In contrast to electrocautery, the ultrasound dissection scalpel allows tissue dissection and haemostasis to be performed without the danger of thermal tissue damage or burning caused by uncontrolled active current. In a clinical application study performed on 24 boys with an average age of six years, we examined whether the use of this instrument is also practical in a routine operation such as circumcision. It was possible to perform all operations with the ultrasound dissection scalpel (Ultracision, manufactured by Ethicon) by the classic technique without the additional use of electrocautery for haemostasis. Although dissecting speed is slower than with conventional instruments, the fact that simultaneous haemostasis is possible meant that operations could be carried out quickly and with minimal bleeding. There were no perioperative complications such as haemorrhaging or burning. All children were examined postoperatively over an average of 3 weeks (range 1-8 weeks). Wound healing was completely without complications for 22 patients (92%). One patient (4%) suffered a candidal infection in the first postoperative week. One further patient (4%), who was already suffering preoperatively from an extended chronic inflammation of the prepuce, developed pronounced swelling postoperatively. Heavy scarring occurred subsequently in both cases. Our results show that the advantages of the ultrasound dissection scalpel, e.g. gentle tissue dissection with simultaneous haemostasis, can also be used to advantage for a technically simple operation such as circumcision without having to fear the risks of electrocautery.