From: Drain fluid amylase as a predictor of postoperative salivary fistula in cases with benign parotid tumours
Volume in cases Without salivary fistula
Volume in cases With salivary fistula
Drain fluid amylase (U/L)
Range
27–261,136
34,215–716,823
Mean
34,340.3
155,491.1
Median
18,366.5
80,132.5
Drainage volume (ml)
0–158
11–230
58
73
57
51