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Intracranial pressure changes following aneurysm rupture. Part 3: Recurrent hemorrhage
Insights
Continuous monitoring revealed that cerebrospinal fluid (CSF) drainage during recurrent intracranial hemorrhage may be harmful. Avoiding CSF drainage during rebleeding events is crucial for patient outcomes.
Area of Science:
- Neurosurgery
- Neurology
- Critical Care Medicine
Background:
- Recurrent hemorrhage after initial aneurysm rupture is a critical complication.
- Patients often present with severe neurological deficits (Hunt and Hess Grade III-IV).
- Angiographic vasospasm is frequently observed in these patients.
Purpose of the Study:
- To investigate the impact of continuous intraventricular pressure (IVP) monitoring during recurrent intracranial hemorrhages.
- To evaluate the effect of cerebrospinal fluid (CSF) drainage on rebleeding and patient outcomes.
Main Methods:
- Continuous IVP monitoring in 10 patients experiencing 13 recurrent hemorrhages.
- Measurement of IVP and mean arterial blood pressure between and during rebleeding events.
- Analysis of CSF drainage effects on rebleeding rates and post-hemorrhage IVP levels.
Main Results:
- Elevated IVP and mean arterial blood pressure were noted between rebleeding episodes compared to non-rebleeding patients.
- CSF drainage to 25 mm Hg did not increase rebleeding rates (17% of patients).
- CSF drainage during active rebleeding led to increased IVP and poor outcomes, including death in 4 patients.
Conclusions:
- CSF drainage should be avoided during active recurrent intracranial hemorrhage.
- Resuming CSF drainage should be delayed until a stable IVP is achieved post-rebleeding.
- Intervention during rebleeding may impede natural hemostasis mechanisms.
Abstract:
Continuous monitoring of intraventricular pressure (IVP) was performed before and during 13 recurrent hemorrhages occurring in 10 patients between the 3rd and 14th day after the initial rupture of an intracranial saccular aneurysm. Before re-rupture, nine patients were of Hunt and Hess' clinical Grade III of IV. Severe angiographic vasospasm was demonstrated in six patients. In the period between ruptures, IVP and mean arterial blood pressure were significantly increased compared to pressures in patients who did not rebleed. Ventricular drainage of cerebrospinal fluid (CSF) to a level of 25 mm Hg did not increase the rate of rebleeding (17% of patients). On the other hand, the use of drainage while the repeat rupture was taking place seemed to exert a deleterious effect on the natural mechanisms that lead to arrest of hemorrhage. In five patients with CSF drainage during their rebleed, the steady-state IVP level after the repeat rupture was significantly increased, and four patients died from large intracerebral hemorrhages. These results suggest that drainage of CSF should be avoided during recurrent hemorrhage, and should not be resumed until a steady-state IVP level has been reached.