatment of cardiovascular conditions including abnormalities or restrictions in blood vessels of a human or animal body. During angiography, a radiographic contrast material is injected through a catheter into a vein or artery, which then passes to vascular structures in fluid communication with the vein or artery. When X-rays are passed through the region of the body into which the contrast material is injected, they are absorbed by the contrast material, providing radiographic images of the desired vascular structure(s). The images can be recorded on film or video tape and / or displayed on a fluoroscope monitor. The images can be used for many purposes, as for example diagnostics, and for operative procedures such as angioplasty, wherein a balloon is i...

Claims

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