Relevance of the 112-emergency calls among the clientele of the emergency department of the Herlev hospital admitting office]

It is a common view, shared by Emergency Department staff and ambulance crews, that a large number of patients unnecessarily use Emergency Service ambulances instead of transporting themselves to the hospital by other, more appropriate means. In this retrospective study, 528 consecutive Emergency Service calls to the Herlev Hospital Casualty/Emergency Department during a six week period were reviewed for relevance. Attention was solely aimed at the relevance of the use of Emergency Service ambulances in each case, but not on patient or health care providers' perception of urgency. All calls resulting in admission to hospital were pre-defined as being relevant. Seventeen point six percent of all calls were deemed irrelevant. Thirty-three percent of all calls not resulting in admission were deemed irrelevant. The results confirm Emergency Department health care providers' and ambulance crews' view that Emergency Service ambulances are used inappropriately by the public.     

Direct admission to the coronary care unit by the ambulance service for patients with suspected myocardial infarction

BACKGROUND: Direct access to the coronary care unit (CCU) for general practitioner (GP) referred cases of suspected acute myocardial infarction (AMI) (fast track admission) substantially reduces the time to thrombolysis. Until now, this policy has been confined to GP referrals. OBJECTIVES: To determine the time taken to admission to CCU under the fast track policy (ambulance referrals and GP referrals) and the time taken to start administration of thrombolytics (ambulance referrals, GP referrals, and accident and emergency referrals). METHODS: Fast track admission policy was extended to include referrals from ambulance personnel who respond to emergency service calls. Ambulance personnel referred cases were also examined to see if they were referred appropriately to the CCU. RESULTS: 100 ambulance personnel referrals and 260 GP referrals to CCU with chest pain were studied. Forty accident and emergency referrals who had AMI requiring thrombolysis were also studied. In the ambulance referred group the time to admission from phone call was a median of 10 minutes (range 2 to 45), a saving of 30 minutes compared with GP referrals (median 40 minutes, range 2 to 217). The median diagnostic electrocardiogram (ECG) to thrombolysis time was longer in the accident and emergency referrals with AMI than either ambulance referrals or GP referrals admitted under the fast track policy. Diagnostic ECG to thrombolysis time: accident and emergency 50 minutes (range 15 to 385); ambulance referrals median 33 minutes (range 6 to 69); GP referrals median 29.5 minutes (range 5 to 110 minutes); (p = 0.056 accident and emergency compared with ambulance referrals, p < 0.002 accident and emergency compared with GP referrals). Of 100 ambulance referrals 52 patients exhibited symptoms suggestive of ischaemic heart disease (confirmed AMI, unstable angina, and angina) and a further 18 patients were required to stay in CCU for other cardiac problems. Thus a total of 70 (70%) were considered appropriate compared with 155 of 260 (55.8%) GP referred cases. CONCLUSIONS: Extending the fast track admission policy to ambulance personnel reduces delay to admission for patients with suspected MI without adversely affecting the appropriateness of admissions.     

Mode of referral to hospital of patients with heart attacks: relevance to home care and special ambulance services

Out of 1250 consecutive patients brought to hospital with heart attacks 956 (76%) were at home when their symptoms began. Of these, 587 (61%) called their general practitioner, and for the remainder an ambulance was summoned by a member of the public. Of the 294 patients who were away from home when the attack occurred 291 were brought to hospital by ambulance. Of these, only 70 (24%) were attended by a general practitioner. Patients for whom ambulances were called by a general practitioner had had their symptoms significantly longer and had significantly lower prehospital and hospital mortalities than those for whom ambulances were summoned by members of the public. Special "cardiac" ambulances appear to be inappropriate for patients who have been seen by a general practitioner, and for this group home care may well be as effective as hospital admission.     

