Patent ID: 7156840
Filing Date: 2007-01-02
Classification: A61B

Abstract:
1. A cryoablation device having a pressure monitoring system, said device comprising: a refrigerant supply unit; an elongated catheter tube having a central lumen and formed with a closed distal end; a supply line having a proximal end connected to said refrigerant supply unit and a distal end disposed in said central lumen of said catheter tube and distanced from the distal end thereof to establish an expansion chamber therebetween, said supply line for delivering a refrigerant from said refrigerant supply unit to said expansion chamber for expansion therein; a return line in fluid communication with said expansion chamber for exhausting refrigerant from said expansion chamber; a first pressure sensor for measuring a supply pressure, P a second pressure sensor for measuring a return pressure, P a control unit connected to said first pressure sensor and to said second pressure sensor for using said measured pressures P