| 摘要 |
PROBLEM TO BE SOLVED: To provide a trocar catheter which enables quick closing of a punctured hole after the removal thereof, does not kink (broken to close the lumen of the catheter) and does not press the subcostal nerves even when retained in bent or twisted. SOLUTION: In the trocar catheter as a combination of a metal needle and a cannula catheter, the trocar catheter is flat in the cross section thereof and the ratio of the thickness on the long diameter side thereof to that on the short diameter side thereof ranges 30% to 70% in the flat shape. |
