On 17 October 1989, the Loma Prieta Earthquake shook the San Francisco Bay area, home to more than 6 million people. This study examined the effectiveness and function of emergency medical services (EMS) communications after this event.

The six Bay area counties most affected by the Loma Prieta Earthquake were surveyed using a 156-part questionnaire. This study examined the functioning of the primary 9-1-1 county dispatch centers. Paramedics involved in a set of defined activities during the period after the earthquake also were surveyed. Emergency medical services directors also were questioned by telephone using an interview tool developed for this purpose. All areas concerning disaster response were not queried. Ten specific areas were considered, including: 1) preparation for disaster; 2) the impact of the earthquake; 3) reconnaissance; 4) call volume; and 5) others.

Coordination among the various agencies responsible for disaster response and mitigation needs more study. Uniform response plans for medical mutual aid need development. Government support similar to police and fire department arrangements for mutual aid are not in place. Additional planning and training for disasters at all levels need reassessment. The communication-center personnel indicated that they did not call for more resources, but instead accepted volunteers at dispatch centers and extra assistance. Once engaged, however, most communications centers (CCs) had great difficulty tracking and controlling all the units under their jurisdiction. In some large urban counties, some ambulances were idled awaiting calls but lost their communications centers, while other ambulance personnel were trying to handle multiple patients and requests for services.

Significant help from a state or federal agency likely will be unavailable for a substantial period after a catastrophic regional event. Important coordination among EMS agencies for disaster response is poor or absent. Although fatalities and casualties were limited compared to what could have occurred, great confusion reigned for varying periods of time after the earthquake. Communications among local agencies, counties, and the state were problematic. Information flow to hospitals was cited frequently as a problem, making it difficult for hospitals to prepare adequately. Medical mutual-aid help was disorganized and inadequately controlled. The training of personnel and the method of recall for disaster response need to be examined.

Previous evaluations of prehospital devices intended for spinal immobilization have focused on the device's ability to restrict motion only. This study defines six relevant criteria for evaluation of cervical immobilization device (CID) performance.

To suggest relevant criteria for evaluation and use available technology to improve measurements for performance testing of prehospital-care devices.

Six parameters (motion restriction, access, ease of application, environmental performance, radiolucency, and storage size) were used to evaluate three types of CIDs: Device A—a single-use corrugated board; Device B—a reusable foam-block CID; and Device C—hospital towels and adhesive tape. To test motion restriction, the most frequently compared parameters for immobilization devices, 20 volunteers were asked to move their heads and necks through a series of motions (flexion, extension, lateral bending and rotation). Their movements were videotaped, still images of each movement were generated, and the degrees of deflection recorded from these still images. To ensure a consistent level of force, electromyography (EMG) of the sternodydomastoid and extensor muscles was employed.

Data were produced for each parameter and presented for comparison. The use of video to determine deflection proved to be a useful and highly accurate (±1°) method for measurement. The use of EMG technology enabled force to be controlled indirectly when the subjects used moderate levels of exertion. Overall, Devices A and C restricted motion better than Device B. Although Device C required the shortest time for application, it took the longest to prepare for application. The total time required for preparation and application of A and B essentially were equivalent, with A requiring no preparation time but taking the longest for application, and B having an intermediate interval for application. Device A allowed for the best examination of the head and neck. No differences were detected in performance in extreme environmental conditions or in radiolucency for cervical spine X-ray examinations. Device A consumed the smallest storage volume, B the greatest storage volume, and C an intermediate volume substantially greater than that required for A.

Device evaluation should include examination of all relevant performance parameters using the most accurate and meaningful methods possible.

Awareness of the risk of spinal-cord damage in moving an unconscious person with a suspected neck injury into the “lateral recovery position,” coupled with the even greater risk of inadequate airway management if the person is not moved, has resulted in a suggested modification to the lateral recovery position for use in this circumstance.

It is proposed that the modification to the lateral recovery position reduces movement of the neck. In this modification, one of the patient's arms is raised above the head (in full abduction) to support the head and neck. The position is called the “HAINES modified recovery position.” HAINES is an acronym for High Arm IN Endangered Spine.

Neck movements in two healthy volunteers were measured by the use of video-image analysis and radiographic studies when the volunteers were rolled from the supine position to both the lateral recovery position and the HAINES modified recovery position.

For both subjects, the total degree of lateral flexion of the cervical spine in the HAINES modified recovery position was less than half of that measured during use of the lateral recovery position (while an open airway was maintained in each).

An unconscious person with a suspected neck injury should be positioned in the HAINES modified recovery position. There is less neck movement (and less degree of lateral angulation) than when the lateral recovery position is used, and, therefore, HAINES use carries less risk of spinal-cord damage.

