Contact area measurement apparatus for use in electrosurgery
Thermoelectrically controlled heat medical catheter Patent #: 4860744
ApplicationNo. 699994 filed on 05/13/1991
US Classes:606/20, Cyrogenic application606/21, Internal application606/23Tip or other cooling concentration means
ExaminersPrimary: Aschenbrenner, Peter A.
Attorney, Agent or Firm
Foreign Patent References
International ClassA61B 017/36
AbstractA thermoelectric cryoprobe for the topical treatment of neoplasms by freezing. The cryoprobe comprises a plurality of stacked thermoelectric modules coupled to a distal treatment tip through a heat pipe. Heat is dissipated by a heat exchanger system. An external control unit is provided which serves as a source of DC power for the hand-held cryoprobe and contains a control system for controlling the thermoelectric element based upon temperature feedback from treatment site. Temperature feedback from the sensors facilitates freeze-thaw cycling by the cryoprobe to more effectively destroy the tissue at the treatment site.