| 摘要 |
<p>PURPOSE:To reduce the danger of the destruction of a blood pressure transducer by reducing the generation of air bubbles due to the involution of air by providing the flow direction control means communicating with a bypass passage and imparting rotation to a fluid in the vicinity of a capillary tube. CONSTITUTION:A capillary tube 20 is arranged so that the bypass passage formed to a housing 33 and a part of the groove part 22a of a groove 22 communicate with each other and, further, a bypass passage 26 is sealed by the outer peripheral surface 32 of the capillary tube 20 and an elastomer member 28 composed of a silicone rubber tube and a part of the capillary tube 20 is exposed to the outer peripheral surface of the housing 33 to be covered with the elastomer member 28. When the elastomer member 28 is deformed to form the bypass passage 26 at the first filling time of a liquid or at the time of the washing of the system and the removal of all bubbles, the liquid passes through the bypass passage 26 and the bypass passage 21 of the housing 33 from the second flow path to successively advance through the groove parts 22a, 22b, 22c, 22d, 22e of the groove 22 and forcibly flows in a fixed direction while rotates along an inner wall 24. As a result, the generation of turbulent flow at the time of flash operation is reduced and the generation of air bubbles due to the involution of air is reduced and the destruction of a blood pressure transducer can be prevented.</p> |
