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Spirometry (meaning the measuring of breath) is the most common of the pulmonary function tests (PFTs). It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled.
The Breathometer was a small device that plugged into the audio jack of a smartphone, coupled with a dedicated app that reads the user's blood alcohol content (BAC). [8] [19] [20] [9] The app utilized the smartphone to provide the processing power, which allowed the device to be small enough to fit on a standard keychain.
He also completed accurate measures of other volume parameters by using his "Expirator". Some of the parameters he described are used today, including residual volume and vital capacity. 1846 The water spirometer measuring vital capacity was developed by a surgeon named John Hutchinson. He invented a calibrated bell inverted in water, which was ...
A fibre-optic breath rate sensor can be used for monitoring patients during a magnetic resonance imaging scan. [1] Respiration rates may increase with fever, illness, or other medical conditions. [2] Inaccuracies in respiratory measurement have been reported in the literature. [3]
A breathalyzer or breathalyser (a portmanteau of breath and analyzer/analyser), also called an alcohol meter, is a device for measuring breath alcohol content (BrAC). It is commonly utilized by law enforcement officers whenever they initiate traffic stops .
The loss of accuracy during more intense anaerobic exercise is among others due to factors including the bicarbonate buffer system. The body tries to compensate for the accumulation of lactate and minimize the acidification of the blood by expelling more CO 2 through the respiratory system. [5] The RER can exceed 1.0 during intense exercise.
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