The Head: Health, Department of Health, Provincial Administration: Western Cape v Charles Oppelt

The respondent, Charles Oppelt, was a 17-year-old playing club rugby as hooker on 23 March 2002. During a contested scrum collapse, he suffered a severe cervical spine injury (bilateral cervical facet dislocation). This left him paralysed below his neck (quadriparetic). Oppelt sued the Department of Health (Western Cape) and three rugby organisations, alleging they were negligent. The claim was based on the theory of Dr Dennis Newton that Oppelt should have been treated using closed reduction within four hours of the injury. Dr Newton had evidence showing that of 32 completely paralysed patients treated, 8 were treated within four hours and 5 of those (64%) made full recoveries. Oppelt was eventually treated 14 hours after injury. The court a quo found the Department 50% liable on the basis that Oppelt had a 64% chance of recovery if treated within four hours. The Department appealed.

• Whether the plaintiff proved on a balance of probabilities that Dr Newton's method of closed reduction within four hours was valid
• Whether the plaintiff established factual causation - that 'but for' the failure to treat him within four hours, he probably would have recovered
• Whether the Department's employees acted wrongfully and negligently in failing to apply the treatment within four hours
• The proper approach to assessing expert medical opinion evidence
• The standard of proof required to establish causation in medical negligence cases

1. The appeal is upheld with costs. 2. Paragraphs 2, 3 and 4 of the order of the court a quo are set aside and replaced with an order dismissing the plaintiff's claim against the first defendant with costs. 3. In both cases the costs are to include the costs of two counsel.

The binding principles are: (1) In medical negligence cases, a plaintiff must prove on a balance of probabilities that the medical theory or treatment method on which the claim is based is valid before it can be established that failure to apply it caused the plaintiff's harm. (2) Factual 'but-for' causation must be established by proving on a balance of probabilities (not certainty or mathematical precision) that the defendant's conduct was probably a cause of the plaintiff's injury, applying a flexible common sense approach. (3) Expert opinion evidence based on the lowest class of scientific data (opinion based on small, non-rigorous samples), without independent corroboration, consensus in the medical literature, or general acceptance in medical practice, is insufficient to prove causation on a balance of probabilities. (4) An expert's opinion must be properly evaluated by examining the reasoning process, including the premises and the reliability of the underlying data - a bald statement of opinion has little probative value. (5) Without proof of factual causation, there is no need to examine wrongfulness and negligence.

The Court noted that even if Oppelt had been treated earlier than 14 hours, it could not be determined on the evidence whether he would have recovered fully or partially. The Court observed that while there was general consensus in the medical world that early intervention was preferable for injuries of the type suffered by Oppelt, there was no consensus as to when such intervention should occur. The Court also noted that the issue of whether Oppelt could reasonably have been treated within four hours, and the reasonableness of the time taken to convey him to Conradie Hospital, became irrelevant once factual causation was not established.

This case is significant for establishing the approach to factual causation in medical negligence cases in South African law. It emphasizes that plaintiffs must prove on a balance of probabilities not only that a treatment would have succeeded, but that the underlying medical theory is valid. The judgment confirms that 'but-for' causation requires proof that the defendant's conduct was probably a cause of the harm, applying a flexible common sense approach. It also reinforces the principles from Coopers v Deutsche Gesellschaft regarding proper evaluation of expert opinion evidence - experts must disclose their reasoning process and the premises from which they reason. The case illustrates that statistical evidence from very small samples, classified as the lowest form of scientific evidence, without corroboration or acceptance in the medical profession, will be insufficient to prove causation. It demonstrates the high threshold for establishing medical negligence where the proposed standard of care is not accepted medical practice.