Method for electrosurgically obtaining access to the biliary tre

Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...

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604 53, 604 93, 604164, 604264, 128658, A61M 3100

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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

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