Hippo ERcast October 2024

October ERcast intro: Task Switching

Emergency department multitasking is usually task switching, not true parallel work. When a bolus of chest pain, syncope, and sepsis patients lands at once, throughput depends on how you sequence first orders, bedside evaluation, and charting while protecting attention from constant interruptions. ED Task Switching Strategies Initial order front-loading: A few triage-driven orders placed before first contact can shorten time to labs, imaging, and treatment, especially when vitals already identify obvious high-risk physiology. Sickest-first room sequence: A severity-based first pass prioritizes the patient who sounds most unstable, then works down the queue so the highest-acuity problem gets physician attention earliest. Round robin workflow: Seeing each patient and entering orders in the room pairs decision-making with immediate action, while deliberately saving the likely time-intensive case for later preserves flow. Task stacking approach: Starting the HPI and exam immediately after leaving the room uses fresh working memory, then shifts to the next patient before deep charting consumes the whole batch. We get into the tradeoffs in the episode. Disposition-time documentation: One-stop charting at disposition favors a concise MDM-centered note over a long HPI narrative, aiming to reduce repetitive documentation and keep cognitive bandwidth for bedside care. Scribe and workstation limits: Available support and room hardware change what is realistic; a scribe or lack of in-room computers can make batch ordering and delayed charting more workable than continuous documentation. Interruptions and Cognitive Load Multitasking is task switching: Cognitive science suggests most ED multitasking is actually rapid switching between tasks, and performance is best when one of those tasks is highly automatic rather than effortful. Interruption frequency burden: Emergency clinicians are interrupted roughly 7 to 19 times per hour, a steady assault on working memory that helps explain why seemingly simple workflows break down under load. Failure to resume tasks: After an interruption, clinicians do not return to the original task about 62% of the time, a striking number that reframes interruptions as a patient-safety problem, not just an annoyance. Ignoring interruptions rarely works: Simply deciding to ignore interruptions is unrealistic in practice; some data suggest clinicians do so less than 5% of the time, so systems and habits matter more than willpower.

Are You Crazy or is it Just Your Antibodies? Autoimmune Encephalitis

Autoimmune encephalitis is a rare but can’t-miss cause of acute psychosis, especially in previously healthy children and young adults. Anti-NMDA receptor disease dominates the syndrome, and normal CT or even normal MRI does not exclude it. The bedside clues are psychiatric change plus abnormal movements, seizures, or autonomic instability. Autoimmune Encephalitis in Acute Psychosis High-risk clinical pattern: Previously healthy children and young adults with acute or subacute personality change, language disintegration, and new psychosis deserve consideration of autoimmune encephalitis rather than a primary psychiatric disorder. Movement disorder clues: Abnormal orofacial movements and subtle limb movements are classic early clues, with ataxia, chorea, dystonia, myoclonus, or tremor broadening the motor phenotype. Late neurologic red flags: Seizures, prolonged status epilepticus, and autonomic instability signal advancing disease and help separate autoimmune encephalitis from routine psychiatric presentations. Imaging can mislead: CT is almost always normal, and MRI is normal in about 50% of cases, so a reassuring scan should not lower suspicion too quickly. We get into the imaging nuance in the episode. Lumbar puncture priority: All patients with suspected autoimmune encephalitis should undergo lumbar puncture, with CSF typically showing lymphocytic pleocytosis, normal glucose, and only slight protein elevation. EEG and antibody testing: EEG is abnormal in roughly 90% of cases with diffuse slowing, while extreme delta brush is the pathognomonic but uncommon pattern; CSF antibody testing targets anti-NMDA and related panels. Treatment and Disposition Priorities First-line immunotherapy: Initial treatment centers on corticosteroids, IVIG, and plasmapheresis, with escalation to rituximab or cyclophosphamide in refractory cases. Tumor association search: Reproductive-system tumors can drive disease, especially ovarian teratoma, so targeted ultrasound matters because resection can accelerate recovery. Need for higher-level care: Many patients need prolonged ICU-level management for seizures and dysautonomia, and transfer is a strong move if immunotherapy or neurocritical support is not available locally. Anti-NMDA predominance: Anti-NMDA receptor encephalitis accounts for about 90% of autoimmune encephalitis cases, while anti-GABA-B and anti-GAD syndromes are much less common.

