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MDSteps- USMLE® Reference Library

Initial Burn Assessment — Primary/Secondary Survey

System: Burn Surgery • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

Structured burn assessment begins with ATLS primary survey, early airway decisioning, exposure with temperature control, and calculation of TBSA using Lund–Browder for adults/children.

Key Points

  • Follow ATLS primary survey: Airway with C-spine control, Breathing, Circulation, Disability, Exposure (ABCDE).
  • Identify and treat life threats before complete diagnosis; activate massive transfusion when indicated.
  • Use damage-control resuscitation principles and early hemorrhage control.

Algorithm

  1. Primary survey (ABCDE) with adjuncts (E-FAST, chest/pelvis X-ray).
  2. Resuscitate with balanced blood products; TXA early in select trauma (<3 h).
  3. Secondary survey and definitive imaging (CT) when stable; early operative/interventional control as needed.

Clinical Synopsis & Reasoning

For Burn Surgery Initial Assessment Primary Secondary Survey, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as E-FAST (Detect free fluid/pneumothorax), Trauma labs (type & cross, lactate) (Resuscitation guide), CT (pan-scan when stable) (Injury mapping). Incorporate bedside imaging and targeted labs to define severity and identify complications; synthesize results with clinical trajectory to refine the working diagnosis and disposition needs.


Treatment Strategy & Disposition

Initiate disease‑directed therapy alongside supportive care, titrating to objective response. Pharmacologic options commonly include TXA (within 3 h), Analgesia/sedation, Antibiotics (open fractures). Use validated frameworks (e.g., Depth Clues) to guide escalation and site of care. Address precipitating factors, de‑escalate empiric therapies with data, and arrange follow‑up for monitoring and risk‑factor modification; admit patients with instability, high risk of deterioration, or needs for close monitoring.


Management Notes

Document TBSA by region. Photograph wounds at arrival. Avoid ice; use cool running water (not ice) for minor burns.


Epidemiology / Risk Factors

  • High-energy mechanisms; anticoagulated or elderly patients at higher risk

Investigations

TestRole / RationaleTypical FindingsNotes
E-FASTDetect free fluid/pneumothoraxPositive/negativeRapid bedside
Trauma labs (type & cross, lactate)Resuscitation guideElevated lactate, base deficitTrend
CT (pan-scan when stable)Injury mappingLesions identifiedRadiation consideration

Depth Clues

DepthFindings
Superficial partialBlistering, moist, blanching, painful
Deep partialWaxy, sluggish blanch, diminished pin‑prick
Full thicknessLeathery, no blanching, insensate
Fourth degreeMuscle/fascia charred
NoteDepth evolves—reassess in 24–48 h

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
Silver sulfadiazine (topical)AntimicrobialHoursPartial-thickness burnsLeukopenia; sulfa allergy
AnalgesicsPain controlMinutesBurn painSedation
Tetanus prophylaxisVaccine/IG per statusHoursAs indicatedLocal rxn

Prognosis / Complications

  • Outcomes improve with rapid hemorrhage control and protocolized resuscitation

Patient Education / Counseling

  • Injury prevention; follow-up for rehab and psychosocial support

References

  1. ATLS/ABA Initial Care — Link
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