BIOL 3051 Lecture Notes - Lecture 10: Chest Radiograph, Electronvolt, Methacholine
20 Apr 2020
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Respiratory complications - gas exchange is compromised since there are varying degrees of perfusion in the lungs (some regions get air, some do not). Copd: understand the clinical presentation of asthma. Chronic ambulatory asthma severe acute asthma (progression over. Whistling sound when breathing (occurs with exercise or spontaneous) Allergic rhinitis/eczema several days/hour or rapidly over 1-2 hours. Expiratory & inspiratory wheezing on auscultation (diminished sounds with severe obstruction) Hyperinflated chest with intercostals and supraclavicular retractions. Pef and/or fev1 < 50% normal predicted values. Decreased pao2 & o2 saturations (pulse oximetry) Decreased arterial/capillary co2 (normal to increased for severe obstruction) 15% or more decrease fev1 after 6 min of near max exercise. Increase feno ( > 20 ppm: child or > 25 ppm: adult) Positive methacholine challenge (pc20 fev1 < 12. 5 mg/ml) (dipiro) Asthma classification for children 0-4 years, 5-11 years (dipiro) 2 in 6 months or 4 wheezing episodes/ year lasting > 1 day.
