VICNISS - Surgical Site Infection – 75th Percentile of Surgery Duration

Surgical Site Infection – 75th Percentile of Surgery Duration

Surgical Site Infection – 75^th Percentile of Surgery Duration

Surgery duration, ASA and wound class are used to calculate the SSI Basic Risk Index for each operative procedure. A point is allocated if for each of the following:

ASA is ≥ 3,
the wound class is contaminated or dirty
Operation lasting more than t hours where t is the approximate 75th percentile of the duration of surgery for that particular operative procedure. That is, 75% of the operations for that procedure were shorter than t hours and 25% were longer than t hours.

Using more recent data VICNISS has revised the 75^th percentile duration for some procedure groups, see table below:

Procedure Group	75^th percentile surgery duration before 1/7/22	75^th percentile surgery duration after 1/7/22	Comments
APPY	54 mins	54 mins	No change
BRST	49 mins	76 mins	Increased 27 mins
CARD	300 mins	330 mins	Increased 30 mins
CBGB	305 mins	305 mins	No change
CBGC	288 mins	288 mins	No change
CHOL	80 mins	88 mins	Increased 8 mins
COLO	205 mins	240 mins	Increased 35 mins
CRAN	185 mins	185 mins	No change
CSEC	48 mins	57 mins	Increased 9 mins
FPOP	230 Mins	255 mins	Increased 25 mins
FUSN	310 mins	228 mins	Reduced 82 mins
HERN	54 mins	72 mins	Increased 18 mins
HPRO	120 mins	120 mins	No change
HYST	108 mins	150 mins	Increased 42 mins
KPRO	103 mins	126 mins	Increased 23 mins
LAM	128 mins	128 mins	No change
PACE		60 mins