Spontaneous abortion complete vs Spontaneous abortion incomplete
How to tell Spontaneous abortion complete and Spontaneous abortion incomplete apart when a board question makes them look alike.
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Retained products on ultrasound separate incomplete from complete abortion.
Side by side
After heavy bleeding and tissue passage, a closed cervical os with empty uterus on ultrasound indicates complete abortion.
Persistent bleeding with open cervical os and retained intrauterine tissue indicates incomplete abortion.
All products of conception have been expelled, so uterine bleeding usually decreases quickly.
Retained products continue uterine atony and bleeding until tissue is expelled or removed.
Transvaginal ultrasound shows no retained echogenic intrauterine tissue and endometrial thickness is typically low, often below 15 mm; serial beta-hCG should decline appropriately.
Ultrasound shows retained products, often heterogeneous endometrial material at least 15 mm with open os and ongoing bleeding; hemoglobin may fall with continued blood loss.
The trap
A common error is expectant discharge despite active bleeding and open os. The resolving clue is retained tissue on ultrasound, which requires uterine evacuation or medical expulsion strategy.
The repair move
Next best step: if hemodynamically stable, manage incomplete abortion with uterine evacuation using suction curettage or medical treatment such as misoprostol 800 mcg vaginally, with repeat dose as needed per protocol. If unstable or hemorrhaging, proceed to urgent surgical evacuation and resuscitation.
Try a free question
CoreA 23-year-old at 10 weeks passes tissue and now has minimal spotting. Cervical os is closed and ultrasound shows empty uterus. What is the most likely diagnosis?
Show answer and explanation
Answer: A. Complete spontaneous abortion. Closed os and empty uterus after tissue passage are classic for complete abortion.
Why the other choices are tempting
- B. Incomplete abortion requires retained tissue and usually continued bleeding with open os.
- C. Ectopic pregnancy would not present with empty uterus after confirmed intrauterine tissue passage pattern.
- D. Molar pregnancy has characteristic ultrasound findings and markedly elevated hCG patterns.
- E. Cervical insufficiency causes painless dilation in second trimester rather than this presentation.
Flashcards
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What ultrasound finding confirms incomplete spontaneous abortion?
Retained intrauterine products of conception, often with persistent bleeding and open os.
What cervical exam finding is typical after complete abortion?
Closed cervical os after passage of all products.
Quick answers
What is the fastest way to tell Spontaneous abortion complete from Spontaneous abortion incomplete?
Retained products on ultrasound separate incomplete from complete abortion.
What is the key clue for Spontaneous abortion complete?
After heavy bleeding and tissue passage, a closed cervical os with empty uterus on ultrasound indicates complete abortion.
What is the key clue for Spontaneous abortion incomplete?
Persistent bleeding with open cervical os and retained intrauterine tissue indicates incomplete abortion.
What is the common trap with Spontaneous abortion complete vs Spontaneous abortion incomplete?
A common error is expectant discharge despite active bleeding and open os. The resolving clue is retained tissue on ultrasound, which requires uterine evacuation or medical expulsion strategy.