Prenatal diagnosis of chorionicity in twins.
dc.contributor.author | Hassan, T | |
dc.contributor.author | O'Coigligh, S | |
dc.contributor.author | Higgins, S | |
dc.date.accessioned | 2012-02-01T10:21:43Z | |
dc.date.available | 2012-02-01T10:21:43Z | |
dc.date.issued | 2012-02-01T10:21:43Z | |
dc.identifier.citation | Ir Med J. 2011 Sep;104(8):243-5. | en_GB |
dc.identifier.issn | 0332-3102 (Print) | en_GB |
dc.identifier.issn | 0332-3102 (Linking) | en_GB |
dc.identifier.pmid | 22125879 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10147/207367 | |
dc.description.abstract | The aim of this audit was to assess the accuracy of transabdominal ultrasound scan in predicting chorionicity in twin pregnancies in our unit. The presence or absence of lambda sign, T-sign, dividing membrane thickness and number of placentae were used to determine chorionicity. We retrospectively analysed these antenatal markers in 268 sets of twins delivered over a 5 year period and compared it with the postpartum placental histology and neonatal gender. Of 268 twin deliveries, 204 (76%) had both chorionicity and placental histology to compare. 67 of 84 (80%) were correctly diagnosed antenatally as monochorionic and 137 of 151 (91%) as dichorionic. In 31 cases (15%) the ultrasound diagnosis of chorionicity didn't match placental histology. Seventeen were thought to be monochorionic antenatally but were confirmed dichorionic on placental histology. Overall chorionicity was correctly diagnosed in 171/204 (84%) using transabdominal ultrasound scan (USS) in all trimesters. However the sensitivity and specificity of USS was much higher for dichorionic twins when carried out before 14 weeks of gestation. | |
dc.language.iso | eng | en_GB |
dc.subject.mesh | Adult | en_GB |
dc.subject.mesh | Chorion/*ultrasonography | en_GB |
dc.subject.mesh | Female | en_GB |
dc.subject.mesh | Gestational Age | en_GB |
dc.subject.mesh | Humans | en_GB |
dc.subject.mesh | Pregnancy | en_GB |
dc.subject.mesh | Retrospective Studies | en_GB |
dc.subject.mesh | Sensitivity and Specificity | en_GB |
dc.subject.mesh | *Twins | en_GB |
dc.subject.mesh | Ultrasonography, Prenatal/*methods | en_GB |
dc.title | Prenatal diagnosis of chorionicity in twins. | en_GB |
dc.contributor.department | Our Lady of Lourdes, Drogheda, Co Louth. tayyabahassan@hotmail.com | en_GB |
dc.identifier.journal | Irish medical journal | en_GB |
dc.description.province | Leinster | |
html.description.abstract | The aim of this audit was to assess the accuracy of transabdominal ultrasound scan in predicting chorionicity in twin pregnancies in our unit. The presence or absence of lambda sign, T-sign, dividing membrane thickness and number of placentae were used to determine chorionicity. We retrospectively analysed these antenatal markers in 268 sets of twins delivered over a 5 year period and compared it with the postpartum placental histology and neonatal gender. Of 268 twin deliveries, 204 (76%) had both chorionicity and placental histology to compare. 67 of 84 (80%) were correctly diagnosed antenatally as monochorionic and 137 of 151 (91%) as dichorionic. In 31 cases (15%) the ultrasound diagnosis of chorionicity didn't match placental histology. Seventeen were thought to be monochorionic antenatally but were confirmed dichorionic on placental histology. Overall chorionicity was correctly diagnosed in 171/204 (84%) using transabdominal ultrasound scan (USS) in all trimesters. However the sensitivity and specificity of USS was much higher for dichorionic twins when carried out before 14 weeks of gestation. |