Hippo ERcast September 2022

Signout Culture

Emergency department sign-out is a patient-safety intervention, not clerical cleanup. High-quality handoffs reduce dropped tasks, missed deterioration, and ownership confusion while keeping end-of-shift transitions efficient in a busy ED. Safer Emergency Department Sign-Out Shared mental model: A strong handoff makes illness severity, likely trajectory, and the next critical decision explicit so the oncoming clinician is not guessing what matters most. Pending task clarity: Outstanding labs, imaging, consultant calls, and reassessment triggers should be assigned clearly because ambiguous to-do lists are where ED handoffs fail. Contingency planning language: The safest sign-out includes anticipated forks in the road such as expected improvement versus likely admission, with practical wording we lay out in the episode. Ownership transfer moment: Sign-out works best when responsibility changes hands at a defined point, reducing the common hazard of two clinicians assuming the other is following up. Efficiency without shortcuts: Concise handoffs beat exhaustive recaps when they foreground the active problem, disposition barrier, and single next action. We get into what that sounds like on the show.

Concussions

Concussion is a clinical syndrome of head injury plus altered memory or mental status, and normal imaging does not rule it in or out. Most athletes recover quickly, but emergency care hinges on accurate diagnosis, smart CT use, and discharge guidance that sets expectations for return to learn and return to play. Concussion Diagnosis and Early Decisions Clinical diagnosis framework: Concussion requires a head injury plus an alteration in memory or mental status; amnesia, delayed verbal response, discoordination, and emotional lability are classic bedside clues. Sideline removal rule: If concussion is suspected during play, immediate removal is the standard because same-day diagnosis can be uncertain and symptoms may evolve after the hit, a distinction we get into in the episode. Imaging limitation principle: CT cannot diagnose concussion because the process is neurochemical rather than structural; imaging is reserved to exclude hemorrhage or other pathology using decision tools or gestalt. Repeat visit reassessment: Persistent post-concussive symptoms after ED discharge do not by themselves mandate imaging; reassess for alternative diagnoses and apply head CT decision support again. Recovery, Follow-Up, and Return to Play Expected recovery timeline: Reassurance matters: about 80% of athletes recover within 7 to 10 days, and roughly 90% have fully recovered by 1 month. Cognitive rest nuance: Strict brain rest is not evidence-based; if reading, schoolwork, texting, or screen time does not worsen symptoms, continued cognitive activity is reasonable. Stepwise return progression: Return to play follows a staged progression from rest to light aerobic activity to sport-specific contact, with symptom freedom required before advancing. We lay out the practical sequence in the chapter. Neuropsych testing limits: Neuropsych testing can support management, but performance is influenced by sleep, hydration, and effort, and it does not predict recovery length or determine who needs neuroimaging. Long-term risk framing: Repeated head trauma is linked to higher risk of chronic neurocognitive disease, but the relationship is nonlinear and likely shaped by multiple factors, including biology.

Lit Matters #1: 10% of Thunderclaps Have Serious Headache Pathology

Thunderclap headache is a meaningful emergency-department red flag: about 1 in 10 patients with abrupt peak-onset headache have a serious secondary cause. Subarachnoid hemorrhage drives much of that risk, but most thunderclap presentations still end up being benign or migraine diagnoses. Thunderclap Headache Risk and Workup Serious pathology signal: A true thunderclap presentation carried a 10.9% rate of serious intracranial pathology versus 6.6% without thunderclap onset, making sudden peak intensity a clinically useful risk marker. Subarachnoid hemorrhage association: SAH was the standout dangerous diagnosis: 3.6% of thunderclap headaches versus 0.3% of non-thunderclap headaches, reinforcing why abrupt onset still changes the differential immediately. Common final diagnoses: Most thunderclap headaches were not catastrophic; benign headache accounted for 42.6% and migraine 23%, a useful reminder that high risk does not mean high probability of SAH. Definition variability problem: Thunderclap history remains imprecise because clinicians variably define it as immediate or near-immediate peak pain, and that bedside wording problem matters more than it first appears. We get into that language nuance in the episode. Imaging practice gap: Nearly 30% of patients with thunderclap headache did not undergo neuroimaging, a striking departure from common emergency-medicine standards and a signal of major practice variation across countries. Lumbar puncture yield: No SAH cases were found by lumbar puncture after normal neuroimaging in this cohort, adding weight to the growing skepticism about routine LP as a rule-out test after a negative scan.

