Contributor: Travis Barlock, MD Educational Pearls: Wheezing is classically heard in asthma and COPD, but it can be the result of a wide range of processes that cause airflow limitation Narrowed bronchioles lead to turbulent airflow → creates the wheezing Crackles (rales) suggest pulmonary edema which is often due to heart failure Approximately 35%…

Contributor: Jorge Chalit-Hernandez, OMS3 Educational Pearls: Psychedelics are being studied for their therapeutic effects in mental illnesses, including major depressive disorder, post-traumatic stress disorder, anxiety, and many others Classic psychedelics include compounds like psilocybin, LSD, and ayahuasca MDMA and ketamine are often included …

Contributor: Ricky Dhaliwal, MD Educational Pearls: What factors are considered in a COVID-19 infection? The viral load: Understood as the impact of SARS-CoV-2 viral particles infecting host cell tissue itself (utilizing ACE-2 receptors). Pro-Inflammatory Response: Post-infection, the body's downstream systemic cytokine release (can be both normal …

Contributor: Aaron Lessen, MD Educational Pearls: What is a Rescue Inhaler? A rescue inhaler is a medication for people with asthma to quickly reverse the symptoms of an asthma attack. Historically albuterol (Short Acting Beta Agonist (SABA)) monotherapy has been the mainstay rescue inhaler. This is because albuterol works fast and is relatively ch…

Contributor: Geoff Hogan MD Educational Pearls: Penicillin allergies are relatively uncommon despite their frequent reports 10% of the population reports a penicillin allergy but only 5% of these cases are clinically significant 90-95% of patients may tolerate a rechallenge after appropriate allergy evaluation Penicillin Allergy Decision Rule (PEN-…

Contributor: Travis Barlock, MD Educational Pearls: Key clinical considerations when managing heart transplant patients due to their unique pathophysiology 1. Arrhythmias A transplanted heart is denervated, meaning it lacks autonomic nervous system innervation The lack of vagal tone results in an increased resting heart rate Adenosine can be used s…

Contributor: Taylor Lynch, MD Educational Pearls: Pediatric febrile seizures are defined as seizures that occur between the ages of six months to five years in the presence of a fever greater than or equal to 38.0 ºC (100.4 ºF). It is the most common pediatric convulsive disorder, with an incidence between 2-5% What are the types of seizures? Simpl…

Contributor: Aaron Lessen, MD Educational Pearls: Point-of-care ultrasound (POCUS) is used to assess cardiac activity during cardiac arrest and can identify potential reversible causes such as pericardial tamponade Ultrasound could be beneficial in another way during cardiac arrest as well: pulse checks Manual palpation for detecting pulses is impe…

Contributor: Travis Barlock, MD Educational Pearls: What is Hoover’s sign used to identify? This physical exam maneuver differentiates between organic vs. functional (previously known as psychogenic) leg weakness. Organic causes include disease processes such as stroke, MS, spinal cord compression, guillain-barre, ALS, and sciatica, among others In…

Contributor: Jorge Chalit-Hernandez, OMS3 Educational Pearls: CYP enzymes are responsible for the metabolism of many medications, drugs, and other substances CYP3A4 is responsible for the majority Other common ones include CYP2D6 (antidepressants), CYP2E1 (alcohol), and CYP1A2 (cigarettes) CYP inducers lead to reduced concentrations of a particular…

Educational Pearls: Physiologic stimulation of ventilation occurs through changes in levels of: Arterial carbon dioxide (PaCO2) Arterial oxygen (PaO2) Hypercapnia is an elevated level of CO2 in the blood - this primarily drives ventilation Hypoxia is a decreased level of O2 in the body’s tissues - the backup drive for ventilation Patients at risk o…

Contributor: Aaron Lessen, MD Educational Pearls: Quick background info Cardiac arrest is when the heart stops pumping blood for any reason. This is different from a heart attack in which the heart is still working but the muscle itself is starting to die. One cause of cardiac arrest is when the electrical signals are very disrupted in the heart an…

