McCarthy v Kidd

In *McCarthy v Kidd*, the plaintiff, Ms. McCarthy, appealed a decision of the trial judge who had found that her medical negligence claim against the defendant, Dr. Kidd, failed on the issue of causation. Ms. McCarthy alleged that Dr. Kidd was negligent in failing to warn her of the risks associated with iron injections, and that these injections caused her to develop gluteal fibrosis.

The central legal issues before the appellate court were whether the trial judge erred in finding that Ms. McCarthy had not proven causation, specifically whether the iron injections administered by Dr. Kidd caused her gluteal fibrosis. This involved considering the controversial medical evidence presented regarding the link between such injections and the condition, and the trial judge's assessment of Ms. McCarthy as a witness. The court also implicitly considered the role of medical evidence in determining the necessity and content of warnings in medical negligence cases, and the subjective and hypothetical nature of whether a patient would have heeded a warning.

The appellate court upheld the trial judge's findings. It was noted that the trial judge had the advantage of observing Ms. McCarthy give evidence and concluded she was a poor historian, which likely influenced her assessment of her credibility and the reliability of her account. The court found that the medical evidence regarding causation was indeed controversial, and that the trial judge was entitled to weigh this evidence and conclude that Ms. McCarthy had not discharged the onus of proving that the iron injections caused her gluteal fibrosis.

The appeal was dismissed with costs.