Intravascular circulatory assist device
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United States of America Patent
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-
Oct 27, 1998
Grant Date -
N/A
app pub date -
Oct 31, 1996
filing date -
Oct 31, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circulatory assist device, having an outer balloon and an inner balloon, with a control space between the outer and inner balloons. The device is mounted on a catheter, collapsed to a sufficiently small diameter to allow insertion into the vascular system of a patient. An expansion mechanism in the device, such as a stent, can be expanded to hold the outer balloon in an expanded state, while control fluid is pumped into and evacuated from the control space to repeatedly collapse and expand the inner balloon. At least one port is formed in the inner balloon, to allow vascular fluid to enter and exit the inner balloon as the inner balloon expands and contracts. After use, the expansion mechanism is contracted to a smaller diameter to allow withdrawal from the vascular system.
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