Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1993-05-11
1994-03-22
Rosenbaum, C. Fred
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604164, A61M 500, A61M 5178
Patent
active
052959775
ABSTRACT:
A trocar catheter includes a trocar rod having a stepped diameter distal end for use with a catheter having a stepped diameter lumen wherein the trocar is inserted into the lumen of the catheter and the trocar is used to incise a patient and install the catheter after which the trocar is removed from the lumen of the catheter. The distal end of the trocar rod is provided with a stepped coaxial bore into which a piercing point rod, a spring and a safety sleeve are assembled. The piercing point rod has a proximal small diameter portion which is press fit into a correspondingly small diameter portion of the coaxial bore in the distal end of the trocar rod. The spring is carried on the small diameter portion of the piercing point rod and biases the safety sleeve in a distal direction. The distal end of the piercing point rod has a larger diameter portion tapering to a piercing tip and the safety sleeve has a stepped inner diameter which prevents it from moving beyond a predetermined distal position covering the piercing tip. The stepped coaxial bore has a large diameter portion for receiving the safety sleeve when it is pressed proximally against the spring. A protrusion on the distal outer surface of the safety sleeve prevents the catheter from accidentally slipping off the trocar.
REFERENCES:
patent: 5066288 (1991-11-01), Deniega et al.
Cohen Herbert
Scarfone Frank A.
Turkel David
Gordon David P.
Rosenbaum C. Fred
Symbiosis Corporation
Wilkens III Frank
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