The amount of He in the spirometer is known at the beginning of the test ( concentration ?volume = amount ).
12.
A smoked cylinder could have been used in a spirometer, to record the volume of exhaled air, indexing lung capacity.
13.
This technique is a closed-circuit system where a spirometer is filled with a mixture of helium ( He ) and oxygen.
14.
An "'incentive spirometer "'is a medical device used to help patients improve the functioning of their lungs.
15.
A spirometer is a device used to measure timed expired and inspired volumes, and can be used to help diagnose occupational asthma.
16.
The incentive spirometer is also issued to patients recovering from pneumonia or rib damage to help minimize the chance of fluid build-up in the lungs.
17.
The validation of the method was obtained by comparing the lung volume changes obtained by Volumetric and Flow measuring Spirometers and chest wall total volumes by optoelectronic plethysmography during different maneuvers.
18.
When a known air volume is inhaled and measured with a spirometer, a volume-motion relationship can be established as the sum of the abdominal and rib cage displacements.
19.
In earlier work in pulmonology in the 1950s, Stead and H . S . Wells devised the Stead-Wells spirometer, which is used to measure pulmonary function in lung patients.
20.
He was a constructor of scientific instruments of which several had considerable practical importance, " e . g . " the spirometer and the apparatus for measuring basal metabolic rate.
