# The Effect of Respiratory Challenge on the BOLD Signal

> **NCT04258774** · NA · ENROLLING_BY_INVITATION · sponsor: **Washington University School of Medicine** · enrollment: 48 (estimated)

## Conditions studied

- Hypoxia, Brain
- Hyperoxia
- Hypercapnia
- Hypocapnia

## Interventions

- **OTHER:** Carbon Dioxide

## Key facts

- **NCT ID:** NCT04258774
- **Lead sponsor:** Washington University School of Medicine
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** ENROLLING_BY_INVITATION
- **Start date:** 2020-01-29
- **Primary completion:** 2027-12-31
- **Final completion:** 2027-12-31
- **Target enrollment:** 48 (ESTIMATED)
- **Last updated:** 2026-01-16


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04258774

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04258774, "The Effect of Respiratory Challenge on the BOLD Signal". Retrieved via AI Analytics 2026-06-08 from https://api.ai-analytics.org/clinical/NCT04258774. Licensed CC0.

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