Catheter for administering a liquid agent
First Claim
1. A catheter for the administration of a liquid agent at a target site within a patient comprising:
- (A) a catheter tube terminating in proximal and distal ends and having first, second and third lumens extending therethrough and exiting through the proximal and distal ends, said distal end being adapted for location at the target site,(B) a handle having a central volume and first and second entry ports and a catheter port extending between the exterior of said handle and said central volume, the proximal end of said catheter tube being affixed in said catheter port whereby liquid agent administered through said second port to said central volume transfers through said second and third lumens to the distal end for ejection at the target site,(C) a conduit extending through said central volume and having one end terminating in said first lumen at the proximal end of said catheter tube and the other end terminating in said first entry port thereby to prevent the transfer of liquid agent from said central volume into said first lumen.
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0 Petitions
Accused Products
Abstract
A catheter for the administration of a liquid agent at a target site includes a catheter tube, a handle and a conduit that extends through a central volume formed in the handle. The catheter includes a guidewire lumen and two parallel liquid agent transfer lumens. The conduit seals into the proximal end of the guidewire lumen and to the handle at a first entry port and spans the central volume. The tube therefore prevents the transfer of any liquid agent into the guidewire lumen and provides a passageway for enabling the catheter to transfer over the guidewire. With two transfer lumens the catheter tube provides a maximum transfer flow rate while maintaining the ability of the catheter to resist kinking and bending.
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Citations
15 Claims
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1. A catheter for the administration of a liquid agent at a target site within a patient comprising:
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(A) a catheter tube terminating in proximal and distal ends and having first, second and third lumens extending therethrough and exiting through the proximal and distal ends, said distal end being adapted for location at the target site, (B) a handle having a central volume and first and second entry ports and a catheter port extending between the exterior of said handle and said central volume, the proximal end of said catheter tube being affixed in said catheter port whereby liquid agent administered through said second port to said central volume transfers through said second and third lumens to the distal end for ejection at the target site, (C) a conduit extending through said central volume and having one end terminating in said first lumen at the proximal end of said catheter tube and the other end terminating in said first entry port thereby to prevent the transfer of liquid agent from said central volume into said first lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An ERCP cannula for administering a contrast agent in the biliary tree within a patient comprising:
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(A) a catheter tube terminating in proximal and distal ends and having a guidewire lumen and first and second transfer lumens formed between the proximal and distal ends, (B) a handle with a first entry port and a catheter port spaced along a first axis, a second entry port extending along a second axis that is transverse to the first axis and a central volume coextensive with portions of the first and second axes, (C) a thin-walled tube extending along the first axis through said central volume, one end of said tube being sealed to said first entry port and the other end of said tube being located in the guidewire lumen of said catheter tube in a sealed relationship with said catheter tube, and (D) an outer seal formed about portions of the exterior of said handle at said catheter port and about portions of the exterior of catheter tube extending from said handle adjacent thereto. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification