Efficacy of Percutaneous SPG Block in Aneurysmal SAH

  • End date
    Dec 31, 2022
  • participants needed
  • sponsor
    Mayo Clinic
Updated on 15 February 2021
subarachnoid hemorrhage
aneurysmal subarachnoid hemorrhage


Researchers are trying to develop alternative means to help patients with headache pain secondary to aneurysmal subarachnoid hemorrhage (bleeding about the brain).


This study is an open label, feasibility study that will consist of fifteen patients. This study will enroll only patients who have aneurysmal SAH that are secured by endovascular coiling. When a patient notes a severe headache which requires medical intervention on at least day 3 of the hospital admission, they will be asked if they would like to participate in an open label trial to use a bilateral SSPGB in addition to traditional medical management per unit protocol. The risks and benefits of the procedure will be explained to the patient. The patient will then either agree or disagree. If the patient disagrees, they will not be enrolled in the study. If the patient agrees, they will sign an informed consent and will be enrolled. Inclusion and exclusion criteria will be reviewed before enrolling a patient. The patients will first rate their pain from 0-10 on the numeric rating scale (NRS) (10 being the most severe). If their pain is at a level 5 or more and it is not responsive to traditional medical therapies, they will be a candidate for the study. The patients will receive bilateral injections as outlined below (5 mL: 4.5mL of 0.5% bupivacaine and 0.5mL of 10mg/mL dexamethasone on each side for total volume of 10 mL). Thirty minutes later and 24 hours following injection, the patient will rate their pain from 0-10 on the NRS. The description of the procedure is stated below. A success would be considered a drop in their pain score of at least 2.

Adverse effects will also be recorded 30 minutes after the procedure and the following day. Chart review on both provider and nursing notes will be performed on subsequent days to evaluate for adverse effects.

Condition Headache, Pain, Subarachnoid Hemorrhage, Post-Surgical Pain, Pain (Pediatric), Headaches
Treatment Regional anesthetic SPG block-bilateral
Clinical Study IdentifierNCT04331938
SponsorMayo Clinic
Last Modified on15 February 2021


Yes No Not Sure

Inclusion Criteria

Age 18 and older
Aneurysmal SAH in anterior/middle cerebral compartment
Aneurysm must be secured endovascular with coiling
The patient or patient's surrogate should be able to give informed consent and understand the risks of this study
Pain NRS 5/10 in severity

Exclusion Criteria

Non aneurysmal, traumatic SAH
Posterior fossa aneurysm ruptures
Transcranial Doppler velocities suggestive of or approaching vasospasm
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Additional screening procedures may be conducted by the study team before you can be confirmed eligible to participate.

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If you are confirmed eligible after full screening, you will be required to understand and sign the informed consent if you decide to enroll in the study. Once enrolled you may be asked to make scheduled visits over a period of time.

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Complete your scheduled study participation activities and then you are done. You may receive summary of study results if provided by the sponsor.

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