Continuous passive motion device for upper extremity forearm therapy
First Claim
1. A continuous passive motion device for a forearm, the forearm having a longitudinal anatomical axis, comprising:
- a) an actuator including a housing and a drive means defining a rotational axis, said actuator being connected to a power source for rotating said drive means;
b) a proximal arm support member connected to said housing, and securing means adapted to secure a user'"'"'s upper arm and elbow to said proximal arm support member; and
c) a distal forearm support member attached to said drive means for rotational motion about said rotational axis, and securing means adapted to secure a user'"'"'s forearm to said distal forearm support member with a longitudinal anatomical axis of a user'"'"'s forearm substantially coincident with said rotational axis with said distal forearm support member spaced from said rotational axis so that during rotation of said distal forearm support member a user'"'"'s distal forearm undergoes pronation or supination about the rotational axis.
6 Assignments
0 Petitions
Accused Products
Abstract
A continuous passive motion (CPM) device for the synovial joints and surrounding soft tissue of the human body, more specifically to the upper extremities. The device includes an upper arm support suitably fixed to a drive actuator and a adjustable forearm support attached to the rotational center of the drive actuator so that pivotal movement of the output causes the forearm support to pivot about an axis parallel to a longitudinal axis of the forearm support. Various cuffs are provided so a patient can secure their upper arm above the elbow and the upper forearm below the elbow to the device with the actuator located either forward of or behind the elbow. The rotational motion of pronation and supination is created by aligning the rotational center of the actuator output with the anatomical rotational center of the forearm. The rotational centers are concentric to minimize stresses on the affected limb. The relative rotational motion between the upper support and forearm support creates the passive anatomical motion of pronation and supination.
82 Citations
24 Claims
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1. A continuous passive motion device for a forearm, the forearm having a longitudinal anatomical axis, comprising:
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a) an actuator including a housing and a drive means defining a rotational axis, said actuator being connected to a power source for rotating said drive means; b) a proximal arm support member connected to said housing, and securing means adapted to secure a user'"'"'s upper arm and elbow to said proximal arm support member; and c) a distal forearm support member attached to said drive means for rotational motion about said rotational axis, and securing means adapted to secure a user'"'"'s forearm to said distal forearm support member with a longitudinal anatomical axis of a user'"'"'s forearm substantially coincident with said rotational axis with said distal forearm support member spaced from said rotational axis so that during rotation of said distal forearm support member a user'"'"'s distal forearm undergoes pronation or supination about the rotational axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A continuous passive motion device for a forearm, the forearm having a longitudinal anatomical axis, comprising:
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a) a proximal arm support member including a proximal stay member and a distal stay member slidably attached at a first end portion thereof to said proximal stay member, and securing means, adapted to secure a user'"'"'s upper arm and elbow to said proximal stay member; b) an actuator including a housing and drive means defining a rotational axis, said housing being rigidly attached to an opposed end portion of said distal stay member; and c) a distal forearm support member including a distal forearm stay member attached to said drive means of said actuator for rotational motion about said rotational axis and distal forearm securing means adapted to secure a user'"'"'s forearm to said distal forearm stay member with a longitudinal anatomical axis of a user'"'"'s forearm being substantially coincident with said rotational axis, wherein during rotation of said distal forearm stay member a user'"'"'s forearm undergoes pronation or supination about the rotational axis. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A continuous passive motion device for a forearm, the forearm having a longitudinal anatomical axis, comprising:
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a) a proximal arm support member including an L-shaped stay member with a vertical section and a horizontal section and securing means adapted to secure a user'"'"'s upper arm and elbow to said L-shaped stay member; b) an actuator including a housing and a drive means defining a rotational axis, said housing being rigidly attached to said vertical section; and c) a distal forearm support member including a proximal forearm stay member drivingly connected at one end portion thereof to said drive means of said actuator and slidably connected at an opposed end portion thereof to an end portion of a distal forearm stay member, and wherein said proximal forearm stay member and said distal forearm stay member are telescopingly movable relative to one another for length adjustment, said distal forearm support member including a distal forearm cuff support connected to said distal forearm stay member adapted to firmly grip the ulna and radius styloid processes with the longitudinal anatomical axis of a user'"'"'s forearm substantially collinear with said rotational axis so that during rotation of said distal forearm stay member a user'"'"'s forearm undergoes pronation or supination about the rotational axis. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A continuous passive motion device for a forearm, the forearm having a longitudinal anatomical axis, comprising:
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a) an actuator including a housing and a drive means defining a rotational axis; b) a proximal arm support member connected to said housing, and securing means adapted to secure a user'"'"'s upper arm and elbow to said proximal arm support member; and c) a distal forearm support member attached to said drive means for rotational motion about said rotational axis, and means adapted to be gripped by a user'"'"'s hand mounted to said distal forearm support member so that a longitudinal anatomical axis of a user'"'"'s forearm is substantially coincident with said rotational axis with said distal forearm support member spaced from said rotational axis so that during rotation of said distal forearm support member a user'"'"'s distal forearm undergoes pronation or supination about the rotational axis.
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Specification