Catheter having geometrically shaped surface and method of manufacture
First Claim
1. In a braided catheter having a generally elongate shaft having a proximal end and a distal end, with a lumen extending longitudinally between the proximal end and the distal end, the shaft including a first inner layer, a second braided layer carried by the first inner layer, and a third outer layer coupled to the first inner layer, the improvement comprising:
- the first inner layer having a tubular shape and formed of a polymeric material having a shore hardness of less than 72 durometer, the first inner layer including a generally circular outer surface and a geometrically configured inside surface having a plurality of longitudinal microchannels spaced radially about the inside surface, the geometrically configured inner surface allowing easy passage of a treatment device therethrough, while maximizing the inside diameter of the catheter.
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Accused Products
Abstract
Catheter and method of manufacturing such catheter. The catheter includes an elongate shaft having an interior lumen extending therethrough. The interior surface of the lumen is geometrically configured to reduce friction and increase catheter performance. Additionally, the geometrically configured inside surface allows dye or blood to perfuse past the distal end of the catheter when engaged in the coronary artery. The catheter may also include a geometrically configured outer surface at its distal end having perfusion channels to allow blood to perfuse past the distal end of the catheter during catheter engagement.
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Citations
13 Claims
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1. In a braided catheter having a generally elongate shaft having a proximal end and a distal end, with a lumen extending longitudinally between the proximal end and the distal end, the shaft including a first inner layer, a second braided layer carried by the first inner layer, and a third outer layer coupled to the first inner layer, the improvement comprising:
the first inner layer having a tubular shape and formed of a polymeric material having a shore hardness of less than 72 durometer, the first inner layer including a generally circular outer surface and a geometrically configured inside surface having a plurality of longitudinal microchannels spaced radially about the inside surface, the geometrically configured inner surface allowing easy passage of a treatment device therethrough, while maximizing the inside diameter of the catheter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A braided catheter having a generally elongate shaft having a proximal end and a distal end, with a lumen extending longitudinally between the proximal end and the distal end, the braided catheter comprising:
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a first inner layer; a second braided layer carried by the first inner layer; a third outer layer coupled to the first inner layer; and means for maximizing the diameter of the lumen including the first inner layer having a tubular shape and formed of a polymeric material having a shore hardness of less than 72 durometer, the first inner layer including a generally circular outer surface and a geometrically configured inside surface having a plurality of longitudinal microchannels spaced radially about the inside surface, the geometrically configured inner surface allowing easy passage of a treatment device therethrough, while maximizing the inside diameter of the catheter. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification