Peri-operative deaths in Singapore: a forensic perspective in a study of 132 cases.

A study of 132, largely non-traumatic, peri-operative deaths out of 6605 Coroner's autopsies, conducted over a three-year period from 1989 to 1991, showed a preponderance of males (M:F ratio = 1.36), with almost half (46.3%) being middle-aged subjects between 40 to 59 years, while infants (< one year old) made up about a tenth of the cases. A total of 51 cases (38.6%) were related to cardiothoracic surgery, which also accounted for the majority of deaths that had occurred intra-operatively (11/21 or 8.3% in all) and within the first postoperative day (16/36 or 12.1% in all). The vast majority of cases (81.8%) were pathologically natural deaths, with 15.2% attributable to complications or mishaps of surgery and invasive diagnostic or therapeutic procedures. There were three anaesthetic deaths which accounted for 2.3% of the cases. Out of 124 completed Coroner's inquiries as at the end of June 1993, verdicts of death from natural causes were recorded in 110 (83.3%) cases. General surgery accounted for the highest proportion of unnatural deaths (6.1%), which was twice that for cardiothoracic surgery (3.0%). While there was close agreement between a finding of a pathologically natural death and a similar Coroner's verdict (107/110 or 97.3%), only a total of ten out of 23 pathologically unnatural deaths received verdicts of misadventure at the time of writing. Although a verdict of misadventure usually pertained to an iatrogenic death, this was not invariably the case. Thus far, no findings of medical negligence was made in any of the Coroner's inquiries into these cases.(ABSTRACT TRUNCATED AT 250 WORDS)