Abstract: A hollow fiber medical separatory device of the type including a shell containing a plurality of hollow semipermeable fibers extending through a central dialysate chamber and terminating in spaced apart blood chambers; the device is improved by tubesheets at each end of the fibers having the shape of a frustum of a cone and sized such that the fibers fill the cone to the peripheral edge at the outer end planar surface of the frustum; and a multi-functional blood chamber means forming a blood chamber by pressure sealing engagement with the outer tapered surface of the cone and also pressure sealed to the outer end surface of the shell to prevent air ingress into the dialysate chamber during testing or use.The invention also includes a method for potting the frusto-conical tubesheets on the end portions of the fibers while the fibers are positioned in the shell which is improved by the use of steps and means to insure centering of the fibers in the cone during centrifugal casting of the resin.

Abstract: A rinsing nozzle device is provided. The nozzle is a small, hand-held device adapted to deliver rinsing liquid into the interior of the blood chamber of a non-disassembleable artificial kidney to flush out blood clots or the like. The device provides a liquid receiving chamber in the end portion of the device from which the nozzle projects which functions to prevent splashing of the flushing liquid during use.The method for cleaning an artificial kidney for possible re-use is also disclosed.