# NIRS vs TCD for Cerebrovascular Autoregulation During Non-cardiac Surgery

> **NCT04978558** · — · COMPLETED · sponsor: **Universitätsklinikum Hamburg-Eppendorf** · enrollment: 509 (actual)

## Conditions studied

- Cerebrovascular Circulation

## Interventions

- **OTHER:** Continuous assessment of cerebrovascular autoregulation with NIRS and TCD

## Key facts

- **NCT ID:** NCT04978558
- **Lead sponsor:** Universitätsklinikum Hamburg-Eppendorf
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2021-08-09
- **Primary completion:** 2023-09-29
- **Final completion:** 2024-09-19
- **Target enrollment:** 509 (ACTUAL)
- **Last updated:** 2025-10-02


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04978558

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04978558, "NIRS vs TCD for Cerebrovascular Autoregulation During Non-cardiac Surgery". Retrieved via AI Analytics 2026-06-16 from https://api.ai-analytics.org/clinical/NCT04978558. Licensed CC0.

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*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*