DETERMINE THE DIAGNOSTIC ACCURACY OF TRANSABDOMINAL COLOR DOPPLER ULTRASOUND FOR DIAGNOSING PLACENTA ACCRETA TAKING PER OPERATIVE (CESAREAN SECTION) FINDINGS AS GOLD STANDARD

Abstract

OBJECTIVE:

The objective of this study was to determine the diagnostic accuracy of transabdominal color Doppler ultrasound for diagnosing placenta accreta taking per operative (cesarean section) findings as gold standard.

MATERIAL AND METHOD:

This was a cross sectional survey which was conducted in the Department of Radiology, PNS Shifa, Karachi. The duration of study was 06 months (07-01-14 to 02-06-14 and 01-07-14 to 07-08-14). The study cohort included 270 women who had their transabdominal color Doppler ultrasound in our section as routine obstetrical survey.

RESULTS:

In our study, out of 270 cases, 52.96% (n=143) were between 20-30 years and 47.04% (n=127) were between 31-40 years of age, mean+sd was calculated as 28.94+5.03 years.  Frequency of placenta accreta on the gold standard was recorded in 38.15% (n=103).         Transabdominal Color Doppler Ultrasound for diagnosing placenta accreta showed that 29.26% (n=79) were true positive, 5.93%(n=16) were false positive, 8.89%(n=24) were false negative and 55.93%(n=151) were true negative, while sensitivity, specificity, positive predictive value, negative predictive value and accuracy rate were calculated as 76.70%, 90.42%, 83.16%, 90.42 and 85.19% respectively.

CONCLUSION:

We determined a higher diagnostic accuracy of transabdominal color Doppler ultrasound for diagnosing placenta accreta taking per operative (cesarean section) findings. It is recommended that this diagnostic modality for evaluation of potentially life threatening obstetric disorder is useful.

KEYWORDS:

• Placenta accreta,      diagnosis, color Doppler ultrasound, diagnostic accuracy