| 摘要 |
<p>PURPOSE:To easily prevent the damage of a capillary tube by preventing the deformation thereof, by containing the capillary tube to which a through-hole having a fine inner diameter is formed and the outer cylindlical member externally fitted to the capillary tube and forming the capillary tube from a resin material while forming the outer cylindrical member from a material harder than that of the capillary tube. CONSTITUTION:A physiological saline solution flows from a dripping pipe 14 through a tube 16 under the head pressure corresponding to the height thereof to be introduced into a control apparatus 18 from an inlet passage 44 and limited to a predetermined low flow rate from a capillary tube 54 to be injected in the blood vessel of a patient 28 from a catheter 26 through tubes 20, 24. During this process, the blood pressure of the patient 28 is detected by a pressure transducer 30 to be displayed on a display and recording apparatus 32. Since a tubular body 50 is constituted by externally fitting an outer cylindrical member 52 made of stainless steel to the capillary tube 54 made of a resin, there is no possibility such that the capillary tube 54 generates deformation even when external force acts on a tube member 40. Therefore, the inner diameter of the capillary tube 54 can always secure a predetermined dimension and the blood pressure of the patient 28 can be measured with good accuracy. Further, the tubular body 50 is not broken and handling work becomes simple.</p> |
