Unmet Need
Stroke is a leading cause of long-term disability and a major global health burden with more than 101.5 million instances of stroke occurring annually (see CDC). While the vast majority of those who experience a stroke will recover, as much as 80% of survivors will experience shoulder pain associated with muscle weakness and loss of range of motion which can progress to permanent changes in muscle structure referred to as contracture (see AHA). Following stroke, physical therapy, NSAIDs, and analgesics are used in conjunction to maintain range of motion, reduce inflammation, and build muscle tone (see UpToDate). However, the effectiveness of these treatments varies person-to-person and often requires continued maintenance of the shoulder throughout the day to prevent muscle tightening. Shoulder support and positioning can help prevent or slow the loss of range of motion but orienting the arm in beneficial positions can be difficult without objects that anchor the arm in place and there are currently no commercial products that help patients achieve comfortable levels of the correct positioning.
There is a lack of effective devices to maintain the affected shoulder of stroke patients in a position of maximum comfortable external rotation, which is crucial for preventing contractures and improving range of motion, especially in sitting and lying positions, as current solutions like pillows and sandbags are inadequate and not designed for rehabilitation outside of bed. Therefore, there is a strong need for comfortable commercial positioning devices to be developed that help survivors of stroke achieve external rotation positions to prevent loss of motion and contracture.
Technology Overview
Researchers at Johns Hopkins have designed a positioning device that positions the affected shoulder in a position that maintains maximum comfortable external rotation. The device is outfitted with pressure sensors and programmable alarms that pair with a provided software to maximize the comfort and correct positioning of the arm in the device. The device is also adjustable to meet the individual needs of patients - using a base frame with adjustable height and rotational arm support, enhancing rehabilitation outcomes and preventing contractures.
Stage of Development
Finalized designs and rough prototypes available.
Publication
Patent application
