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Methods and devices for deep vein thrombosis prevention

  • US 9,474,673 B2
  • Filed: 11/21/2012
  • Issued: 10/25/2016
  • Est. Priority Date: 02/14/2007
  • Status: Active Grant
First Claim
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1. An ankle support device for use with a patient, the device comprising:

  • a foot support structure;

    an ankle support structure;

    a hinge connecting the foot support structure to the ankle support structure;

    a portable power supply;

    an embedded controller powered by the portable power supply;

    an actuator with an output shaft, the actuator controlled by the embedded controller;

    where the device has a free movement mode and a powered output mode;

    a first attachment for coupling the actuator to a first portion of the patient and to the ankle support structure;

    a second attachment for coupling the output shaft to a second portion of the patient and to the foot support structure;

    wherein the embedded controller contains computer readable instructions for a pre-determined limit of actuator motion and a minimum amount of time between actuator movements whereby the computer readable instructions for the pre-determined limit of actuator motion contain actuator operating instructions for execution of a pre-determined actuator flexion and extension sequence when the minimum amount of time between actuator movements has been exceeded; and

    wherein the minimum of time between actuator movements is determined by a dynamic algorithm that approximates blood flow in a leg coupled to the ankle support structure by taking into account one of a frequency of ankle movement, an intensity of active ankle movement, and the patient'"'"'s age and condition.

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