A patient care system for treating a patient is provided. The patient care system includes a patient transport apparatus, a chest compression system configured to provide automatic chest compressions to a patient, and a retainer for securing the chest compression system to the patient transport apparatus. The patient transport apparatus includes a base, an intermediate frame arranged for movement relative to the base, and a patient support deck which defines a patient support surface. The chest compression system includes a driver having a driver body movably supporting a plunger, and a driver frame to support the driver adjacent to the chest of the patient. The retainer includes a collar releasably engageable with the chest compression system, and a brace including a retainer mount and a tether. The brace is arranged to secure the chest compression system to the intermediate frame of the patient transport apparatus.