Weidmann E
Z Orthop Ihre Grenzgeb. 1975 Feb;113(1):29-40.
The numbers of aerial bacteria in the conventionally aerated theaters of the department Balgrist show the chances of contamination. The required low values of 30-70 bacterial/m-3 of air almost always been exceeded during operation, even though the surgical team was well trained. Comparative measurements in the operation-box with vertical air flow, introduced in 1972, showed germ-figures smaller than 1/m-3 close to the wound, independently from whether surgeon and first assistant worked with breath-suction and helmet or without. The number of wounds contaminated at the end of the operation by germs of any source fell from 50 per cent to 5 per cent which is probably the reason for the fall of post-operative infection. Experience so far shows that one can count on reduction of, particularly of early, infection. Since the patient-material changed -there were far more cases at risk- it is impossible to compare present rates of infection with earlier ones.
巴尔格里斯特医院传统通风手术室中的空气细菌数量显示了污染的可能性。尽管手术团队训练有素，但在手术过程中，每立方米空气中30 - 70个细菌的要求低值几乎总是被超过。1972年引入的带有垂直气流的手术箱中的对比测量显示，靠近伤口处的细菌数量小于每立方米1个，无论外科医生和第一助手是使用呼吸抽吸和头盔还是不使用。手术结束时因任何来源的细菌而污染的伤口数量从50%降至5%，这可能是术后感染率下降的原因。迄今为止的经验表明，可以指望减少感染，尤其是早期感染。由于患者材料发生了变化——高危病例更多——因此无法将目前的感染率与早期的进行比较。
