منابع مشابه
Breath Alcohol Concentration and Breath Temperature
Breath alcohol concentration, breath temperature, and body temperature are used to extrapolate the breath alcohol concentration to the concentration of alcohol in the deep lung air, which is in equilibrium with the pulmonary blood. Introduction The variability that is seen in the breath alcohol test (note: “alcohol” means ethyl alcohol) has always been more or less ignored as inevitable “biolog...
متن کاملBreath-by-breath assessment of alveolar gas stores and exchange.
The volume of O(2) exchanged at the mouth during a breath (Vo(2,m)) is equal to that taken up by pulmonary capillaries (Vo(2,A)) only if lung O(2) stores are constant. The latter change if either end-expiratory lung volume (EELV), or alveolar O(2) fraction (Fa(O(2))) change. Measuring this requires breath-by-breath (BbB) measurement of absolute EELV, for which we used optoelectronic plethysmogr...
متن کاملMeasurement of breath-by-breath gas exchange during general anaesthesia.
We describe a single flow transducer breath-by-breath gas exchange measurement system suitable for use during general anaesthesia. The system uses a Fleisch No. 2 pneumotachograph, a mass spectrometer and a microcomputer to give real-time continuous measurements. Correction for apparent gas exchange attributable to changes in gas stored in the lung (functional residual capacity) is available. T...
متن کاملUpdate: shortness of breath.
D ifficulty in breathing (also known as shortness of breath, breathless-ness, or dyspnea) is caused by various mechanisms related to different problems in the body. In one's lifetime, one may experience rare episodes of shortness of breath as part of high levels of activity such as exhaustive exertion or during environmental conditions such as high altitude or very warm or cold temperatures. Ot...
متن کاملShortness of breath.
A 50 year old man presented with a one week history of general malaise, worsening shortness of breath, and a cough productive of green sputum. He had also noticed an itchy rash on his trunk and face. There was no relevant medical history and he took no regular medications. He was a nonsmoker. On examination the patient had a widespread symmetrical rash over his face, trunk, and proximal limbs; ...
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ژورنال
عنوان ژورنال: American Journal of Respiratory and Critical Care Medicine
سال: 2020
ISSN: 1073-449X,1535-4970
DOI: 10.1164/rccm.2020c7