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A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs. A spirometer measures ventilation, the movement of air into and out of the lungs. The spirogram will identify two different types of abnormal ventilation patterns, obstructive and restrictive.
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.
Francis Gano Benedict (October 3, 1870 – April 14, 1957) was an American chemist, physiologist, and nutritionist who developed a calorimeter and a spirometer used to determine oxygen consumption and measure metabolic rate. [1]
John Hutchinson was born in 1811 in Ryton, a village near Newcastle upon Tyne, where his father was a yeoman farmer and colliery manager. Hutchinson initially trained as a surgeon in the North-East, but following his father’s death in 1834, he went to London and completed his training at University College, passing the examination for MRCS in 1836.
The amount of He in the spirometer is known at the beginning of the test (concentration × volume = amount). The patient is then asked to breathe (normal breaths) in the mixture starting from FRC (functional residual capacity), which is the gas volume in the lung after a normal breath out. The spirometer measures helium concentration.
Later, he worked with Josephine Lord, a registrar, to build the Trip spirometer, later called the spirometer, whose purpose was to measure the respiratory efficiency of a newborn. [6] As well as being a diagnostic device, Donald used it to make a quantitative determination of normal respiration with the goal of determining the physiology and ...
The investigation into the killing of UnitedHealthcare CEO Brian Thompson gained steam Wednesday as law enforcement officials said a gun found in the possession of shooting suspect Luigi Mangione ...
Output of a spirometer. Vital capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume. It is approximately equal to Forced Vital Capacity (FVC). [1] [2]
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