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Photoplethysmography of the thumb by off-axis digital holography. pulsatile waves on the back of a frog measured by off-axis holographic photoplethysmography Remote photoplethysmography can also be performed by digital holography , which is sensitive to the phase of light waves, and hence can reveal sub-micron out-of-plane motion.
The standard plethysmograph sizes are for the study of mice, rats and guinea pigs. On request, larger plethysmographs can also be manufactured for other animals, such as rabbits, dogs, pigs, or primates. The plethysmograph has two chambers, each fitted with a pneumotachograph. The subject is placed in one of them (subject chamber) and the other ...
Pulmonary function testing (PFT) is a complete evaluation of the respiratory system including patient history, physical examinations, and tests of pulmonary function. The primary purpose of pulmonary function testing is to identify the severity of pulmonary impairment. [1]
Penile plethysmography (PPG) or phallometry is a measurement of blood flow to the penis, typically used as a proxy for measurement of sexual arousal.The most commonly reported methods of conducting penile plethysmography involves the measurement of the circumference of the penis with a mercury-in-rubber or electromechanical strain gauge, or the volume of the penis with an airtight cylinder and ...
Air displacement plethysmography (ADP, also known as whole-body air displacement plethysmography) is a recognized and scientifically validated densitometric method to measure human body composition. ADP is based on the same principles as the gold standard method of hydrostatic weighing , but through a densitometric technique that uses air ...
A respiratory inductance plethysmograph consists of two sinusoid wire coils insulated and placed within two 2.5 cm (about 1 inch) wide, lightweight elastic and adhesive bands. The transducer bands are placed around the rib cage under the armpits and around the abdomen at the level of the umbilicus (belly button).
Clitoral photoplethysmography uses light to measure clitoral blood volume (CBV). A clitoral photoplethysmograph is a small clear acrylic device that contains a light source, and a light detector. The light source illuminates the capillary bed of the clitoral tissue and the blood circulating within it. As clitoral engorgement increases, more ...
4. J. R. T. Lewis, T. Sopwith: Three-dimensional surface measurement by microcomputer. Image Vision Comput. 4(3): 159-166 (1986) 5. Structured light Plethysmography in infants and Children – a pilot study. Juliet Usher-Smith, Richard Wareham, J Lasenby, J Cameron, P Bridge, R Iles RCPCH York 2009 Arch Dis Child 2009;94(Suppl I):A38–A40 2.