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US 4,909,979 AGranted
Method for making a vascular graft
AssigneePossis Medical, Inc.
InventorsZinon C. Possis, Demetre M. Nicoloff
Life of this patent
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AssigneePossis Medical, Inc.
InventorsZinon C. Possis, Demetre M. Nicoloff
Estimating the term…
A mandrel assembly supports an umbilical cord during the shaping and curing of the cord for use as a vascular graft. The mandrel assembly has a pair of mandrel members adapted to be releasably connected in end-to-end relation. Adjacent end sections of the mandrel members have reduced cross sectional shapes to provide the graft with a throat to restrict the flow of blood through the vascular graft. Each mandrel member has a low friction outer surface to facilitate the insertion and withdrawal of the mandrel member from the lumen of the umbilical cord. In one embodiment, the adjacent ends and neck portions of the mandrel members have small holes. A vacuum pump draws air from within the mandrel members to withdraw moisture from the tissue of the umbilical cord and hold the umbilical cord in conforming relationship with the joined mandrel members during the forming and curing of the umbilical cord.
A method of processing an umbilical cord having open opposite ends for use as a vascular graft having a section for restricting fluid flow through the graft with a mandrel assembly comprising first and second mandrel members having cooperating means to releasably connect the mandrel members together, and means for making the section for restricting fluid flow through said graft comprising:
A method of processing an umbilical cord having open opposite ends for use as a vascular graft, said vascular graft having a section having a reduced cross sectional area for controlling the flow of liquid through the graft and the pressure of the liquid in the graft, with a mandrel assembly having first and second mandrel members adapted to be releasably connected to each other, said mandrel members having elongated hollow bodies when joined together forming a neck section having a cross sectional area smaller than the cross sectional area of a body, said bodies and neck section having a plurality of holes extended therethrough, comprising:
A method of processing an umbilical cord having open opposite ends for use as a vascular graft with a mandrel assembly having first and second mandrel members adapted to be releasably connected to each other, comprising:
Dependencies are inferred from the claim text.