Ambulatory visits to hospital emergency departments. Patterns and reasons for use. 24 Hours in the ED Study Group

OBJECTIVES: To characterize the reasons ambulatory patients use hospital emergency departments (EDs) for outpatient care and to determine the proportion of ED patients who initially are assessed as having nonurgent conditions, but subsequently are hospitalized. DESIGN: Cross-sectional survey during a single 24-hour period of time. SETTING: Fifty-six hospital EDs nationwide. PATIENTS OR OTHER PARTICIPANTS: Consecutive ambulatory patients presenting for care. Patents who arrived by ambulance were excluded. RESULTS: Of 6441 ambulatory patients (79 percent of all ED visits) who were eligible for study, interviews were obtained from 6187 (96 percent). A total of 5323 patients (86 percent) had clinical reasons or preferences for seeking care at an ED, including 2799 (45 percent) who thought they had an emergency or an urgent condition or were too sick to go elsewhere. Nineteen percent (n=1199) reported that they were sent to the ED by a health care professional. Patients with a regular clinician or with insurance cited similar reasons for seeking care at an ED. A total of 3062 patients (50 percent) cited 1 or more nonfinancial barriers to care as an important reason for coming to the ED, and 949 (15 percent) cited financial considerations. A total of 3045 patents (49 percent of ambulatory patients and 37 percent of total ED visits) were assessed at triage as having a nonurgent condition; 166 of them (5.5 percent; 95 percent confidence interval, 4.7 percent-6.3 percent) were admitted to the hospital. CONCLUSIONS: Most ambulatory patients seek care in an ED because of worrisome symptoms or nonfinancial barriers to care. Although many ambulatory patients appear to have nonurgent conditions based on triage classification, a small but disturbing percentage of nonurgent patients are hospitalized.     

Patterns of hearing loss in non-explosive blast injury of the ear

OBJECTIVE: To characterize ambulance utilization in a pediatric population and pediatric emergency physicians' judgement of the medical need for ambulance transport. METHODS: A convenience sample of ambulance transports were studied prospectively during a 5-week period. Exclusion criteria included transfer from another medical facility, study physician not available, need for immediate resuscitation, or trauma team activation. A questionnaire completed by the physician assessed medical need for the ambulance based on chief complaint, general appearance, vital signs, and ambulance run sheet information. A separate questionnaire was administered to the parents regarding reasons for ambulance use and other available means of transportation. Caregivers were contacted by telephone 2-3 days later to determine the mode of transportation home and the clinical outcome. RESULTS: Of 172 eligible patients, 92 (53%) were enrolled. Most (61%; 56/92) transports were considered medically unnecessary. Interestingly, 40% (37/92) of the subjects had no other means of transportation; 86% (32/37) of ambulance transports for this group were judged medically unnecessary. Overall, 86% (79/92) of families had not called their physician. There was no association between having spoken with the physician and medical need for an ambulance. Many (82%; 46/56) Medicaid transports were judged medically unnecessary Overall, follow-up was achieved for 91% (85/92) of the patients. No patient for whom transport was medically unnecessary had a repeat ED visit for the same complaint or required admission. Most patients (74%; 68/92) returned home without any assistance. Among the medically unnecessary transports, 52% (32/60) of the caregivers cited no other means of transportation, yet 34% (11/32) of these patients returned home by private car. CONCLUSIONS: Most pediatric ambulance transports in this sample, which excluded patients requiring immediate resuscitation or trauma team care, were judged to be medically unnecessary. Caregivers often use an ambulance as a convenience or as the only means of transportation. An alternate, less resource-intensive transportation system may be more appropriate for this population.     

Oral anticoagulation in dental surgery

STUDY OBJECTIVES: To evaluate whether pediatric or emergency medicine residents exhibit a bias when they select patients from triage based on the chief complaint, ie, medical versus surgical in the pediatric emergency department (PED). DESIGN: A retrospective chart review of a convenience sample of consecutive patients, excluding those seen during times when both pediatric and emergency medicine residents were not simultaneously present. SETTING: Urban Municipal PED with 25,000 visits annually. TYPE OF PARTICIPANTS: Pediatric residents, emergency medicine residents, and medical students rotating through the PED and their supervising attending physicians. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Five hundred and ninety-nine charts were included in the study. On the basis of the triage complaint the initial diagnosis was classified as either surgical or medical. Surgical diagnoses were assigned to those patients who required a surgical procedure, involved a surgical subspecialty or were victims of trauma and represented 151 (25.2%) of the patients seen. Medical diagnoses were assigned to the nonsurgical patients and represented 448 (74.8%) of the patients seen. There are roughly three pediatric residents to each emergency resident working in our PED. Of the 367 patients seen by the pediatric residents, 73 (19.9%) had surgical diagnoses, and 294 (80.1%) had medical diagnoses. Of the 158 patients seen by the emergency residents, 59 (37.3%) had surgical diagnoses and 99 (62.7%) had medical diagnoses. chi2 analysis was used to compare categorical variables. The P value was considered significant at <0.05. DISCUSSION: Residents, both pediatric and emergency medicine, were instructed to see patients based upon the severity of the patient illness as judged by the triage nurse unless the patients' illnesses were of equal severity, in which case they were to be seen in the order in which they presented. The null hypothesis was that in the absence of physician bias, both pediatric and emergency medicine residents would see the same proportion of surgical and medical patients. The results showed that a bias exists. Emergency medicine residents saw a greater proportion of surgical patients, and pediatric residents saw a greater proportion of general medical patients. A limitation of this study may be the that the supervising attending physician selected residents to see certain patients to expedite PED flow. CONCLUSIONS: Recognizing that bias in the selection of patients seen exists is important in ensuring a balanced education experience.     

Prospective assessment of triage in an urban emergency department

BACKGROUND: This study examined the effectiveness of a triage system based on patient complaints, medical history, vital signs, and triage nurse impression. Measurements included recognizing patients needing admission, in correlating with disposition, and its effectiveness in all age groups. METHODS: Data were collected prospectively on all patients coming to a general emergency department (ED) of an urban teaching hospital from October 1, 1992, through November 30, 1992. Data included assigned triage acuity, disposition waiting time to physician examination, and disposition, as well as return to the ED within 2 weeks. The patients were divided into age groups: 0 to 16 years, 17 years to 25 years, 25 years to 50 years, 50 years to 65 years, and >65 years of age. RESULTS: There were five patients (n = 4,993, 0.4%) who were triaged nonemergently and subsequently admitted. The sensitivity and specificity of an assigned triage 3 acuity assignment in correlating with lack of admission were 99% and 56%, respectively. Mean waiting time to physician examination was 61 +/- 14 minutes for triage 1, 129 +/- 19 for triage 2, and 182 +/- 22 for triage 3. Mean time to admission from sign-in was 246 +/- 10 minutes for triage 1 and 372 +/- 16 minutes for triage 2. CONCLUSIONS: This triage system accurately correlated with disposition and determined waiting time to examination.     

Obstetric flying squad service-a defence

Eighty-one calls made by the obstetric flying squad in West Berkshire were assessed on the basis of a suggestion that patients would do as well, if not better, if they were brought straight to hospital by ambulance rather than await the arrival of the flying squad. Of the 81 calls, 36 were made to general-practitioner maternity units and 45 were made to patients' homes. In both groups, the flying squad service was considered to be still of great value. Though slightly slower than an emergency ambulance call, it represents a much safer method of transporting an obstetric patient in an emergency.     

