Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberCA2276137 A1
Publication typeApplication
Application numberCA 2276137
PCT numberPCT/US1997/024274
Publication date9 Jul 1998
Filing date19 Dec 1997
Priority date26 Dec 1996
Also published asCA2276137C, DE69730050D1, DE69730050T2, DE69735784D1, DE69735784T2, EP0981292A1, EP0981292A4, EP0981292B1, EP1459693A2, EP1459693A3, EP1459693B1, US5910104, US6182666, US6193644, US6451012, US6475212, US20010035189, US20010037812, WO1998029029A1
Publication numberCA 2276137, CA 2276137 A1, CA 2276137A1, CA-A1-2276137, CA2276137 A1, CA2276137A1, PCT/1997/24274, PCT/US/1997/024274, PCT/US/1997/24274, PCT/US/97/024274, PCT/US/97/24274, PCT/US1997/024274, PCT/US1997/24274, PCT/US1997024274, PCT/US199724274, PCT/US97/024274, PCT/US97/24274, PCT/US97024274, PCT/US9724274
InventorsJohn D. Dobak, Iii, Kambiz Ghaerzadeh, Xiaoyu Yu
ApplicantCryogen, Inc., John D. Dobak, Iii, Kambiz Ghaerzadeh, Xiaoyu Yu, American Medical Systems Gynecology, Inc., Ams Research Corporation
Export CitationBiBTeX, EndNote, RefMan
External Links: CIPO, Espacenet
Cryosurgical probe with disposable sheath
CA 2276137 A1
This invention is a disposable, sterilized sheath (20) for use on a closed loop Joule-Thomson cryosurgical probe (10), the combination of the disposable sheath (20), and the probe (10). The sheath (20) is slipped over the probe (10), thereby separating the probe (10) from the environment. The sheath has a grip (22) which fits over the handle (12) of the probe (10), and an extendible shroud (23) that can be longitudinally extended to cover tubing (18) which is attached to the handle (12). The sheath (20) has a hollow multi-lumen catheter (24) shaped and sized to fit snugly over the cannula (t4) of the probe (10). The catheter (24) is not thermally conductive, preventing transfer of heat from the ambient to the gas mixture, and preventing the freezing of tissues at undesired locations. A thermally conductive cap or tip (26) fits snugly over the cold tip (16) on the probe (12) and it efficiently transfers heat from the target tissue to the cold tip (16), which in turn transfers heat to the expanded gas mixture. Various forms of auxiliary instrumentation can be mounted on the catheter (24) or conductive tip (16), such as a temperature sensor, a heater, an ultrasonic transducer, or an optical element of a viewing illumination or laser system. Connections between the instrumentation near the distal end of the catheter (24) and the probe (10) are made via a plurality of lumens passing longitudinally through the wall of the catheter (24).
Description  available in
Claims  available in
Legal Events
12 Aug 2002EEERExamination request
31 Jan 2015MKLALapsed
Effective date: 20141219