| 摘要 |
The catheter flexible tip assembly is mounted to the distal end of a catheter body having high torque and kink resistant characteristics. The tip assembly comprises a distal end portion including a soft tubular body having a wire coil embedded therein and a transitional tip portion connected between the proximal end of the distal end portion and the distal end of the catheter body. Preferably a high stress resistant connection is provided between a distal end of the transitional tip portion and a proximal end of the distal end portion. The connection is defined by a proximal end portion of the wire coil in the distal end portion extending beyond the proximal end of the distal end portion and being received in an enlarged bore which is located at the distal end of the transitional tip portion and which is coaxial with a lumen of the catheter body and fused to the wall of the bore and by the distal end of the transitional tip portion being heat butt fused to a proximal end of the soft tubular body of the distal end portion. In another embodiment the tip assembly comprises the distal end portion and a high stress resistant connection between a distal end of the catheter body and a proximal end of the distal end portion. The connection is defined by the distal end of the catheter body being conical and being received in and heat fused to the wall of a conical cavity in the proximal end of the distal end portion.
|
