Abstract
Background External ventricular drain (EVD) placement is essential for the management of many neurocritical care patients. However, ventriculostomy-related infection (VRI) is a serious complication, and there remains no well-established protocol guiding use of perioperative or extended antibiotic prophylaxis to minimize risk of VRI. Objective To analyze published evidence on the efficacy of extended prophylactic antimicrobial therapy and antibiotic-coated external ventricular drains (ac-EVDs) in reducing VRI incidence. Methods We searched PubMed for studies related to VRIs and antimicrobial prophylaxis. Eligible articles reported VRI incidence in control and treatment cohorts evaluating prophylaxis with either extended systemic antibiotics (> 24 hr) or ac-EVD. Risk ratios and VRI incidence were aggregated by prophylactic strategy, and pooled estimates were determined via random or mixed effects models. Study heterogeneity was quantified using I2 and Cochran's Q statistics. Rigorous assessment of study bias was performed, and PRISMA guidelines were followed throughout. Results Across 604 articles, 19 studies (3%) met eligibility criteria, reporting 5242 ventriculostomy outcomes. Extended IV and ac-EVD prophylaxis were associated with risk ratios of 0.36 [0.14, 0.93] and 0.39 [0.21, 0.73], respectively. Mixed effects analysis yielded expected VRI incidence of 13% to 38% with no prophylaxis, 7% to 18% with perioperative IV prophylaxis, 3% to 9% with either extended IV or ac-EVD prophylaxis as monotherapies, and as low as 0.8% to 2% with extended IV and ac-EVD dual prophylaxis. Conclusion Management with both extended systemic antibiotics and ac-EVDs could lower VRI risk in ventriculostomy patients, but the impact on associated morbidity and mortality, healthcare costs, and length of stay remain unclear.
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