NOTE: (The McKie Thumb Splint is required for proper use of Supination Strap. The Supination Strap Accessory does not include a McKie Thumb Splint. The McKie Thumb Splint is Sold Separately. )
McKie Supination Strap Accessory
Supination is the forearm motion that turns the palm up. Whether child or adult, it is needed for most activities of daily living including eating, cup holding, dressing, bathing, combing hair, brushing teeth and holding a pencil. Control of supination develops very early when infants begin to explore all sides of objects. It can be lost or fail to develop as a result of neurological injury. The McKie Supination Strap assists the supinator muscle in the forearm.
- Made from 1.5 mm washable nylon-covered neoprene.
- Attaches to the back of the hand on the thumb side of the hand. The strap thus also assists with wrist extension and radial deviation.
- The narrowed end attaches to the McKie thumb splint or other hand splint and the squared end of the strap encircles the upper arm and attaches to itself.
- The hook tape at the squared end of the strap is not sewn on so the strap can be trimmed if too long.
- The smooth side nylon is worn against the skin and the outer looped nylon fabric is receptive to hook tape, thus allowing considerable adaptability when attaching the strapping.
- Custom options include adding length to the strap.
Supinator Strap Sizes
- X-Small (7/8 inch x 15 inches) straps are typically needed by infants.
- Small (1 inch x 18 inches) straps fit toddlers through about 6 years.
- Medium (1-1/2 inches x 24 inches) straps fit larger children, young teens and smaller adults.
- Large (2 inches x 30 inches) straps fits most adults and older teens.
Fitting Thumb Splint and Adjustable Supinator Strap
Both the strap of the Thumb Splint and the Adjustable Supinator Strap may be shortened to accommodate different size hands or to compensate for some loss of elasticity in the straps that occurs over time.
The squared end of the supinator strap may be cut to fit a shorter or narrower forearm. Attach free piece of hook tape to the squared end of strap.
Applying Supinator Strap – Self-Attachment Above Elbow
Step 1: To attach supinator strap, undo strap from thumb splint. Reattach thumb splint over supinator strap. (figure 3)
Step 2: Wind one turn around forearm, then one turn behind elbow. Attach wider, squared hook tape end of strap to itself above elbow (figure 4). The splint is designed to assist forearm extension, so supinator strap must cut across the back of elbow.
Step 3: Once splint is in place, passively turn forearm palm up (supination) and slightly extend wrist (figure 5). Make any necessary adjustments to supinator strap to ensure a snug fit. The attachment above the elbow, while snug, should be comfortable, balancing good coloration of the hand with some pull from the strap.
Step 4: Finally, check the hand splint and, if necessary, rotate it to ensure the thumb is positioned to oppose fingers.
Always follow precautions on label regarding splint application and wear.