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Biomedical subjects

R F Maio

Publications and source records attributed to R F Maio.

35 records · Page 2Linked to original sources
PubMed1993

Trauma scores, accident deformity codes, and car restraints in children.

The importance and effectiveness of the appropriate use of automobile restraints by young children has been emphasized in several studies. Once the child has entered the emergency care system, however, restraint use may not be the best predictor of injury severity. This study was undertaken to investigate the relationship of restraint status to morbidity and mortality in children examined in a hospital emergency facility following involvement in a motor vehicle crash (MVC). The emergency room charts of 101 children under 18 years of age, who were victims of MVCs, were reviewed and the following trauma scores were calculated: Glascow Coma Scale, Pediatric Trauma Score, Revised Trauma Score, Injury Severity Score, and Maximum Abbreviated Injury Score. In addition, the Traffic Accident Damage (TAD) score, an estimate of crash severity determined by the police at the accident scene, was recorded. The patients were age stratified as follows: 0 to 4 years (n = 24), 5 to 11 years (n = 29), and 12 to 17 years (n = 48). Fifty patients were appropriately restrained at the time of the crash. There was a significant correlation between mean trauma scores and mean TAD codes (P < .05). There were no significant differences in mean trauma scores between improperly restrained (n = 11) and unrestrained (n = 40) children (P > .05) across all age groups, and these children were grouped together as "unrestrained" in further analyses.(ABSTRACT TRUNCATED AT 250 WORDS)

Accidents, Traffic↗
PubMed1993

Inter-rater agreement of paramedic rhythm labeling.

STUDY HYPOTHESIS: Substantial inter-rater agreement is present in the labeling by paramedics of ventricular fibrillation and asystolic rhythms. DESIGN: Prospective, cross-sectional study. TYPE OF PARTICIPANTS: One hundred five practicing paramedics from nonvolunteer agencies who are advanced cardiac life support certified. METHODS: Five static cardiac arrest rhythm strips, classified by Cummins' average peak amplitude method, were arranged into five different orders of presentation and placed into five booklets. The paramedics were instructed to label each rhythm ventricular fibrillation or asystole based on rhythm recognition, not on treatment plan. RESULTS: The overall kappa value for labeling the five rhythms was .63, indicating a moderate degree of inter-rater agreement. However, as the rhythm's amplitude decreased, the amount of inter-rater agreement also decreased. When the amplitude was approximately 1 mm, agreement was no different than chance; the proportion of paramedics labeling the rhythm ventricular fibrillation was .46 (95% confidence interval, .36, .56). Only a flat line (0 mm) demonstrated perfect inter-rater agreement, with no paramedic labeling the rhythm ventricular fibrillation. CONCLUSION: Inter-rater agreement of ventricular fibrillation rhythm labeling by paramedics in this emergency medical services system was amplitude dependent. An analysis of ventricular fibrillation rhythm data that does not address the degree of inter-rater agreement of rhythm labeling cannot ensure uniform reporting of out-of-hospital cardiac arrest data.

Cross-Sectional Studies↗
PubMed1992

Rural motor vehicle crash mortality: the role of crash severity and medical resources.

We did a retrospective case control study to examine the relationship between the risk of dying for Michigan motor vehicle crash (MVC) drivers and the type of county (rural/nonrural) of crash occurrence, while adjusting for crash characteristics, age, sex, and the medical resources in the county of crash occurrence. The 1987 Michigan Accident Census was used to obtain data regarding all MVC driver nonsurvivors (733) and a random sample of all surviving drivers (2,483). County of crash occurrence was defined as rural or nonrural. The crash characteristics analyzed were vehicle deformity, seat belt use, and drivability of the vehicle from the scene. Age and sex of the driver were also analyzed. Medical resource characteristics for the county of crash occurrence were measured as the number of resources per square mile for each of the following: ambulances, emergency medical technicians (EMT), acute care hospital beds, and operating rooms, surgeons and emergency physicians. Also considered were the number and level of emergency rooms in the county of crash occurrence along with the maximum level of prehospital care available (basic life support versus advanced life support) in a county. Before adjusting, the relative risk (RR) for rural MVC drivers dying, compared to their nonrural counterparts, was 1.96. Adjustment for crash characteristics, age, and sex (using logistic regression) decreased the RR to 1.51. An attempt to add medical resource variables to the model resulted in high correlation with the rural/nonrural variable, as well as with each other. This multi-collinearity prevented us from providing a simple explanation of the role of medical resource variables as predictors of survival.(ABSTRACT TRUNCATED AT 250 WORDS)

Accidents, Traffic↗
PubMed1991

Quality assurance in emergency medical service systems in Michigan: report of a survey.

