Method for electrosurgically obtaining access to the biliary tree with an adjustably positionable needle-knife
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United States of America Patent
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Feb 4, 1997
Issued Date -
N/A
app pub date -
May 12, 1995
filing date -
May 11, 1992
priority date (Note) -
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status (Latency Note)
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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.
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