| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide advantage of a multilumen catheter with respect to easy insertion and advantage of a multiple catheter assembly which prevents potential risk of leakage at the site of vessel entry. <P>SOLUTION: A unitary portion 12 includes an exterior having a generally round or oval shape in cross section and includes at least two distal end tubes 14, 16 of generally circular cross sectional shape extending longitudinally therethrough. The catheter assembly 5 may be made by extruding a unitary tube having internal longitudinally extending lumens, then splitting the tube on its distal end portion to form distal end tubes. The tubes are then ground and polished, the finished tubes retaining in combination of the generally oval cross sectional shape of the unitary extrusion, or the finished tubes can each be finished to a circular, or other, cross sectional shape, or the finished tubes may include a combination of cross sectional shapes over its longitudinal length. <P>COPYRIGHT: (C)2010,JPO&INPIT |