Stability of human urinary gonadotropin peptide

OBJECTIVE: To examine the effect of full implementation of advanced skills by ambulance personnel on the outcome from out of hospital cardiac arrest. SETTING: Patients with cardiac arrest treated at the accident and emergency department of the Royal Infirmary of Edinburgh. METHODS: All cardiorespiratory arrests occurring in the community were studied over a one year period. For patients arresting before the arrival of an ambulance crew, outcome of 92 patients treated by emergency medical technicians equipped with defibrillators was compared with that of 155 treated by paramedic crews. The proportions of patients whose arrest was witnessed by lay persons and those that had bystander cardiopulmonary resuscitation (CPR) were similar in both groups. RESULTS: There was no difference in the presenting rhythm between the two groups. Eight of the 92 patients (8.7%) treated by technicians survived to discharge compared with eight of 155 (5.2%) treated by paramedics (NS). Of those in ventricular fibrillation or pulseless ventricular tachycardia, eight of 43 (18.6%) in the technician group and seven of 80 (8.8%) in the paramedic group survived to hospital discharge (NS). For patients arresting in the presence of an ambulance crew, four of 13 patients treated by technicians compared with seven of 15 by paramedics survived to hospital discharge. Only two patients surviving to hospital discharge received drug treatment before the return of spontaneous circulation. CONCLUSIONS: No improvement in survival was demonstrated with more advanced prehospital care.     

Acute emergency service in Reykjavik

The cardiac arrest survival rate has improved since the emergency ambulance service manned by specially trained paramedical personnel and doctors was introduced in Iceland. As the response time has been reduced, specific resuscitation measures can be applied sooner.     

Must the accident victim be protected from the emergency physician?

Quality control in preclinical medical care has become a matter of concern in recent years. In order to evaluate the quality of treatment one has to set standards. Most of the current standards were defined by different preclinical care organisations and are also accepted in the unique emergency medical care protocol used in the Federal Republic of Germany. Considering these standards, we retrospectively analyzed the preclinical treatment of all multiple trauma patients admitted to our department between 1985 and 1996. The major issues of this analysis were the diagnoses, the indications for invasive measures and the performance. Regarding the triage, for example, it was noted that 28% of patients who should have been admitted to a level I trauma center considering the severity of their injury were first admitted to a level III hospital and needed to be transferred later. In 7% of patients two additional mistakes and in 4% of patients more than two mistakes in the triage were noted. On the other hand, there are records of patients who were considered to be only slightly injured but received invasive treatment. Preclinical intubation and mechanical ventilation was not performed in 16.5% although the severity of injury clearly demanded it. A thoracic drain tube was not positioned in 38% of patients suffering from severe thoracic trauma (AISThorax > or = 4). Insufficient application of resuscitation volume (< 2500 ml on admission) was evident in 17% of all documented patients. According to our results, the initial evaluation of severity of injury is still a major problem and leads to wrong decisions for treatment. Although the qualification of ambulance physicians has been standardized for some years, there are still clear deficits in the preclinical management of trauma patients that need to be targeted.     

Demonstration of the feasibility of emergency department immunization against influenza and pneumococcus

STUDY OBJECTIVE: To demonstrate the feasibility of systematic immunization against influenza and pneumococcus in a public emergency department. METHODS: This was a demonstration project conducted from October 21, 1996, through December 2, 1996, at Cook County Hospital, an inner-city hospital with a 1996 adult ED census of 120,449. Seventy-eight percent of patients are uninsured; 92% are people of color; 73% deny having a primary physician. Only 15% have emergency complaints. Nurses received standing orders that all nonemergency adult patients meeting Centers for Disease Control and Prevention criteria for high risk should be offered immunization against influenza and pneumococcus at triage. Cash prizes were offered to nurses appropriately immunizing the most patients. The date of immunization was entered into the computerized patient registration system, available to all providers within the county system. From November 4 through November 18, an extra nurse was assigned to triage to test for improvement in immunization rates. A time-motion study determined the time required per immunization on the basis of a convenience sample of 8 nurses drawn from all 3 shifts. RESULTS: Only 3% of identified high-risk patients reported previous pneumococcal immunization. Despite extreme variation in nurse performance, 2,631 patients (24% of patients triaged) were screened, and 716 high-risk patients were identified (27% of patients screened). A total of 1234 patients were immunized against influenza, and 241 patients were appropriately immunized against pneumococcus. Sixty-one percent of high-risk patients with no contraindication to influenza immunization were immunized against influenza. Thirty-five percent of high-risk patients not previously immunized against pneumococcus were immunized against pneumococcus. Immunizations per shift per triage nurse varied from 0 to 24. Median time for all activities related to immunization was 4 minutes (range, 2 to 10 minutes). There was no increase in immunization rates with the addition of an extra nurse at triage (95% confidence interval for odds ratio, .929 to 1.153). CONCLUSION: Systematic immunization against influenza and pneumococcus is both needed and feasible in a public ED. "Buy-in" by nurses is variable. Increased staffing alone does not improve immunization rates.     

After-hours telephone coverage: the application of an area-wide telephone triage and advice system for pediatric practices

BACKGROUND: After-hours telephone calls are a stressful and frustrating aspect of pediatric practice. At the request of private practice pediatricians in Denver, a metropolitan area-wide system was created to manage after-hours pediatric telephone calls and after-hours patient care. This system, the After-Hours Program (AHP), uses specially trained pediatric nurses with standardized protocols to provide after-hours telephone triage and advice for the patients of 92 Denver pediatricians, representing 56 practices. OBJECTIVES: This report describes the AHP, presents data from 4 years' experience with the program, and describes results of our evaluation of the following aspects of the program: subscribing physician satisfaction, parent satisfaction, the accuracy and appropriateness of telephone triage, and program costs. METHODS: After-Hours Program records (including quality assurance data) for all 4 years of operation were retrospectively reviewed, tabulated, and analyzed. The results of two subscribing physician surveys and one parent caller satisfaction survey are presented. A retrospective review of after-hours patient care encounter forms assessed the necessity for after-hours visits triaged by the AHP. An analysis of the total cost of this program to 10 randomly selected subscribing physicians was conducted using current AHP data and a survey of the 10 physicians. RESULTS: In 4 years, 107,938 calls have been successfully managed without an adverse clinical outcome. Minor errors in using protocols occurred in one call out of 1450 after-hours calls. After-hours phoen calls necessitated an after-hours patient visit 20% of the time and generated one after-hours hospital admission out of every 88 calls. Just over half of the patients were managed with home care advice only, and 28% were given home care advice after-hours and seen the next day in the primary physician's office. Of all patients directed by the telephone triage nurses to be seen after hours, 78% were determined to have a condition necessitating after-hours care. Data are presented regarding call volumes by time of day, day of week, patient age, and patient's initial complaint. The 6 most common complaints accounted for more than one half of the calls, and 38 complaints accounted for more than 95% of all after-hours calls. Utilization by subscribing physicians is described. Satisfaction among subscribing pediatricians was 100%, and among parents was 96% to 99% on a variety of issues. The total cost to participating Denver pediatricians (which includes revenues "given up" as a result of not seeing patients after hours) ranged from 1% to 12% of their annual net income, depending on a variety of factors. CONCLUSIONS: Large-scale after-hours telephone coverage systems can be effective and well-received by patients, parents, and primary physicians. Data presented in this report can assist in planning the training of personnel who provide after-hours telephone advice and triage. Controversies associated with this type of program are discussed. Suggestions are made regarding the direction of future programs and research.     

Cognitive task analyses for decision centred design and training

This paper presents three case studies of Cognitive Task Analysis (CTA) for defining systems design and training requirements. The approach taken involves a modification of the critical decision method of Klein et al. The authors utilized the revised CDM to obtain information from expert white-water rafting guides, general aviation pilots, and emergency ambulance dispatchers. The information obtained was used to develop multi-media tools for training rafting guides and general aviation pilots, and to redesign the VDU display requirements for the ambulance dispatchers. The examples demonstrate the utility of an approach to CTA that is closely based on relevant theory, and provides guidance to practitioners wishing to apply CTA techniques.     

