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Abstract

A method and apparatus to provide an improved cardiac assist by the use of a new form of intraaortic balloon are described. A single small balloon may be placed in the ascending aorta close to the aortic valve, such a placement being effective to produce a substantially stronger augmentation of heart action than with the use of a longer balloon mormally placed, for example, in the descending aorta. Multiple small balloons positioned in the aortic arch, with or without a large balloon in the descending aorta, can be used to provide even stronger coronary flows. The external diameter of the balloons in their inflated condition should in all events never be so great as to block the aorta, even when the latter may become contracted. Further improvements include an external control portion adapted to permit redirection of the assist and simultaneous and continuous measurement of blood pressure. Slidable tubular members are employed to aid in the introduction of the cardiac assist into an appropriate artery and eliminate the need for wrapping the balloon around the assist prior to inserting it. This prevents complications in the use of the assist and avoids potential insertion malfunctions such as unwrapping.

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First Claim