Artificial blood conduit
First Claim
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1. A blood conduit comprising:
- a flexible inner tube for conducting a flow of blood and having a porous wall for permitting the development of a biologically stable interface between the interior surface of said inner tube and blood flow therethrough, said inner tube having a convoluted wall structure for providing flexibility without kinking;
a flexible, non-porous outer tube concentrically enclosing said inner tube, for preventing contamination, said outer tube having a convoluted wall structure for providing flexibility without kinking;
rigid ring means spaced along said conduit and located concentrically between said outer tube and said inner tube for providing radial strength to said conduit; and
means affixing said ring means to said outer tube for providing said conduit with strength to resist collapse forces with axial components.
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Abstract
An artificial blood conduit comprises two concentrically associated tubes. Convolutions in the tube walls provide flexibility and reduce the tendency to kink. The inner tube is porous to promote the growth of a stable biological interface. The outer tube is impervious to prevent contamination of the blood in locations external to the host body. Rigid reinforcing rings located between the two tubes and affixed to the outer tube, provide the conduit with strength to resist collapse from a wide variety of stress forces. A Dacron cloth sewn tightly around the exterior of the conduit allows tissue fixation without puncturing the conduit. End connectors are provided for different types of anastomoses.
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Citations
5 Claims
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1. A blood conduit comprising:
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a flexible inner tube for conducting a flow of blood and having a porous wall for permitting the development of a biologically stable interface between the interior surface of said inner tube and blood flow therethrough, said inner tube having a convoluted wall structure for providing flexibility without kinking; a flexible, non-porous outer tube concentrically enclosing said inner tube, for preventing contamination, said outer tube having a convoluted wall structure for providing flexibility without kinking; rigid ring means spaced along said conduit and located concentrically between said outer tube and said inner tube for providing radial strength to said conduit; and means affixing said ring means to said outer tube for providing said conduit with strength to resist collapse forces with axial components. - View Dependent Claims (2, 3, 4, 5)
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Specification