Patent ID: 7215988

Claim:
Sensor for the measurement of tissue perfusion where a fluid or gaseous tracer is being supplied from a tracer source via a reservoir ( 4 ) to the tissue, the perfusion and of which is to be measured, and detected by a detection device via a detection cavity ( 5 ) comprising: said reservoir ( 4 ) having a reservoir wall with a tracer-permeable reservoir wall portion that permits tracer to be supplied from the reservoir to surrounding tissue, said detection cavity having a detection cavity wall having a tracer-permeable detection cavity wall portion, said tracer-permeable reservoir wall portion and the tracer-permeable detection wall portion respectively, communicating with the surroundings, such that a part of the tracer leaving said reservoir ( 4 ) can arrive at said detection cavity ( 5 ), the reservoir and the detection cavity are mutually interspaced, elongated cavities and the tracer-permeable reservoir wall portion and the tracer permeable detection cavity wall portion are elongated side wall portions.