Does intrauterine device (IUD) displacement require evaluation in the emergency department (ED)?

IUD Displacement Does Not Routinely Require Emergency Department Evaluation

IUD displacement itself is not an emergency and does not require ED evaluation unless the patient is pregnant, has signs of infection, or has concerning symptoms suggesting perforation with complications.

Clinical Decision Algorithm

The urgency of evaluation depends entirely on the clinical scenario:

Immediate/ED Evaluation Required:

• Pregnancy with IUD in place - Risk of life-threatening septic abortion, ectopic pregnancy, spontaneous abortion, and preterm delivery 1

  • Must evaluate for ectopic pregnancy immediately
  • IUD should be removed as soon as possible if strings visible
  • If strings not visible, ultrasound needed to locate device

• Signs of pelvic inflammatory disease (PID) - Fever, abnormal discharge, pelvic pain

  • Start antibiotics per CDC STI treatment guidelines
  • IUD does not need immediate removal; can reassess in 24-48 hours 1
  • If no clinical improvement after 24-48 hours on antibiotics, consider removal

• Suspected complete uterine perforation with intraabdominal complications - Acute severe pain, peritoneal signs

  • Requires surgical management 2
  • Direct communication with surgeon essential

Outpatient/Non-Urgent Evaluation Appropriate:

• Asymptomatic displacement or malposition - Can be managed in office setting 2, 3

  • Decreased contraceptive efficacy warrants replacement to prevent unplanned pregnancy
  • Schedule for office removal and replacement

• Missing strings without symptoms - Office evaluation with ultrasound

  • May require hysteroscopic removal if embedded in myometrium 2, 4
  • Most "missing string" cases are appropriately positioned IUDs that can be removed in office with proper technique 4

• Partial perforation/embedment - Usually managed outpatient, occasionally requires hysteroscopy 2

Key Evidence Points

The CDC Selected Practice Recommendations [1-1] provide clear guidance that distinguishes true emergencies from situations requiring prompt but non-emergent care. The critical distinction is clinical presentation, not simply the fact of displacement.

For pregnancy with IUD: The evidence shows substantial risks - systematic review of 9 studies demonstrated increased spontaneous abortion (including septic abortion), preterm delivery, and chorioamnionitis when IUD left in place 1. With levonorgestrel IUDs specifically, 8 out of 10 pregnancies ended in spontaneous abortion when not removed 1.

For PID with IUD: Multiple randomized trials showed treatment outcomes do not generally differ between women who retain versus remove the IUD, though appropriate antibiotics and close follow-up are necessary 1. The IUD does not need immediate removal if ongoing contraception desired.

For asymptomatic perforation: Case series suggest that asymptomatic patients with displaced IUDs may benefit from conservative management under certain circumstances, though symptomatic patients require surgical removal 3.

Common Pitfalls to Avoid

1. Don't assume all IUD displacement requires ED evaluation - This leads to unnecessary ED visits and healthcare costs for what is often a scheduled office procedure

2. Don't delay evaluation in pregnant patients - This is the one scenario where timing truly matters for morbidity and mortality

3. Don't immediately remove IUD in PID patients - Evidence shows no benefit to immediate removal; start antibiotics first and reassess 1

4. Don't assume missing strings mean perforation - Most are appropriately positioned IUDs that can be removed in office with proper instruments 4

The bottom line: Triage based on symptoms and pregnancy status, not simply on the fact of displacement. Asymptomatic displacement warrants scheduled office follow-up for replacement to restore contraceptive efficacy, while pregnancy or infection with IUD in place requires urgent evaluation.