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Table 4 Mean values of CFU/m 3 air during seven operations in operating room 5 when all persons present were dressed in surgical clothing systems of either mixed material (69% cotton, 30% polyester, 1% carbon fibre) or polyester (99% polyester, 1% carbon fibre) of two kinds

From: Comparison of three distinct surgical clothing systems for protection from air-borne bacteria: A prospective observational study

Type of surgery Clothing Number of persons present CFU/m3 air mean (min-max)
Hip Mixed material, brand new 7 46.5 (40–58)
Knee Mixed material, brand new 8 49.0 (37–88)
Knee Mixed material, brand new 6 28.6 (12–50)
Knee replacement Polyester HK-1069KS Not noted 7.3 (5–10)*
Knee Polyester HK-1069KS 7 7.0 (1–13)
Knee Polyester 807TK-310 8 5.2 (2–8)
Knee Polyester 807TK-310 7 4.3 (2–9)
  1. * Value not used in calculation of source strength (Table 4).