1. OB 2/3 Evaluation of a Cervix
Transabdominal (TA) evaluation of the cervix should be attempted on every OB2/3 patient
<26wks & TA is suboptimal*?
Transvaginal (TV) evaluation of the cervix is necessary: No
Yes
Prior exam w/ normal cervix**? No
Yes
Yes
<32wks & any of the following are true?
ant low-lying placenta & hx c-section
TA evaluation is abnormal***
hx of cervical incompetence
uncertain placental-cervix relationship****
hx of preterm delivery (<37wks)
abnormal cervix on prior exam
hx of cervical procedure (LEEP, cerclage, etc.)
preterm labor during current pregnancy No
*unable to see and/or cannot be reliably measured
**outside facility is okay, but a report and/or images needed to verify
***funneled and/or shortened (<3cm)
****if placenta is low lying (<2cm), but sonographer doesn’t think TV is beneficial, then review with rad for approval
No TV exam is not necessary