Travel Tips
Pulse Oximeter Nepal How to Use
A pulse oximeter is a small device that can give you an early warning of altitude-related oxygen problems. Understanding its readings prevents panic and informs decisions.
Overview
A pulse oximeter clips to your fingertip and measures blood oxygen saturation (SpO2) and heart rate using infrared light. At sea level, healthy SpO2 is 95-100 percent. At altitude, saturation drops predictably: at 3,500 metres expect 88-92 percent, at 5,000 metres 80-85 percent is typical. The device costs USD 15-30 and weighs under 50 grams — one of the best risk-management tools per gram in your pack.
Measure SpO2 each morning before getting out of bed. This resting baseline is more meaningful than readings taken after exercise. Compare readings day to day: if your saturation drops more than five points overnight despite staying at the same elevation, this signals poor acclimatisation. A resting reading below 80 percent at any elevation warrants serious concern.
Cold fingers give inaccurate readings. Warm your hands before measuring. Nail polish, particularly dark colours, can also interfere — clip to a bare nail. If readings seem inconsistent, try a different finger or warm the hand first.
The oximeter supplements clinical judgment but does not replace it. Some people tolerate lower saturations without symptoms; others feel terrible at levels others consider acceptable. Use it as one data point alongside how you actually feel. If both the device and your body are sending warning signals, descend.
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Teahouses in Namche Bazaar and other major hubs often have communal oximeters, but availability is inconsistent. Bring your own. Sajilo-level transport connectivity ends at Lukla — beyond that, personal medical equipment is your responsibility.
FAQ
Q: What SpO2 level should trigger descent?
A: Below 80 percent at rest combined with worsening symptoms (headache, confusion, breathlessness) is a strong signal to descend. Below 75 percent is a medical emergency regardless of how you feel.
Q: Do children need different SpO2 thresholds?
A: Children acclimatise similarly to adults. The same thresholds apply, though children may not articulate symptoms clearly — oximeter monitoring is especially valuable for trekking with kids.
