External ventricular drain infection: improved technique can reduce infection rates

Area of Science:

• Neurosurgery
• Infectious Disease
• Critical Care Medicine

Background:

• External ventricular drains (EVDs) are crucial for managing acute neurosurgical conditions but carry a significant risk of infection (0-45%).
• EVD infections lead to increased morbidity, mortality, hospital stays, and costs.
• This study compares EVD infection rates in clinical practice versus a research cohort with frequent EVD sampling.

Purpose of the Study:

• To compare the incidence of EVD-related cerebrospinal fluid (CSF) infections between standard clinical neurosurgical practice and a research setting.
• To evaluate the safety of frequent EVD sampling in a research cohort.

Main Methods:

• Retrospective review of patients with EVD placement between 2005-2008.
• Comparison of infection rates in a clinical group (n=94) versus a research group (n=39) with frequent EVD sampling.
• Exclusion of patients not diagnosed with hydrocephalus secondary to aneurysmal subarachnoid hemorrhage (SAH).

Main Results:

• Clinical group: 52.1% infection rate per patient and 31.4% per EVD.
• Research group: 10.3% infection rate per EVD (p=0.0001).
• A statistically significant reduction in infection rates was observed in the research group.

Conclusions:

• Frequent sampling or irrigation of EVD systems does not elevate the risk of central nervous system (CNS) infection.
• Appropriate operator experience and adherence to aseptic techniques are critical for safe EVD management.
• The findings support the safety of intensive monitoring protocols for EVDs.