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[Hydrocephalus after aneurysmal subarachnoid hemorrhage].

A Shiino1, F Suzuki, T Nakazawa

  • 1Department of Neurosurgery, Shiga University of Medical Science, Ohtsu, Japan.

No Shinkei Geka. Neurological Surgery
|January 1, 1988
PubMed
Summary

This study examined 117 patients who had ruptured aneurysms to identify factors that may increase the risk of developing chronic hydrocephalus after aneurysmal subarachnoid hemorrhage. Researchers found that patients with aneurysms in the anterior communicating artery, those with acute hydrocephalus, and those with thick clots on initial CT scans were more likely to develop chronic hydrocephalus. Additionally, patients with higher clinical grades at admission and those who received more than 30 g of tranexamic acid also showed increased risk. The study highlights correlations between these factors and chronic hydrocephalus but does not establish causality. These findings may help guide clinical decisions regarding monitoring and treatment options for patients at higher risk.

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Area of Science:

  • Neurological disorders within clinical neurology
  • Imaging techniques in cerebrovascular disease

Background:

The role of CT in diagnosing hydrocephalus following aneurysmal subarachnoid hemorrhage is well established. However, the actual frequency and underlying causes of this condition remain unclear. While ventricular expansion is a common finding, it does not always align with patient symptoms. This lack of correlation complicates decisions about when to perform shunting procedures. Prior research has shown that diagnostic imaging is essential in identifying post-hemorrhagic hydrocephalus. Yet, the factors that predict chronic hydrocephalus are not fully understood. No prior work had resolved whether specific aneurysm locations or clot characteristics influence hydrocephalus development. This uncertainty motivated researchers to examine a large cohort of patients. The goal was to identify patterns in patient data that might clarify risk factors for chronic hydrocephalus. By focusing on clinical and imaging variables, the study aimed to provide clearer guidance for patient management.

Purpose Of The Study:

The study aimed to determine factors associated with chronic hydrocephalus following aneurysmal subarachnoid hemorrhage. Researchers wanted to clarify whether certain clinical or imaging features predict the development of this condition. Aneurysm location was considered a potential contributor to hydrocephalus risk. The role of initial clinical severity was also examined as a possible indicator. Researchers focused on whether clot thickness or gyral enhancement on CT scans influenced outcomes. Tranexamic acid use was another variable of interest due to its possible impact on clot dynamics. By analyzing a cohort of 117 patients, the study sought to identify patterns in hydrocephalus development. The ultimate goal was to provide evidence-based criteria for predicting chronic hydrocephalus.

Keywords:
aneurysmal subarachnoid hemorrhagechronic hydrocephalusCT imaging in hydrocephalusneurological complications

Frequently Asked Questions

The study found that aneurysm location, acute hydrocephalus, and clot thickness are associated with chronic hydrocephalus.

Gyral enhancement observed on initial CT scans is a significant predictor of chronic hydrocephalus development.

Tranexamic acid use exceeding 30 g was linked to higher rates of chronic hydrocephalus in the patient cohort.

Aneurysms of the anterior communicating artery were more commonly associated with chronic hydrocephalus.

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Main Methods:

The study involved a retrospective analysis of 117 patients with ruptured aneurysms. Researchers reviewed clinical records and imaging data to identify risk factors for chronic hydrocephalus. CT scans were used to assess initial clot thickness and gyral enhancement. Clinical grades at admission were recorded as part of the data collection. The location of the aneurysm was categorized, with a focus on anterior communicating artery cases. Tranexamic acid dosage was tracked to evaluate its potential influence. Statistical analysis was performed to determine correlations between variables and hydrocephalus outcomes. The study design allowed for the identification of patterns in patient data.

Main Results:

Chronic hydrocephalus was found to be more common in patients with aneurysms of the anterior communicating artery. Those who had acute hydrocephalus at the time of admission also showed higher rates of chronic hydrocephalus. Patients with higher clinical grades upon admission were more likely to develop chronic hydrocephalus. Thick clots observed on initial CT scans were associated with increased risk. Gyral enhancement on CT scans was another significant predictor of chronic hydrocephalus. Tranexamic acid use exceeding 30 g was linked to higher rates of chronic hydrocephalus. These findings suggest multiple factors contribute to hydrocephalus development. The strongest association was observed with aneurysm location and clot characteristics.

Conclusions:

The study suggests that aneurysm location, initial clinical severity, and clot characteristics are linked to chronic hydrocephalus risk. The presence of acute hydrocephalus and gyral enhancement on CT scans may indicate a higher likelihood of chronic hydrocephalus. Tranexamic acid use above 30 g appears to be a potential contributing factor. These findings do not establish causality but highlight correlations observed in the patient data. The results may help guide clinical decisions regarding monitoring and treatment. However, the study does not propose definitive criteria for shunting decisions. The authors emphasize the need for further research to clarify the mechanisms involved. These observations provide a foundation for future investigations into post-hemorrhagic hydrocephalus.

Clinical grades at admission were used to evaluate the severity of aneurysmal subarachnoid hemorrhage.

Thick clots observed on CT scans were associated with increased risk of chronic hydrocephalus.