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Isolated fluid in the cul-de-sac: how well does it predict ectopic pregnancy?
Robert Dart1, Samuel A McLean, Linda Dart
1Boston Medical Center, and Boston University School of Medicine, Boston, MA, USA.
The American Journal of Emergency Medicine
|January 10, 2002
Summary
Patients with isolated abnormal cul-de-sac fluid face a moderate risk of ectopic pregnancy. This risk significantly increases with larger fluid volumes or echogenic fluid detected via transvaginal ultrasound.
Area of Science:
- Reproductive Medicine
- Emergency Medicine
- Radiology
Background:
- Ectopic pregnancy is a significant cause of maternal morbidity.
- Transvaginal ultrasound is a key diagnostic tool in early pregnancy assessment.
- Cul-de-sac fluid can be a marker for various gynecological conditions, including ectopic pregnancy.
Purpose of the Study:
- To assess the risk of ectopic pregnancy in patients presenting with isolated abnormal cul-de-sac fluid on transvaginal ultrasound.
- To compare the risk of ectopic pregnancy based on the characteristics of cul-de-sac fluid (volume and echogenicity).
Main Methods:
- Retrospective cohort study of Emergency Department (ED) patients from January 1995 to August 1999.
- Inclusion criteria: abdominal pain or vaginal bleeding with a positive beta-hCG test.
- Analysis compared ectopic pregnancy risk in patients with moderate anechoic fluid versus large anechoic or any echogenic fluid.
Main Results:
- Ectopic pregnancy was diagnosed in 42% of patients with isolated abnormal cul-de-sac fluid.
- The risk was 22% for moderate anechoic fluid and 73% for large or echogenic fluid.
- These differences in risk were statistically significant (P =.005).
Conclusions:
- Isolated abnormal cul-de-sac fluid on transvaginal ultrasound indicates a moderate risk of ectopic pregnancy.
- The risk of ectopic pregnancy is elevated when cul-de-sac fluid is large in volume or echogenic.