Use of emergency departments by elder patients: a five-year follow-up study

OBJECTIVE: To compare the use of emergency medical care by elders in the United States in 1995 with that previously described for 1990. METHODS: A computerized billing database of 88 EDs in 21 states was retrospectively reviewed for 1995, comparing elder and nonelder patients, estimating national use of emergency medical services by elders, and comparing the 1995 data with previously published results for 1990. RESULTS: From 1990 to 1995, the number of ED visits in the United States increased from 92 million to 100 million. The number of visits made by patients aged 65 years or older increased from 13,639,400 (15%) to 15,666,300 (15.7%), but this increase did not reach statistical significance (p = 0.17). The admission rate for elder ED patients increased from 32% to 46% over the five-year interval (p<0.01). This represents more than 7 million hospital admissions for elder patients in 1995. The rate of intensive care unit (ICU) admission for elders decreased from 7% to 6% over the five-year interval (p = 0.56), compared with 1.3% for nonelder patients for both years. Thirty percent of elder ED patients arrived by ambulance in 1990, compared with 33% in 1995 (p = 0.02). Based on 1995 data, elders comprised 39% of patients arriving by ambulance [odds ratio (OR) 4.75, 95% confidence interval (CI) = 4.71 to 4.79], 43% of all admissions (OR 6.59, 95% CI = 6.54 to 6.64), and 47% of ICU admissions (OR 5.00, 95% CI = 4.91 to 5.09). The comparable ORs in 1990 were 4.4, 5.6, and 5.5, respectively. CONCLUSIONS: From 1990 to 1995, the overall number of ED visits increased. The rate of increase was somewhat greater for elder patients. The use of ambulance services also disproportionately grew among elder patients, as did the rate of hospital admission. The overall rate of ICU admission was stable, but actually fell modestly for elder patients. Of these changes, only the increase in the rate of hospital admission for elders reached statistical significance.     

A comprehensive, high-resolution genomic transcript map of human skeletal muscle

BACKGROUND: Because the number of patients on the waiting list for transplantation is increasing and the stagnation in the number of organs donated has led to a more restrictive listing for transplantation, an increased fraction of patients needs to be bridged mechanically. We examined the hypothesis that selection of these patients with regard to urgency status is critical in determining outcome. METHODS: A cohort of 631 patients referred for transplantation to our center between January 1, 1990, and December 31, 1996, was analyzed. Two hundred ninety-seven patients were listed for transplantation and 157 were given transplantation. Forty-one patients had to undergo ventricular assist device implantation (n=34, Novacor; n=6, TCI Heartmate; n=1, Medos), 39 for bridging to transplantation and 2 for permanent support. Initial transplantation evaluation data were analyzed in 3 subgroups (elective bridging, urgent bridging, emergency bridging) and compared with another and with other patients referred for transplantation, specifically those who did not have to be bridged on the waiting list. RESULTS: Patients who underwent elective or urgent assist device bridging were younger and more compromised than the rest of patients accepted on the waiting list (higher functional class, lower mean arterial pressure, lower cardiac index, lower serum sodium, higher pulmonary capillary wedge pressure). In the elective group, overall survival including perioperative mortality rate was better than in the urgent/emergency group and at least as good as in patients who were stable on the waiting list and did not undergo heart transplantation during follow-up. This should prompt cardiologists and cardiac surgeons to consider assist device implantation earlier.     

A clinical trial of a financial incentive to go to the tuberculosis clinic for isoniazid after release from jail

