Diagnostic device for measuring information on blood in a living object.

摘要

A diagnostic device is able to perform measurements on blood flow using physiological salt solution, which is harmless to living objects, as a tracer. The device is arranged to irradiate the head portion (4) of a subject alternately with laser light 1 and laser light 2, from lasers (3). The light exiting from the head portion (4) is detected and converted to an electric signal by a photomultiplier tube (6). By performing a first calculation on this electric signal, a CPU (1) outputs a signal representing the change in concentration of hemoglobin in the head (4). Further, a second calculation process is performed on the electric signal which represents changes in concentration of hemoglobin generated by injection of the physiological salt solution. At least one of the blood flow, the absolute concentration of oxyhemoglobin or deoxyhemoglobin is displayed. Because a material safe to living objects is used as the tracer, measurement of the blood flow can be safely and repeatedly performed. <IMAGE>