# Changes in Cerebral Blood Flow (CBF) in Prone and Sitting Position Before and After GSP-block and Before and After Epidural Blood-patch: A Substudy of NCT03652714

> **NCT03966547** · NA · WITHDRAWN · sponsor: **University Hospital Bispebjerg and Frederiksberg**

## Conditions studied

- Postdural Puncture Headache
- Sphenopalatine Ganglion Block

## Interventions

- **PROCEDURE:** Ganglion sphenopalatine block with local anesthetic administered on study GSPB-2018
- **PROCEDURE:** Ganglion sphenopalatine block with placebo administered on study GSPB-2018

## Key facts

- **NCT ID:** NCT03966547
- **Lead sponsor:** University Hospital Bispebjerg and Frederiksberg
- **Sponsor class:** OTHER
- **Phase:** NA
- **Study type:** INTERVENTIONAL
- **Status:** WITHDRAWN
- **Start date:** 2020-05
- **Primary completion:** 2020-08
- **Final completion:** 2020-10
- **Target enrollment:** 0 (ACTUAL)
- **Why stopped:** Main study concluded before enrollment
- **Last updated:** 2020-11-20


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03966547

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03966547, "Changes in Cerebral Blood Flow (CBF) in Prone and Sitting Position Before and After GSP-block and Before and After Epidural Blood-patch: A Substudy of NCT03652714". Retrieved via AI Analytics 2026-06-03 from https://api.ai-analytics.org/clinical/NCT03966547. Licensed CC0.

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