Device for selectively producing incremental joint movement in a patient in opposite directions
First Claim
1. A device for producing precise incremental joint movement in a patient, which comprises:
- first and second spaced retractors for engaging respective body parts of the patient adjacent the joint;
support means having said first and second retractors mounted thereon for relative movement;
actuating means mounted on said support means for movement relative to said support means, said actuating means being movable to cause relative movement between said first and second retractors;
operating means movably mounted on said support means for selectively causing a precise preselected incremental movement of said actuating means in either of two opposite directions for a single stroke of said operating means, to cause relative movement between said first and second retractors in the selected direction into successive incremented positions relative to said support means and one another; and
means on said support means for retaining said actuating means and said first and second retractors in their relative incremented positions.
1 Assignment
0 Petitions
Accused Products
Abstract
A device for selectively providing precise incremental joint movement in a patient in either of two opposite directions with a tactile and audible feedback "click", includes first and second spaced disposable retractors for engaging respective parts of the patient adjacent the joint. One of the retractors is mounted on a fixed, inverted, U-shaped support member, and the other retractor is mounted on a movable actuating rod slidably mounted in the support member. The device is formed entirely of non-magnetic material and is readily operable by the patient, making the device especially useful in magnetic resonance imaging procedures. An operating mechanism for the actuating rod includes a pivoted operating handle having an integral drive pawl, and a retaining mechanism for the actuating rod includes a pair of resilient retaining or holding pawls pivoted on the support member adjacent opposite sides of the drive pawl. The operating handle is pivoted on a rockable lifting lever of a retractor quick-release mechanism, so that rocking of the lifting lever raises the handle which, in turn, raises and pivots the holding pawls to release the actuating rod so that it can be readily moved by hand in either of the opposite directions.
63 Citations
30 Claims
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1. A device for producing precise incremental joint movement in a patient, which comprises:
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first and second spaced retractors for engaging respective body parts of the patient adjacent the joint; support means having said first and second retractors mounted thereon for relative movement; actuating means mounted on said support means for movement relative to said support means, said actuating means being movable to cause relative movement between said first and second retractors; operating means movably mounted on said support means for selectively causing a precise preselected incremental movement of said actuating means in either of two opposite directions for a single stroke of said operating means, to cause relative movement between said first and second retractors in the selected direction into successive incremented positions relative to said support means and one another; and means on said support means for retaining said actuating means and said first and second retractors in their relative incremented positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification