Plaintiffs seeking to halt a Delaware County hospital’s planned closure did not need to present concrete evidence of irreparable harm to secure a preliminary injunction against the hospital, the Pennsylvania Supreme Court held Wednesday.

Instead, the high court ruled, testimony from the plaintiff’s expert on the harm posed by the hospital’s plans, in conjunction with an irreparable harm provision in a contract between the parties, had provided what appeared to be a reasonable basis for a trial court to grant a preliminary injunction.