Maybe, if you can show that your leave was anticipated and arrangements for it had begun before a strike or lockout started. Being on short-term sick leave before a strike or lockout may show that your leave was anticipated. Inform the employer in writing of the dates of any scheduled surgery and anticipated recovery periods. Be sure to keep a copy for yourself at home.
However, be sure to check with Service Canada to determine whether your circumstances meet their entitlement for sickness benefits.