To determine the characteristics and effects of quality assurance programs in emergency medical service (EMS) systems in Michigan, medical directors of all EMS medical control authorities in Michigan were mailed a survey consisting of 14 closed-ended and open-ended questions including 2 using a subjective continuum scale; the study included phone follow-up of nonrespondents. Twenty-nine (56%) of 52 authorities surveyed responded; 28 reported that they conducted quality assurance activities. Physicians were the most commonly reported reviewers and emergency medical technicians were the practitioners most frequently reviewed. Although 26 (92%) respondents reported that their quality assurance program made a difference in the quality of care delivered, lack of standards and resources were most frequently listed as program weaknesses. Survey findings prompted the EMS Division of the Department of Public Health, State of Michigan, to address quality assurance in statewide seminars and to develop guidelines for statewide implementation.

Emergency Medical Services↗
PubMed1984

Intralingual naloxone reversal of morphine-induced respiratory depression in dogs.

A descriptive study was done to determine whether naloxone is efficacious in reversing morphine-induced respiratory depression in dogs when administered intralingually into the ventral lateral surface of the tongue. Mean minute ventilation was depressed to half of resting baseline levels using fixed intravenous doses of morphine sulfate. Intralingually administered naloxone reversed this respiratory depression rapidly within one minute, and resulted in a greater than fourfold increase in mean minute ventilation above established baseline levels.

Animals↗
PubMedDate not supplied

EMS providers do not accurately note motor-vehicle crash patients with positive serum alcohol concentrations.

INTRODUCTION: Alcohol use is associated with many motor-vehicle crashes and may increase the severity of injury. Because alcohol use also may mask injury, prehospital emergency care providers (PHECPs) may make inaccurate assessments. To assess and triage crash victims accurately, PHECPs must identify recent alcohol use. STUDY OBJECTIVE: This study examines the accuracy of PHECPs in identifying motor-vehicle crash victims who had positive serum alcohol concentrations. DESIGN: Retrospective cohort study. POPULATION: Included in the study were motor-vehicle crash victims more than 17 years of age who were conveyed directly to a university medical center emergency department by ground ambulance (n = 372). TIME PERIOD: 15 July 1990 to 15 July 1991. METHODS: Data sources included ambulance report forms and hospital records. Variables that were abstracted included the Revised Trauma Score (RTS), the PHECPs' impression of alcohol use, and serum alcohol concentrations. Sensitivity, specificity, predictive-value positive, predictive-value negative, and 0.95 confidence intervals (0.95 CI) were calculated for the PHECPs' ability to identify patients with a serum alcohol concentration > 0. The relationship between the RTS and the impressions of alcohol use was analyzed with chi-square testing: a p-value of < 0.05 was considered statistically significant. CONCLUSION: This study suggests that PHECPs cannot accurately identify crash victims with positive serum alcohol concentrations. Selection bias and retrospective design are significant limitations of this study. Future studies should develop and evaluate methods to improve PHECPs' accuracy in assessing alcohol use in motor-vehicle crash victims.

Accidents, Traffic↗
PubMedDate not supplied

Derivation and validation of criteria for determining the appropriateness of nonemergency ambulance transports.

OBJECTIVE: Nonemergency ambulance transports (NETs) represent a substantial proportion of all ambulance transports. Recently, the medical necessity of a substantial number of NETs has been questioned. The purpose of the study was threefold: 1) to formulate criteria for NET using a multidisciplinary panel; 2) to develop a structured implicit review instrument (SIRI) for the evaluation of NET from the criteria formulated; and 3) to evaluate the reliability and validity of the SIRI. Previously, a validated instrument has not been available to assess NET appropriateness. METHODS: Using a modified Delphi process and scale development techniques, a panel of ten multidisciplinary health care professionals determined criteria for NET and developed a SIRI consisting of two dimensions: 1) ambulation status and 2) medical care requirements. A convenience sample of 50 cases (occurring January through May 1996) were retrospectively reviewed by individual panel members and two panels, and categorized as either: 1) definitely appropriate NET; 2) possibly appropriate NET; 3) patient did not require ambulance transport; 4) patient required emergency transport; and 5) indeterminate. Reliability of the SIRI was assessed using percent agreement among individual panels and weighted kappa for the two panels. Interitem consistency of the SIRI was measured by Cronbach's alpha. Criterion validity was assessed by comparing percent agreements between the SIRI and Medicare reimbursement guidelines. RESULTS: Percent agreement among individual panel members was 62%. Percent agreement among the two panels was 74%, with a kappa of 0.43. Cronbach's alpha for individual panel member item response ranged from 0.647 to 0.960. Percent agreement with Medicare reimbursement guidelines was 92%. CONCLUSION: Consensus criteria and an associated SIRI were developed for determining the appropriateness of NETs. Further research is needed to build on the validity and reliability of this instrument.

