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plethysmograph Syllabification: ple·thys·mo·graph
Pronunciation: /pləˈTHizməˌɡraf/

Definition of plethysmograph in English:


An instrument for recording and measuring variation in the volume of a part of the body, especially as caused by changes in blood pressure.
Example sentences
  • Lennox and coworkers found that drift of an inductive plethysmography signal was only 22% of the drift arising from changes in temperature within a body plethysmograph.
  • Lung volumes were measured in a whole-body plethysmograph, and data were expressed as a percent of the predicted values published by Goldman and Becklake.
  • Hulskamp and coworkers measured lung volume with a new plethysmograph in 32 healthy infants.


Pronunciation: /pləˌTHizməˈɡrafik/
Example sentences
  • The pulse oximeter also utilizes a plethysmographic waveform to differentiate pulsatile arterial hemoglobin saturation from venous blood.
  • Before and after training, spirometry, plethysmographic lung volumes, and carbon monoxide diffusing capacity were assessed.
  • Baseline specific airways conductance and airway responsiveness to histamine were measured using a non invasive body plethysmographic technique.
Pronunciation: /ˌpleTHizˈmäɡrəfē/
Example sentences
  • To develop an objective method for optimizing airway pressure, Habib and coworkers measured changes in lung volume using respiratory inductive plethysmography before and after lung lavage in five piglets.
  • Manipulations required for measurement of static compliance would have disrupted our measurement of respiratory inductive plethysmography.
  • Pulmonary function testing, including spirometry and whole-body plethysmography, was performed at each visit.


Late 19th century: from Greek plēthusmos 'enlargement' (based on plēthus 'fullness') + -graph.

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