Satish Ramadhyani,Ted J. Perron,William M. Jacqmein
申请号：
US13269256
公开号：
US20130090638A1
申请日:
2011.10.07
申请国别(地区):
US
年份:
2013
代理人:
摘要：
A flexible cryoneedle usable within a medical scope that is both substantially flexible for maneuvering and positioning a distal end thereof proximate to a soft tissue and substantially rigid for penetrating the tissue. A generally concentric cryogas supply tube within the flexible cryoneedle comprises a helical heat exchange surface on an outside surface thereof, wherein the helical heat exchange surface defines a helical exhaust passage for the cryogas entering the cryogas supply tube and expanding through a Joule-Thomson orifice into an expansion chamber at the distal end of the flexible cryoneedle.
