Nancy R Cowan

US Patent:

54892694, Feb 6, 1996

Filed:

Nov 10, 1993

Appl. No.:

8/150494

Inventors:

Brian E. Aldrich - Fitchburg MA
Nancy J. Cowan - Bloomington IN

Assignee:

Cook, Incorporated - Bloomington IN

International Classification:

A61M 25092

US Classification:

604 95

Abstract:

A hard tip drainage catheter for direct and percutaneous insertion into the cavity of a patient with the aid of a stiffening cannula and a trocar introducer stylet positioned in the passage of the drainage catheter. The drainage catheter includes a flexible elongated member with a distal portion having a hard tip thermoplastic material at the distal end thereof for introducing the catheter into the cavity of a patient without the tapered distal end being pushed, peeled, or rolled back over the stiffening cannula. The longitudinal passage of the drainage catheter about the distal end is configured with a diameter less than the remainder of the passage to form a tight fit with the stylet extended through the passage. The passage also includes a taper extending between the two diameters of the passage of which the distal end of the stiffening cannula abuts to further minimize, if not eliminate, the distal end from being pushed, peeled, or rolled back over the stiffening cannula.