Method and apparatus for assisting vascular flow through external compression synchronized with venous phasic flow
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United States of America Patent
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Dec 29, 2009
Grant Date -
Jul 21, 2005
app pub date -
Dec 28, 2004
filing date -
Dec 29, 2003
priority date (Note) -
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Abstract
An automatic portable ambulant miniaturized system for applying pneumatic pressure to a body limb including a portable ambulant hand-held fluid source unit, a conduit for delivering fluid generated by the unit, and a pressure sleeve coupled to the conduit and adapted to envelop a body limb. The pressure sleeve contains individually inflatable cells, each cell being subdivided into longitudinally extending confluent intra-cell compartments along the axis of the body limb. The intra-cell compartments are inflated and deflated essentially simultaneously by the portable fluid source unit. To increase the peak venous velocity generated by any kind of external compressive force on a limb with any kind of tempo-spatial regime, the venous phasic flow is monitored to determine so that the venous flow generated by the external compressive force can be synchronized with the in-phasic natural venous flow.
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