US 5,738,636 A · Continuous passive motion devices for joints

Abstract

The present invention provides continuous passive motion (CPM) devices for joints. An ankle CPM device includes a lower leg support attached at its lower end to a semi-circular track. An actuator slides along the track and can be locked in any desired position on the track. A shaft is pivotally connected at one end thereof to the actuator and a shoe is attached at the other end thereof. When the actuator is positioned at the bottom of the track the ankle joint of the patient undergoes inversion/eversion motion. When the motor housing is rotated 90.degree. and positioned near the top of the track plantar/dorsi flexion movement is obtained. A combination of both types of joint movement are obtained for the actuator in intermediate positions. A wrist CPM device includes a brace for the forearm attached to a semi-circular track on which an actuator is mounted. A hand grip is mounted on a semi-circular bracket and a shaft extends between the actuator and a coupling slidably mounted on the semi-circular bracket. With the actuator positioned below the forearm, when the actuator pivots the shaft the wrist joint undergoes ulnar/radial deviation movement and when the motor is rotated 90.degree. and positioned at the side of the arm extension/flexion movement of the wrist joint is obtained. Positioning the actuator in intermediate positions produces wrist movement which is a combination of extension/flexion and ulnar/radial deviation of the wrist joint.

Claims33

Dependent claims

A device for providing continuous passive motion of an anatomical joint, comprising:

a first support member adapted to engage a first limb portion on one side of a joint;
a second support member adapted to engage a second limb portion on another side of said joint;
an actuator and a shaft with distal and proximal end portions, said shaft being pivotally movably by said actuator at said proximal end portion, said actuator being operable to pivot said shaft in sideways motion;
positioning means attached to said first support member and adapted to extend at least partially about the first limb portion, said actuator being adjustably mounted to said positioning means so that said actuator can be moved in an arcuate path relative to said joint, and locking means for releasibly locking said actuator in a selected position to said positioning means;
and
said second support member being adjustably attached at the distal end portion of said shaft so that a position of attachment of said second support member to said shaft can be adjusted responsive to the selected position of said actuator relative to the limb.

3 more elements

A device for providing continuous passive motion of a wrist joint, comprising:

an arm support member for supporting a forearm and means for securing said forearm in said arm support member;
an actuator and a shaft with distal and proximal end portions, said shaft being pivotally connected to said actuator at said proximal end portion, said actuator being operable to pivot said shaft in sideways motion, an arcuate track attached to said arm support member, said arcuate track being sized to extend at least partially around said forearm, said actuator being adjustably mounted on said arcuate track for movement in an arcuate path about said wrist joint, first locking means for releasibly locking said actuator in a preselected position to said arcuate track;
and
a hand support member including an arcuate ring, a bracket attached to said distal end portion of said shaft, said arcuate ring being adjustably mounted to said bracket so that the position of the hand support member can be adjusted responsive to positioning the actuator in order to maintain said wrist joint in a neutral position, and second locking means for locking said arcuate ring to the bracket, said bracket including resilient biasing means, said ring engaged against said resilient biasing means so the ring can flex with respect to the bracket.

1 more element

Dependencies are inferred from the claim text.

Continuous passive motion devices for joints

Life of this patent

Continuous passive motion devices for joints

Life of this patent

Abstract

Claims33