| 摘要 |
A tapered single (50) or multi-lumen catheter (10, 70) having an elongated cylindrical tube (28) for injection and removal of fluid, is provided with generally constant or gradually increasing diameter internal lumen or lumens (16, 18) which are connected to a tip portion (26) which may be a conical tapered tip that smoothly merges with the cylindrical surface of the tube (28) so that insertion trauma and the possibility of kinking are minimized. The catheter body is generally formed of proximal and distal portions wherein the proximal portion preferably includes a portion (30) which increases in external diameter in the proximal direction to provide a strain relief for the intersection of the catheter body (12) and the hub member (20) of the catheter. The portion of the catheter body which increases in diameter may also include one or more lumens therein which similarly increase in diameter to increase the flow of fluid therethrough or which are of constant diameter such that the outer wall (32) of the catheter body increases in thickness therealong to increase the columnar strength of the catheter body therealong.
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