Patent ID: 7637922

Claim:
A calf compression device for reducing the risk of deep vein thrombosis, the device comprising: a first inflatable cuff adapted to be wrapped around the whole or part of a first calf of a human person; a second inflatable cuff adapted to be wrapped around the whole or part of a second calf of a human person; and a pump configured to inflate and deflate the first cuff and the second cuff over a regular repeating cycle, said repeating cycle comprising: a first inflation period of no more than 10 seconds wherein the first cuff is inflated to a pressure of between 40 and 70 mm mercury above ambient; a first pressure maintenance period of between 10 and 15 seconds wherein the pressure in the first cuff is maintained, the first pressure maintenance period immediately succeeding the first inflation period; a first deflation period of between 40 and 50 seconds wherein the first cuff is deflated, the first deflation period immediately succeeding the first pressure maintenance period; a second inflation period of no more than 10 seconds wherein the second cuff is inflated to a pressure of between 40 and 70 mm mercury above ambient, the second inflation period occurring within the combined first pressure maintenance period and first deflation period; a second pressure maintenance period of between 10 and 15 seconds wherein the pressure in the second cuff is maintained, the second pressure maintenance period immediately succeeding the second inflation period; a second deflation period of between 40 and 50 seconds wherein the second cuff is deflated, the second deflation period immediately succeeding the second pressure maintenance period; and a repeated first inflation period immediately succeeding the first deflation period, the repeated first inflation period occurring within the combined second pressure maintenance period and second deflation period.