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  • POCUS Promising for...

POCUS Promising for Diagnosing Retained Products of Conception, but Caution Advised in Early Pregnancy: Study

Written By : Medha Baranwal |Medically Reviewed By : Dr. Kamal Kant Kohli Published On 2025-01-19T20:45:47+05:30  |  Updated On 19 Jan 2025 8:46 PM IST
POCUS Promising for Diagnosing Retained Products of Conception, but Caution Advised in Early Pregnancy: Study
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USA: Findings published on January 13 in the American Journal of Emergency Medicine suggest that point-of-care ultrasound (POCUS) is an effective tool for diagnosing retained products of conception in women.

The study led by Dr. Zachary Boivin from Yale University found that POCUS accurately identifies retained tissue in patients undergoing surgical or medical management. The researchers recommend that emergency physicians use POCUS as the first imaging option when diagnosing patients with a history that raises concerns about retained products of conception.

Retained products of conception refer to leftover intrauterine tissue following a recent birth, pregnancy termination, or miscarriage, and occur in 1% to 6% of pregnancies, with higher rates after second-trimester deliveries or pregnancy terminations. Treatment options include dilation and curettage, misoprostol, or continued monitoring.

While ultrasound is the primary method for diagnosing this condition, the study highlights the lack of consistent diagnostic criteria, and research focused on how emergency physicians can use POCUS to identify retained products of conception in emergency settings. To address this gap, Dr. Boivin's team evaluated the effectiveness of POCUS in detecting this condition and reviewed how cases were managed in the emergency department.

For this purpose, the researchers conducted a retrospective cohort study of patients who visited an Emergency Department with over 110,000 annual visits between 2017 and 2023 and underwent pelvic point-of-care ultrasound. They included patients aged 18 or older with no identifiable intrauterine pregnancy on POCUS and excluded males, those older than 55, or patients with inadequate data. Retained products of conception (RPOC) were defined as hyperechoic or heterogeneous products in the endometrium larger than 10 mm on POCUS. The gold standard for diagnosis was radiology ultrasound or obstetrics and gynecology diagnosis for patients without a radiology ultrasound.

The investigation yielded the following findings:

  • The study included 703 patients, with 58 excluded, leaving 645 patients for review.
  • Radiology ultrasound was performed on 512 patients (79.4%), identifying 42 cases of RPOC.
  • Of the 133 patients without a radiology ultrasound, 20 had RPOC confirmed through OBGYN diagnosis, resulting in 62 RPOC cases (9.6% prevalence).
  • 70 POCUS examinations identified RPOC, with 17 indeterminant results.
  • Among 265 patients with a history concerning RPOC, POCUS showed 79.0% sensitivity and 93.8% specificity compared to the gold standard.
  • Including all eight indeterminant results as positive, sensitivity increased to 80.7%, and specificity was 90.4%.
  • Of the 62 RPOC patients, 21 (33.9%) were admitted, 26 (41.9%) underwent surgery, 26 (41.9%) received medical management, and 10 (16.1%) were expectantly managed.

The study concluded that POCUS exhibited high specificity but relatively low sensitivity for diagnosing retained products of conception (RPOC) in patients with a history suggestive of RPOC.

"While POCUS can effectively identify RPOC, we advise caution, particularly in early pregnancy, as the appearance of the endometrium on transabdominal POCUS can vary during this period, potentially complicating the diagnosis," the researchers wrote.

Reference:

Boivin, Z., Barber, D., Chimileski, B., Fetherston, T., Li, J. J., Liu, R., & Moore, C. L. (2025). Accuracy of point-of-care ultrasound in diagnosing retained products of conception. The American Journal of Emergency Medicine, 90, 65-70. https://doi.org/10.1016/j.ajem.2025.01.032


American Journal of Emergency Medicinepoint-of-care ultrasoundretained products of conception
Source : American Journal of Emergency Medicine
Medha Baranwal
Medha Baranwal

    MSc. Biotechnology

    Dr. Kamal Kant Kohli
    Dr. Kamal Kant Kohli

    Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751

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