Patent ID: 8688184

Claim:
A method of obtaining noninvasive photoplethysmographic measurements from an animal, which is a mouse or a rat, comprising the steps of: Providing a body encircling base configured to encircle one of the head, neck, chest or abdomen portion of the body of a subject animal, which is a mouse or a rat, the base including an emitter on the body configured to be mounted adjacent the subject animal, the emitter having two light sources of distinct wavelength, and a receiver on the body configured to be mounted adjacent the subject animal for detecting light from the emitter that has been toward tissue of the subject animal; Securing the base in a position encircling one of the head, neck, chest or abdomen portion of the body of a subject animal, which is a mouse or a rat; Obtaining photoplethysomgraphic measurements from the receiver on the base on the subject animal which is a mouse or a rat.