oxygen monitoring 2025-09-15T10:13:15Z
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Stumbling on loose scree at 11,000 feet, my lungs suddenly turned traitor. That thin Colorado air transformed from crisp exhilaration to suffocating gauze - each gasp clawing uselessly at my throat. Panic, cold and metallic, flooded my mouth as I gripped a jagged boulder. Was this my asthma ambushing me or altitude's cruel joke? My trembling hand found salvation: the unassuming plastic rectangle of my MIR pulse oximeter, its companion app waiting silently on my phone like a digital sherpa.