Continuous passive motion apparatus

A continuous passive motion apparatus comprising:

• a base,
• a thigh support configured for supporting a thigh of a patient,
• an inflatable first bladder below the thigh support for lifting the thigh support as the first bladder is inflated and lowering the thigh support as the first bladder is deflated, and a connection between the base and the thigh support which permits the thigh support to change its angle with respect to the base as the first bladder inflates and deflates, and which also permits the thigh support to perform rectilinear movements with respect to the base;
• wherein said connection is formed as a hinge structure which comprises a first hinge connecting said thigh support to a first hinge plate, a second hinge connecting the first hinge plate to a second hinge plate, and a third hinge connecting the second hinge plate to a base plate, said first hinge, said second hinge, and said third hinge permitting the first hinge plate and the second hinge plate to collapse on top of one another sandwiched between said thigh support and said base plate;
• and further comprising a foot support connected by a cord to said thigh support at a position remote from said hinge structure so that the foot support is pulled towards said hinge structure as the first bladder inflates.