[Actiopathogenic study of per and postoperative haemorrhage in adenotonsillectomy in the child (author's transl)].

This study involved 4 201 records between July 1st 1969 and February 28th 1979. Various parameters represented by specific patient data (age, sex, ENT infections), laboratory examinations, operative findings and weather conditions were studied. Adenoidectomy was found to be more haemorrhagic than adenotonsillectomy, in particular in the presence of a large clump of adenoids and in autumn or winter. Use of a halothane-nitrous oxide-oxygen mixture decreased the number of haemorrhages which by contrast were increased by an operative position in a dorsal horizontal position. Finally, any deviation from standard meterological conditions would appear to be a pejorative factor. The authors conclude by stating that no serious complications were seen and that it is important to undertake a precise and complete preoperative laboratory assessment. Finally, mutual confidence between surgeon and anaesthetist is an additional factor in decreasing risk.