[Estimation of arterial oxygen saturation in relation to altitude]
| Autor: | Alma García-Espot, Guillermo Perez-Aguilar, Daniel Dols-Alonso, Sergio Benabarre-Ciria, Julia Blasco-Romero, Juan Luis Mendia-Gorostidi, Teófilo Lorente-Aznar |
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| Rok vydání: | 2016 |
| Předmět: |
Adult
Male medicine.medical_specialty Percentile 030204 cardiovascular system & hematology Altitude Sickness Logistic regression 03 medical and health sciences 0302 clinical medicine Altitude Reference Values Statistics medicine Humans 030212 general & internal medicine Oximetry Altitude sickness Normal range Related factors medicine.diagnostic_test business.industry Arteries Middle Aged medicine.disease Normal limit Surgery Oxygen Pulse oximetry Cross-Sectional Studies Logistic Models Female business Biomarkers |
| Zdroj: | Medicina clinica. 147(10) |
| ISSN: | 1578-8989 |
| Popis: | Background and objectives Arterial oxygen saturation (AOS) predicts altitude sickness. Objectives: To estimate the AOS values with relation to altitude. Furthermore, make a graph to use during activity which assesses the AOS for each altitude and the normal range. Patients and method Values of AOS were assessed during eight high mountain activities in the Alps, Himalaya, Caucasus and Andes; 53 mountaineers participated, 17 of them in more than one activity; 761 measurements of AOS were registered. Results A Logistic Regression Model was made to estimate the AOS values dependent on altitude, adjusted to possible related factors. A strong lineal relationship exists between altitude and AOS (R2 = 0.83, p The calculation of the AOS responds to the follow equation: Blood Oxygen Saturation = 103.3 − (altitude × 0.0047) + (Z), being Z = 0.7 in men and 1.4 in women. A scatter plot was made to relate the estimated altitude with the AOS, with their normal limits values: percentiles 2.5 and 97.5. Conclusions The simple calculation of the AOS estimated for a particular altitude with the proposed graphic can help in the early decision-making onsite. |
| Databáze: | OpenAIRE |
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