Biomaterial Database

[Value of transvaginal sonography in diagnosis of placenta previa]. 2001

J M Chen, and Q C Zhou, and R R Wang

Department of Ultrasonography, Second Xiangya Hospital, Central South University, Changsha 410011, China.

OBJECTIVE To investigate the value of transvaginal sonography (TVS) in diagnosis of placenta previa. METHODS Transabdominal sonography(TAS) and TVS localization of the placenta were performed in 78 pregnant women after 35 week's gestation. It was suspected of having placenta previa when the placental edge appeared to be over or within 2 cm in diameter of the internal cervical os demonstrated by TAS or TVS. Final diagnosis depended on diagnosis at delivery. The diagnostic sensitivity, specificity, false-positive rate and coincidence rate were made in comparison between TVS and TAS. RESULTS The sensitivity, specificity, false-positive rate and coincidence rate of TVS were 100%, 90%, 10% and 93.6%, while that of TAS were 71.4%, 60%, 40% and 64.1%, respectively. The coincidence rate of TVS was better than TAS (p < 0.01). CONCLUSIONS TVS is superior to TAS in diagnosis of placenta previa.

UI	MeSH Term	Description	Entries
D010923	Placenta Previa	Abnormal placentation in which the PLACENTA implants in the lower segment of the UTERUS (the zone of dilation) and may cover part or all of the opening of the CERVIX. It is often associated with serious antepartum bleeding and PREMATURE LABOR.	Placenta Praevia
D011247	Pregnancy	The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH.	Gestation,Pregnancies
D005260	Female		Females
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D014463	Ultrasonography	The visualization of deep structures of the body by recording the reflections or echoes of ultrasonic pulses directed into the tissues. Use of ultrasound for imaging or diagnostic purposes employs frequencies ranging from 1.6 to 10 megahertz.	Echography,Echotomography,Echotomography, Computer,Sonography, Medical,Tomography, Ultrasonic,Ultrasonic Diagnosis,Ultrasonic Imaging,Ultrasonographic Imaging,Computer Echotomography,Diagnosis, Ultrasonic,Diagnostic Ultrasound,Ultrasonic Tomography,Ultrasound Imaging,Diagnoses, Ultrasonic,Diagnostic Ultrasounds,Imaging, Ultrasonic,Imaging, Ultrasonographic,Imaging, Ultrasound,Imagings, Ultrasonographic,Imagings, Ultrasound,Medical Sonography,Ultrasonic Diagnoses,Ultrasonographic Imagings,Ultrasound, Diagnostic,Ultrasounds, Diagnostic
D014621	Vagina	The genital canal in the female, extending from the UTERUS to the VULVA. (Stedman, 25th ed)	Vaginas