The following ultrasound criteria may be used for the diagnosis of cervical ectopic pregnancy:
- an empty uterus,
- a barrel-shaped cervix,
- a gestational sac present below the level of the internal cervical os,
- the absence of the ‘sliding sign’ (when pressure is applied to the cervix using the probe, in a miscarriage, the gestational sac slides against the endocervical canal, but it does not in an implanted cervical pregnancy) and
- blood flow around the gestational sac using colour Doppler (Elson CJ et al., 2016).
Management strategies include systemic methotrexate, ultrasound-guided KCl injection, uterine artery embolism, curettage, ligation of cervical branches of the uterine arteries, paracervical infiltration with dilute vasopressin, and Foley catheter balloon tamponade (Murji A et al., 2015).
- Elson CJ, Salim R, Potdar N, Chetty M, Ross JA, Kirk EJ on behalf of the Royal College of Obstetricians and Gynaecologists. Diagnosis and management of ectopic pregnancy. BJOG 2016;. 123:e15–e55.
- Murji A., Garbedian K., Thomas J., Cruickshank B. Conservative management of cervical ectopic pregnancy. Journal of Obstetrics and Gynaecology Canada. 2015;37(11):1016–1020. doi: 10.1016/s1701-2163(16)30051-2