Lit Matters 1: Diclofenac vs. Ibuprofen for back pain

Acute, nontraumatic, non-radicular low back pain improves with NSAIDs, but route matters. In a randomized ED trial, oral ibuprofen produced better short-term functional recovery than topical diclofenac, while combination therapy added no clear benefit. NSAID Route for Acute Back Pain ED low back phenotype: The study focused on acute, nontraumatic, non-radicular musculoskeletal low back pain in discharged ED patients, a narrower phenotype than the all-comers back pain population seen on shift. Functional outcome signal: Roland-Morris disability scores improved in all groups by 2 days, but oral ibuprofen showed the largest gain, with about a 10-point improvement from baseline. Topical diclofenac performance: Diclofenac 1% gel was active but less effective than systemic NSAID therapy, and patients using gel alone were more likely to report moderate to severe pain during follow-up. No combination advantage: Adding diclofenac gel to ibuprofen did not produce a meaningful bump over ibuprofen alone, a useful reminder that more NSAID route stacking is not automatically better. When topical still matters: Topical diclofenac remains a reasonable option when oral NSAIDs are contraindicated, but the substitution question is less settled because the trial had no true placebo arm. We get into that bedside nuance in the episode. Applicability caveats: The primary endpoint used the Roland-Morris Disability Questionnaire, and both the ED validation of that tool and the chosen clinically important difference are worth keeping in mind when applying the result.

Bariatric Intubation

Morbid obesity turns airway management into a physiologic emergency: reduced reserve, rapid desaturation, and chest-wall load make crash intubation especially dangerous. Bariatric intubation is won with positioning, preoxygenation with PEEP, and an airway plan built before the patient loses their work of breathing. Bariatric airway and ventilation Early airway decision: Morbidly obese patients in respiratory distress have little reserve and can desaturate fast, so a prepared early intubation is often safer than waiting for a peri-arrest airway. Ramped positioning target: Positioning matters most: raise the patient until the external auditory meatus aligns with the sternal line, a practical ramping endpoint that improves laryngoscopy and mechanics. Triple setup strategy: Have a video laryngoscope, video bronchoscope, and cricothyrotomy kit at the bedside from the start; that full difficult-airway layout is worth hearing in the episode. DSI over RSI: Rapid sequence intubation is a poor fit when induction dosing is uncertain; ketamine-facilitated delayed sequence intubation reduces awareness risk before paralysis. PEEP-first preoxygenation: Preoxygenation should emphasize PEEP because atelectasis is already looming; CPAP, BiPAP, or a BVM with a PEEP valve can meaningfully extend safe apnea time. Post-intubation ventilator approach: Use tidal volume based on predicted body weight, not total body weight, and expect higher PEEP needs because the heavy chest wall commonly requires 10-26 cm H2O.

Never have I ever: Suicide Screening in the ED (Part 1)

Suicidal ideation is common in emergency care, and many at-risk patients will not disclose unless asked directly in a non-stigmatizing way. ED suicide screening centers on structured triage questions, higher-risk presentations such as substance use or unexplained crashes, and rapid identification of patients who may need immediate safety measures. ED Suicide Risk Screening Hidden suicidal ideation: Patients disclose suicidal thoughts more often when clinicians ask plainly and without stigma, which is why passive detection misses a meaningful share of acute risk. High-risk ED presentations: Substance use disorder, especially alcohol or opioid-related visits, and unexplained single-vehicle crashes should raise concern for self-harm even when suicidal intent is not volunteered. Near-term mortality signal: A prior ED visit for suicidal ideation is a major red flag; one study found a 57-fold increase in death over the next 12 months, mostly from suicide. ED-SAFE triage screener: The ED-SAFE approach starts with 3 brief triage questions and escalates positive screens to a secondary assessment, a workflow we walk through in the episode. Secondary risk stratification: The ED-SAFE secondary screener uses 6 focused questions on intent, plan, mood change, and substance use to sort patients into mild, moderate, or high risk. Immediate safety response: Joint Commission guidance treats moderate- or high-risk screens, and patients presenting after an attempt, as indications for constant observation with a 1:1 sitter. Why Screening Still Matters Universal screening rationale: If you screen everyone at triage, you will identify more patients with suicidal ideation than if screening depends on chief complaint or spontaneous disclosure. Outcome evidence limits: No ED screening strategy has clearly shown a mortality benefit, partly because suicidal ideation lacks a consistent gold standard definition across studies. Safety planning benefit: Screening matters when it leads to intervention; safety planning and structured follow-up contact have evidence for reducing later suicide mortality. Lethal means counseling: Asking about access to firearms or other lethal means is not just documentation; means-restriction counseling is associated with lower mortality after discharge.

