What is the limitation period for a plaintiff to sue for loss of hearing?

In Carreno v. Park 2010 ABQB 36 (Master) the injury suffered was a loss of hearing after a medical procedure. The court found that the claimant did not need to know precisely what went wrong and therefore know exactly which of the participants in the procedure was liable. The court used the analogy of a multi-vehicle motor vehicle accident where the particulars of negligence of the various operators of the motor vehicles are not necessarily known until discovery has been completed. With the acquisition of the names of the owners and operators, the claimant would have all that was needed to commence the running of the limitation period. Therefore, the court found that the plaintiff knew who had participated in the failed operation and could have commenced her action.