The Daily Differential — Thursday, April 23, 2026

Esophageal Rupture

Boerhaave syndrome is rare but rapidly fatal if missed; delayed diagnosis sharply increases mediastinitis, sepsis, and mortality. In the ED, it can masquerade as ACS, perforated ulcer, PE, or spontaneous pneumothorax.

By the Blue Fish Med Desk Apr 23, 2026 · Phoenix

At the Bedside

Think of it when: severe chest/epigastric pain after forceful vomiting/retching, recent endoscopy, foreign body/instrumentation, trauma, or sudden pain after heavy lifting.
Classic but uncommon triad: vomiting, chest pain, subcutaneous emphysema. Absence does not exclude it.
Initial priorities:
ABCs, cardiac monitor, pulse oximetry, large-bore IVs
Treat shock/sepsis early with crystalloid resuscitation, vasopressors if needed
NPO immediately
Broad-spectrum IV antibiotics early to cover oral/GI flora including anaerobes
IV PPI
Exam findings: toxic appearance, fever, tachycardia, pleuritic chest pain, neck/chest crepitus, Hamman crunch, epigastric tenderness, decreased breath sounds/pleural effusion.
Workup:
ECG/troponin if chest pain presentation
CBC, CMP, lactate, blood cultures if septic
CXR: left pleural effusion, pneumomediastinum, pneumothorax, widened mediastinum, subcutaneous air
Best ED imaging in many patients: CT chest with IV contrast; many centers also use CT esophagography/oral water-soluble contrast depending on local protocol
Contrast esophagram with water-soluble contrast can identify leak; if negative but suspicion remains high, thin barium study may follow in consultation with surgery/radiology
Avoid routine endoscopy in unstable suspected perforation unless directed by consultants
POCUS: may show pleural effusion or pneumothorax but is not diagnostic.
Definitive management:
Immediate thoracic surgery/general surgery and GI consultation
Drain pleural collections if clinically indicated and in conjunction with consultants
Operative repair, endoscopic stenting, or nonoperative management depends on time from perforation, location, contamination, and patient stability
Disposition: ICU admission. Even seemingly stable confirmed/suspected cases need urgent specialty involvement and close monitoring.

A Classic Presentation

A 52-year-old man presents with sudden severe lower chest and upper abdominal pain after repeated vomiting following heavy alcohol intake. He is tachycardic, diaphoretic, and mildly hypoxic, with faint crepitus over the supraclavicular area. CXR shows a left pleural effusion and pneumomediastinum. He is made NPO, given IV fluids, piperacillin-tazobactam, pantoprazole, analgesia, and emergent thoracic surgery consultation; CT chest with contrast confirms distal esophageal perforation.

Study Directive

Memorize the 5 ED clues: vomiting, sudden chest pain, pneumomediastinum, left pleural effusion, subcutaneous emphysema.
Draw a one-line algorithm from memory: suspect → NPO/IV fluids/antibiotics → CT or contrast esophagram → thoracic surgery.
Review 3 chest pain mimics: esophageal rupture vs ACS vs aortic dissection.
Practice choosing empiric antibiotics for GI perforation in 3 sample patients: no allergy, anaphylactic beta-lactam allergy, septic shock.
Read one thoracic surgery review on operative vs endoscopic management indications.

5 of 5

Neonatal Jaundice

Most neonatal jaundice is benign, but some represents hemolysis, infection, biliary disease, or risk for bilirubin neurotoxicity/kernicterus. In the ED, the...

