To determine the frequency with which physician, on-line medical direction (OLMD) [direct medical control] of prehospital care results in orders, to describe the nature of these orders, and to measure OLMD time intervals.

Blinded, prospective study.

A university hospital base-station resource center.

Ten emergency physicians, 50 advanced life support providers.

Prehospital treatment was directed by both standing orders and OLMD physician orders. Independent observers recorded event times and the characteristics of OLMD.

Physician orders were given in 47 (19%) of the 245 study cases, and covered a variety of interventions, including many already authorized by standing orders. Mean OLMD radio time was four minutes (245 ± 216 seconds [sec]), and time from beginning of OLMD to hospital arrival averaged 12 minutes (718 ± 439 sec). Mean transport time in this system was 13 minutes.

Despite detailed standing orders, OLMD results in orders for clinical interventions in 19% of cases. On-line medical direction requires about four minutes of physician time per call. This constituted about one-third of the potential field treatment time interval in this system. Thus, OLMD appears to play an important role in providing quality prehospital care.

Prehospital emergency medical services (EMS) personnel, as initial responders to calls for assistance, are in an ideal position to identify abused or neglected elderly. A survey of prehospital personnel in Michigan was conducted to determine the scope of this problem, levels of awareness, and willingness to report cases of elder abuse.

The study population was a random sample of 500 prehospital personnel throughout one state. A blinded, self-administered survey was completed by emergency medical technicians (EMTs) and paramedics outlining their practice characteristics, prevalence of abuse in their community, and training available specific to elder abuse. Attitudes concerning the understanding and reporting of geriatric abuse were measured using a Likert-type scale.

A total of 156 surveys (31%) was completed; 68% of the respondents were paramedics. Respondents had an average of 8.7 years (range: 9 months-30 years) of prehospital emergency-care experience, and evaluated an average of 11 patients (range: 1–59) older than 65 years of age each week. Seventy-eight percent had seen a suspected case of elder abuse or negligence during their careers; 68% had seen a case during the past 12 months (mean: 2.3 cases/yr; range: 0–24 cases/yr). However, surveyed personnel reported only 27% of suspected cases to authorities last year (mean: 0.62 cases/yr). Reasons for not reporting included 1) unsure which authorities take reports; 2) unclear definitions; 3) unaware of mandatory reporting laws; and 4) lack of anonymity. Ninety-five percent of respondents stated that training related to elder abuse was not available through their EMS agency.

Paramedics and EMTs lack complete understanding of their role in the identification and reporting of elder abuse. This information should be emphasized during EMS training and reinforced through continuing education.

In large disasters, such as earthquakes and hurricanes, rapid, adequate and documented medical care and distribution of patients are essential.

After a major (magnitude 6.7 Richter scale) earthquake occurred in Southern California, nine disaster medical assistance teams and two Veterans Administration (VA) buses with VA personnel responded to staff four medical stations, 19 disaster-assistance centers, and two mobile vans. All were under the supervision of the medical support unit (MSU) and its supervising officer. This article describes the patient-data collection system used. All facilities used the same patient encounter forms, log sheets, and medical treatment forms. Copies of these records accompanied the patients during every transfer. Centers for Disease Control and Prevention data classifications were used routinely. The MSU collected these forms twice each day so that all facilities had access to updated patient flow information.

Through the use of these methods, more than 11,000 victims were treated, transferred, and their cases tracked during a 12-day period.

Use of this system by all federal responders to a major disaster area led to organized care for a large number of victims. Factors enhancing this care were the simplicity of the forms, the use of the forms by all federal responders, a central data collection point, and accessibility of the data at a known site available to all agencies every 12 hours.

To evaluate the effectiveness of the Actronics Interactive Learning System to teach the psychomotor skills of advanced airway management compared to the traditional method of lecture/demonstration.

The study was a nonrandomized, nonequivalent comparison group design of a convenience sample of 86 American Heart Association (AHA), advanced cardiac life support (ACLS) students, who obtained instruction in airway management by the interactive videodisc (IVD) learning system (n = 41), or by the traditional method of demonstration/return demonstration (n = 45). The evaluation criteria for the students were based on the number of attempts required to perform successfully endotracheal (ET) intubation and esophageal obturator airway (EOA) insertion.

No statistically significant differences in the performance of ET insertion between the IVD and the traditional method of instruction could be demonstrated. However, initial certifiers for ACLS learning EOA insertion by the IVD method had a treatment effect (p = 0.004) compared to ACLS students learning by the traditional method. This treatment effect was not noted with ET intubation and EOA insertion for students seeking recertification. In a post-test satisfaction questionnaire, 34 IVD students reported satisfaction with learning airway management using this instructional method, but also expressed a preference to have an ACLS instructor available.

This study highlights the role of IVD in teaching the complex skills of advanced airway management.

To test the hypothesis that a prehospital time threshold (PhTT) exists that when exceeded, significantly increases the mortality of trauma patients transported directly from the scene of injury to a trauma center rather than to the closest hospital.

Review of data contained within the Illinois Trauma Registry encompassing the period from fall 1989 through spring 1991.

A total of 5,215 injured persons with an Injury Severity Score (ISS) >10, cared for in an Illinois level-I or -II trauma center outside of the city of Chicago.

