Patent ID: 7811249
Filing Date: 2010-10-12
Classification: A61B,A61F,A61M

Abstract:
1. Fluid circulation catheter apparatus for circulating a heat transfer fluid along a closed path from a proximal region of said catheter apparatus, to a distal region of said apparatus, and returning said fluid to a proximal region of said apparatus, said apparatus comprising a multi-lumen catheter comprising wall portions along at least a first section of said catheter, said first section consisting essentially of an orientable thermoplastic polymer, at least a portion of which has been at least partially oriented so as to be very thin-walled, high tensile strength, flexible, readily inflatable under fluid pressure and readily collapsible under vacuum, said first section of said catheter comprising three or more first section lumens wherein at least three of said first section lumens are common-wall-sharing lumens each of which shares a common, very thin, integrally-formed wall portion with at least one adjacent common-wall-sharing lumen along at least a section of their respective axial lengths, and further wherein: (a) at least one of said common-wall-sharing lumens is a fluid inflow-lumen having inflow-lumen proximal and distal ends, an inflow-lumen fluid inlet proximate to the inflow-lumen proximal end, and an inflow-lumen fluid outlet between the inflow-lumen fluid inlet and the inflow-lumen distal end; (b) at least one of said common-wall-sharing lumens is a fluid outflow-lumen having outflow-lumen proximal and distal ends, an outflow-lumen fluid outlet proximate to the outflow-lumen proximal end, and an outflow-lumen fluid inlet between the outflow-lumen fluid outlet and the outflow-lumen distal end; and, (c) the common wall portion between said inflow-lumen and said outflow-lumen includes at least an aperture that serves as an inflow-lumen fluid outlet and an outflow-lumen fluid inlet.