Essentials Masterclass: Trauma Articles You Gotta Know

Hemorrhagic trauma kills through coagulopathy, occult shock, and missed vascular injury before classic hypotension declares itself. Early calcium replacement during massive transfusion, narrow pulse pressure as a pre-crash warning sign, and broader CT angiography use for blunt cerebrovascular injury all have practice-changing implications in trauma resuscitation. Practice-Changing Trauma Resuscitation Pearls Early calcium replacement: Hypocalcemia is common from hemorrhagic shock and citrate load during transfusion, and ionized calcium below 1 mmol/L tracks with higher mortality, greater blood use, and worse coagulopathy. Massive transfusion calcium strategy: Calcium gluconate should be started early when massive transfusion begins rather than waiting for the labs to drift, with a practical ED dosing cadence we lay out in the episode. Narrow pulse pressure warning: A pulse pressure under 30 mmHg can signal acute blood loss before hypotension appears, because systolic pressure falls while diastolic pressure is temporarily preserved by catecholamine surge. Prehospital crash predictor: Normotensive trauma patients with narrow pulse pressure still carry higher mortality and greater need for emergent intervention, making this an early cue to have blood products ready. BCVI stroke prevention: Blunt cerebrovascular injury includes carotid or vertebral dissection and pseudoaneurysm, and missed lesions can progress to thromboembolism and stroke despite an initially distracting trauma presentation. CTA screening expansion: Denver criteria miss a meaningful share of clinically important BCVI, especially higher-grade injuries, so CTA deserves a lower threshold in major blunt trauma. We get into the imaging trigger points in the chapter.

Lit Matters #2: Macrolides Make a Return for Inpatient CAP

Hospitalized pneumococcal pneumonia is not just an “atypical coverage” question. In bacteremic community-acquired pneumonia, adding a macrolide to beta-lactam therapy was associated with lower in-hospital mortality, while respiratory fluoroquinolones did not show the same signal. Macrolides in Inpatient Pneumococcal CAP Guideline context shift: The 2020 IDSA CAP guidelines moved away from routine macrolide use for outpatients because of Streptococcus pneumoniae resistance, but hospitalized patients remained a different clinical lane. Bacteremic CAP mortality signal: In culture-confirmed bacteremic pneumococcal pneumonia, macrolide exposure was associated with better survival from 72 hours after admission to discharge, a clinically meaningful finding in a cohort with about 20% mortality. Azithromycin over quinolones: Azithromycin showed the clearest survival association, whereas respiratory fluoroquinolones did not demonstrate a significant mortality benefit in this hospitalized strep pneumo population. More than atypical coverage: The proposed mechanism is immunomodulation: macrolides may blunt pneumolysin-driven inflammation, which helps explain benefit even when the pathogen is already known to be Streptococcus pneumoniae. We get into that pathophysiology in the episode. Short-course benefit signal: Even fewer than 2 days of macrolide therapy still tracked with improved survival, suggesting the advantage may come early rather than requiring a prolonged add-on course. Practice-changing caution: This was a retrospective nationwide cohort, not an RCT, so the signal is hypothesis-strengthening rather than definitive; the inpatient severity context is the key nuance we walk through in the chapter.

