Paul v Cooke

The plaintiff, Paul, appealed to the Court of Appeal of New South Wales against a decision of the primary judge that dismissed his claim in negligence against the defendant, Cooke. The dispute concerned the defendant's alleged failure to diagnose an aneurysm, and whether this failure caused the harm suffered by the plaintiff when the aneurysm was eventually treated.

The central legal issues before the Court of Appeal were whether the defendant's conduct breached the duty of care owed to the plaintiff, and crucially, whether any such breach caused the harm suffered by the plaintiff. Specifically, the court had to consider whether the harm suffered by the plaintiff was a materialisation of an inherent risk, and whether the harm was outside the scope of the defendant's liability, as contemplated by the Civil Liability Act 2002 (NSW).

The Court of Appeal affirmed the primary judge's finding that there was no causal link between the defendant's alleged negligence and the plaintiff's harm. The court reasoned that the aneurysm had not deteriorated in the three years prior to its diagnosis, and the harm suffered by the plaintiff occurred during the treatment of the aneurysm, not as a result of its growth or rupture. Therefore, the materialisation of the harm was not within the scope of the defendant's liability for failing to diagnose the aneurysm. The court applied principles of causation under the Civil Liability Act, finding that the plaintiff had failed to establish that the defendant's breach of duty was a necessary condition for the occurrence of the harm.

The appeal was dismissed, and the plaintiff was ordered to pay the defendant's costs.