Robert Partridge

Air Bag Safety

STUDY OBJECTIVE To describe injuries associated with deployment of air bag passive-restraint systems in use in the United States. DESIGN Retrospective review of data collected by the National Highway Traffic Safety Administration (NHTSA) from 1980 to 1994. PARTICIPANTS Occupants of air bag-equipped vehicles who were involved in crashes on US roads. RESULTS Of 618 reported occupant injuries related to air bag deployment, an overwhelming majority were classified as minor (96.1%). Most occupants sustained abrasions, contusions, and lacerations. The face (42.0%), wrist (16.8%), forearm (16.3%) and chest (9.6%) were the most frequently injured body areas. CONCLUSION Most injuries related to air bag deployment are minor and must be viewed in the context of the potentially life-threatening injuries they prevent.

Non-Invasive Pulse CO-oximetry Screening in the Emergency Department Identifies Occult Carbon Monoxide Toxicity

As carbon monoxide (CO) toxicity may present with non-specific signs and symptoms and without history of exposure, screening for CO toxicity may identify occult cases. The objective of this study was to determine whether non-invasive screening for CO exposure could be performed in all patients presenting to a high-volume urban emergency department (ED) and would identify patients with unsuspected CO toxicity. A study of adult patients, who presented to the ED for any complaint, prospectively screened for carboxyhemoglobin concentration by a pulse CO-oximeter (SpCO). ED triage staff recorded SpCO on the patients chart at triage. Data, including SpCO and vital signs, were recorded in a database by two trained research assistants. When available, carboxyhemoglobin concentration obtained by venous blood was also included in the data set. There were 14,438 patients who presented to the ED and were entered in the study. Data from 10,856 (75%) patients receiving screening for SpCO were analyzed. Patients were 44 +/- 19 years old and 51% female; 32% of the patients smoked. The mean SpCO was 5.17% +/- 3.78% among smokers and 2.90% +/- 2.76% among non-smokers. During the study period, 11 patients with presenting signs and symptoms not consistent with CO toxicity were identified through SpCO screening. Screening for CO toxicity using a non-invasive pulse CO-oximeter can be conducted even in a busy tertiary center ED and identify patients with occult CO toxicity.

Do Emergency Physicians Use Serum d-Dimer Effectively to Determine the Need for CT When Evaluating Patients for Pulmonary Embolism? Review of 5,344 Consecutive Patients

OBJECTIVE The purpose of our study was to investigate whether D-dimer screening is being used effectively to determine the need for MDCT in diagnosing acute pulmonary embolism (PE) in emergency department patients. MATERIALS AND METHODS We performed a retrospective review of all patients who underwent D-dimer testing or MDCT in the emergency department from January 1, 2003, through October 31, 2005. A D-dimer value of > 0.43 microg/mL was considered positive. Diagnosis of PE was made on the basis of the MDCT. Clinical algorithms for diagnosing PE mandate that patients with a low clinical suspicion for PE undergo D-dimer testing, then MDCT if positive. For patients with a high clinical suspicion for PE, MDCT should be performed without D-dimer testing. RESULTS Of 3,716 D-dimer tests, 1,431 (39%) were positive and 2,285 (61%) were negative. MDCT was performed in 166 (7%) patients with negative D-dimer results and in 826 (58%) patients with positive D-dimer results. The prevalence of PE in patients with a high clinical suspicion and no D-dimer testing was 9% (139/1,628), which was higher than the rate of PE in the positive D-dimer group at 2% (19/826) (p < 0.0001). There was no significant difference in the prevalence of PE in the positive and negative D-dimer groups (2% vs 0.6%, respectively) (p = 0.23). The sensitivity and negative predictive value of D-dimer for PE were 95% (95% CI, 73.1-99.7%) and 99% (95% CI, 96.2-99.9%), respectively. CONCLUSION D-dimer screening is not used according to established diagnostic algorithms to determine the need for MDCT in diagnosing acute pulmonary embolism in our emergency department.

Smoking cessation among patients in an emergency chest pain observation unit: Outcomes of the Chest Pain Smoking Study (CPSS)

This study examines the efficacy of a smoking cessation intervention on abstinence rates and motivation to quit smoking. Participants were adult smokers (N = 543) who presented to the emergency department with chest pain and who were admitted to an observation unit for 24-hour observation to rule out myocardial infarction. Participants were randomly assigned to either usual care or a tailored intervention employing motivational interviewing and telephone follow-up. All individuals choosing to quit were offered nicotine patch therapy. Follow-up assessments were conducted at 1, 3 and 6 months. Abstinence (7-day point prevalence) rates were significantly greater among participants receiving the tailored intervention compared with those given usual care (OR = 1.62, 95% CI [1.05-2.50]). The largest difference occurred at 1 month: 16.8% of usual care and 27.3% of the tailored intervention group were abstinent, with differences decreasing over time. One-third of participants who were quit at month 6 were late quitters whose initial abstinence began after the 1-month follow up. In addition to treatment assignment, psychosocial variables including motivation to quit, confidence, reduced temptation to smoke in response to negative affect, and the perception that their chest pain was related to their smoking, were significant predictors of cessation. Tailored interventions are effective in promoting initial quit attempts for emergency chest pain patients admitted to an observation unit. Additional intervention may be needed to assist late quitters and to prevent relapse.

