Patent ID: 8579845
Filing Date: 2013-11-12
Classification: A61M,B01D,B29C,B29L,F28D,Y10T

Abstract:
1. A capillary tube bundle sub-assembly for use in an extracorporeal blood circuit heat exchanger, the capillary tube bundle sub-assembly comprising: a substrate core defining a cylindrical outer surface having a central longitudinal axis, a first core end, a second core end opposite the first core end, and a length between the opposing core ends in a direction of the central axis; and at least one continuous fluid impermeable capillary tubing wound about the outer surface to define a plurality of layers each including a plurality of capillary segments traversing a majority of the core length from a first terminal end adjacent the first core end to an opposing second terminal end adjacent the second core end, the capillary segments of each layer being substantially circumferentially aligned relative to the central axis, wherein each successive layer is radially outward of an immediately preceding layer; wherein the plurality of layers includes a first layer disposed against the outer surface, and further wherein the continuous capillary tubing is entirely longitudinally between the first and second core ends in forming the capillary segments of the first layer; wherein an entirety of each of the capillary segments is non-parallel with the central axis; and further wherein each of the capillary segments spirals partially about the central axis in extension from the corresponding first terminal end to the corresponding second terminal end by less than 360°.