Clinical Images in Emergency Medicine: Cushing's Disease.

Case Presentation: A 22-year-old female presented to the emergency department with a two-month history of worsening fatigue, unintentional weight gain, and progressive facial swelling. Physical examination findings included hirsutism, moon facies, and abdominal striae. Subsequent brain magnetic resonance imaging revealed the presence of a 2.4-centimeter pituitary macroadenoma, confirming the diagnosis of Cushing's disease. The patient was then admitted for neurosurgical tumor resection. Discussion: Cushing's disease is exceedingly rare and often presents with symptoms resembling more prevalent disorders, contributing to delays in diagnosis. Therefore, maintaining a high index of suspicion for this disease is crucial for emergency physicians.

A survey of handoff practices in emergency medicine.

This study aimed to assess practices in emergency department (ED) handoffs as perceived by emergency medicine (EM) residency program directors and other senior-level faculty and to determine if there are deficits in resident handoff training. This cross-sectional survey study was guided by the Kern model for medical curriculum development. A 12-member Council of Emergency Medicine Residency Directors (CORD) Transitions in Care task force of EM physicians performed these steps and constructed a survey. The survey was distributed to the CORD listserv. There were 147 responses to the anonymous survey, which were collected using an online tool. At least 41% of the 158 American College of Graduate Medical Education EM residency programs were represented. More than half (56.6%) of responding EM physicians reported that their ED did not use a standardized handoff. There also exists a dearth of formal handoff training and handoff proficiency assessments for EM residents.

An algorithm for transition of care in the emergency department.

OBJECTIVES: The objective of this study is to present an algorithm for improving the safety and effectiveness of transitions of care (ToC) in the emergency department (ED). METHODS: This project was undertaken by the Council of Emergency Medicine Residency Directors (CORD) Transitions of Care Task Force and guided by the six-step Kern model for curriculum development. A targeted needs assessment in survey form was designed using a modified Delphi method among the CORD ToC Task Force. The survey was designed for four subgroups within the ED: emergency medicine (EM) residency program directors, EM academic chairpersons, EM residents, and EM nurses. Members from nationally recognized EM organizations assisted in the development of each respective survey, including the Academic Affairs Committee of the American College of Emergency Physicians, the leadership of the Emergency Medicine Residents' Association (EMRA), and the leadership of Emergency Nurses Association (ENA). The surveys contained questions about current handoff practices and asked participants to rate the importance of key logistical and informational parameters within a ToC. Survey validity was achieved through content validity, item analysis, format familiarity, and electronic scoring. The surveys of program directors and academic chairpersons were distributed through the CORD listserv, the resident survey was distributed via EMRA correspondents, and the nurse survey was distributed through the ENA listserv. Following survey collection, the ToC Task Force convened and used the data to assess handoff practices and deficiencies. The Task Force developed recommendations for a ToC algorithm that was then piloted by medical educators in their institutions. These educators shared their experiences with senior department members in a phone interview. This informant feedback was used to address deficiencies in the algorithm and finalize the recommendations from the CORD Task Force. RESULTS: The surveys for program directors (n = 147), academic chairpersons (n = 99), residents (n = 194), and nurses (n = 902) were electronically scored. Handoff education in the form of structured workshops or classes was typically not offered, with only 10.9% of residents and 9.0% of nurses reporting that they received such training. The majority (93.9%) of EM academic chairpersons stated that assessments of handoff proficiency were not conducted within their programs. Computerized handoff was the most popular assistive tool among all surveyed groups. Handoff parameters that were rated as "important" and "extremely important" included uninterrupted time and space to perform the handoff, identification of "high-risk" handoffs, and the opportunity for questions and clarification from the handoff recipient. The developed handoff algorithm consisted of five steps: 1) setting the stage, 2) assembling the team, 3) identification of high-risk patients, 4) shift sign-out, and 5) closing the loop. CONCLUSIONS: The authors present specific guidelines for an algorithm-based approach to transitioning care within the ED. This algorithm is based on surveys of perceived deficiencies and emphasizes informational and logistical parameters within a ToC. Standardizing the process of the ToC may allow for future research on the link between effective ToC and patient outcomes.

Intravenous fat emulsion therapy for intentional sustained-release verapamil overdose.

We report the first case of sustained-release verapamil toxicity treated with Intralipid fat emulsion (IFE). Toxicity was confirmed by elevated serial serum verapamil and metabolite, norverapamil, levels. Most previously reported cases of IFE therapy involve local anaesthetic toxicity and cardiac arrest. Our patient was in shock despite standard therapy. No adverse events were noted and the patient fully recovered.

Role of hydroxocobalamin in acute cyanide poisoning.

