| 摘要 |
PROBLEM TO BE SOLVED: To improve the blood compatibility of a liquid feeding/branching device for medical use that feeds or branches an auxiliary flow to or from the main flow of a liquid for medical use and, at the same time, reduces the fatigue of a covering film under a compact device constitution. SOLUTION: The liquid feeding/branching device is provided with a liquid guide body 1 having at least one groove-type main pipeline 2 having opened one end and at least one auxiliary pipeline 4 reaching the main pipeline 2 and the covering film 3 arranged on the guiding body 1 on the opened side of the main pipeline 2. The film 3 is constituted to block the orifice of the auxiliary pipeline 4 to the inside of the main pipeline 2. In order to improve the blood compatibility of the device, the main pipeline 2 is constituted to prevent the occurrence of a back wash region in the orifice area of the auxiliary pipeline 4. In order to reduce the flow loss of the liquid for medical use, the portion of the auxiliary pipeline 4 positioned in the main pipeline 2 is formed in the streamline shape corresponding to the flowing direction of the main flow of the liquid in the main pipeline 2. The orifice of the auxiliary pipeline 4 is flashed with the both-side flanges of the main pipeline 2 so that the orifice may be blocked when a valve plunger 8 presses the covering film 3. |
