Drain vs. no drain in primary thyroid and parathyroid surgery.

The need for drainage after primary thyroid or parathyroid surgery was evaluated in a prospective study in which 100 consecutive patients were randomly allocated to drainage or no drainage. Seroma developed in the wound in seven of the 50 patients without drainage and in two of the 50 with drainage. There were no residual effects of the seromas, which resolved spontaneously. The incidence of wound complication was unrelated to the surgeon's opinion on the need for drainage. The study provided no statistical report for routine use of drains in primary thyroid or parathyroid surgery.