A pressure indicating ring for patients with hand pressure sense loss

Patients with loss of the sense of pressure exerted by the hand tend to hold objects with excessive pressure, leading to compression of blood vessels. This, over a period, leads to tissue necrosis due to reduction in blood circulation. To give an indication of excessive gripping pressure so that these patients can prevent hands damage, a double-layered ring has been designed when it is worn by the patient, and indication of excessive pressure is obtained in the form of change in color of a layer of liquid crystal mixture sandwiched between the two layers of the ring.<>