Miems, part 2: The Maryland emergency medical services communications system.
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Emergency Medical Services↗
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Results for “Emergency Medical Service Communication Systems”
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Systems approaches in emergency medical services: the history, the impact, and the future.
Systems approaches have been important in planning and evaluating emergency medical services (EMS) systems. However, maximal use of systems approaches are limited by small political boundaries, the lack of user-friendly systems tools, and the need for EMS planning staffs who are familiar with these systems tools. Developing technology, particularly communications, will continue to have a great impact on EMS delivery. In addition, the need is seen for continuing advances in systems concepts, and in particular, the promotion and incorporation of health and prevention of injury as systems concepts.
Emergencies↗
[Use of computer technics in the management of first aid stations].
Computer-based management system for emergency aid stations of Vologda is discussed. Principles of data collection, processing and storage are presented. Automatic data processing of Ministry Forms N 110/Y and 114/Y assists in solving most urgent problems. Information is supplied rather quickly, in a convenient form and is reliable. Multi-Level data application is medically, socially and economically effective. The system functions without drawing the staff of electronic engineers and programmers. Its introduction hasn't resulted in additional increase in the staff of medical statisticians.
Community Health Centers↗
The Maryland emergency medical services system: an update.
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Emergency Medical Service Communication Systems↗
HMOs and utilization of emergency medical services: a metropolitan survey.
A survey was conducted of a diverse group of health maintenance organizations (HMOs) serving a large metropolitan area regarding enrollee instructions for use of emergency medical services. Written and verbal requests for written information concerning emergency medical system instructions for enrollees were made to the 25 largest HMOs serving Chicago and surrounding suburbs. Sixteen responses, representing more than 95% of total HMO enrollees, were obtained. Options for access for prehospital care were reviewed and categorized: call 911, call toll-free telephone number, call HMO office or primary physician, go to the nearest HMO-affiliated hospital, and go to the nearest hospital. Of the 16 respondents, 15 HMOs responsible for 99% of the total HMO enrollees advised their subscribers to contact their HMO office or primary physician or to call a toll-free number in the case of an emergency. No HMO advised use of the 911 access as a first response for an emergency. Only two HMO brochures, responsible for 7% of the total HMO enrollees, recommended that 911 access be used. These data suggest that HMO enrollees may not be adequately informed regarding proper use of 911 and the emergency medical services system.
Chicago↗
Innovations in emergency medical services systems.
This article roughly follows the chronology of an EMS call and discusses innovations in prehospital care, including epidemiology and prevention; precall management (system status management and flexible response); intervention during the call (emergency medicine dispatch); finding the scene; and communications.
Computers↗
Monitoring EMS protocol deviations: a useful quality assurance tool.
STUDY OBJECTIVE: To determine the incidence, type, and outcome of protocol deviations in an emergency medical services (EMS) system. DESIGN: Retrospective consecutive case series. SETTING: Seven advanced life support ambulance services servicing five area hospital emergency departments. PATIENTS: 1,246 patients requiring advanced life support care. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Advanced life support ambulance runs during a two-month period were examined for protocol deviations. Of 1,246 runs examined, 16% had deviations. Approximately 55% of these deviations were minor, 38% were serious, and 7% were very serious in nature. The effects of the errors were evaluated using hospital records. Results showed that 89.5% of patients were unaffected, 5.0% improved, and 5.5% suffered complications from deviations. Emergency medical technicians committed 69% of the deviations without the consent of medical control, medical control committed an additional 18%, and both were responsible in 13% of cases. Incomplete histories were found in 8% of cases. CONCLUSION: Protocol deviations committed in prehospital care do not usually cause direct harm to patients. On review of these deviations, however, several disturbing trends were uncovered, including misconceptions in the use of IV therapy, a number of serious deviations in advanced cardiac life support protocols, and lack of communication with medical control. This type of quality assurance study has the ability to identify areas of strength and weakness in an EMS system, allowing planning of ongoing educational efforts in the system.
Clinical Protocols↗
[Prehospital care of victims of traffic accidents (First Aid Medical Service of the Highway Development Corp.)].