Lit Matters 2: D-Dimer focused PE testing in ED

Pulmonary embolism workup in the ED often hinges on balancing missed PE against unnecessary CT pulmonary angiography. A simplified d-dimer-focused pathway appears safe for selected low- to moderate-risk patients, but it may trade some imaging efficiency for easier bedside implementation. D-Dimer Focused PE Testing Core pathway finding: For PERC-positive patients at low or moderate pretest risk, a negative age-adjusted d-dimer supported stopping the PE workup without further imaging. Safety signal: Missed PE was rare: only 2 of 5,153 patients who tested negative on the pathway were diagnosed with PE within 30 days, a reassuring result clinicians will want to contextualize in the episode. Imaging tradeoff: The simplified pathway did not produce a clinically meaningful overall drop in CT or VQ imaging, suggesting convenience may come at the cost of maximal scan reduction. Implementation advantage: Protocol adherence improved from 91.3% to 97.6%, supporting the idea that a simpler d-dimer-first strategy is easier to use consistently in real ED workflows. Diagnostic yield effect: PE diagnoses and positive imaging yield both increased after implementation, raising the possibility that more disciplined front-end testing improved who actually reached the scanner. We get into the interpretation caveats in the episode.

Hit below the belt: GU trauma

Genitourinary trauma has a few high-stakes pattern recognitions that change imaging and disposition fast. Testicular rupture needs ultrasound, penile fracture is usually a clinical diagnosis, blood at the meatus means evaluate the urethra before a Foley, and most renal trauma is managed nonoperatively. Scrotal and Penile Trauma Testicular rupture clues: Blunt scrotal trauma with immediate pain and swelling should raise concern for disrupted tunica albuginea, but physical exam alone cannot rule rupture in or out. Ultrasound-confirmed rupture: Scrotal ultrasound is the key test for testicular rupture, with loss of tunica albuginea integrity and possible extrusion of seminiferous tubules as the named findings. Urgent salvage window: Testicular rupture needs urgent rather than torsion-level emergent urologic repair, aimed at preserving blood supply, preventing infection, and maximizing testicular salvage. Classic penile fracture story: Penile fracture classically presents with a felt pop and immediate detumescence during intercourse or vigorous masturbation, followed by rapid swelling and deformity. Eggplant deformity pattern: The combination of eggplant deformity and the classic history is often enough to diagnose penile fracture at the bedside. We get into when imaging still helps in the episode. Overnight operative priority: Penile fracture also needs urgent surgery to preserve erectile function, even though it does not usually demand the same all-out immediacy as a crashing OR emergency. Urethral, Renal, and Bladder Injury Blood at meatus warning: Blood at the meatus after trauma is the classic red flag for urethral injury, and a Foley should wait until the urethra is evaluated. Sex-specific urethral imaging: Suspected urethral injury is worked up with retrograde urethrogram in males and cystoscopy in females, a distinction that matters before instrumentation. We walk through that sequence in the episode. Pelvic fracture association: Posterior urethral injury tracks with severe pelvic fractures, especially pubic symphysis diastasis, where shearing at the bulbomembranous junction is the classic mechanism. Renal trauma imaging: Renal injury should be suspected with gross hematuria or hypotension plus microscopic hematuria, and CT abdomen pelvis with delayed images is the imaging study of choice. Mostly nonoperative kidneys: Most traumatic renal injuries are observed rather than taken to surgery, with intervention reserved for decompensation, significant urinoma, or infectious complications. Bladder rupture split: Pelvic fracture plus gross hematuria makes bladder injury a major concern; intraperitoneal ruptures need operative repair, while extraperitoneal injuries are usually managed with catheter drainage.

