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A man undergoing whole body plethysmography. A modern body plethysmograph using ultrasound. A plethysmograph is an instrument for measuring changes in volume within an organ or whole body (usually resulting from fluctuations in the amount of blood or air it contains).
A photoplethysmogram (PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. [1] [2] A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. [3]
Second, medical roots generally go together according to language, i.e., Greek prefixes occur with Greek suffixes and Latin prefixes with Latin suffixes. Although international scientific vocabulary is not stringent about segregating combining forms of different languages, it is advisable when coining new words not to mix different lingual roots.
The principles of plethysmography were first applied to the measurement of the body volume and composition of infants in the early 1900s, but it was not until the 1960s that relatively stable measurements were achieved.
high-velocity lead therapy (facetious term for gunshot wound) Hx: history (of) This page was last edited on 8 August 2024, at 23:16 ... List of medical abbreviations: H.
Subsequently, the word was used in Frank Scully's puzzle book Bedside Manna, after which time, members of the N.P.L. campaigned to include the word in major dictionaries. [ 9 ] [ 10 ] This 45-letter word, referred to as "p45", [ 11 ] first appeared in the 1939 supplement to the Merriam-Webster New International Dictionary, Second Edition .
Past medical history (see also medical history) PSI: Pneumonia severity index: PSP: phenylsulphtalein: PSS: progressive systemic sclerosis (see scleroderma) PSVT: paroxysmal supraventricular tachycardia: PT: prothrombin time physical therapy (physiotherapy) Pt. patient (from Latin patiens, meaning "one who endures" or "one who suffers") PTA
Definition page from Amy Pope's 'A medical dictionary for nurses' (1914) A medical dictionary is a lexicon for words used in medicine.The four major medical dictionaries in the United States are Mosby's Dictionary of Medicine, Nursing & Health Professions, Stedman's, Taber's, and Dorland's.