• Ariane Roujansky, Natacha Kapandji, Sylvain Diop, Paul-Louis Woerther, Jean Pasqueron, Françoise Tomberli, Camille Legouy, Suhan Senova, Hatem Kallel, and Roman Mounier.
• Réanimation polyvalente, Centre Hospitalier de Cayenne, Cayenne, French Guiana. Electronic address: ariane.roujansky@gmail.com.
• World Neurosurg. 2023 Aug 1; 176: e438e446e438-e446.

ObjectiveOur aim was to compare the prevalence of biofilm formation on antibiotic-impregnated (AIC) versus standard (SC) external ventricular drain (EVD) catheters.MethodsFrom March 2018 to November 2020, all consecutive EVD catheters inserted in adult patients were included. After removal, EVD catheters were analyzed under scanning electronic microscopy, on both extraluminal and intraluminal faces. Standard culture of catheter tips was also performed.ResultsOverall, 114 catheters were included in 101 patients. There were 48 AICs and 66 SCs. Standard culture showed that ventriculostomy-related colonization was more frequent in SC than in AIC (26 vs. 10%; P = 0.06). Gram-negative rods accounted for 25% of ventriculostomy-related colonization in AICs, and none was documented in SCs. Scanning electronic microscopy observation showed mature biofilm on more than 80% of catheters, without significant difference between catheter type. Also, there was no difference between extraluminal and intraluminal colonization rate. There were 2 ventriculostomy-related infections in each group (5% and 3% among AICs and SCs respectively; P = 1).ConclusionsMature biofilm presence on the intraluminal and the extraluminal faces is similar on AICs and SCs. Accordingly, AICs do not seem to efficiently prevent biofilm formation on EVD catheters. The impact of AICs on the microbiological epidemiology of colonizing biofilm should be further evaluated.Copyright © 2023 Elsevier Inc. All rights reserved.

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