초록 ▼

A mass transfer device of the type used, e.g., for blood dialysis is made by winding on a mandrel a series of fiber strands, each of which consists of a solid fiber and one or more hollow fibers, the solid fiber being at least as large, and preferably substantially larger, in diameter than the hollo

A mass transfer device of the type used, e.g., for blood dialysis is made by winding on a mandrel a series of fiber strands, each of which consists of a solid fiber and one or more hollow fibers, the solid fiber being at least as large, and preferably substantially larger, in diameter than the hollow fiber. As the strands are wound on the mandrel they are temporarily anchored at spaced locations along the mandrel by beads of a liquid pre-potting compound which eventually harden into said anchor plates. When the winding is complete, the mandrel is cut at each anchor plate to form individual temporary cartridges which can withstand the handling required in washing and drying. After each individual cartridge is final-potted, the anchor plates are discarded, and the final potting is cut in a conventional manner to form manifold surfaces at each end of the cartridge. A deburring treatment is then applied to the manifold surface at each end of the cartridge to smooth out any microscopic irregularities of the manifold surface which can cause thrombogenesis.

대표청구항 ▼

In a dialysis cartridge made by winding hollow groups of one or more parallel tubular fiber membranes onto a mandrel in a criss-cross pattern, the improvement comprising at least one relatively stiff, generally solid fiber positioned to lie in said winding alongside with, and generally parallel to,

In a dialysis cartridge made by winding hollow groups of one or more parallel tubular fiber membranes onto a mandrel in a criss-cross pattern, the improvement comprising at least one relatively stiff, generally solid fiber positioned to lie in said winding alongside with, and generally parallel to, each said group of hollow fibers without being twisted therewith, said generally solid fiber is at least 80 percent as thick as said hollow fiber such that said hollow fibers lie without substantial pinching. The method of supporting and spacing easily deformable semipermeable filaments wound on a mandrel in a criss-cross pattern to form a mass transfer device, comprising the step of concurrently winding onto said mandrel, parallel to each other in a plane generally tangential to said mandrel, and without twisting them together, at least one of said easily deformable filaments and at least one relatively stiff filament; said relatively stiff filament is at least 80 percent as thick as said semipermeable filament such that said semipermeable filaments lie without substantial pinching.