• Michael J Feldman, Jane L Lukins, Richard P Verbeek, Russell D MacDonald, Robert J Burgess, and Brian Schwartz.
• Division of Prehospital Care, Sunnybrook and Women's College Health Sciences Center, Toronto, Ontario, Canada.
• Prehosp Disaster Med. 2004 Oct 1;19(4):287-96.

IntroductionEmergency medical services (EMS) responses to mass gatherings have been described frequently, but there are few reports describing the response to a single-day gathering of large magnitude.ObjectiveThis report describes the EMS response to the largest single-day, ticketed concert held in North America: the 2003 "Toronto Rocks!" Rolling Stones Concert.MethodsMedical care was provided by paramedics, physicians, and nurses. Care sites included ambulances, medically equipped, all-terrain vehicles, bicycle paramedic units, first-aid tents, and a 124-bed medical facility that included a field hospital and a rehydration unit. Records from the first-aid tents, ambulances, paramedic teams, and rehydration unit were obtained. Data abstracted included patient demographics, chief complaint, time of incident, treatment, and disposition.ResultsMore than 450,000 people attended the concert and 1,870 sought medical care (42/10,000 attendees). No record was kept for the 665 attendees simply requesting water, sunscreen, or bandages. Of the remaining 1,205 patients, the average of the ages was 28 +/- 11 years, and 61% were female. Seven-hundred, ninety-five patients (66%) were cared for at one of the first-aid tents. Physicians at the tents assisted in patient management and disposition when crowds restricted ambulance movement. Common complaints included headache (321 patients; 27%), heat-related complaints (148; 12%), nausea or vomiting (91; 7.6%), musculoskeletal complaints (83; 6.9%), and breathing problems (79; 6.6%). Peak activity occurred between 14:00 and 19:00 hours, when 102 patients per hour sought medical attention. Twenty-four patients (0.5/10,000) were transferred to off-site hospitals.ConclusionsThis report on the EMS response, outcomes, and role of the physicians at a large single-day mass gathering may assist EMS planners at future events.

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