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Abnormal Umbilical Cord 、 Puerperium
Women’s Hospital School of Women’s Hospital School of Medicine Zhejiang UniversityMedicine Zhejiang University
Wang ZhengpingWang Zhengping
Abnormal Umbilical Cord
Abnormal cord length Cord entanglement Knot of cord Torsion of cord Abnormal cord insertion Cord presentation and cord prolapse Single umbilical artery
Abnormal cord length
Normal cord length is 30-70cm, averagely 50cm Short cord: <30cm is defined as short cord, may
lead to fetal distress, placental abruptio, prolonged labour
Long cord: >80cm is defined as long cord, higher occurrence of cord around neck, cord around body, cord knot, cord prolapse and cord compression
Abnormal cord insertion
Marginal cord insertion into placenta, known as racket placenta
Cord insertion onto membrane, runs between chorionic membrane and amniotic membrane before inserting into placenta, known as velamentous cord insertion
Blood vessels on membrane passing internal cervical os anterior to fetal presenting part, known as vasa previa
Velamentous cord insertion, commonly seen with single umbilical artery
In vasa previa rupture, blood loss of 200-300ml can lead to fetal demise
velamentous cord insertion
velamentous cord insertion
Cord presentation and Cord prolapse
Cord located anterior or lateral to fetal presenting part, known as cord presentation, also known as occult cord prolapse
At membrane rupture, cord prolapse out of cervical os, descending into vagina, known as cord prolapse
Cord prolapse is life-threatening to the fetus
Cord presentation
Cord prolapse
Knot of cord
Cord entanglement
Cord entanglement
The puerperium and complications
definition puerperium puerperial morbidity puerperial infection late postpartum hemorrhage involution of uterus lochia