Prophylactic hypervolemia without calcium channel blockers in early aneurysm surgery

Area of Science:

• Neurosurgery
• Neurology
• Critical Care Medicine

Background:

• Delayed ischemic neurological deficit (DIND) is a significant complication following aneurysmal subarachnoid hemorrhage (SAH).
• Historically, surgical intervention for aneurysms was delayed due to concerns about operative complications.

Purpose of the Study:

• To evaluate the efficacy of prophylactic hypervolemia in reducing DIND and improving outcomes in SAH patients undergoing early surgery.
• To assess the impact of aggressive fluid management on neurological morbidity and mortality.

Main Methods:

• A cohort of 47 patients with Hunt and Hess Grades I-III aneurysmal SAH underwent aneurysm clipping within 72 hours.
• Prophylactic hypervolemia was administered, monitored via a pulmonary artery catheter for fluid management optimization.
• Outcomes, DIND incidence, and complications were recorded over a 42-month period.

Main Results:

• 85% (40/47) of patients achieved an excellent or good outcome.
• 6% (3/47) of patients died, all from DIND.
• 19% (9/47) of patients developed DIND.
• 20 complications, including pulmonary edema, occurred in 16 patients; one death was linked to hypervolemia.

Conclusions:

• Prophylactic hypervolemia, even when aggressive, did not demonstrate a clear benefit in reducing DIND or improving outcomes in this SAH cohort.
• The high rate of complications, such as pulmonary edema, suggests potential risks associated with aggressive fluid management without clear neurological advantages.
• Further research is needed to determine optimal fluid management strategies for SAH patients undergoing early surgical intervention.