| 摘要 |
PURPOSE: To make it possible to prevent the back flow of blood by constituting a stopcock disposed in a taking-out route of an inside cylinder of a blood vessel indwelling needle in such a manner that this stopcock is closed when the inside cylinder is removed. CONSTITUTION: This blood vessel indwelling needle is provided with the stopcock 3 on the route where the inside cylinder 1 and an outside cylinder 2 enter. The back flow is suppressed by providing the needle with the stopcock 3. If the stopcock 3 is provided with an elastic material 4, a deflection is produced between this elastic material 4 and the inside cylinder 1 and the back flow route is narrowed or eliminated when a cock 5 is put into a counter-closing state, by which the inside cylinder 1 is made removable while the back flow rate is further decreased. |