OBJECTIVE: To review the recently approved cyanide antidote, hydroxocobalamin, and describe its role in therapy. DATA SOURCES: Relevant publications were identified through a systematic search of PubMed using the MeSH terms and key words hydroxocobalamin and cyanide. This search was then limited to human studies published since 2000. Systematic searches were conducted through January 2008. References from identified articles were reviewed for additional pertinent human studies. STUDY SELECTION AND DATA EXTRACTION: The literature search retrieved 7 studies on the safety and/or efficacy of hydroxocobalamin in humans. Four new studies were identified by the search and 3 studies were identified from the references. DATA SYNTHESIS: Studies of antidote efficacy in humans are ethically and logistically difficult. A preclinical study demonstrated that intravenous doses of hydroxocobalamin 5 g are well tolerated by volunteer subjects. Hydroxocobalamin has been shown to reduce cyanide concentrations in controlled studies of nitroprusside therapy and in heavy smokers. A retrospective study of 14 acute cyanide poisonings also demonstrated hydroxocobalamin's safety and efficacy. Two studies examining hydroxocobalamin for smoke inhalation-associated cyanide poisoning indicated a possible benefit, but they are insufficient to establish definitive criteria for use in this setting. Randomized controlled trials of hydroxocobalamin and traditional cyanide antidotes (nitrites/thiosulfate) are lacking. CONCLUSIONS: Cyanide poisoning can rapidly cause death. Having an effective antidote readily available is essential for facilities that provide emergency care. In cases of cyanide ingestion, both the nitrite/thiosulfate combination and hydroxocobalamin are effective antidotes. Hydroxocobalamin offers an improved safety profile for children and pregnant women. Hydroxocobalamin also appears to have a better safety profile in the setting of cyanide poisoning in conjunction with smoke inhalation. However, current data are insufficient to recommend the empiric administration of hydroxocobalamin to all victims of smoke inhalation.

Recurrent life-threatening ventricular dysrhythmias associated with acute hydrofluoric acid ingestion: observations in one case and implications for mechanism of toxicity.

INTRODUCTION: Hydrofluoric acid (HF) is a weak inorganic acid used for etching and as rust remover. Systemic toxicity is manifested as ventricular dysrhythmias. The mechanisms for these dysrhythmias are not well elucidated. CASE REPORT: An 82-year-old woman ingested 8 ounces of 7% HF. Shortly after emergency department (ED) arrival, she became pulseless, developing recurrent ventricular dysrhythmias. She was defibrillated 17 times and received several doses of calcium, magnesium, and lidocaine. After three hours, she returned to sustained NSR. She was discharged home after four days. DISCUSSION: The electrocardiographic findings in this patient demonstrate hypocalcemia, which has been implicated as the culprit in HF-induced arrhythmias. However, despite correction of the hypocalcemia, the ventricular arrhythmias persisted. The proposed mechanisms of systemic HF toxicity and the relevant literature are discussed. CONCLUSION: Ventricular dysrhythmias due to HF toxicity seem to be independent of either hypocalcemia or hyperkalemia. Systemic toxicity after ingestions may be delayed and precipitous.

Ethylene glycol ingestion treated only with fomepizole.

INTRODUCTION: Ethylene glycol is a widely used chemical that is capable of causing significant injury if ingested. Treatment for ethylene glycol poisoning typically includes basic supportive care, alcohol dehydrogenase inhibition, and hemodialysis. Recent data have suggested that hemodialysis may not be necessary for cases of ethylene glycol poisoning that can be treated with fomepizole as blocking therapy before acidosis or renal dysfunction develops. CASE REPORT: A 33-year-old man presented to the emergency department 1 hour after drinking approximately 1/2 gallon of ethylene glycol antifreeze and an unknown quantity of beer. On arrival he was mildly inebriated but otherwise displayed no other features of ethylene glycol poisoning. Fomepizole therapy was initiated and initial laboratory studies later revealed an osmol gap of 157 mOsm and an ethylene glycol concentration of 706 mg/dL. Nephrology and toxicology services were consulted. Over the next 3 days, fomepizole therapy was continued while the patient's acid-base status and renal function were closely monitored. No evidence of acid-base abnormalities or renal impairment was ever observed and the patient was discharged to psychiatric care on the fourth hospital day. DISCUSSION: This report describes the case of a patient who presented soon after a massive ingestion of ethylene glycol with very high serum concentrations. He was successfully treated using fomepizole and basic supportive care. Our patient developed neither renal insufficiency nor metabolic acidosis. His concomitant ethanol consumption, early presentation, and treatment likely contributed to his favorable outcome. This case report underscores the effectiveness of supportive care and fomepizole in the treatment of ethylene glycol poisoning.

Systemic toxicity after an ocular exposure to xylazine hydrochloride.

There are limited reports of human overdose with the animal tranquilizer, xylazine hydrochloride. The reported effects include hypotension, bradycardia, and respiratory depression. Ocular exposures to xylazine have not been previously reported. A 38-year-old man arrived in the Emergency Department, reporting the accidental irrigation of both eyes with approximately 8 mL of xylazine (100 mg/mL) 30 min before arrival. The patient was asymptomatic. The eyes were copiously irrigated with isotonic crystalloid. Two hours after the exposure, the patient developed sinus bradycardia (40-50 beats/min), hypotension (90/60 mm Hg), and a decreased level of consciousness. The patient was admitted for observation, during which the bradycardia and hypotension were noted to persist. He remained otherwise asymptomatic. The symptoms resolved without intervention, other than i.v. fluids, approximately 25 h after the exposure. The patient was discharged home. This case demonstrates that ocular exposure to xylazine can cause systemic central nervous system and cardiovascular effects.

Iron bezoar retained in colon despite 3 days of whole bowel irrigation.

Concretion formation is a documented complication of large iron ingestions. The generally accepted treatment is supportive care, whole bowel irrigation, and intravenous deferoxamine for systemic toxicity. Laparotomy and gastrotomy have also been used in patients with a high iron burden and bezoar formation. Though experiments suggest that iron is poorly absorbed in the colon, there are no case reports of iron overdose without systemic toxicity, despite a retained colonic bezoar. We report the case of a 16-month-old who presented to an Emergency Department 19 h after an iron ingestion. Initial laboratory studies revealed an anion gap of 14 mEq/L, and a 20 h serum iron concentration of 429 mcg/dL. An abdominal radiograph revealed multiple pills throughout the stomach and small bowel; whole bowel irrigation was initiated. Deferoxamine was administered at 10 mg/kg/h and then stopped when the serum iron level reached 27 mcg/dL, 36 h later. At this time, the abdominal radiograph showed an iron bezoar remaining in the ascending colon despite a clear rectal effluent from whole bowel irrigation. Despite whole bowel irrigation over the next 36 h, the iron bezoar was not removed and actually migrated proximally in the colon. Treatment was stopped on the third day and a normal diet was instituted with prompt passage of the bezoar.

Intentional bupropion overdoses.

Bupropion is an antidepressant that has recently seen increased usage in smoking cessation. This increased usage, along with its potential for causing seizures, has renewed interest among clinicians about the effects of this drug. The purpose of this study is to describe the clinical course of intentional bupropion overdoses in adults and adolescents. This study is a retrospective review of intentional bupropion overdoses reported to regional poison centers over a 2-year period. Our review included 385 cases. Women accounted for 63% of cases and ages ranged from 12 to 57 years. Significant clinical effects were noted in 26% of cases. Seizures were reported in 11% of patients. Seizures occurred within 6 h in most patients. Other prominent effects included tachycardia, agitation, and hallucinations. In conclusion, after a bupropion overdose, patients frequently display agitation, tachycardia, hallucinations and seizures. Seizures commonly occur within 6 h of the ingestion. However, seizures may occur beyond this time frame, particularly if persistent tachycardia, agitation, or hallucinations are noted.

Delayed salicylate toxicity at 35 hours without early manifestations following a single salicylate ingestion.

OBJECTIVE: To report a case of delayed toxicity following a single ingestion of aspirin, where the initial concentrations were nearly undetectable and the patient was completely asymptomatic for the first 35 hours. CASE SUMMARY: A 14-year-old white female was evaluated after a single ingestion of 120 tablets of aspirin 81 mg/tablet hours before arrival to the emergency department. She denied nausea, abdominal pain, tinnitus, or shortness of breath. She received one dose of activated charcoal. The first salicylate concentration (4 h after ingestion) was 1 mg/dL. At 35 hours, the patient became symptomatic (dizziness, tinnitus, epigastric discomfort). Her salicylate concentration at that time was 46 mg/dL. A second dose of activated charcoal was administered, and intravenous bicarbonate with potassium was started as a continuous infusion for 30 hours. DISCUSSION: While delayed salicylate toxicity is well reported in the literature, no report was found regarding concentrations increasing to toxicity 35 hours after ingestion. The delayed aspirin absorption may be due to salicylate-induced pylorospasm or the formation of pharmacobezoars. CONCLUSIONS: In cases with known salicylate ingestion, it is important to follow salicylate concentrations every 4 hours until they are steadily decreasing according to a 4-hour half-life and the patient shows no symptoms of salicylate intoxication.

Unintentional intravenous infusion of Golytely in a 4-year-old girl.

OBJECTIVE: To report an accidental intravenous infusion of Golytely (polyethylene glycol and electrolyte solution; PEG-ELS) in a pediatric patient that did not result in systemic toxicity. CASE SUMMARY: A 4-year-old Hispanic girl presented to the emergency department after ingestion of approximately 24 tablets of 6-mercaptopurine (6-MP) 2 hours earlier. She vomited twice after receiving syrup of ipecac at home. Upon arrival, her vital signs were temperature 36.2 degrees C, heart rate 102 beats/min, respiratory rate 42 breaths/min, and blood pressure 115/67 mm Hg. Her physical examination was normal. The patient received activated charcoal 1 g/kg. Golytely administered through a nasogastric tube was ordered. Upon reevaluation, it was noted that the patient had received 391 mL of Golytely intravenously. The infusion was immediately stopped. There was no evidence of acidosis, renal failure, or ethylene glycol toxicity. She was admitted for observation and was discharged 36 hours later. DISCUSSION: As of April 29, 2004, accidental intravenous infusion of PEG-ELS has not been previously reported. Potential toxicity from Golytely is mainly related to the molecular weight of PEG in the formulation. PEG can theoretically be degraded to ethylene glycol. It is thus important to monitor acid-base status, renal function, and pulmonary function in these patients. CONCLUSIONS: When administered correctly, an infusion of PEG-ELS by nasogastric tube is a safe gastrointestinal decontamination technique used in toxicology; PEG-ELS is not indicated for intravenous administration. Protocols need to be implemented in the workplace to minimize errors in the delivery of treatment to patients. Fortunately, this patient did not have any toxicity from the intravenous infusion of Golytely.

Language preferences among callers to a regional Poison Center.

Providing service to non-English speaking populations is a common challenge facing Poison Centers (PC). Previous studies have identified that people who do not speak functional English are unlikely to call a PC. We developed a survey to determine the language preferences of poison center callers and to identify if we were failing to offer services in languages other than English to callers who felt they needed them. We surveyed 322 parents during routine callbacks about language spoken at home, first and second languages, country of birth, and satisfaction with language used by the PC. We found that 93% primarily spoke English, 5% spoke English and Spanish, and 5% spoke other languages at home in a region where approximately 10% of the population speak English poorly. The majority of respondents were born in the US and were comfortable using English when using the PC. There were 6 cases where callers would have preferred using a different language. Our study supports data suggesting that poison centers are underutilized by people that are recent immigrants and speak English poorly. Awareness programs and educational efforts should be directed toward this sub-population.

Serotonin syndrome with elevated paroxetine concentrations.

OBJECTIVE: To describe a case of serotonin syndrome due to paroxetine and ethanol. CASE SUMMARY: A 57-year-old white man was brought to the emergency department one day after ingesting paroxetine 3600 mg and a pint of hard liquor. He denied the use of any other drug or herbal products and regular use of alcohol. Upon arrival to the hospital, vital signs were blood pressure 188/103 mm Hg, heart rate 114 beats/min, respiratory rate 28 breaths/min, temperature 36.8 degrees C, and O2 saturation 96% on room air. Findings on physical examination included dilated pupils, facial flushing, diaphoresis, shivering, myoclonic jerks, tremors, and hyperreflexia. A tentative diagnosis of serotonin syndrome was made. Initially, cyproheptadine 8 mg was administered orally with no observable effect. An additional 12 mg was given in 3 doses over 24 hours. Symptoms abated slowly over the next 6 days, during which a thorough evaluation failed to reveal any other potential causes for the patient's condition. Serum paroxetine concentrations at 27.5 and 40 hours after ingestion were 1800 and 1600 ng/mL, respectively (normal 20-200 ng/mL). DISCUSSION: Serotonin syndrome is rarely reported in patients taking only one serotonergic medication. Although serum paroxetine concentrations have not been shown to correlate with efficacy or toxicity, our patient's serum paroxetine concentration was 9 times the upper end of the therapeutic range. Cyproheptadine, which has been suggested as a therapy, did not appear beneficial in this patient. Use of the Naranjo probability scale indicated a probable relationship between the serotonin syndrome and the overdose of paroxetine taken by this patient. CONCLUSIONS: More studies are needed to better assess the role of cyproheptadine and other serotonin antagonists in the management of the serotonin syndrome. Regardless of the use of cyproheptadine or other agents, attention should be paid to fluid status, decontamination, and management of hyperthermia, agitation, and seizures.

Death by quinine.

We report a case of a man with a 9.75 g ingestion of quinine. The patient presented with recurrent pulseless wide complex tachycardia for which he received sodium bicarbonate, defibrillation and overdrive mechanical pacing. Despite treatment, the patient died. Quinine is still available for the treatment of leg cramps and drug-resistant malaria. In overdose, quinine affects multiple organ systems, including vision, hearing, the cardiovascular, and renal systems. We review the current approach to quinine intoxication.

Inhalational methanol toxicity in pregnancy treated twice with fomepizole.

We describe a pregnant patient with a long history of inhalant abuse who came to our hospital twice during her pregnancy. In both admissions, she was treated with fomepizol (4-MP), a newly available alcohol dehydrogenase antagonist for treatment of ethylene glycol poisoning.