Injury severity expressed as ISS, scene time (ST), transport time (TrT), total emergency medical services time (TEMST), and outcome were determined for each patient. Patients were stratified into groups on the basis of ISS.

Patient outcomes were significantly different statistically between ISS groups (p <0.001, X2). Mean ST and TEMST, but not TrT, were significantly different statistically between ISS groups (p <0.001, analysis of variance). Lower ISS was associated with longer times. Mean ST, TrT, and TEMST were significantly different statistically between survivors and nonsurvivors (p <0.001, two-sample t-tests). Survival was associated with longer times. Each of the mean times remained significantly different between survivors and nonsurvivors after controlling for severity of injury (p <0.001, two-way analysis of variance).

No PhTT beyond which time patient transport to the closest hospital would have decreased mortality was identifiable, because no prehospital time <90 minutes exerted a significant adverse effect upon survival.

Mask ventilation is a procedure routinely used in emergency medicine. Potential hazards are inadequate alveolar ventilation and inflation of the stomach with air, leading to subsequent regurgitation and aspiration. The aim of this study was to measure lung function and gastric inflation pressures during mask ventilation.

For this purpose, 31 patients scheduled for routine urological procedures were studied during induction of anesthesia. Lung function was assessed by recording respiratory flow and pressure directly at the face mask. Gastric inflation was observed with a microphone taped to the epigastric area.

Gastric inflation occurred in 22 of the 31 patients. Mean gastric inflation pressure was 27.5 ±6.55 cm H2O, mean compliance was 67 ±24.1 ml/cm H2O, mean resistance was 17.4 ±6.41 cm H2O/L/sec, and the mean respiratory time constant was 1.1 ±0.26 seconds.

These data suggest that inspiratory pressure be limited to 20 cm H2O, and that an inspiratory time of at least four times the respiratory time constant be allowed. Monitoring airway pressure and gastric inflation is a simple technique that may improve the safe-ty of patients during mask ventilation.

Sixteen percent of all motor-vehicle fatalities are pedestrian, and accidents involving pedestrians are associated with the highest morbidity and mortality rates. Classic pedestrian injury patterns have been described. However, it has been suggested that the pattern may differ if the pedestrian is intoxicated. The role of pedestrian intoxication on motor-vehicle accident injury patterns has not been well-delineated.

Intoxicated pedestrian traffic victims have an injury pattern that is more serious and more rapidly fatal than is the pattern for nondrinking victims.

Autopsies of 223 consecutive pedestrian victims were reviewed and grouped according to the presence of alcohol in the blood: Group I, Negative (n = 165); Group II, Positive (n = 58). Gender, age, anatomic injuries, survival time, time of day, and year also were examined.

Results indicated that there were more males in Group II (79%) than in Group I (64%); younger victims, younger than 40 years old, in Group II (70%) than in Group I (34%); fewer victims older than 60 years old in Group II (8%) than in Group I (38%). Group II sustained more frequent and more severe injuries—two times the frequency of the cervical spine, liver, upper and lower extremity, pelvic and rib fractures and thoracolumbar spine injuries; three times more aortic injuries; five times more heart injuries. Death occurred within 24 hours in 95% of those in Group II and in 67% of those in Group I. Accidents occurred from 1500h to 2300h in 67% of Group II and in 53% of Group I victims.

Intoxicated pedestrian accident victims are predominantly young men, struck between 1500h and 0700h; they have an injury pattern that is two to five times more serious than is the pattern for the sober victims.

To explore the determinants influencing oral/nasal endotracheal intubation (OETI/NETI) and determine which cognitive, therapeutic, and technical interventions may assist prehospital airway management.

Prospective review of run reports and structured interviews of paramedics involved in OETI/NETI attempts were conducted in a high-volume, inner-city, advanced life support (ALS) system during an eight-month period (July 1991 to February 1992). Data were abstracted from run reports, and paramedics were asked in structured interviews to describe difficulties in OETI/NETI attempts.

Of 236 patients studied, 88% (208) were intubated successfully. Success/failure rate was not related statistically to patients' ages (p = 0. 78), medical or trauma complaint (89% vs 85%, p = 0.35), oral versus nasal route (88% vs 85%, p = 0.38), care time (scene + transport times: success, 18 minutes; failure, 20 minutes, p = 0.30), paramedic seniority (p = 0.13), or number of attempts per paramedic (p >0.05). Increased level of consciousness (LOC) was associated with decreased success rate (p = 0.04). Paramedics reported difficulties in endotracheal intubation (ETI) attempts in 110 (46.6%) of patients. Factors reported to increase ETI difficulty were: 1) technical problems (35.6%); 2) mechanical problems (15.6%); and 3) combative patients (12.7%).

Oral endotracheal intubation and NETI success rates identified in this study are similar to those described in the literature, although innovative strategies could be used to facilitate prehospital airway management. Many of the factors found to increase ETI difficulty could be ameliorated by the administration of paralytic agents, that is, for combative patients. Focused training in cadaver and animal labs coupled with recurrence training in the operating suites should be used on a regular basis to decrease difficulties in visualization. Interventions directed at alleviating mechanical difficulties that should be explored include new-to-the-field techniques, such as retrograde intubation, fiber-optic technology, and surgical tracheal access.