The appellants sought to add three health care providers as defendants to a medical malpractice action more than two years after the original injury.
The motion judge dismissed the motion on the basis that the limitation period had expired.
The Court of Appeal allowed the appeal, finding that the motion judge applied the wrong test under the Limitations Act, 2002.
The court held that the motion judge failed to make proper findings of fact regarding when the appellants knew or ought reasonably to have known of their claims against the proposed defendants.
The court also found that the motion judge erred in treating lack of due diligence as a standalone ground for finding claims statute-barred.
The key distinction was that the claims against the proposed defendants differed from the claim against the original defendant, as they involved allegations that the health care providers failed to take immediate action once cauda equina syndrome was suspected, information that was only revealed during examinations for discovery in 2015.