| 摘要 |
An air removal device removes air from blood flowing in a perfusion system. A chamber is provided having a blood flow region at a lower end thereof and having an air collection region at an upper end thereof. The chamber further has an inlet, a blood outlet, and an air outlet vertically higher than the inlet. There is a vertical guide structure in the air collection region. A float is disposed for vertical movement following the vertical guide structure, wherein the float has an effective density less than the density of blood. A lever arm having a first end follows vertical movement of the float and has a second end pivotally mounted at a pivot point that is stationary with respect to the vertical guide structure. A valve is coupled to the air outlet and to an intermediate point of the lever arm for closing the air outlet when the float is at its vertically highest position.
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