• J A Gossage, D P Frith, T W G Carrell, M Damiani, J Terris, and K G Burnand.
• Department of Surgery, St Thomas's Hospital, London, UK.
• Ann R Coll Surg Engl. 2008 Mar 1;90(2):113-6.

IntroductionThe aim of this study was to determine whether mobile phones and mobile phone locating devices are associated with improved ambulance response times in central London.Patients And MethodsAll calls from the London Ambulance Service database since 1999 were analysed. In addition, 100 consecutive patients completed a questionnaire on mobile phone use whilst attending the St Thomas's Hospital Emergency Department in central London.ResultsMobile phone use for emergencies in central London has increased from 4007 (5% of total) calls in January 1999 to 21,585 (29%) in August 2004. Ambulance response times for mobile phone calls were reduced after the introduction of the mobile phone locating system (mean 469 s versus 444 s; P = 0.0195). The proportion of mobile phone calls made from mobile phones for life-threatening emergencies was higher after injury than for medical emergencies (41% versus 16%, P = 0.0063). Of patients transported to the accident and emergency department by ambulance, 44% contacted the ambulance service by mobile phone. Three-quarters of calls made from outside the home or work-place were by mobile phone and 72% of patients indicated that it would have taken longer to contact the emergency services if they had not used a mobile.ConclusionsSince the introduction of the mobile phone locating system, there has been an improvement in ambulance response times. Mobile locating systems in urban areas across the UK may lead to faster response times and, potentially, improved patient outcomes.

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