High Risk/Low Prevalence: Asplenia

Asplenia is not just prior splenectomy; functional asplenia and hyposplenia carry real risk for overwhelming infection, thrombosis, and pulmonary hypertension. In the ED, the dangerous miss is early sepsis that looks viral at first, especially in patients with sickle cell disease or other chronic conditions that blunt splenic function. Recognizing Asplenia in the ED Anatomic versus functional loss: Asplenia includes surgical absence of the spleen and a present-but-nonfunctioning spleen, with sickle cell disease as the classic functional example by early childhood. Hyposplenia disease associations: Reduced splenic function shows up across chronic liver disease, HIV, malignancy, thalassemia, celiac disease, lupus, and other inflammatory disorders, so the risk extends well beyond splenectomy. Peripheral smear clues: Howell-Jolly bodies are the classic bedside clue when history is unclear, and characteristic RBC membrane pits also point toward hyposplenism. Bedside identification tools: If the patient cannot give the history, ultrasound can confirm presence or absence of a spleen while the smear helps flag impaired function. We get into the practical recognition pitfalls in the episode. Infection Risk and OPSI Encapsulated organism vulnerability: The spleen is the key organ for clearing encapsulated bacteria, making Streptococcus pneumoniae the headline pathogen along with H. influenzae and Neisseria. High-stakes infection burden: Asplenic patients have a 2- to 3-fold increase in infection, sepsis, and mortality, and a first infection predicts markedly higher risk of another in the next few years. OPSI early presentation: Overwhelming post-splenectomy infection often starts like gastroenteritis or a viral syndrome, then can progress to shock, ARDS, and DIC within hours. Sepsis-first treatment mindset: Treat suspected OPSI like neutropenic sepsis or septic shock, with immediate broad-spectrum antibiotics and aggressive resuscitation rather than watchful waiting. Steroid consideration in shock: Refractory hypotension in these patients should raise concern for adrenal insufficiency, with stress-dose steroids as a reasonable adjunct when fluids and pressors are not enough. Prevention and Long-Term Complications Core vaccine strategy: Pneumococcal, meningococcal, and Haemophilus influenzae type b vaccination are foundational prevention measures for anatomic and functional asplenia. Antibiotic prophylaxis role: Penicillin or amoxicillin is standard prophylaxis after splenectomy, and some high-risk patients need extended or lifelong coverage. Standby antibiotic plans: Many patients carry emergency antibiotics for fever, rigors, or chills, a practical detail that matters when symptoms begin far from care. We cover the real-world counseling nuances in the chapter. Thrombotic complication burden: Asplenia increases risk of arterial and venous thrombosis, including DVT, PE, stroke, MI, and portal vein thrombosis, especially in the months after splenectomy. Pulmonary hypertension signal: Pulmonary hypertension is an underrecognized complication marked by dyspnea, fatigue, chest pain, syncope, or edema, and ED management hinges on avoiding hypoxia, hypotension, and unnecessary intubation.

Lit Matters #3: The Number of Abnormal Vitals at Discharge Matters

An isolated abnormal vital sign at pediatric ED discharge did not increase 48-hour bounceback risk in a large multicenter cohort. The signal changes when abnormalities stack up: two or more abnormal discharge vitals were associated with more revisits, and low oxygen saturation carried a much higher chance of admission on return. Pediatric discharge vital signs Isolated abnormal vital sign: A single abnormal discharge vital sign was common and not associated with higher 48-hour ED revisit rates, a useful counterweight to the reflex that every number must normalize before discharge. Multiple abnormal vital signs: The pattern that mattered was accumulation: children discharged with two or more abnormal vital signs were more likely to bounce back, and we get into the disposition nuance in the episode. Low oxygen saturation signal: Hypoxemia stood out from the rest: low discharge oxygen saturation was not linked to more revisits overall, but every child who returned after being discharged hypoxemic was admitted. Abnormal temperature association: Fever was the abnormal vital sign most clearly associated with revisit risk, reinforcing the practical point that treating temperature can improve comfort even when it does not change the diagnosis. Younger age and acuity: Children under 3 years old and those triaged ESI 1 to 3 were more likely to revisit and need admission, so the illness context still matters more than any isolated discharge number. Serious adverse event rate: Even among bouncebacks, severe outcomes were rare: most admissions were to the general floor, only a few required surgery or PICU, and there were no deaths, CPR, or intubations.

ASA Difficult Airway Guidelines

Difficult airway management starts before the laryngoscope touches the patient: prior difficult airway history, distorted neck anatomy, and bedside exam findings can predict trouble. The 2022 ASA difficult airway guidelines emphasize standard preparation, early backup planning, awake intubation for selected patients, and waveform capnography for confirmation. ASA Difficult Airway Approach Preintubation airway assessment: Prior difficult airway documentation, head and neck radiation, sleep apnea, aspiration history, and distorted anatomy are high-yield clues that should shape the first-pass plan before medications are pushed. Bedside exam predictors: Limited neck mobility, small mouth opening, prominent upper teeth, beard, and upper lip bite test findings all raise the odds of difficult laryngoscopy and difficult rescue. Standardized setup routine: Preparation should be done the same way every time, with suction, oxygenation gear, induction and paralysis drugs, routine equipment, and a difficult airway cart ready before the attempt begins. Primary and backup devices: Video laryngoscopy is strongly favored as the initial device, but the safer move is choosing it alongside at least one backup such as an SGA, bougie, flexible scope, or cric kit. Awake intubation option: Expected difficult airways may be better managed with awake intubation, keeping the patient upright and breathing spontaneously while topical lidocaine supports tolerance. We get into the practical setup in the episode. Definitive tube confirmation: Confirmation starts with seeing the tube pass, but in-line waveform capnography is the preferred standard over colorimetric devices, with bilateral mid-axillary breath sounds as an added check.