Subarachnoid Hemorrhage: What to Do When Aneurysm Clipping or Coiling Does Not Achieve Complete Obliteration
Aneurysmal subarachnoid hemorrhage (aSAH) management involves a sequence of steps. When the primary aneurysm-securing procedure falls short of its goal, a structured next-line approach addresses the risks that remain — particularly the serious risk of secondary neurological injury in the days that follow.
The preceding intervention was early surgical clipping or endovascular coiling of the ruptured aneurysm. The target of that step — complete obliteration of the ruptured aneurysm — was not achieved. This protocol represents the defined next step following that outcome.
At this stage, management centres on the early initiation of a specific enteral agent directed at preventing cerebrovascular vasospasm and its consequences, combined with strategies to maintain appropriate intravascular fluid status. The full structured regimen — including timing, sequencing, and monitoring — is available through the protocol.
Prevention of delayed cerebral ischemia (DCI) throughout the vasospasm window — the period of highest secondary neurological risk after aSAH. DCI occurs in approximately 30% of patients, predominantly between days 4 and 14 after the initial bleed.
References
DOI: 10.1161/str.0000000000000436
- In patients with aSAH, early initiation of enteral nimodipine is beneficial in preventing DCI and improving functional outcomes.
- Continued enteral administration at a dose of 60 mg 6 times a day can be beneficial in preventing DCI and improving functional outcome, as originally published in the 1983 clinical trial and confirmed in a meta-analysis of 16 trials involving 3361 patients.
- In patients with aSAH, maintaining euvolemia can be beneficial in preventing DCI and improving functional outcomes.
- DCI occurs in ≈30% of patients, mostly between days 4 and 14 after aSAH.