Background
Sophia Hemmings suffered cardiac arrest following anesthetic complications during an emergency caesarean section, leaving her with severe and permanent brain damage. Hemmings, through her litigation guardian, and members of her family sued several healthcare practitioners and Scarborough Health Network. The parties agreed on damages, leaving liability as the sole issue at trial.
The trial judge held Dr. Lloyd Gregory Padmore and anesthesiologist Dr. Neil Thomas Jamensky liable. The hospital was held vicariously liable for a nurse’s negligence and directly liable for failing to convey Hemmings’ medical history to the obstetricians attending her delivery. Although the on-duty obstetrician breached the standard of care, the trial judge found that her conduct did not cause Hemmings’ injuries and that the injuries were too remote.
The Ontario Court of Appeal overturned the findings against Padmore and the hospital, concluding that the trial judge had erred in analyzing factual causation and remoteness, but it upheld the judgment against Jamensky. The plaintiffs appealed the dismissal of their claims against Padmore and the hospital, while Jamensky appealed the finding that he was liable.
The Court’s Holding
The Supreme Court dismissed both appeals. A majority upheld the dismissal of the claims against Padmore and the hospital, while six judges upheld Jamensky’s liability. The result was that the Court of Appeal’s disposition remained in place: Padmore and the hospital were not liable, but Jamensky was.
Rowe and O’Bonsawin JJ., with Jamal J. concurring, held that factual causation and remoteness are distinct inquiries. Factual causation ordinarily asks whether, but for the defendant’s breach, the injury would have occurred. Remoteness asks whether the kind of injury suffered was a reasonably foreseeable consequence of that defendant’s breach. The trial judge erred in finding factual causation regarding the nurse without adequately addressing the counterfactual and erred in the remoteness analysis concerning Padmore and the nurse. Given the unchallenged finding that the later-treating obstetrician could not reasonably have foreseen Hemmings’ injuries, the injuries were too remote from Padmore’s and the nurse’s earlier conduct.
The Court upheld Jamensky’s liability because the trial reasons, read functionally and in context, sufficiently disclosed the factual and legal basis for the decision. His negligence was closely connected in time and substance to the administration of general anesthesia and the resulting cardiac arrest, and the causation finding was supported by testimony, expert evidence and medical literature. An express counterfactual analysis was therefore unnecessary. Martin J., joined by Karakatsanis and Moreau JJ., would have restored liability against Padmore; Wagner C.J. would instead have allowed Jamensky’s appeal.
Key Takeaways
- Factual causation and remoteness are separate elements of negligence and should be analyzed independently; the Court preferred “remoteness” over the potentially confusing label “legal causation.”
- The ordinary factual-causation test remains whether the injury would have occurred but for the defendant’s breach, assessed on a balance of probabilities through a robust, common-sense approach.
- An explicit counterfactual analysis may be necessary in complex, multi-defendant cases, but not where the trial judge’s application of the but-for test and rejection of the counterfactual are apparent from the reasons and record.
- Remoteness turns on whether the type of injury represented a real, reasonably foreseeable risk from the particular defendant’s perspective at the time of the breach; foreseeability requires more than a mere possibility but not prediction of the precise sequence of events.
Why It Matters
The decision provides an important restatement of causation doctrine in Canadian negligence law. It directs courts to keep the factual question of what caused an injury separate from the normative question of whether the injury was sufficiently foreseeable to justify liability.
For medical-malpractice and other multi-defendant litigation, the judgment also illustrates when trial reasons must expressly address the counterfactual and how appellate courts should review those reasons. Appellate courts must read reasons generously and contextually, while still intervening when legal errors, unexplained inconsistencies or an unintelligible causal path prevent meaningful review.