| 摘要 |
An intra-aortic balloon system includes a balloon adapted to be disposed within an aorta and to change from a minimum volume to a maximum volume at which the balloon substantially but not entirely fills the aorta. The change in balloon volume is effected by connecting the balloon through a catheter to a slave casing cup covered by a diaphragm. The balloon, catheter and covered slave casing cup constitute a substantially closed volume filled with physiologically acceptable gas. Movement of the diaphragm portion of the closed volume produces a substantially equal volume variation of the balloon. A master casing cup is disposed against the other side of the diaphragm and is supplied with a working gas, the pressure of which is changed according to a program. Leakage of physiologically acceptable gas is detected and made up when necessary. The slave casing cup volume is changeable to match different balloons or to match the same balloon under changed operating conditions. |
