Chronic mountain sickness: Difference between revisions
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==Background== | ==Background== | ||
*Excessive polycythemia for a given altitude (Hgb >20) | *Excessive [[polycythemia]] for a given altitude (Hgb >20) | ||
*Occurs in | *Occurs in patients living at high-altitude who have [[COPD]], sleep apnea or impaired respiratory drive | ||
==Clinical Features== | ==Clinical Features== | ||
| Line 7: | Line 7: | ||
*Difficulty thinking | *Difficulty thinking | ||
*Impaired peripheral circulation | *Impaired peripheral circulation | ||
*Drowsiness | *[[fatigue|Drowsiness]] | ||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
{{High altitude DDX}} | {{High altitude DDX}} | ||
== | ==Evaluation== | ||
{{Expected SpO2 at altitude}} | |||
==Management== | ==Management== | ||
*Phlebotomy | *Phlebotomy | ||
*Relocation to lower altitude | *Relocation to lower altitude | ||
*Home O2 use | *Home [[O2]] use | ||
==See Also== | ==See Also== | ||
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<references/> | <references/> | ||
[[Category: | [[Category:Environmental]] | ||
Latest revision as of 19:27, 2 March 2020
Background
- Excessive polycythemia for a given altitude (Hgb >20)
- Occurs in patients living at high-altitude who have COPD, sleep apnea or impaired respiratory drive
Clinical Features
- Headache
- Difficulty thinking
- Impaired peripheral circulation
- Drowsiness
Differential Diagnosis
High Altitude Illnesses
- Acute mountain sickness
- Chronic mountain sickness
- High altitude cerebral edema
- High altitude pulmonary edema
- High altitude peripheral edema
- High altitude retinopathy
- High altitude pharyngitis and bronchitis
- Ultraviolet keratitis
Evaluation
Expected SpO2 and PaO2 levels at altitude[1]
| Altitude | SpO2 | PaO2 (mm Hg) |
|---|---|---|
| 1,500 to 3,500 m (4,900 to 11,500 ft) | about 90% | 55-75 |
| 3,500 to 5,500 m (11,500 to 18,000 ft) | 75-85% | 40-60 |
| 5,500 to 8,850 m (18,000 to 29,000 ft) | 58-75% | 28-40 |
Management
- Phlebotomy
- Relocation to lower altitude
- Home O2 use
See Also
References
- ↑ Gallagher, MD, Scott A.; Hackett, MD, Peter (August 28, 2018). "High altitude pulmonary edema". UpToDate. Retrieved May 2, 2019.