The University of São Paulo School of Medicine was the pioneer in the emergency attendance of traffic accident victims first at the Santa Casa de Misericordia Emergency Ward and later at the Emergency Ward of the Hospital das Clínicas. The University of São Paulo School of Medicine has also inaugurated the pre-hospital medical management of traffic accident victims through the DERSA First Aid Medical Service that operates permanent ambulance units staffed with a driver and a first aid medical technician working in 8 hours shifts, located at every 30 to 40 km on highways under DERSA jurisdiction. Once this mobile unit is summoned it takes an average of 3 to 8 minutes to reach the accident site where the first aid medical technician gives the initial medical assistance, being the victim thereafter removed to a hospital facility in about 6 to 14 minutes. An analysis of the evolution during the hospitalization of traffic accident victims showed that 86.3% of the patients were discharged after the initial attendance and 13.7% remained hospitalized. In the next section the authors present the "working philosohy" and report on the facilities available for assistance of politraumatized patients on the higways under DERSA jurisdiction (Anchieta-Imigrantes; Anhanguera-Bandeirantes and Trabalhadores Systems) within São Paulo state.
Accidents, Traffic↗
Amateur radio communications and the National Disaster Medical System.
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Disaster Planning↗
[The emergency telephone number--the essential weak link in an emergency system. Prospective studies involving cardiac arrests observed by bystanders].
The first link in the "chain of survival" concept is the activation of the emergency medical system (EMS) by a bystander after recognition of cardiac arrest (CA) or its immediate prodrome. Our ongoing study is aimed at evaluating the current effectiveness of bystander EMS activation for all cases of CA in the city and area of Mainz. Methods. Starting February 1991, we began to prospectively examine collapse-intervention intervals in all cases of CA treated by our physician-manned ambulance. Precision voice recorders carried by the ambulance crews are activated and linked to the EMS dispatcher to time the arrival of the ambulance vehicle. Time intervals starting from the time of collapse are then reconstructed from the dispatcher's time and the tapes. The emergency phone number dialled initially by the bystander and the time of collapse in witnessed cardiac arrests are identified. RESULTS. Sixty-six CAs were witnessed and included in this study. In 20% of those cases, the number dialled initially by the bystander was 19222 (EMS dispatcher), in 38% 110 (police), and in 42% other numbers (family practitioners or their on-call service, fire department). The time interval, as median (25th percentile; 75th percentile), between collapse and receipt call by the emergency dispatchers was 4 min (2; 8) for all patients (n = 66), and 6.5 min (3; 12) whenever numbers other than emergency phone numbers were dialled. All following time intervals (start of BLS or ACLS procedures) showed differences (P less than 0.05) between the 110 or 19222 group [BLS: 8.5 min (4.8; 13.1) or 10 min (7.35; 12.1); ACLS: 11.3 min (9.1; 13.45) or 12.9 min (10.6; 21.5)] vs the group, in which other phone numbers were initially dialled [BLS: 15.25 min (9.25; 19.4); ACLS: 20.11 min (12.6; 28.3)]. The first ECG rhythm showed VF in 56% and 54% in case 110 and 19222 were dialled, but only in 32% in the other group. CONCLUSION. Even one single weak link in the "chain of survival" can lower overall survival rates. An indispensable, but apparently underrated component of an effective EMS includes an informed citizenry able to call swiftly for help. Lack of an unequivocal emergency number, well known and accepted by the citizens, produces confusion and delays. In our systems, the correct medical emergency phone number (19222) was dialled in 20% of the cases only, thus demonstrating clearly the lack of public awareness of this 5-digit number. In a higher percentage, the three-digit police number (110) was dialled. In cases where numbers other than emergency numbers were dialled (42%), the longest time intervals between collapse and receipt of call by the dispatchers occurred, associated with the longest time intervals until initiation of CPR and the lowest percentage of patients found in ventricular fibrillation. We conclude that establishment of a simple three-digit EMS phone number, preferentially Europe-wide, in combination with an intensification of public awareness, could be a vital step not only to reduce time intervals between collapse and CPR in our EMS system but also to improve survival.
Emergency Medical Service Communication Systems↗
[Activities of mobile emergency units in Ghent].
We present here the analysis of the activities of the mobile intensive care unit of the university hospital of Ghent in 1984. The call for medical intervention from the unit originated in most cases from the 900 centre. Trauma and cardiac arrest were the most frequent reasons for intervention. The majority of the interventions of the mobile unit were needed for patients at home. These data illustrate the need for orienting the medical emergency care systems towards patients at home.
Ambulances↗
Effect of standing orders on field times.
