A HUMAN NECESSITIES
A61 MEDICAL OR VETERINARY SCIENCE; HYGIENE
A61B DIAGNOSIS; SURGERY; IDENTIFICATION
5/00 Measuring for diagnostic purposes; Identification of persons
A61B5/02 Detecting, measuring or recording for evaluating the cardiovascular system, e.g. pulse, heart rate, blood pressure or blood flow
A61B5/026 Measuring blood flow
A61B5/0295 using plethysmography, i.e. measuring the variations in the volume of a body part as modified by the circulation of blood therethrough, e.g. impedance plethysmography