USMLE Prep - Medical Reference Library

Tetanus Prophylaxis — Wound Management

System: Infectious Diseases • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

Assess wound type and vaccination status to decide on Td/Tdap booster and tetanus immune globulin; perform thorough irrigation and debridement.

Key Points

  • Stabilize ABCs; begin targeted evaluation without delaying life-saving therapy.
  • Use system-specific risk tools to guide testing and disposition.
  • Order high-yield tests first; escalate imaging when indicated.
  • Start evidence-based initial therapy and reassess frequently.

Algorithm

  1. Primary survey and vitals; IV access and monitors.
  2. Focused history/physical; identify red flags and likely etiologies.
  3. Order system-appropriate labs and imaging (see Investigations).
  4. Initiate guideline-based empiric therapy (see Pharmacology).
  5. Reassess response; arrange consultation and definitive management.

Clinical Synopsis & Reasoning

For Tetanus Wound Prophylaxis, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as CBC (Inflammation/infection), Lactate (Hypoperfusion), Blood cultures (Pathogen ID). 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 Broad-spectrum antibiotics. Use validated frameworks (e.g., Who Needs TIG?) 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.


Epidemiology / Risk Factors

  • Immunosuppression, devices; recent hospitalization

Investigations

TestRole / RationaleTypical FindingsNotes
CBCInflammation/infectionLeukocytosis/leukopenia
LactateHypoperfusionElevatedTrend
Blood culturesPathogen IDPositive/negativeBefore antibiotics if feasible

Who Needs TIG?

WoundImmunization statusAction
Dirty/majorUnknown or <3 dosesVaccine + TIG
Dirty/major≥3 dosesVaccine if ≥5y since last
Clean minorUnknown or <3 dosesVaccine (no TIG)

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
Tdap/Td vaccineToxoidDaysImmunization updateLocal rxn
TIGPassive immunizationImmediateDirty wounds in non-immuneHypersensitivity

Prognosis / Complications

  • Depends on host and source control; sepsis/organ failure risk

Patient Education / Counseling

  • Explain red flags and when to seek emergent care.
  • Reinforce medication adherence and follow-up plan.

Notes

Use Tdap once if never received as an adult. TIG and vaccine should go into different sites.


References

  1. CDC Tetanus Prophylaxis in Wound Management — Link
  2. WHO Immunization Guidance — Tetanus — Link