|It is described that warming patients during colorectal surgery can reduce infection rates. In this british study, the group aimed to assess whether warming patients before short duration, clean surgery would have the same effect.
421 patients having clean (breast, varicose vein, or hernia) surgery were randomly assigned to either a non-warmed (standard) group or one of two warmed groups (local and systemic).
They applied warming for at least 30 min before surgery. Patients were followed up and masked outcome assessments made at 2 and 6 weeks.
Analysis was done on an intention-to-treat basis. 19 wound infections in 139 non-warmed patients (14%) but only 13 in 277 who received warming (5%; p=0?001) were idenitified. Wound scores were also significantly lower (p=0?007) in warmed patients.
There was no significant difference in the development of haematomas or seromas after
surgery but the non-warmed group were prescribed significantly more postoperative antibiotics (p=0?002)
Warming patients before clean surgery seems to aid the prevention of postoperative wound infection. If applied according to the manufacturers guidelines these therapies have no known side-effects and might, with the support of further studies, provide an alternative to prophylactic antibiotics in this type of surgery.
Source: AC Melling, B Ali, E M Scott, D J Leaper (2001): Effects of preoperative warming on the incidence of wound infection after clean surgery: a randomised controlled trial. In: Lancet 2001; 358: 876-80