An assistant chest respirator consisting of three parts (brace, pressure convertor and vacuum pump) was developed. This respirator was applied to a patient with dyspnea after extirpation of an intramedullary tumor of the cervical spinal cord. Long term respiration control using a Bennett MA-1 respirator frequently results in hazards of tracheal infection and tracheal necrosis induced by compression of the cuff of tracheotomy tube. Our assistant chest respirator was found to be helpful in preventing such hazards.
