Objectives: Paramedic-initiated turndowns-to-BLS are a high-risk area for EMS. One non-clinical factor that might affect paramedics’ decision-making is a 24-hour work schedule. We attempted to determine the presence of circadian variation in the turndown rate from ALS to BLS when paramedics work 24-hour shifts.

Methods: Retrospective analysis of all 1994 ALS patient evaluations. Encounters were classified as: ALS transport; turndown-to-BLS; patient-initiated refusal of transport; other transport; field death. Analysis of variation in turndown rate by hour of ALS dispatch was performed using logistic regression to make paired comparisons for each hour.

Results: 17,877 patients were evaluated by ALS. Of these, 10,956 (61%) were ALS transports, 6,200 (35%) were not transported by ALS, and 721 (4%) were dead. Of the 6,200 alive non-ALS transports, 4,291 (69%) were turned down to BLS, 1,748 (28%) refused transport, and 161 (3%) were transported by others. One turndown-to-BLS was excluded due to missing dispatch time; for the remaining 4,290 the overall turndown rate was 25%. The turndown rates for 15 of 24 hours did not differ significantly (p >0.01) from any other hour. The rates at the following hours differed significantly: hour 3 < 13; hour 5 < 8,9,10,13,16,22; hour 9 > 20,22; hour 10 > 22; hour 13 > 20,22; hour 16 > 20,22.

Prehospital guidelines that define the clinical indications for spine trauma also serve as the criteria for selective spinal immobilization in the field. Therefore, these criteria are important for avoiding further spinal cord damage. Because some spine injuries may occur without neurological deficits or other clinical signs, the recommended field guidelines extend beyond the signs and symptoms and include mechanisms of injury or other injuries commonly associated with a high risk of spine injury.

A more accurate estimate of the number of ambulances needed at disasters prevents vehicles from being withdrawn unnecessarily from their “normal” duties, thereby curtailing needless expense and helping to ensure that disaster sites are not overcrowded with emergency workers impeding each other's effectiveness. This article discusses a formula for determining the number of ambulances needed at a disaster.

Purpose: To determine what types of EMS systems (public vs. private) are contributing to the peer reviewed field research in EMS and what type of research is being done by these agencies.

Methods: A Medline literature search was conducted of all peer reviewed journals using the search terms: EMS, emergency medical services, EMT, paramedic, and ambulance. Studies published between 1976 and 1995 meeting these criteria were reviewed and classified as field or non-field studies. Studies were classified as field studies if they evaluated clinical outcomes or overall EMS system structure and performance. The type of EMS system in which the study was conducted was classified as: public (PB), private (PR), or a mixture of public and private agencies (PP). If the type of system was not evident in the paper, the primary author or EMS agency was contacted by phone. The primary affiliation of the first author was classified as being with: an educational institution, hospital, government agency, or EMS agency. Each study was also classified as being primarily clinical or evaluating EMS system structure. Review articles, editorials, and meta-analyses were excluded as were studies in which critical data elements could not be verified. Fischer's exact test was used for statistical analysis.

Results: A total of 365 studies were evaluated with 66 non-field studies being excluded from analysis. 75 studies did not meet inclusionary criteria. This left 224 studies for analysis. PB systems accounted for 167 (74.5%) of field studies, with PP 44 (19.6%) and PR 13 (5.8%). Clinical studies were more commonly done by PB systems (72.5%) when compared to PR systems (38.5%), p = 0.02. System structure studies accounted for the majority of studies done by PR systems (61.5%). An affiliation with an educational institution such as a university occurred in 61.2% of the studies. The number of field studies done by PB systems has increased steadily over the last 10 years while field studies published by PR and PP systems has remained at a low level, with none published from 1992–1994.

Purpose: Criteria (T&R) have been proposed to identify hypoglycemic patients who may be treated in the field and released without transport to the hospital. We prospectively evaluated the validity of these criteria.

Methods: Patients presenting with hypoglycemia (blood glucose [BG] <80 mg/dL) to paramedics of 2 EMS systems were prospectively enrolled and the presence of T&R criteria determined. T&R criteria did not influence transport. Hospital records were reviewed to determine interventions and outcomes.

Results: A total of 151 patients were enrolled (58% male, age 56 years (range 12–94), BG 33 ±16 mg/dL) and 99 (66%) were transported to the hospital and used to test the T&R criteria. Fifty-six patients (57%) were discharged from the ED and 43 (43%) received additional medications, or were admitted. T&R criteria identified 28 (29%) patients as appropriate for treatment and release. Of these, 5/28 (18%) received additional dextrose 50% (D50) or admission; 3 received D50 (despite normal mental status and documented ED BG >100 mg/dL), and 2 were admitted (transient ischemic attack and 1 hospital day, hypoglycemia and gastroenteritis and 2 hospital days). Sensitivity, specificity, negative and positive predictive values for the T&R criteria were: 41%, 88%, 51%, and 82%, respectively, and 44%, 95%, 54%, and 93%, respectively, if the 3 cases receiving D50 despite BG>100 mg/dL are excluded.