Sleep apnea machine may also treat blood disorder

NCT ID NCT06089603

First seen Jun 24, 2026 · Last updated Jun 26, 2026 · Updated 2 times

Summary

This study tests whether using a CPAP machine at night can reduce high red blood cell counts (polycythemia) in people with moderate to severe sleep apnea. Researchers will compare 182 adults who use CPAP plus standard care to those who receive only standard care over 12 months. The main goal is to see if CPAP lowers hematocrit levels, which could reduce the risk of blood clots and other complications.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance

Continuous positive airway pressure (CPAP) device

What this could lead to

If successful, CPAP could become a standard treatment to reduce high red blood cell counts in people with sleep apnea, potentially lowering their risk of blood clots and other complications.

What could go wrong

This is a Phase 4 trial, so CPAP is already approved for sleep apnea, but its effect on polycythemia is not yet proven. The study is not blinded, which could introduce bias, and results may not apply to all patients.

Disclaimer Read more

This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.

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Conditions

The condition(s) this trial relates to.

obstructive sleep apnea syndrome polycythemia

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Contacts and locations

Study contacts

  • Contact

    Phone: •••-•••-•••• Email: •••••@•••••

Locations

  • Aldara García-Sanchez

    RECRUITING

    Madrid, Madrid, 28034, Spain

    Contact