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Zorluk: KolayMenstrual Cycle Abnormalities and Contraception

A 28-year-old woman presents to the clinic for a routine well-woman examination. She had a levonorgestrel-releasing intrauterine device (IUD) placed two years ago and reports being highly satisfied with the method. During the speculum examination, the physician is unable to visualize the IUD strings at the external cervical os. The patient is completely asymptomatic, reporting no abdominal pain, fever, or unexpected vaginal bleeding. Arrange the following diagnostic and management steps in the most appropriate chronological sequence to address the missing IUD strings.

  1. 1Perform a urine beta-hCG test
  2. 2Probe the endocervical canal with a cytobrush
  3. 3Perform a transvaginal pelvic ultrasound
  4. 4Obtain an abdominal and pelvic radiograph

Cevap

The correct sequence for managing missing IUD strings is to first exclude pregnancy, then attempt to locate the strings in the endocervix, followed by a pelvic ultrasound if unsuccessful, and finally an abdominal radiograph if the ultrasound is negative.
The management of missing IUD strings in an asymptomatic patient follows a strict algorithmic approach to safely locate the device while minimizing invasive testing. The first step is always to exclude pregnancy with a beta-hCG test, as an enlarging pregnant uterus can pull the strings upward, and pregnancy must be ruled out before inserting any instruments into the cervix. Next, the physician should gently probe the endocervical canal with a cytobrush, as the strings most commonly retract just inside the external os and can often be easily retrieved. If the strings cannot be recovered from the canal, a transvaginal ultrasound is indicated as the first-line imaging modality to determine if the IUD is present and correctly positioned within the uterine cavity. Finally, if the ultrasound fails to demonstrate the IUD in the uterus, an abdominal and pelvic X-ray must be obtained to distinguish between an unnoticed vaginal expulsion and a dangerous uterine perforation with intra-abdominal device migration.

Adım Adım Çözüm

1
Identify the clinical problem.
The patient is asymptomatic but has non-visible IUD strings on speculum examination.
Requires a stepwise approach to locate the device or confirm its expulsion safely.
2
Determine the absolute first step.
Urine pregnancy test.
Rules out an unrecognized pregnancy, which can alter uterine size and draw strings upward, and ensures safety before any cervical manipulation.
3
Select the most appropriate initial physical intervention.
Probe the endocervical canal with a cytobrush.
Strings frequently retract just inside the os; a cytobrush can easily and non-invasively retrieve them back into the vagina.
4
Determine the first-line imaging modality if physical localization fails.
Transvaginal ultrasound.
Safely and accurately visualizes the uterine cavity to confirm whether the IUD is correctly placed, malpositioned, or absent.
5
Select the definitive test if the IUD is absent on ultrasound.
Abdominal and pelvic radiograph.
Differentiates between a device that was expelled unnoticed by the patient and one that perforated the uterus and migrated into the peritoneal cavity.

Anahtar Kavram

Management algorithm for missing intrauterine device (IUD) strings
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Konular

Menstrual Cycle Abnormalities and Contraception

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