| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an indwelling needle that prevents a blood backflow when an inner needle is removed and also forms a flow passage when a male lure part is connected for a transfusion, even when the indwelling needle is configured with a small number of components. <P>SOLUTION: The indwelling needle 1 includes: a cylindrical outer needle base 2 having a flow inlet 21 to which one end of the male lure part 4 is inserted and a liquid flows in via the male lure part 4 and a flow outlet 22 where the liquid flow out; and a cylindrical check valve 3 where an outer wall is arranged so as to be brought into close contact with the inner wall of the outer needle base 2, thereby to prevent the backflow of the liquid from the flow outlet 22 to the flow inlet 21. The outer needle base 2 includes projections 2a, 2b for radially pressurizing the check valve 3 to form the flow passage of the liquid on the outer peripheral side of the check valve 3 when the male lure part 4 is inserted to push and move the check valve 3 toward the flow outlet 22 side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
