Non-invasive treatment for brain fog in Long COVID patients

Pilot Study to Investigate Possible Non-invasive Treatment for Long COVID (Post COVID-19 Condition) Brain Fog

Not applicable Interventional Mayo Clinic · NCT06614309

This study is testing a new non-invasive treatment for brain fog in people with Long COVID to see if changes in oxygen and carbon dioxide levels can help improve their symptoms.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment45 (estimated)
Ages18 Years and up
SexAll
SponsorMayo Clinic Academic / other
Locations1 site (Scottsdale, Arizona)
Trial IDNCT06614309 on ClinicalTrials.gov

What this trial studies

This study evaluates the effects of both acute and chronic exposure to hypoxia and hypercapnia on patients suffering from Long COVID syndrome, specifically targeting symptoms like brain fog. Participants will undergo various interventions, including acute placebo visits and progressive carbon dioxide exposure, to assess their impact on brain blood flow and heart rate variability. The study aims to provide insights into non-invasive treatment options for managing fatigue and cognitive difficulties associated with Long COVID.

Who should consider this trial

Good fit: Ideal candidates for this study are English-speaking individuals diagnosed with Long COVID.

Not a fit: Patients with a history of significant cardiovascular or neurological diseases, or those requiring supplemental oxygen, may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could offer new non-invasive treatment options for patients experiencing brain fog due to Long COVID.

How similar studies have performed: While the approach of using hypoxia and hypercapnia is novel in the context of Long COVID, similar interventions have shown promise in other conditions, suggesting potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion criteria:

* English speaking
* Diagnosis of Long COVID

Exclusion criteria:

* Any history of:

  * Coronary artery dissection or aortic dissection
  * Neurological disease (e.g. dementia, Alzheimer's disease, or other brain-related disease)
  * Cerebrovascular disease or stroke
  * Aneurysm
* If currently has:

  * Moderate-severe chronic obstructive pulmonary disease
  * Uncontrolled moderate-severe asthma
  * Moderate-severe bronchiectasis
  * Moderate-severe interstitial lung disease, requiring the use of supplemental oxygen
  * A necessity to use supplemental oxygen, for any reason
  * New or worsening symptoms (decompensation) of heart failure
  * Right heart disease due to chronic pulmonary disease/sleep apnea
  * Uncontrolled myocardial ischemia or angina
  * Uncontrolled heart arrhythmias
  * Heart or lung infection (e.g. myocarditis or pericarditis)
  * Left main coronary artery stenosis
  * Moderate-severe aortic stenosis
  * Pulmonary embolism, pulmonary infarction, or other blood clots
  * Severe respiratory disease
  * Chronic kidney disease
  * Chronic liver disease
* Females of childbearing potential will complete a urine pregnancy test at their baseline visit to rule out pregnancy
* BMI \>40
* Study staff unable to obtain adequate signal for cerebral blood flow

Where this trial is running

Scottsdale, Arizona

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Long COVIDbrain fogbrain blood flowheart rate variabilityfatigue
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.