ERcast: Clinical Perspectives Podcast Preview
The summary below is from an episode of ERcast: Clinical Perspectives
Angioedema can kill by airway obstruction, and the first branch point is histamine versus bradykinin because the treatments diverge early. Sickle cell disease is not just a pain-crisis diagnosis; hypoxia, hemolysis, and falling platelets are the bedside clues to organ-threatening complications.
Angioedema airway and treatment decisions
- Airway-first mortality risk: Airway compromise is the leading cause of death in angioedema, so voice change, drooling, tongue swelling, and inability to lie flat should push immediate reassessment.
- Histamine versus bradykinin: Urticaria and pruritus point toward histamine-mediated disease, while slower swelling without hives suggests bradykinin-mediated angioedema that often ignores standard allergy therapy.
- Difficult airway strategy: When the airway is threatened, awake intubation is preferred when feasible and every attempt needs a double setup because surgical airway is common in true crashes, a practical setup we walk through in the episode.
- Targeted bradykinin therapy: C1 esterase inhibitor replacement is the named first-line therapy for hereditary bradykinin angioedema, while ACE-inhibitor cases have more mixed evidence for targeted agents.
- Low-yield ED testing: C4, C1 inhibitor, and tryptase testing rarely changes emergency management, and CT or plain films should not decide airway safety when direct airway assessment is available.
- Adjuncts and disposition: Tranexamic acid has limited but promising support as a low-cost adjunct, while any tongue, soft palate, or posterior pharyngeal involvement should usually mean ICU-level observation.
Sickle cell emergencies beyond pain
- Pain with danger scan: Treat sickle cell pain as an acute pain crisis unless proven otherwise, but do not let analgesia distract from acute chest syndrome, stroke, splenic sequestration, or severe anemia.
- Core laboratory signals: CBC, CMP, LDH, reticulocyte count, and urinalysis are the key initial studies; reticulocytes show marrow response and transfusion context, not whether the patient is truly in crisis.
- Red flags for admission: Hypoxia, tachycardia out of proportion, platelets under 150, and LDH above 1000 are warning signs for deterioration and should lower the threshold for specialist involvement.
- Acute chest recognition: Acute chest syndrome is vaso-occlusion in the lungs and a leading cause of death; chest x-ray can mimic pneumonia, while diffuse ground-glass on CT makes acute chest less likely.
- Stroke means exchange: A focal neurologic deficit in a patient with sickle cell disease should be treated as sickle-related stroke until proven otherwise, with exchange transfusion prioritized early. We get into the imaging and line-timing nuances in the chapter.
- Analgesia and fluids: Opioids are first-line and often need repeat dosing every 30 minutes early, while routine large-volume normal saline is a poor default in uncomplicated pain crises.
Subscribe to ERcast: Clinical Perspectives to listen to the episode.
References:
- Long B, Rech MA, Gottlieb M. Managing Angioedema. Ann Emerg Med. 2025 Aug 14:S0196-0644(25)01046-7. Epub ahead of print. PMID: 40810708.
Faculty
- Anne Steckowych, APRN
Emergency medicine is in Anne’s blood; her father has been an Emergency Medicine physician for the last 30 years. After earning her nursing degree from the University of New Hampshire (UNH) in 2018, Anne worked as an EMT at her local fire department, gaining practical experience that prepared her for five years as a nurse in the emergency department. She eventually returned to UNH to become an NP and has spent the last 8 years in the same ED, building relationships with a clinical team dedicated to providing the best possible patient care. Outside of the hospital, she’s usually skiing, hiking, or running in the New Hampshire hills. ERcast is her first podcast, and she’s thrilled to be part of the Hippo team.
- Brett Murray, MD
Dr. Murray is an Emergency Medicine physician practicing at a busy community trauma center. After attending Boston University School of Medicine, he completed his residency training at Brown University / Rhode Island Hospital, where he also served as Chief Resident from 2020 – 2021. His clinical interests center on medical education, performance science, and Emergency Medical Services.
- Jeremy Driscoll, MD
Dr. Driscoll is a board-certified in Emergency Medicine physician that practices in Scottsdale, Arizona. He graduated from the University of Arizona with a degree in Molecular & Cellular Biology, graduating Summa Cum Laude and Phi Beta Kappa honors. Dr. Driscoll attended medical school at the University of Central Florida in Orlando, where he was inducted into Alpha Omega Alpha Medical Honor Society. He completed his training in Emergency Medicine at Carolinas Medical Center in Charlotte, North Carolina. Dr. Driscoll also serves as a Clinical Instructor of Emergency Medicine at the University of Arizona College of Medicine - Phoenix.
- Brit Long, MD
Dr. Brit Long is a Professor of Emergency Medicine at the University of Virginia and an emergency medicine physician with experience in both a community ED and at a military academic center ED. He is the Clinical Editor-in-Chief of emDOCs.His professional interests include medical education, evidence-based medicine, and the FOAMed movement. Outside of work, he enjoys spending time with his wife and two daughters
- Julie Kanter, MD
