Adjective:

1. happening or done before and in preparation for a surgical operation

PREabbr.Petroleum Refining Engineer炼油工程师Prensol己雷琐辛, 己基间苯二酚, 己基间二羟苯, 六烷雷琐辛[驱肠虫药]

1. Preoperative pulmonary insufficiency represents a critical problem.
   手术前肺功能不全成为一关键问题。
2. All other preoperative parameters were similar in both groups.
   两组间其他所有的术前参数是相似的。