Abstract: A medical device for implantation and a TET system which includes the device as a component are provided. The device is designed so that it does not substantially restrict blood flow in the tissue surrounding the implanted device, thereby minimizing the risk of ischemia and necrosis. This enables the device to be implanted near tissue layers that are otherwise susceptible to blood flow restrictions when a device of the same volume and height is implanted. Blood flow adequate to prevent ischemia and necrosis is maintained by minimizing extravascular tissue pressure caused by the implantation of the device.

Abstract: Tissue is examined with a device that includes one or more transducer elements, each of which generates a signal in response to force imposed on the transducer element in accordance with varying properties of an underlying tissue structure as the transducer element is pressed against and moved over the tissue. The tissue examination device further includes circuitry for detecting a variation in the signals as an indication of a composition of the underlying tissue structure.