The present invention is directed to a pre-formed retention member having an improved construction and used for anchoring or retaining a catheter within a body cavity, organ or vessel. The pre-formed retention retains a distal open end of a single body access tube against an inner body cavity wall of...http://www.google.ca/patents/US5439444?utm_source=gb-gplus-sharePatent US5439444 - Pre-formed member for percutaneous catheter
