Intramedullary catheter
First Claim
Patent Images
1. A device for passing fluid through bone, comprising:
- an elongated tubular conduit insertable into said bone and having a distal end and a proximal end with threads extending along said conduit from said distal end to said proximal end;
a conical head attached to the proximal end of said conduit, said head having an internal saucer cavity for receiving a needle placed therein;
rotating means releasably attachable to said head for inserting said distal end through said bone and into underlying bone marrow; and
seal means adapted to retain a sealing member on said head and over said cavity for permitting repetitive insertion of said needle through said sealing member and into said cavity to pass fluid between said needle and said bone marrow, and to seal the conduit after withdrawal of the needle to prevent infection from entering the bone marrow.
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Abstract
A method and device for use in delivering or withdrawing fluid to or from the vascular system of bone marrow, wherein a tubular conduit is inserted into bone and fluid is delivered or withdrawn to or from a reservoir through a seal means surrounding a head attached to one end of the conduit in communication with bone marrow at the opposite end of the conduit. Access to bone marrow is achieved by implanting an improved intramedullary catheter of the present device within a bone and creating a reusable passage via a conduit placed between bone marrow and the outer surface of bone or skin.
304 Citations
23 Claims
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1. A device for passing fluid through bone, comprising:
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an elongated tubular conduit insertable into said bone and having a distal end and a proximal end with threads extending along said conduit from said distal end to said proximal end; a conical head attached to the proximal end of said conduit, said head having an internal saucer cavity for receiving a needle placed therein; rotating means releasably attachable to said head for inserting said distal end through said bone and into underlying bone marrow; and seal means adapted to retain a sealing member on said head and over said cavity for permitting repetitive insertion of said needle through said sealing member and into said cavity to pass fluid between said needle and said bone marrow, and to seal the conduit after withdrawal of the needle to prevent infection from entering the bone marrow. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device adapted for passing fluid to and from a patient'"'"'s bone marrow, comprising:
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an elongated tubular conduit having a distal end and a proximal end with self-tapping, buttress threads extending along the outer surface of said conduit from said distal end to said proximal end; a converging, cutting tip attached to said distal end; a head having opposed conically shaped first side and saucer shaped second side, said conically shaped first side attached to the proximal end of said conduit; rotating means attachable to said head for rotatably inserting said cutting tip into said bone to form a bore through which said distal end is placed within said bone marrow and said first side is placed against the surface of skin overlying said bone when said conduit is fully inserted; means placed on the conduit to sealingly butt against the surface of said bone adjacent said bore when said distal end is fully inserted into said bone marrow; and seal means adapted to retain a silicone elastomer on said second side for permitting repetitive insertion of a needle through said elastomer and into said saucer to pass fluid to and from the conduit for transport to and from said bone marrow, said seal means also adapted for sealing the conduit after withdrawal of the needle to prevent infection from entering the bone marrow. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification