STUDY OBJECTIVES: This study was performed to determine whether the obstructive sleep apnea patient who requires a certain CPAP pressure at one altitude requires the same or a different CPAP pressure at a different altitude. PARTICIPANTS: 7 mountain residents with OSA, comfortably using CPAP and planning to travel to lower altitude. DESIGN AND SETTING: Participants used a ResMed Autoset autotitrating CPAP unit for at least 3 days at their home and at each of their lower travel destinations. MEASUREMENTS: Nightly CPAP 95th percentile pressure, median CPAP pressure and AHI were recorded. RESULTS: At high altitude, 7400 ft. to 10,100 ft (2255 m to 3080 m), average CPAP 95th percentile pressure was 9.43 (+/- 0.12) cm H2O. At low altitude, sea level to 2800 ft. (0-853m), average CPAP 95th percentile pressure was 9.54 (+/- 0.13) cm H2O, P = 0.18. At high altitude, median CPAP pressure was 7.00 (+/- 0.10) cm H2O vs. 7.21 (+/- 0.14) cm. H20 at low altitude, P = 0.54. Three patients had a slight decrease in required pressure at low elevation, 4 had a slight increase. INTERVENTIONS: N/A. CONCLUSIONS: For obstructive sleep apnea patients living at altitude, changes in elevation between 10,100 ft (3075 m) and sea level do not significantly alter absolute CPAP pressure requirements.
STUDY OBJECTIVES: This study was performed to determine whether the obstructive sleep apneapatient who requires a certain CPAP pressure at one altitude requires the same or a different CPAP pressure at a different altitude. PARTICIPANTS: 7 mountain residents with OSA, comfortably using CPAP and planning to travel to lower altitude. DESIGN AND SETTING:Participants used a ResMed Autoset autotitrating CPAP unit for at least 3 days at their home and at each of their lower travel destinations. MEASUREMENTS: Nightly CPAP 95th percentile pressure, median CPAP pressure and AHI were recorded. RESULTS: At high altitude, 7400 ft. to 10,100 ft (2255 m to 3080 m), average CPAP 95th percentile pressure was 9.43 (+/- 0.12) cm H2O. At low altitude, sea level to 2800 ft. (0-853m), average CPAP 95th percentile pressure was 9.54 (+/- 0.13) cm H2O, P = 0.18. At high altitude, median CPAP pressure was 7.00 (+/- 0.10) cm H2O vs. 7.21 (+/- 0.14) cm. H20 at low altitude, P = 0.54. Three patients had a slight decrease in required pressure at low elevation, 4 had a slight increase. INTERVENTIONS: N/A. CONCLUSIONS: For obstructive sleep apneapatients living at altitude, changes in elevation between 10,100 ft (3075 m) and sea level do not significantly alter absolute CPAP pressure requirements.
Authors: David Patz; Mark Spoon; Richard Corbin; Michael Patz; Louise Dover; Bruce Swihart; David White Journal: Chest Date: 2006-12 Impact factor: 9.410
Authors: Katsufumi Nishida; Michael J Lanspa; Tom V Cloward; Lindell K Weaver; Samuel M Brown; James E Bell; Colin K Grissom Journal: Ann Am Thorac Soc Date: 2015-07