Abstract: There is disclosed a body parameter display device incorporated in a digital wrist watch for alternatively displaying time and a value representative of the body parameter. A pressure sensor incorporated in the device delivers an electrical output which is manipulated to deliver a signal proportional to the blood pressure sensing. In addition, the electrical pulses are manipulated to deliver a value representative of pulse rate. The pressure sensor also delivers an electrical output which is used to energize the watch and display mechanism and/or to charge a battery contained in the watch casing.

Abstract: A first pressure sensor is positioned to sense the weight of part of the patient's body in the normal position and a second pressure sensor is positioned for sensing the weight of part of a patient's body when a patient begins to leave the bed. The device also includes an alarm and a pressure responsive switch connected to the first and second sensors to energize the alarm when the patient's weight is shifted from the first pressure sensor to the second pressure sensor. Another embodiment of the invention indicates when a patient moves from a recumbent to a sitting position or raises his head from a recumbent position. A further embodiment indicates when a child gets out of bed. Another embodiment of the invention indicates when a child moves out of an area where the child is supposed to be into an area where the child is not supposed to be.