Influence of the Use of a Surgical Isolator on the Rate of Infection in the Treatment of Hydrocephalus

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Abstract
Two series of patients treated for hydrocephalus (101 original shunt insertions, 81 revisions and 35 reinsertions after infections) have been operated on in the same location, 146 with a surgical isolator (SI), 71 without a SI. Due to temporary poor technical conditions, the use of a SI was decided because, the overall rate of acute postoperative infections had suddenly increased from 9 to 19.7%. Then, although these technical conditionns remained unchanged, the use of the SI immediately reduced the overall rate of acute postoperative infections from 19.7 to 7.4%. In original shunt insertions, this rate decreased from 24.9 to 5.8% and in revisions from 10.7 to 5.5%. In reinsertions after infection, it only fell from 27.2 to 16.6%. With the SI, the rate of peroperative contamination is almost nil. If postoperative contaminations due to wound disruption or scalp necrosis, and shunt reinsertions after infection are not taken into account, the rate of acute postoperative infection is 0.8%. The data presented indicate the efficiency of the SI. This results from elimination by the SI of airborne contamination and errors in aseptic technique. These two factors are probably the main sources of infection in shunt insertions for hydrocephalus.

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