The hypoxic profile during trekking to the Pyramid Laboratory

The oxygen saturation values reported in the high altitude literature are usually taken during a few minutes of measurement either at rest or during exercise. We aimed to investigate the daily hypoxic profile by monitoring oxygen saturation for 24h in 8 lowlanders (4 females, ages 26 to 59) during trekking from Lukla (2850m) to the Pyramid Laboratory (5050m). Oxygen saturation was measured (1) daily at each altitude (sm), (2) for 24-h during ascent to 3500m, 4200m, and on day 1 at 5050m (lm), and (3) during a standardized exercise (em). Results: (1) the sm and lm values were 90.9% (±0.5) and 86.4% (±1.1) at 3500m; 85.2%(±1.1), and 80% (±1.9) at 4200m; 83.8%(±1) and 77% (±1.7) at 5050m (p<0.05); (2) the daily time spent with oxygen saturation <90% was 56.5% at 3500m, 81% at 4200m, and 95.5% at 5050m; (3) during exercise, oxygen saturation decreased by 10.58%, 13.43%, and 11.24% at 3500, 4200, and 5050?m, respectively. In conclusion, our data show that the level of hypoxemia during trekking at altitude is more severe than expected on the basis of a short evaluation at rest and should be taken into account.
 
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Luciano Pomidori (Department of Biomedical Sciences, University of Ferrara) - Daniela Rita Bonardi (Institute of Diseases of the Respiratory System) - Federica Campigotto (Department of Cardio Thoracic and Vascular Desease, University of Milan) - Valter Fasano (Department of Cardio Thoracic and Vascular Desease, University of Milan) - Alessandra Gennari (National Institute for Cancer Research, Genoa) - Gabriele Valli (Clinical Medicine Department, Sapienza University of Rome) - Paolo Palange (Clinical Medicine Department, Sapienza University of Rome) - Annalisa Cogo (Biomedical Research Centre applied to sport, University of Ferrara) (2009) . The hypoxic profile during trekking to the Pyramid Laboratory. https://geoportal.mountaingenius.org/geonetwork/srv/api/records/01bbfa99-0638-43e6-b895-c750825b2b79
 

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2009-09-23T00:00:00
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High Altitude Medicine & Biology (2009) Volume: 10
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3
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233-237
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High Altitude Medicine & Biology (2009) Volume: 10, Issue: 3,
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1527-0297
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  • oxygen saturation , trekking , altitude , hypoxemia
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  • Lukla , the Pyramid Laboratory
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The Hypoxic Profile during Trekking to the Pyramid Laboratory.

Pomidori, L., D. Bonardi, F. Campigotto, V. Fasano, A. Gennari, G. Valli, P. Palange & A. Cogo. 2009.

High Altitude Medicine & Biology, 10(3): 233-237.

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2025-02-21T19:07:16
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