| 摘要 |
A diagnostic catheter (10) comprises a tubular body (12) having an inner layer (28) of 100 percent polyamide over which is a braided metal wire sleeve (30) and an outer layer (32) formed as a blend of either the polyamide and PEBA along with a suitable radiopaque filler or, alternatively, a blend of PEBA having different durometers. Affixed either directly to the end of the above tubular body (12) or to a stem member (34) secured to that tubular body (12) is a soft-tip (40) formed from a blend of PEBA whose hardness is such that the catheter (10) can be considered as having an atraumatic tip. The resulting catheter (10) exhibits excellent torque and column strength characteristics while providing a relatively large diameter lumen for a given outside diameter.
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