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Plethysmographs

Definition : Recorders designed to measure and record data and graphics (i.e., a plethysmogram) of the volume and variations in volume of organs and/or other anatomic parts that are mainly due to the presence and flow of air or blood. Some plethysmographs are intended to record the intra-thoracic or pulmonary gas volume and variations (i.e., whole body plethysmographs). Other plethysmographs are used in the determination of blood volume and flow in particular areas of the body such as the limbs, eyes, or genitals. Plethysmographs may use a variety of techniques to obtain data and graphics. The typical method used for pulmonary assessment (e.g., residual volume) consists of an airtight cabinet (known as body box) where the pressure variations are measured while the patient is breathing. Some of the techniques mostly used for blood volume and flow plethysmography are: (1) changes in volume or variations in the pulse volume waveform and amplitude (segmental plethysmography); (2) changes in the impedance; (3) changes in the optical properties of tissues (photoplethysmography). Other techniques also used are based on the variation of capacitance, inductance, and pressure using strain gauge sensors. Dedicated plethysmographs intended for assessment of the blood volume and changes in specific anatomic parts such as the limbs, eyes, brain, and genitals are available.

Entry Terms : "Recorders, Graphic" , "Recorders, Paper Chart" , "Electrorheographs" , "Recorders, Chart" , "Deep Vein Thrombosis Detectors" , "Strip-Chart Recorders" , "Graphic Recorders" , "Chart Recorders" , "Body Fluid Volume Variation Recorders" , "Organ Volume Variation Recorders"

UMDC code : 13056

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1-7 of 7 Match(es).

Braemar Inc

Company Type: Parent

Braemar builds successful OEM relationships by providing advanced technology, high reliability, and quality products and engineering services. Working closely with our customers, we develop and produce devices to their specific requirements while ensuring easy integration with their systems and applications.

D E Hokanson Inc

Company Type: Parent

D.E. Hokanson, Inc. (Hokanson) provides noninvasive diagnostic instruments of the highest quality to the medical community - manufacturing instruments with a commitment to excellence in research, materials and workmanship.

Elmed Inc

Company Type: Parent

Koven Technology Inc

Company Type: Parent

Koven Technology, Inc. is the exclusive supplier of Koven Hadeco Vascular Dopplers in the USA , Canada , and the UK . We pioneered the Koven Hadeco trademark brand Dopplers, developed according to our requirements and have worked to develop a wide variety of vascular, fetal and surgical Dopplers. Since 1981, Our goal has been to deliver safe and effective medical devices to improve patient care and the efficiency of your practice.

Pacifica USA

Company Type: Parent

UFI Corp

Company Type: Parent

UFI has been in business for more than 30 years on the California Central Coast. During that time, we have developed and built scores of different instruments for physiological research, both human and animal. Our research customers have ranged from NASA, which carried our Biolog data recorder into the depths of space, to the Scripps Institution of Oceanography, which has deployed our data loggers on penguins diving below the Antarctic ice.

Wagner Medical

Company Type: Parent

I have specialized in Sclerotherapy/Vein products for over 22 years. We have developed a web site to serve the vein, sclerotherapy, vascular and doppler medical community because my slogan has always been Hooked on Serving You

1-7 of 7 Match(es).