How many hours of CPAP use is required to reduce BP in obstructive sleep apnea (OSA)?

Updated: Sep 15, 2020
  • Author: Himanshu Wickramasinghe, MD, MBBS; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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Although, as noted (see above), other studies suggest that the ability of CPAP to reduce hypertension require 5.6 hours of use per night, the subjects in this study used CPAP approximately 5 hours per night. Again, this limits the effect of CPAP on hypertension as a treatment alone and in combination with valsartan. On other hand, BP reductions with fewer hours of CPAP use than previous published studies further supports CPAP’s robust effect on BP and that fewer than 5.6 hours of CPAP use can lead to BP reductions.

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