Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1995-05-12
1997-02-04
Green, Randall L.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
604 53, 604 93, 604164, 604264, 128658, A61M 3100
Patent
active
055993001
ABSTRACT:
A method of electrosurgically obtaining access to the biliary tree of a patient and visualizing a duct thereof using a catheter having at least a first lumen and a second lumen defined therethrough, each lumnen terminating in an opening defined at a distal end of the catheter, the first lumen of the catheter having a needle-knife disposed therein and the second lumen of the catheter enabling infusion of a contrast medium to visualize the duct of the patient while the needle-knife remains in the first lumen of the catheter, the needle-knife having a distal end and being connected to a deployment mechanism at a proximal end of the catheter for extending and retracting the needle-knife between a deployed position and a fully sheathed position relative to the distal end of the catheter, the deployment mechanism having an adjustable stop for adjusting the distance between the distal end of the needle-knife and the distal end of the catheter, the needle-knife electrically communicating with a power source to enable the operator to electrosurgically incise tissue in the duct of the patient.
REFERENCES:
patent: 5167239 (1992-12-01), Cohen et al.
patent: 5224931 (1993-07-01), Kumar
patent: 5336176 (1994-08-01), Yoon
patent: 5423809 (1995-06-01), Klicek
patent: 5425705 (1995-06-01), Evard
Holsinger Damond C.
Jacob Harold
Leighton David F.
Weaver George W.
Arrow Precision Products, Inc.
Green Randall L.
Van Over Perry E.
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