USMLE Prep - Medical Reference Library

IUD Complications — Malposition, Expulsion & Perforation

System: Obstetrics Gynecology • Reviewed: Aug 31, 2025 • Step 1Step 2Step 3

Synopsis:

Evaluate IUD strings and symptoms; use ultrasound for localization when strings not visualized; manage malposition, partial expulsion, or perforation based on device type and reproductive plans.

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 Iud Complications Malposition Expulsion Perforation, frame the differential by acuity and pathophysiology, then align diagnostics to the leading hypotheses. Prioritize stabilization while obtaining high‑yield studies such as CBC (Baseline hematology), BMP (Electrolytes/renal). 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 Analgesia/Antipyretics. Use validated frameworks (e.g., Common Scenarios) 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

Use gentle traction with ring forceps when strings present. Consider pregnancy testing when strings missing.


Epidemiology / Risk Factors

  • Risk factors vary by condition and patient profile

Investigations

TestRole / RationaleTypical FindingsNotes
CBCBaseline hematologyAbnormal counts
BMPElectrolytes/renalDerangements

Common Scenarios

FindingAction
Strings not visualizedUS to confirm location; thread retriever if intrauterine
Low‑lying copper IUDRemove/replace (efficacy reduced)
Low‑lying LNG‑IUDMay observe if asymptomatic; consider replace
Partial expulsionRemove and replace
PerforationSurgical removal

Pharmacology

MedicationMechanismOnsetRole in TherapyLimitations
Piperacillin-tazobactamBroad intra-abdominal coverageHoursSepsis/complicated intra-abdominal infectionAKI
Ondansetron5-HT3 antagonismMinutesAntiemesisQT
Isotonic fluidsVolume expansionHoursResuscitationFluid overload

Prognosis / Complications

  • Prognosis depends on severity, comorbidities, and timeliness of care

Patient Education / Counseling

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

References

  1. ACOG LARC Complications — Link