Case challenge · Imaging / Obstetrics / Ultrasound · teaching

Cervical Length · Cervical Insufficiency Transvaginal Ultrasound · case challenge

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Case #1Imaging / Obstetrics / Ultrasound

📋 Case data

Mid-trimester transvaginal cervical length (singleton)CL ≤25 mm and spontaneous preterm history / cervix already dilated

Data is taken from this pathway's reviewed node text. Work through the pathway step by step.

Step 1 / 1 · Mid-trimester transvaginal cervical length (singleton)

Mid-trimester transvaginal cervical length (singleton)?

💡 Transvaginal ultrasound (TVU) is the gold standard (empty bladder, sagittal plane, internal to external os, no over-compression, cervix about 50% of the screen). Funneling (internal os opening, progressing downward from the internal os) ± amniotic fluid sludge → raised risk (just document presence, no need to measure funnel depth/width). Short cervix = CL ≤25 mm (<24 weeks).

For teaching. Decisions and their basis are taken from this site's reviewed care pathways; for licensed clinicians/trainees, this does not replace clinical judgment or local protocols.