Background
Campbell bht Mammoliti v Ritchie [2026] NSWSC 754 concerned a medical negligence claim brought against bariatric surgeon Dr James Ritchie arising from a biliopancreatic diversion (BPD) procedure performed on 9 March 1999. The plaintiff alleged that the surgery and subsequent post-operative management caused a range of physical and psychiatric conditions, including micronutrient and vitamin deficiencies, cognitive impairment, behavioural disturbances and psychological injury.
The proceedings involved a lengthy hearing before Weinstein J. Evidence was heard over 24 days, the plaintiff was cross-examined for 14 days, and 12 experts gave evidence. A substantial issue throughout the case was the plaintiff’s credibility and the reliability of his account when compared with contemporaneous medical and documentary records.