EP 3116428 A1 20170118 - PHASE SEPARATION OF CRYOGEN IN CRYOSURGICAL INSTRUMENT
Title (en)
PHASE SEPARATION OF CRYOGEN IN CRYOSURGICAL INSTRUMENT
Title (de)
PHASENTRENNUNG EINES KÄLTEMITTELS IN KRYOCHIRURGISCHEM INSTRUMENT
Title (fr)
SÉPARATION DE PHASES D'UN CRYOGÈNE DANS UN INSTRUMENT CRYOCHIRURGICAL
Publication
Application
Priority
- US 201414204175 A 20140311
- US 2014064292 W 20141106
Abstract (en)
[origin: WO2015138010A1] A cryosurgical instrument including: a shaft having a closed distal end defining an expansion chamber and a proximal end that receives an inflow of cryogen and to exhaust a flow of expanded cryogen; and a heat exchanger with a cryogen delivery tube that spirals around a core disposed along a longitudinal axis thereof. The cryogen delivery tube, where it spirals, is in fluid tight contact with the inner surface of the shaft so as to form spiraling cryogen exhaust pathways that extend along a portion of a length of the cryosurgical instrument from the distal end of the shaft. The cryogen delivery tube forces a two-phase flow of cryogen to undergo phase separation by centrifugal forces and urges the liquid phase against the external walls of the spiral coil and the outer surface of the spiral gap. Heat exchanging occurs close to the external wall of the instrument.
IPC 8 full level
A61B 18/02 (2006.01)
CPC (source: EP)
A61B 18/02 (2013.01); A61B 2018/0212 (2013.01); A61B 2018/0281 (2013.01); A61B 2018/0287 (2013.01)
Citation (search report)
See references of WO 2015138010A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2015138010 A1 20150917; CN 106456230 A 20170222; EP 3116428 A1 20170118
DOCDB simple family (application)
US 2014064292 W 20141106; CN 201480078316 A 20141106; EP 14806769 A 20141106