Abstract
The purpose of this paper is to study the effectiveness of a surgical horizontal filtered air flow unit on air and total hip replacement (THR) wound contamination. Unidirectional air flow consists of air that has been driven through high efficacy 0.3 μ particle retaining filters (HEPA filters) and then directed through a grit in such a fashion that there is low turbulence and the air moves “en block”. The conclusions of the study, which has been carried out in three groups of cases, are the following:
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