Circumcision remains a common operation, with over 30,000 procedures performed annually in the UK, mostly on children. The British Medical Association has recommended that circumcision should be performed only for medical reasons. Despite this, controversy exists over whether too many circumcisions are being performed. Are patients being exposed to an unnecessary operation? It may be argued that in doubtful cases it is easier to proceed to circumcision on the assumption that the attendant risks are low, but the operation is associated with a definite morbidity and rare deaths have been reported. This review considers the spectrum of complications that may result from circumcision and discusses the possible aetiological mechanisms.

Objectives-Oesophageal pH monitoring is the gold standard technique for the detection of gastro-oesophageal reflux in adults and children. A standard parameter used to define "abnormal" reflux is the percentage of recording time for which the gastric pH is < 4. This study investigated the relevance of this measure in infants on regular milk feeds whose gastric contents and refluxate will be neutral for most of the recording time. Methods-Simultaneous oesophageal and gastric pH monitoring was carried out on all infants who were milk fed exclusively and admitted to hospital for suspected gastro-oesophageal reflux. In vitro studies were performed to establish the buVering capacities of the fruit juice, Dioralyte (a glucose electrolyte solution), breast milk, and milk formula feeds available on the paediatric wards. Results-Complete sets of data were obtained from 30 babies with a mean age of 4 months. Gastric pH was < 4 for a mean (SEM) of 42.4 (4.9)% of the recording time. The mean (SEM) percentage time that oesophageal pH was < 4 for the total recording period was 6.89 (0.92)%. Recalculation of the percentage of time that the gastric pH was > 4 increased this value to 17.81 (2.46)%. Using a cut oV point of 10%, 11 of the 30 babies would have been diagnosed positive for reflux using the conventional method; however, recalculation by ignoring the time for which gastric pH was high doubled this to 22 positive for reflux. Conclusion-Combined oesophageal and gastric pH monitoring greatly increases the number of positive results from tests in infants on regular milk feeds. (Arch Dis Child 1999;81:309-312)

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