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Powered traction units designed to be placed on a mobile cart that can be rolled either to a table to apply horizontal traction force or to a chair to apply vertical traction by means of harnesses attached to the cervical or lumbar vertebrae. These devices typically consist of an electrical motor and a control unit used to generate and regulate the mechanical forces and a cord (e.g., braided nylon) that is clamped to the harness and transmit the force; adjustable spreader bars, typically attached to the control unit are frequently used to vary the angle at which the cord applies the traction. Most of these units can be operated in static or intermittent modes or in variations of the intermittent mode (i.e., progressive/regressive and cyclic modes). Mobile powered traction units are used for cervical traction and also to widen the intervertebral spaces, usually for treatment of prolapsed intervertebral disks, facet joint osteoarthritis and capsulitis, and disk protrusion and/or degenerative disk diseases.
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