Patent ID: 7351237

Claim:
A catheter system for testing a pulmonary vein which communicates with the heart of a patient, said medical device comprising: a catheter having a distal end and a proximal end; a balloon secured to the distal end of the catheter, said balloon having a conical segment, having a wide proximal base and a narrow distal tip, wherein the tip of the conical segment is sized and dimensioned to fit within the pulmonary vein, and said tip of the conical segment is porous to fluids, and wherein the base of the conical segment is sized and dimensioned to contact the ostium of the pulmonary vein and prohibit entry of the base into the pulmonary vein, and said base of the conical segment is non-porous; and a lumen disposed within the catheter, said lumen providing a fluid pathway between the balloon and the proximal end of the catheter.