Ambulance Diversion: The practice of redirecting ambulances and patients seeking urgent care from one emergency department to others for various reasons such as overcrowding and shortage of skilled staff.Ambulances: A vehicle equipped for transporting patients in need of emergency care.Crowding: An excessive number of individuals, human or animal, in relation to available space.Urinary Diversion: Temporary or permanent diversion of the flow of urine through the ureter away from the URINARY BLADDER in the presence of a bladder disease or after cystectomy. There is a variety of techniques: direct anastomosis of ureter and bowel, cutaneous ureterostomy, ileal, jejunal or colon conduit, ureterosigmoidostomy, etc. (From Campbell's Urology, 6th ed, p2654)Biliopancreatic Diversion: A surgical procedure which diverts pancreatobiliary secretions via the duodenum and the jejunum into the colon, the remaining small intestine being anastomosed to the stomach after antrectomy. The procedure produces less diarrhea than does jejunoileal bypass.Emergency Medical Technicians: Paramedical personnel trained to provide basic emergency care and life support under the supervision of physicians and/or nurses. These services may be carried out at the site of the emergency, in the ambulance, or in a health care institution.Air Ambulances: Fixed-wing aircraft or helicopters equipped for air transport of patients.Emergency Medical Service Communication Systems: The use of communication systems, such as telecommunication, to transmit emergency information to appropriate providers of health services.Emergency Medical Services: Services specifically designed, staffed, and equipped for the emergency care of patients.Transportation of Patients: Conveying ill or injured individuals from one place to another.Urinary Reservoirs, Continent: Structures which collect and store urine and are emptied by catheterization of a cutaneous stoma or internal diversion to the urethra. The reservoirs are surgically created during procedures for urinary diversion.Allied Health Personnel: Health care workers specially trained and licensed to assist and support the work of health professionals. Often used synonymously with paramedical personnel, the term generally refers to all health care workers who perform tasks which must otherwise be performed by a physician or other health professional.Colostomy: The surgical construction of an opening between the colon and the surface of the body.Cystectomy: Used for excision of the urinary bladder.