Aged↗
PubMedDate not supplied

The accuracy of medical records and police reports in determining motor vehicle crash characteristics.

OBJECTIVE: To determine the accuracy of police, emergency department, and ambulance records in describing motor vehicle crash (MVC) characteristics when compared with a crash investigation report (CIR). METHODS: This study was a retrospective record review. Sixty-three motor vehicle crash (MVC) patients transported to a university hospital emergency department via ambulance and also reported in a crash investigation record (CIR) during the period January 1993 to December 1995 comprised the study population. The crash characteristics analyzed were occupant position (OP), restraint use (RU), air bag deployment (AD), type of impact (TI), ejection (EJ), and external cause-of-injury code (EC). The accuracies of the police report (PR), the emergency department record (EDR), and the ambulance report (AR) for each patient were compared with the CIR by computing percent agreement, with 95% confidence intervals (95% CIs) for each variable and for each data source. RESULTS: Overall average agreement was 92.9% for PR, 89.7% for EDR, and 80.7% for AR. The overall average agreement for each variable was 98.9% for EJ, 92.1% for AD, 91.5% for OP, 90.5% for EC, 77.2% for RU, and 76.2% for TI. For all but one variable (RU), 95% CIs overlapped between data sources. CONCLUSIONS: The accuracy of data sources used to determine crash characteristics varies. Using a CIR as the standard, the PR was the most accurate. Inaccuracies occurred most frequently for RU and TI. Researchers and clinicians need to be aware of these inaccuracies.

Accidents, Traffic↗
PubMedDate not supplied

Evolving challenges in prehospital trauma services. Current issues and suggested evaluation tools.

For the past two decades, prehospital trauma care has been addressed almost generically in terms of the related approaches to epidemiology, research, and management. However, evolving directions in research have helped emergency medical services (EMS) practitioners to delineate more focused treatment strategies according to the mechanisms of injury, anatomic involvement, and the patient's clinical condition. Recent studies in the areas of trauma-associated circulatory arrest, severe blunt head injury, and post-traumatic hemorrhage following penetrating truncal injury suggest that current standard approaches to patient care should be reconsidered. In turn, this need for re-examination of trauma management strategies calls for the development of appropriate evaluation tools within EMS systems. Proper research design is dependent upon several key issues including: 1) the type of study (system study versus examination of a specific intervention); 2) the population under study; 3) physiological and anatomical scoring method; 4) prospective definitions of interventions and meaningful outcome variables (both morbidity and mortality); 5) relative outcome compared to known standards; and 6) prospective determination of statistical requirements.

Clinical Trials as Topic↗
PubMedDate not supplied

The wake-effect--emergency vehicle-related collisions.

INTRODUCTION: Emergency medical vehicle collisions (EMVCs) occurring during initial response and with patient transport have been a long-standing problem for emergency medical services (EMS) systems. Experience suggests "wake-effect" collisions occur as a result of an EMS vehicle's transit, but do not involve the emergency medical vehicle (EMV). Substantiating the existence and magnitude of wake-effect collisions may have major implications regarding the manner of EMV response. HYPOTHESIS: Paramedics will report that wake-effect collisions do occur and that they occur more frequently than do EMVCs. METHODS DESIGN: Survey analysis. PARTICIPANTS: Thirty paramedics employed by the Salt Lake City (Utah) Fire Department and 45 paramedics employed by Salt Lake County Fire Department. Geographic Area: Service area has population of 650,000 and is urban, suburban, and rural. MEASUREMENTS: The survey consisted of three open-ended questions concerning years on the job, EMVCs, and wake-effect collisions. ANALYSIS: The mean value for the number of EMVCs and wake-effect EMVCs, along with the 0.95 confidence intervals (0.95 CI) were determined. RESULTS: Seventy-three surveys were analyzed. Sixty EMVCs and 255 wake-effect collisions were reported. Overall, the mean value for the number EMVCs per respondent was 0.82 (0.60-1.05) and for wake-effect collisions 3.49 (2.42-4.55). The mean values for EMVC's for each service were 0.86 (0.50-1.38); 0.80 (0.50-11.0). For wake-effect collisions the mean values were 4.59 (2.83-6.35); and 2.76 (1.46-4.06) respectively. CONCLUSIONS: This study suggests that the wake-effect collision is real and may occur with greater frequency than do EMVCs. Significant limitations of this study are recall bias and misclassification bias. Future studies are needed to define more precisely wake-effect collision prevalence and the resulting "cost" in regards to injury and vehicle/property damage.

Accidents, Traffic↗