Catheter and introducer catheter having torque transfer layer and method of manufacture
AssigneeSt. Jude Medical, Atrial Fibrillation Division, Inc.
InventorsWayne Heideman, Allan Fuentes, Richard E. Stehr, Sarah Cumming
Life of this patent
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Abstract
The instant invention relates generally to catheters and to introducer catheters used to help deliver catheters or other medical devices to locations within the human body. In particular, the instant invention relates to large diameter catheters and introducer catheters having a torque transfer layer that includes at least two flat wires braided into a wire mesh. The flat wires have a width of at least about 0.007 inches and a depth of at least about 0.003 inches. The lumen diameter of the catheter is at least about 6 French. The torque transfer layer provides increased strength, flexibility, and kink resistance.
Claims26
A catheter for cardiac surgery, comprising:
- a tubular inner liner having a lumen diameter of at least about 6 French;
- a torque transfer layer surrounding at least a portion of the inner liner, the torque transfer layer comprising at least two flat wires braided into a wire mesh, the flat wires being substantially rectangular in cross-section and having a width of at least about 0.007 inches and a depth of at least about 0.003 inches;
- an outer sheath formed over to the torque transfer layer.
A method of manufacturing a catheter for cardiac surgery, comprising:
- forming a tubular inner liner about a mandrel, the liner having a proximal end, a distal end, and a lumen diameter of at least about 6 French;
- forming a torque transfer layer over at least a portion of the liner, the torque transfer layer comprising a plurality of braided flat wires, the flat wires being substantially rectangular in cross-section and having a width of at least about 0.007 inches and a depth of at least about 0.003 inches;
- forming an outer sheath about the torque transfer layer;
- and
- removing the mandrel.
Dependencies are inferred from the claim text.