Patent ID: 8821484

Claim:
A method of performing an ablation procedure on a patient, comprising: determining a pressure threshold range for the patient; inserting a cryoablation catheter having an expandable member at least partially within an anatomic structure, the expandable member having a proximal surface and a distal surface; expanding the expandable member and contacting the anatomic structure at a contact area; measuring a pressure difference between a first location proximal to the contact area and a second location distal to the contact area; adjusting a seal between the cryoablation catheter and the contact area till the measured pressure difference is within the predetermined threshold range indicating a complete occlusion of the anatomic structure: continuously monitoring the pressure difference during the ablation procedure; readjusting the seal between the cryoablation catheter and the contact area to maintain the pressure difference in the threshold range; and providing an aural indication when the pressure difference drops below the threshold range, wherein providing the aural indication includes setting a time offset between the pressure drop below the threshold range and the aural indication.