Sports-Related Pneumothorax

Pneumothorax and pneumomediastinum are rare complications of athletic activity. Spontaneous pneumothorax has been reported in association with several sports, but reports of pneumothorax associated with blunt trauma sustained during sporting activity are rare. We present a case series of patients in whom pneumothorax or pneumomediastinum developed as a result of blunt trauma sustained during participation in a contact sport.

Finding needles in a haystack: a case series of carbon monoxide poisoning detected using new technology in the emergency department.

Introduction. The diagnosis of carbon monoxide poisoning can be difficult because the symptoms are nonspecific and may mimic other illnesses. If carbon monoxide poisoning is suspected, the standard test at this time is venous or arterial carboxyhemoglobin levels. A new device, the Rad-57 pulse CO-oximeter (Masimo Inc.), can measure carboxyhemoglobin levels non-invasively at emergency department triage. Methods. The pulse CO-oximeter was utilized in our emergency department triage to measure carboxyhemoglobin levels on all patients. A retrospective chart review was then conducted to identify all patients with elevated levels. Case Series. Out of an estimated 74,880 patients who had their SpCO measured and documented at triage, seven patients who presented with vague complaints were diagnosed with occult carbon monoxide poisoning. Their diagnosis was facilitated by the non-invasive pulse CO-oximeter, which measured their carboxyhemoglobin levels when the standard vital signs were also documented at triage. Conclusions. The non-invasive pulse CO-oximeter could be a major triage tool for identifying unsuspected carbon monoxide poisoning among patients with nonspecific symptoms.

Emergency Medicine in West Kazakhstan, CIS

Now a member of the Commonwealth of Independent States, Kazakhstan is the second largest of the republics that made up the former Soviet Union. This report describes the structure of the health care system in Kazakhstan, with particular emphasis on emergency medicine. It examines medical education, the organization of health care services, emergency medical services, emergency department structure, and the challenges facing emergency medicine.

Use of Thrombolytic Therapy in a Heart Transplant Recipient With Acute Myocardial Infarction

We report the case of a 54-year-old long-term heart transplantation survivor who presented to the emergency department with acute myocardial infarction and was treated successfully with thrombolytic therapy. The case is discussed, and pertinent literature is reviewed.

Medical support for emergency relief workers after typhoon Sudal in Yap, Micronesia.

INTRODUCTION On 09 April 2004, Typhoon Sudal struck the Island of Yap in the Federated States of Micronesia (FSM). Over 90% of homes, public utilities, and public property were damaged or destroyed. Nearly 10% of the population was displaced to shelters, and the majority of the population was without drinking water or power. United States disaster workers were deployed to Yap for three months to assist in the recovery and relief efforts. OBJECTIVE The objective of this study was to evaluate the acute healthcare needs of the US disaster relief population serving in a remote setting with limited medical resources. METHODS A retrospective chart review of all disaster relief workers presenting to an emergency clinic in Yap during the disaster relief effort from April 2004-July 2004 was performed. Investigators extracted demographic data, chief complaints, medical histories, medical management, disposition, and outcome data from the clinic charts. RESULTS Together, the 60 disaster workers present on Yap during the relief effort made 163 patient contacts in the disaster emergency clinic. A total of 92% of patient contacts were for minor medical complaints or minor trauma, 13% were for upper-respiratory infections, 9% were for gastrointestinal illness, and 9% were for dermatological problems. Eight percent of visits were for serious medical problems or trauma. Life-threatening illnesses or injuries did not occur. CONCLUSIONS Disaster relief workers on Yap frequently utilized the disaster relief clinic. In general, disaster workers remained healthy during the relief effort in Yap, and most injuries and illnesses were minor. On-site medical providers resulted in rapid care and stabilization, and after treatment, disaster workers were able to return to duty.

Training the trainers in emergency medicine: an advanced trauma training course in Rwanda’s medical simulation center

Medical simulation is an integral tool for training medical students and physicians in all specialties, including emergency medicine. We describe a model program for advanced trauma training utilizing the medical simulation and skills center in Rwanda, one of the first in Africa for training health care professionals.