In-dwelling catheter
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 2, 1991
Grant Date -
N/A
app pub date -
Mar 10, 1989
filing date -
Mar 10, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A catheter intended for the administration of an anesthetic into a body space and methods of use such as introduction within the interpleural space are disclosed. According to the disclosure, the catheter is constructed so that only a soft distal portion resides within the body space. A relatively stiff portion joined to the relatively soft portion is intended to extend from the relatively soft portion through the dense body tissue to the proximal end of the catheter. A bio-compatible resin providing a softness of about 80A to 100A Rockwell is used for the relatively soft distal portion. A bio-compatible resin providing a catheter portion having a durometer value of about 65D to about 75D Rockwell is used for the relatively stiff portion. The relatively soft portion avoids damage to the delicate body tissue bounding the space whereas the relatively stiff portion resists kinking or collapse, both within the relatively stiff body tissue and outside the body. Spaced apart reference markings are provided on the relatively stiff portion of the catheter in position to provide a visual indication of the amount of the relatively soft distal portion that is within the body space.
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