PURPOSE: To assess the effect of insurance status on the probability of admission and subsequent health status of patients presenting to emergency departments. SUBJECTS AND METHODS: We performed a prospective cohort study of patients with common medical problems at five urban, academic hospital emergency departments in Boston and Cambridge, Massachusetts. The outcome measure for the study was admission to the hospital from the emergency department and functional health status at baseline and follow-up. RESULTS: During a 1-month period, 2,562 patients younger than 65 years of age presented with either abdominal pain (52%), chest pain (19%) or shortness of breath (29%). Of the 1,368 patients eligible for questionnaire, 1,162 (85%) completed baseline questionnaires, and of these, 964 (83%) completed telephone follow-up interviews 10 days later. Fifteen percent of patients were uninsured and 34% were admitted to the hospital from the emergency department. Uninsured patients were significantly less likely than insured patients to be admitted, both when adjusting for urgency, chief complaint, age, gender and hospital (odds ratio = 0.5, 95% confidence interval 0.3 to 0.7), and when additionally adjusting for comorbid conditions, lack of a regular physician, income, employment status, education and race (odds ratio = 0.4, 95% confidence interval 0.2 to 0.8). However, there were no differences in adjusted functional health status between admitted and nonadmitted patients by insurance status, either at baseline or at 10-day follow-up. CONCLUSIONS: Uninsured patients with one of three common chief complaints appear to be less frequently admitted to the hospital than are insured patients, although health status does not appear to be affected. Whether these results reflect underutilization among uninsured patients or overutilization among insured patients remains to be determined.     

Survival after cardiac arrest outside hospital over a 12-year period in Gothenburg

BACKGROUND: A two-tiered ambulance system with a mobile coronary care unit and standard ambulance has operated in Gothenburg (population 434,000) since 1980. Mass education in cardiopulmonary resuscitation (CPR) commenced in 1985 and in 1988 semiautomatic defibrillators were introduced. Aim: To describe early and late survival after cardiac arrest outside hospital over a 12-year period. Target population: All patients with prehospital cardiac arrest in Gothenburg reached by mobile coronary care unit or standard ambulance between 1980 and 1992. RESULTS: The number of patients with cardiac arrest remained fairly steady over time. Among patients with witnessed ventricular fibrillation, the time to defibrillation decreased over time. The proportion of patients in whom bystander initiated CPR was increased only moderately over time. The proportion of patients given medication such as lignocaine and adrenaline successively increased. The number of patients with cardiac arrest who were discharged from hospital per year remained steady between 1981 and 1990 (20 per year), but increased during 1991 and 1992 to 41 and 31 respectively. CONCLUSIONS: Improvements in the emergency medical service in Gothenburg over a 12-year period have lead to: (1) a shortened delay time between cardiac arrest and first defibrillation and (2) an improved survival of patients with cardiac arrest outside hospital probably explained by this shortened delay time.     

Call to needle times after acute myocardial infarction in urban and rural areas in northeast Scotland: prospective observational study

OBJECTIVE: To determine call to needle times and consider how best to provide timely thrombolytic treatment for patients with acute myocardial infarction. DESIGN: Prospective observational study. SETTING: City, suburban, and country practices referring patients to a single district general hospital in northeast Scotland. SUBJECTS: 1046 patients with suspected acute myocardial infarction given thrombolytic treatment. MAIN OUTCOME MEASURES: Time from patients' calls for medical help until receipt of opiate or thrombolytic treatment, measured against a call to needle time of 90 minutes or less, as proposed by the British Heart Foundation. RESULTS: General practitioners were the first medical contact in 97% (528/544) of calls by country patients and 68% (340/502) of city and suburban patients. When opiate was given by general practitioners, median call to opiate time was about 30 minutes (95% within 90 minutes) in city, suburbs, and country; call to opiate delay was about 60 minutes in city and suburban patients calling "999" for an ambulance. One third of country patients received thrombolytic treatment from their general practitioners with a median call to thrombolysis time of 45 minutes (93% within 90 minutes); this compares with 150 minutes (5% within 90 minutes) when this treatment was deferred until after hospital admission. In the city and suburbs, no thrombolytic treatment was given outside hospital, and only a minority of patients received it within 90 minutes of calling; median call to thrombolysis time was 95 (46% within 90 minutes) minutes. CONCLUSIONS: The first medical contact after acute myocardial infarction is most commonly with a general practitioner. This contact provides the optimum opportunity to give thrombolytic treatment within the British Heart Foundation's guideline.