Stretcher patients suffering from shock and in need of emergency oxygen treatment are given first aid in a man-powered ambulance while they are being taken to a hospital by the Home Guard in England. The vehicle attains a speed of 15 miles per hour, drawing in filtered air as it runs and supplying oxygen from a cylinder so resuscitation can be accomplished without the use of a respirator which may restrict breathing. A bicycle attachment at the rear is pedaled to propel the ambulance, the driver being in position to watch the patient through an observation window. The driving portion can be disengaged and the stretcher wheeled into a ward without disturbing the patient, who may remain within the ambulance if further oxygen treatment is required. With this carrier one man can load a stretcher patient and transport him, a task heretofore requiring the service of several persons.