Because of discontinuation of base hospital participation, paramedics in a large urban zone of a California emergency medical services (EMS) system serving 1.1 million persons went on emergency standing orders for nearly all calls requiring advanced life support. Subsequently, the base hospital resumed medical control function under limited standing orders. Standing orders were allowed for calls that required rapid intervention with little probability of morbidity. The EMS agency conducted a retrospective study to compare times at scene and total prehospital care times before (control group) and after institution of standing orders and limited standing orders. There were significant differences in total prehospital care times and at-scene times between the control group and the two standing order groups (P less than .01). There are important implications to EMS systems that use extensive base hospital contact.
Ambulances↗
Advances in pre-hospital care: the technology of emergency medical services.
These four examples of technology and its relationship to pre-hospital care will be reviewed: portable defibrillators, pneumatic antishock garment, 911 systems with computer-aided dispatch, and aeromedical transport.
Aircraft↗
Mass casualty incident. Integration with prehospital care.
Mass casualty incident involves the use of limited resources for multiple casualties. The emergency physician must be familiar with both prehospital and hospital plans for mass casualty care in order to facilitate optimal care and to maintain the continuum from field care to definitive treatment. It is essential that the emergency physician become involved in the disaster planning processes to ensure that the victims receive the best care available under the circumstances and that the safety and emotional well-being of both prehospital and hospital personnel are assured. Emergency physicians involved in prehospital care should be certain that the local EMS system has adequate training and chances to update their skills and knowledge. Disaster drills of the EMS system are excellent ways to practice, to identify weaknesses, and for preplanning to enhance disaster medical care.
Disaster Planning↗
[Electronics against fear, emergency call systems for the elderly].
When in a critical situation, the elderly persons living alone at home often can no longer make a telephone call for help. An electronic system for emergency calls is helpful and can even save lives. The system permits to the elderly people to live alone in their homes.
Activities of Daily Living↗
Medical direction in emergency medical services: the role of the physician.
The past two decades has seen the development of sophisticated systems of prehospital care. The task now is to intensify the input of well-trained physicians into all aspects of EMS systems. This article tracks the history of EMS in this country and provides some suggested answers to the difficult questions facing this new specialty.
Clinical Competence↗
Characteristics of midsized urban EMS systems.
Emergency medical services (EMS) systems in 25 midsized cities (population, 400,000 to 900,000) are described. Information describing EMS system configuration and performance was collected by written and telephone surveys with follow-ups. Responding cities provide either one- or two-tier systems. In a one-tier system, an advanced life support (ALS) unit responds to and transports all patients who use 911 to activate the system. Three types of two-tier systems are identified. In system A, ALS units respond to all calls. Once on scene, an ALS unit can turn a patient over to a basic life support (BLS) unit for transport. In system B, ALS units do not respond to all calls; BLS units may be sent for noncritical calls. In system C, a nontransport ALS unit is dispatched with a transporting BLS unit. For ALS calls, ALS personnel join BLS personnel for transport. Overall, cities staff an average of one ambulance per 51,223 population. One-tier systems average one ambulance per 53,291 compared with two-tier systems, which average one ambulance per 47,546. In the two-tiered system B, the average ALS unit serves 118,956 population. In the 60% of cities that use a one-tier system, one ALS unit serves 58,336 (P less than .0005). Overall, the code 3 response time for all cities is an average of 6.6 minutes. The average response time of two-tier systems is 5.9 minutes versus 7.0 minutes for one-tier systems (.05 less than P less than .1). These data suggest that the two-tiered system B allows for a given number of ALS units to serve a much larger population while maintaining a rapid code 3 response time.
Ambulances↗
Personal emergency response systems.
A personal response system is a signaling device that summons help during an emergency. Although personal response systems vary widely, there are three components. The first component is the electronic hardware in the home, which consists of portable and installed sensors and the control console. The second component is the emergency response center, which is either provider-based or manufacturer-based. The third component involves the dispatch of appropriate assistance. The primary users of personal response systems are women in their seventies and eighties who live alone and who have cardiac and musculoskeletal problems, which make them prone to falls. The frequency of personal response system use varies from an average of 0.44 to 0.84 emergencies per subscriber per year. Program coordinators believe that personal response systems help to delay institutionalization, reduce admissions to hospitals, substantially shorten hospital stays, and reduce the duration of home attendant services. The most favorable impact of the personal response system has been its psychologic value to the users and their families.
Aged↗