Contributor: Ricky Dhaliwal, MD Educational Pearls: Ketorolac and ibuprofen are NSAIDs with equivalent efficacy for pain in the emergency department Oral ibuprofen provides the same relief as intramuscular ketorolac IM ketorolac is associated with the adverse effect of a painful injection IM ketorolac is slightly faster in onset but not significant…

Contributor: Aaron Lessen, MD Educational Pearls: Colchicine is most commonly used for the prevention and treatment of gout There is research investigating the anti-inflammatory and cardioprotective effects of colchicine This drug has a narrow therapeutic index: a small margin between effective dose and toxic dose Colchicine overdoses can be uninte…

Contributor: Travis Barlock, MD Educational Pearls: What is Portal Vein Thrombosis? The formation of a blood clot within the portal vein, which carries blood from the gastrointestinal tract, pancreas, and spleen to the liver Not only can this cause problems downstream in the liver, but the backup of venous blood can cause ischemia in the bowels How…

Contributor: Jorge Chalit-Hernandez, OMS3 Educational Pearls: Acute mountain sickness (AMS) is the term given to what is otherwise colloquially known as altitude sickness High altitude cerebral edema (HACE) is a severe form of AMS marked by encephalopathic changes Symptoms begin at elevations as low as 6500 feet above sea level for people who ascen…

Contributor: Meghan Hurley, MD Educational Pearls: Gastroenteritis clinical diagnoses: Diarrhea with or without vomiting and fever Vomiting in the absence of diarrhea has a large list of differential diagnoses, so the combination of diarrhea and vomiting in a patient is helpful to indicate the gastroenteritis diagnosis Symptom timeline is usually 1…

Contributor: Aaron Lessen, MD Educational Pearls: If a patient sustains a cut, the provider has several options on how to close the wound. If they choose to suture the wound closed, it involves needles both in the form of injecting numbing medication (lidocaine) as well as with the suture itself. Other techniques are “needleless,” like closing the …

Contributor: Jorge Chalit-Hernandez, OMS3 Educational Pearls: Serotonin syndrome occurs most commonly due to the combination of monoamine oxidase inhibition with concomitant serotonergic medications like SSRIs Examples of unexpected monoamine oxidase inhibitors Linezolid - a last-line antibiotic reserved for patients with true anaphylaxis to penici…

Contributor: Aaron Lessen, MD Educational Pearls: Many patients present to the ED with elevated BP Many are referred from outpatient surgery centers or present after an elevated measurement at home Persistent questions on the best way to treat these patients The AHA published a scientific statement on the management of elevated BP in the acute care…

Contributor: Megan Hurley MD Educational Pearls: What is the mediastinum? The thoracic cavity is separated into different compartments by membranes The lungs exist in their own pleural cavities, and the mediastinum is everything in between The mediastinum extends from the sternum to the thoracic vertebrae and includes the heart, the aorta, the trac…

Contributor: Ricky Dhaliwal MD Educational Pearls: Etomidate was previously the drug of choice for rapid sequence intubation (RSI) However, it carries a risk of adrenal insufficiency as an adverse effect through inhibition of mitochondrial 11-β-hydroxylase activity A recent meta-analysis analyzing etomidate as an induction agent showed the followin…

Contributor: Aaron Lessen MD Educational Pearls: Pregnant patients at high risk of cardiac arrest, in cardiac arrest, or in extremis require special care A useful mnemonic to recall the appropriate management of critically ill pregnant patients is TOLDD T: Tilt the patient to the left lateral decubitus position This position relieves pressure exert…

Contributor: Travis Barlock MD Educational Pearls: What is the ST segment? The ST segment on an ECG represents the interval between the end of ventricular depolarization (QRS) and the beginning of ventricular repolarization (T-wave). It should appear isoelectric (flat) in a normal ECG. What if the ST segment is elevated? This is evidence that there…

Contributor: Alec Coston MD Educational Pearls: Causes of seizures in a fairly well-appearing child with diarrhea: Electrolyte abnormalities: hypocalcemia, hyponatremia Also hyperkalemia which causes arrhythmias and syncope - can appear like seizures Hypoglycemia If the child has diarrhea and appears very sick, differential diagnosis may include: H…