Gimme a break: Ultrasound for fractures and dislocations

Point-of-care ultrasound can confirm reduction in shoulder dislocation and distal forearm fracture in real time, often shortening emergency department delays. It works best as an adjunct to radiographs, not a replacement, with the strongest evidence in posterior-approach shoulder scans and post-reduction fracture assessment. Ultrasound for shoulder dislocation Posterior shoulder window: The posterior approach is the key scan for both diagnosis and reduction check, with the probe just below the scapular spine to visualize humeral head alignment against the glenoid. Glenohumeral separation sign: A normal shoulder shows the humeral head abutting the glenoid, while a negative glenohumeral separation distance supports dislocation and gives immediate bedside feedback after a reduction attempt. High diagnostic accuracy: For shoulder dislocation, pooled data show near-perfect sensitivity and specificity, and ultrasound outperforms physical exam alone for both dislocation and associated proximal humeral fracture. Faster reduction workflow: Real-time ultrasound can confirm success without waiting on fluoroscopy and appears to shorten reduction time, especially when the clinical clunk is subtle or body habitus obscures the exam. We get into the image-acquisition nuances in the episode. Adjunct rather than substitute: Pre- and post-reduction radiographs still matter because fracture identification changes risk, technique, and documentation, even when bedside ultrasound strongly suggests a successful reduction. Ultrasound for forearm fractures Reduction over diagnosis: For distal radius fractures, ultrasound is most useful for guiding and confirming reduction rather than replacing X-rays as the primary diagnostic study. Long-axis fracture view: Scanning the distal forearm in the long axis along the dorsal or volar surface lets you watch cortical alignment in real time during manipulation and immediately reassess the endpoint. Certainty after manipulation: Ultrasound reduced clinician uncertainty about adequacy of distal radius reduction and prompted repeat manipulation in about 40% of cases when the initial bedside result looked acceptable. Comparable alignment assessment: Across adult and pediatric studies, post-reduction ultrasound appears comparable to X-ray or fluoroscopy for judging adequacy, without clear evidence that it improves long-term surgical or remanipulation outcomes. Potential throughput benefit: Even without better orthopedic endpoints, ultrasound may decrease emergency department length of stay by replacing delayed imaging checks at the bedside. That practical tradeoff is worth hearing in the chapter. Limits and practical scope Best-supported use cases: The evidence is strongest for shoulder dislocation and distal forearm fracture reduction, where immediate visualization changes bedside decisions in the emergency department. Other dislocation caution: For dislocations outside the shoulder, there is little outcome data showing ultrasound improves confirmation, throughput, or success, so it should remain a quick adjunct rather than a definitive test. Helpful in equivocal exams: Ultrasound is especially useful when exam findings are uncertain, such as an obese patient, a quiet reduction without a clear clunk, or a forearm fracture with ambiguous post-reduction alignment. Resource-limited advantage: When bedside fluoroscopy is unavailable, especially in pediatric forearm reduction, ultrasound offers a practical real-time alternative for checking alignment without leaving the room.

Lit Matters 3: Outcomes for patients with presyncope in ED

Presyncope carries short-term risk much closer to syncope than many clinicians assume. In emergency department presyncope evaluation, 30-day serious outcomes are common enough to justify a syncope-level workup, with disposition guided by risk features, demographics, and the initial ED assessment. Presyncope Risk and ED Evaluation Comparable risk signal: Presyncope is the same symptom complex as syncope minus loss of consciousness, and available evidence suggests its 30-day serious outcome risk is essentially similar rather than reassuringly lower. Thirty-day event range: Serious adverse outcomes after ED presyncope fall in a broad range of about 5% to 25%, a high enough signal to treat these patients with real diagnostic caution. Cardiac outcomes first: Cardiac events dominate the serious outcomes landscape in presyncope, with arrhythmias such as SVT, sinus node dysfunction, and atrial fibrillation showing up more often than many expect. Missed severity bias: Clinicians often perceive presyncope as lower risk than syncope even when outcome rates are similar, a cognitive trap that can soften workup intensity and disposition planning. Disposition by risk profile: Not every presyncope patient needs admission, but many need telemetry, ambulatory monitoring, or expedited follow-up based on demographics, risk factors, and the initial evaluation. We get into that disposition nuance in the episode. Syncope pathway crossover: A structured risk approach matters here, and syncope tools such as the Canadian Syncope Risk Score can help frame decision-making even when the presenting complaint is presyncope.