A multitude of life-threatening and nonlife-threatening processes cause chest pain and shortness of breath. Prehospital therapy for these patients may be lifesaving and includes pharmacologic interventions, as well as invasive procedures. Appropriate therapy depends on the diagnostic skills of the paramedic.

This study was undertaken to determine the accuracy of the paramedic diagnosis in patients transported with a chief complaint of pain or shortness of breath.

Multihospital, one large municipal hospital, one community hospital.

Prospective, cross-sectional study. Paramedics evaluated the patient and then completed a standard form indicating the diagnosis. The paramedic's and final emergency physician's diagnoses were compared to assess the accuracy of the paramedic diagnosis.

All patients who complained of chest pain or shortness of breath, transported to the study centers by the city of Denver paramedia, were eligible for the study. Ninety-nine of the 102 patients enrolled had complete records for analysis and were entered into the study.

Diagnostic concordance data were analyzed by organ system (e.g., cardiac, pulmonary, etc.) and for specific diagnoses using the kappa statistic and McNemar's chi-square analysis for discordant pairs. Using the kappa statistic, there was statistically significant concordance between the paramedic and emergency-physician diagnosis for cardiac (p = 0.0001; kappa value = 0.54) and pulmonary organ systems (p = 0.0001; kappa value = 0.61). Overall, for organ system diagnosis, the paramedics had an 82% accuracy (p = 0.05) rating. For specific cardiac and pulmonary diagnosis, paramedics had good concordance with emergency physicians.

Overall, paramedia have excellent diagnosis by organ system. They retained good agreement on specific cardiac diagnoses and pulmonary diagnosis.

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 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.

To analyze the availability and level of medical services for fans at major league baseball games in the United States.

A 10-item questionnaire was sent to the operations managers of each of 28 major league baseball stadiums. The survey was distributed in cooperation with a major league baseball club. Telephone follow-up was used to complete missing responses. The survey addressed five areas of fan medical services: 1) health-care provider availability and compensation; 2) advanced cardiac life support (ACLS) capabilities, including equipment; 3) presence of on-site ambulance(s); 4) fan fatalities; and 5) alcohol consumption limitations.

Survey response was 100%. Healthcare providers are on-site at all stadiums: nurses (86%), physicians (75%), emergency medical technicians (EMTs, [68%]), and paramedics (50%). Ninety-six percent use a combination of health-care providers. The most common medical teams are nurse + EMT + physician (25 %) and nurse + EMT + paramedic + physician (18%). All health-care providers receive some form of compensation. All stadiums have at least one ACLS-certified provider; 96% have ACLS equipment. Ambulances are on-site 75% of the time. Sixty-eight percent of the clubs reported at least one fan fatality through the 1992 and 1993 seasons (mean 1.1, range 0–4). All clubs limit alcohol consumption; 96% use multiple approaches. The various approaches include: 1) specific inning discontinuation (86%); 2) maximum purchase (68%); 3) restricted sale locations (64%); and 4) crowd conduct (57%). Advertisement for responsible alcohol consumption is displayed at 75% of the stadiums; designateddriver programs exist at 46%.

All major league baseball clubs provide medical services for fans. Furthermore, almost all stadiums have ACLS capabilities. Responsible alcohol consumption also is a recognized priority for fan safety.

Although major sequelae of carbon-monoxide (CO) poisoning and its treatment with hyperbaric oxygen (HBO) are well-documented, a syndrome of low-level CO poisoning has received relatively little attention. Subtle symptoms of poor concentration, language difficulty, problems with calculations, and memory loss were noted after an acute exposure of 131 dormitory residents to low levels of CO. The CO Neuropsychological Screening Battery (CONSB), a series of tests reported by others as useful to identify victims of CO poisoning, was performed on a subset of 46 victims. It was hypothesized that their test scores would improve after treatment with HBO.

Testing was performed both before and after HBO on 35 CO-exposed victims. A control group of 20 students residing on the same college campus, but not involved with the CO incident, also were tested on two separate occasions to assess the ability of the test to identify selectively victims of low-level CO poisoning, as well as to evaluate its validity when administered serially.

Both CO-exposed and control subjects demonstrated significant performance improvement when completing the testing for the second time. In addition, the baseline test scores were not significantly different for either the CO-exposed or the control groups. Nonetheless, all CO-exposed victims reported immediate subjective improvement of their symptoms after HBO therapy.

These observations and a review of the literature suggest that there might exist a syndrome of subtle neurological disturbances in victims of low-level CO poisoning. Whether this is permanent or might regress spontaneously over time is unknown. As a diagnostic adjunct, the CONSB does not appear to be as useful in low-level CO poisoning.