Thin wall catheter with reinforcing sleeve
AssigneeSchneider (USA) Inc.
InventorsByung H. Ju, Michael G. O'Connor, Eric M. Lovgren
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Abstract
A diagnostic catheter comprises an inner layer of substantially unmodified polyamide over which is a reinforcing means and an outer layer of polymer having a hardness of 50 Shore D to 70 Shore D, along with a suitable radiopaque filler. Affixed either directly to the end of the above tubular body or to a stem member secured to that tubular body is a soft-tip formed from a blend of PEBA whose hardness is such that the catheter can be considered as having an atraumatic tip. The resulting catheter exhibits excellent torque and column strength characteristics while providing a relatively large diameter lumen for a given outside diameter.
Claims16
An intravascular catheter comprising:
- an elongated tubular body having a proximal end, a distal end and a lumen extending therebetween, the tubular body comprising:
- (a) an inner layer consisting essentially of an unmodified polyamide polymer;
- (b) a reinforcing means at least partially surrounding the inner layer;
- and
- (c) an outer polymeric layer having a predetermined durometer hardness in the range of from about 50 Shore D to about 75 Shore D, the outer layer at least partially covering said reinforcing means.
Dependencies are inferred from the claim text.