At the Bedside

First questions:
Age in hours/days?
Feeding well? Weight loss? Wet diapers/stools?
Term or premature?
Onset in first 24 hours?
Total serum bilirubin level and direct/conjugated fraction?
Any fever, lethargy, poor feeding, hypotonia, high-pitched cry?
Physiologic pattern: usually appears after 24 hours of life, peaks around days 3–5 in term infants, infant otherwise well.
Pathologic clues:
Jaundice in first 24 hours
Rapid rise in bilirubin
Signs of hemolysis (ABO/Rh incompatibility, G6PD deficiency, cephalohematoma)
Prematurity
Sepsis/ill appearance
Conjugated/direct hyperbilirubinemia—never normal; think biliary atresia, neonatal hepatitis, metabolic disease, sepsis
History: gestational age, delivery trauma/bruising, blood type incompatibility, family history of hemolytic disease/G6PD, feeding difficulties, stool color (pale stools concerning), urine color, maternal infection, fever.
Exam: jaundice extent, hydration status, cephalohematoma/bruising, hepatosplenomegaly, lethargy, abnormal tone, fever/hypothermia.
Workup:
Total and direct bilirubin (serum if treatment decision needed)
Infant blood type, DAT/Coombs if hemolysis suspected
CBC/retic count
CMP/glucose as indicated
Sepsis evaluation if febrile/ill/toxic
Consider G6PD testing in at-risk infants or unexplained hemolysis
Use the 2022 AAP bilirubin nomogram/guideline based on age in hours and neurotoxicity risk factors
Management:
Ensure adequate feeding/hydration; breastfeeding support is treatment for many benign cases
Start phototherapy if threshold met
Exchange transfusion if severe bilirubin elevation or signs of acute bilirubin encephalopathy; NICU-level care
IVIG may be used in isoimmune hemolysis in selected cases per neonatal guidance
Conjugated hyperbilirubinemia needs broader workup and admission/urgent specialty follow-up
Disposition:
Discharge only if infant appears well, bilirubin below treatment threshold with safe follow-up in 24 hours or per guideline, and feeding/hydration are adequate
Admit/NICU for phototherapy needs beyond outpatient capability, hemolysis, sepsis concern, neurologic signs, exchange transfusion consideration, or conjugated hyperbilirubinemia

A Classic Presentation

A 3-day-old term infant presents for worsening jaundice and poor latch. He is afebrile, alert, and has lost 8% of birth weight. Total bilirubin is elevated but below phototherapy threshold on the age-in-hours nomogram; direct bilirubin is normal and exam is otherwise reassuring. The infant receives feeding support and close follow-up is arranged for repeat bilirubin, whereas the team remains alert for red flags such as fever, first-day jaundice, or direct hyperbilirubinemia.

Study Directive

Open the 2022 AAP bilirubin guideline/nomogram and practice 5 age-in-hours threshold decisions.
Memorize 4 red flags: first 24 hours, ill appearance, rapid rise/hemolysis, direct hyperbilirubinemia.
Review the difference between breastfeeding jaundice and breast milk jaundice.
Practice counseling parents on feeding frequency, dehydration signs, and when to return immediately.
Learn the signs of acute bilirubin encephalopathy: lethargy, hypotonia progressing to hypertonia/opisthotonos, poor suck, high-pitched cry.

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Mechanism Pearl of the Day: Today’s topics all reward pattern recognition tied to anatomy and physiology: rupture causing mediastinal contamination, balloon tamponade mechanically reducing portal variceal bleeding, LFT patterns localizing hepatocellular vs obstructive disease, volvulus strangling mesenteric blood flow, and bilirubin fractions separating physiologic neonatal transition from pathologic cholestasis or hemolysis.

Key Medications

Primary treatment is not a drug:* phototherapy per age-in-hours/risk threshold
IVIG for isoimmune hemolytic disease: commonly 0.5–1 g/kg IV; exact indications and repeat dosing vary—check neonatal guideline/NICU protocol
Empiric neonatal sepsis antibiotics when indicated:
Ampicillin 50 mg/kg IV (interval depends on age/gestation and indication)
Gentamicin 4–5 mg/kg IV/IM (interval varies)
Exact neonatal dosing is age- and gestation-specific—must check pediatric/neonatal reference
Exchange transfusion thresholds are guideline-based, not fixed-dose medication decisions.

High-Yield Pearls

Unconjugated bilirubin can cross the immature blood-brain barrier and cause kernicterus; risk depends on level, age in hours, and neurotoxicity risk factors.
Direct/conjugated hyperbilirubinemia is never “physiologic newborn jaundice.”
Breastfeeding failure jaundice is driven by inadequate intake/dehydration; management includes feeding optimization, not reflex formula-only dismissal.

Board Question

Which neonatal jaundice pattern is most concerning for a pathologic process requiring urgent evaluation?

AMild jaundice beginning on day 3 in a well-appearing term infant
BJaundice within the first 12 hours of life
CJaundice peaking on day 4 with normal feeding
DIsolated facial jaundice in a thriving infant

Reveal answer

Correct: B

Jaundice in the first 24 hours is pathologic until proven otherwise and suggests hemolysis, infection, or other serious disease. Early onset is a major red flag for dangerous bilirubin rise.

TheDaily Differential

Esophageal Rupture

At the Bedside

Study Directive

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Liver Function Testing in the ED

Malrotation / Midgut Volvulus

Neonatal Jaundice

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