Self-occluding catheter
First Claim
Patent Images
1. A self-occluding catheter comprising:
- a body portion having a proximal end, a distal end, at least one internal fluid conduit extending between said proximal end and said distal end and an internal transverse bore in fluid communication with said internal fluid conduit;
a spool slidably supported within said internal transverse bore of said body portion, said spool slidable between an open and a closed position; and
a biasing device adjacent said spool for resiliently urging said spool to said closed position wherein said spool substantially blocks said internal fluid conduit of said body thereby preventing fluid flow between said distal end and said proximal end of said body;
wherein a positive or a negative fluid pressure applied at said proximal end of said body portion overcomes said resilient urging provided by said biasing device on said spool to move said spool to said open position thereby permitting fluid flow between said distal end and said proximal end of said body portion, termination of said fluid pressure allowing said biasing device to return said spool to said closed position.
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Abstract
A self-occluding catheter includes a body portion for connection to extracorporeal equipment. An elongated tubular extension is provided for insertion into a body cavity. The body portion includes a resiliently biased spool supported therein which is slidable between an open and a closed position for alternately permitting and stopping the flow of blood through the catheter during a given medical procedure. The biasing device for resilient biasing the spool preferably comprises one or more magnets fixed within the body portion which generate a magnetic force for urging the magnetically polarized spool to its closed position.
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Citations
26 Claims
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1. A self-occluding catheter comprising:
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a body portion having a proximal end, a distal end, at least one internal fluid conduit extending between said proximal end and said distal end and an internal transverse bore in fluid communication with said internal fluid conduit;
a spool slidably supported within said internal transverse bore of said body portion, said spool slidable between an open and a closed position; and
a biasing device adjacent said spool for resiliently urging said spool to said closed position wherein said spool substantially blocks said internal fluid conduit of said body thereby preventing fluid flow between said distal end and said proximal end of said body;
wherein a positive or a negative fluid pressure applied at said proximal end of said body portion overcomes said resilient urging provided by said biasing device on said spool to move said spool to said open position thereby permitting fluid flow between said distal end and said proximal end of said body portion, termination of said fluid pressure allowing said biasing device to return said spool to said closed position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
an elongated tubular extension attached to said distal end of said body portion for insertion into a body cavity, said tubular extension having at least one lumen in fluid communication with said internal fluid conduit of said body portion.
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13. The self-occluding catheter of claim 12 wherein said tubular extension is releasably connected to said distal end of said body portion.
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14. The self-occluding catheter of claim 12 wherein said tubular extension is integrally formed with said distal end of said body portion.
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15. A self-occluding catheter connector for connecting a catheter to extracorporeal equipment, said catheter connector comprising:
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a body having a catheter connection end, an extracorporeal equipment connection end, at lease one internal fluid conduit extending between said catheter connection end and said extracorporeal equipment connection end and an internal transverse bore in fluid communication with said internal fluid conduct;
a spool slidably supported within said internal transverse bore between an open and a closed position; and
a biasing device adjacent said spool for resiliently urging said spool to said closed position wherein said spool substantially blocks said internal fluid conduct thereby preventing fluid flow between said catheter connection end and said extracorporeal equipment connection end, wherein a positive or a negative fluid pressure applied at said extracorporeal equipment connection end overcomes the resilient urging provided by said biasing device on said spool to slide said spool to said open position thereby permitting fluid flow between said catheter connection end and said extracorporeal equipment connection end, termination of said fluid pressure allowing said biasing device to return said spool to said closed position. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification