Current concepts in ketamine therapy in the emergency department.

Ketamine has been in use since its development as a dissociative anesthetic in the 1960s, but it was largely confined to the operating theater or austere environments until used by emergency physicians to facilitate painful procedures in children. As the unique effects of ketamine across its dose-response curve were understood, new applications emerged. In low doses, ketamine has found an important role alongside or instead of opioids in the management of severe pain, and methods to slow its absorption allow higher, more effective doses while attenuating psychoperceptual effects. Ketamine's unique anesthetic properties have inspired its use as an induction agent for intubation without a paralytic and for the rapid, safe control of dangerously agitated patients. Emerging uses for ketamine in acute care include treatment for status epilepticus and alcohol withdrawal syndrome; however, its most important rising indication may be as an emergency treatment of depression and suicidality.

Management of Pain and Agitation in Trauma.

Polytrauma patients often require medications to treat pain, treat agitation, and facilitate painful procedures. Though analgesia will be deferred in obtunded patients in profound shock, reduced-dose opioids or ketamine should be administered to unstable patients with severe pain with good mental status. Agitation commonly complicates polytrauma presentations, and is treated according to the danger it presents to patient and staff. Severe agitation can be effectively managed with dissociative-dose ketamine, which facilitates ongoing resuscitation, including CT. Severely painful procedures can be effectively facilitated by propofol or dissociative-dose ketamine, with continuous attention to ventilation and application of a step-by-step response to hypoventilation.

Improving Uptake of Emergency Department-initiated Buprenorphine: Barriers and Solutions.

Emergency departments (ED) are increasingly providing buprenorphine to persons with opioid use disorder. Buprenorphine programs in the ED have strong support from public health leaders and emergency medicine specialty societies and have proven to be clinically effective, cost effective, and feasible. Even so, few ED buprenorphine programs currently exist. Given this imbalance between evidence-based practice and current practice, proven behavior change approaches can be used to guide local efforts to expand ED buprenorphine capacity. In this paper, we use the theory of planned behavior to identify and address the 1) clinician factors, 2) institutional factors, and 3) external factors surrounding ED buprenorphine implementation. By doing so, we seek to provide actionable and pragmatic recommendations to increase ED buprenorphine availability across different practice settings.

Description of Adverse Events in a Cohort of Dance Festival Attendees with Stimulant-Induced Severe Agitation Treated with Dissociative-Dose Ketamine.

BACKGROUND: Emergency clinicians often treat severe agitation resulting from intoxicants, psychiatric illness, and other CNS or systemic diseases. Recreational drugs-especially stimulants-are frequently used by attendees of electronic dance music festivals (EDMFs), and festivalgoers may become dangerously agitated and pose an immediate threat to themselves and others. Although benzodiazepines and antipsychotics are classically used to treat severe agitation, these medications are burdened by safety concerns including respiratory depression and cardiac arrhythmias. The effects of ketamine when used to treat severe agitation in an exclusive cohort of patients with psychostimulant drug-induced toxicity (PDIT) has not previously been reported, and existing literature describes a widely variant safety profile when ketamine is used for sedation of the agitated patient. OBJECTIVE: To describe ketamine's adverse event profile when used to treat patients with severe agitation resulting from PDIT. METHODS: This is a retrospective, observational study enrolling consecutive patients who presented for medical attention at a large outdoor EDMF over a period of eight days on two consecutive weekends in the summer of 2017. The EDMF had an estimated attendance of 40,000 per weekend. A medical tent was set up on-site; patients were managed by a team of EMS providers, nurses and emergency physicians. Medications used, adverse events and the need for repeat dosing were abstracted from prehospital care reports. RESULTS: Over the course of eight days, 1081 of 1186 patients who were evaluated in the medical tent had a recorded chief complaint. 274 of these patients (25.3%) had a chief complaint of altered mental status. In patients presenting with AMS, 68 patients (24.8%) had severe agitation that was treated with dissociative-dose (≥4 mg/kg) intramuscular ketamine. The mean initial dose of ketamine was 308 mg. There were four serious adverse events (5.9%): Two patients (2.9%) had copious hypersalivation treated with atropine, one patient (1.5%) had transient apnea requiring assisted ventilation, and one patient (1.5%) was intubated and transported to the hospital. 42 patients (61.8%) required redosing of calming medications. All patients who received ketamine except the single patient who was intubated and transported were observed in the medical tent until resolution of symptoms and discharged back to the festival. CONCLUSION: In this cohort of festival attendees who developed stimulant-induced severe agitation and were treated with dissociative-dose ketamine, serious adverse events occurred in 5.9% of patients including one patient who was intubated.

Early Self-Proning in Awake, Non-intubated Patients in the Emergency Department: A Single ED's Experience During the COVID-19 Pandemic.

OBJECTIVE: Prolonged and unaddressed hypoxia can lead to poor patient outcomes. Proning has become a standard treatment in the management of patients with ARDS who have difficulty achieving adequate oxygen saturation. The purpose of this study was to describe the use of early proning of awake, non-intubated patients in the emergency department (ED) during the COVID-19 pandemic. METHODS: This pilot study was carried out in a single urban ED in New York City. We included patients suspected of having COVID-19 with hypoxia on arrival. A standard pulse oximeter was used to measure SpO2 . SpO2 measurements were recorded at triage and after 5 minutes of proning. Supplemental oxygenation methods included non-rebreather mask (NRB) and nasal cannula. We also characterized post-proning failure rates of intubation within the first 24 hours of arrival to the ED. RESULTS: Fifty patients were included. Overall, the median SpO2 at triage was 80% (IQR 69 to 85). After application of supplemental oxygen was given to patients on room air it was 84% (IQR 75 to 90). After 5 minutes of proning was added SpO2 improved to 94% (IQR 90 to 95). Comparison of the pre- to post-median by the Wilcoxon Rank-sum test yielded P = 0.001. Thirteen patients (24%) failed to improve or maintain their oxygen saturations and required endotracheal intubation within 24 hours of arrival to the ED. CONCLUSION: Awake early self-proning in the emergency department demonstrated improved oxygen saturation in our COVID-19 positive patients. Further studies are needed to support causality and determine the effect of proning on disease severity and mortality.

Prevalence of serious injuries in low risk trauma patients.

OBJECTIVES: Computed tomography (CT) utilization is widespread in contemporary Emergency Departments (EDs). CT overuse leads to radiation exposure, contrast toxicity, overdiagnosis, and incidental findings. This study explores the prevalence of clinically significant injuries in patients identified as low-risk trauma patients (LRTPs) using newly created criteria that account for the patient's age, trauma mechanism, assessability (which relies on level of consciousness, intoxication, and neurologic deficits), vital signs and other evidence of hypoperfusion, bleeding risk, and past medical history. METHODS: This was a 6-month retrospective chart review of all LRTPs presenting to a level 1 trauma center in Queens, New York. Data abstraction was performed independently by two abstractors and discrepancies adjudicated by the senior author. Patients were identified using the hospital trauma registry and two reports, created by the researchers, identifying selected chief complaints and discharge diagnoses. RESULTS: 750 patients were identified of which 352 (46.93%) received one or more CT scans. There were a total of 790 CT scans ordered, of which 731 (92.53%) were negative for acute injury. There were 13 clinically significant injuries of which only one (0.13%) required immediate intervention. There were no mortalities in this LRTP group. CONCLUSION: The prevalence of clinically significant injuries in this population is very low and injuries requiring immediate intervention are even lower. CT utilization in LRTPs should be guided by an explicit consideration of benefit and harm for each patient.

Alternatives to Rapid Sequence Intubation: Contemporary Airway Management with Ketamine.

Endotracheal intubation (ETI) is a high-risk procedure commonly performed in emergency medicine, critical care, and the prehospital setting. Traditional rapid sequence intubation (RSI), the simultaneous administration of an induction agent and muscle relaxant, is more likely to harm patients who do not allow appropriate preparation and preoxygenation, have concerning airway anatomy, or severe hypoxia, acidemia, or hypotension. Ketamine, a dissociative anesthetic, can be used to facilitate two alternatives to RSI to augment airway safety in these scenarios: delayed sequence intubation - the use of ketamine to allow airway preparation and preoxygenation in the agitated patient; and ketamine-only breathing intubation, in which ketamine is used without a paralytic to facilitate ETI as the patient continues to breathe spontaneously. Ketamine may also provide hemodynamic benefits during standard RSI and is a valuable agent for post-intubation analgesia and sedation. When RSI is not an optimal airway management strategy, ketamine's unique pharmacology can be harnessed to facilitate alternative approaches that may increase patient safety.

Exertional Rhabdomyolysis in a Long-Distance Migrant.

BACKGROUND: Exertional rhabdomyolysis is a common condition with potentially life-threatening consequences; early recognition can prevent severe downstream complications. Some migrants and undocumented immigrants who have travelled to the United States have encountered extreme heat or other austere conditions during their journey, many of which have involved long stretches of travel on foot. These factors can combine to put these migrants at risk for rhabdomyolysis. Hospitals near the border of Mexico and the United States commonly encounter patients with adverse medical complications related to the process of border crossing. CASE REPORT: We report a patient with exertional rhabdomyolysis complicated by acute kidney injury who presented to a hospital located thousands of miles from the United States-Mexico border. WHY SHOULD AN EMERGENCY PHYSICIAN BE AWARE OF THIS?: Undocumented immigrants frequently disperse to disparate metropolitan areas after crossing the border, and therefore medical providers should remain vigilant for the medical complications of this dangerous journey.

Thoracic Aortic Syndromes.

Aortic dissection (AD) is a lethal, treatable disruption of the aortic vessel wall. It often presents without classic features, mimicking symptoms of other conditions, and diagnosis is often delayed. Established high-risk markers of AD should be sought and indicate advanced aortic imaging with CT, MRI, or TEE. Treatment is immediate surgical evaluation, aggressive symptom relief, and reduction of the force of blood against the aortic wall by control of heart rate, followed by blood pressure.