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Clinical and Experimental Obstetrics & Gynecology  2021, Vol. 48 Issue (5): 1132-1140    DOI: 10.31083/j.ceog4805182
Original Research Previous articles | Next articles
The accuracy of 3D-TUI and 3D power Doppler using Alalfy simple criteria in the diagnosis of placenta accreta spectrum
Mahmoud Alalfy1, 2, *(), Soha Talaat Hamed3, Alaa Sobhi Abd El Ghani3, Ahmed Elgazzar4, Amr Abbassy1, Ahmed S. S. A. Rashwan4, Omar Nagy1, Mohamed A Shalaby4, Hatem Hassan1, Asmaa Ibrahem4, Hesham Kamal5, Reham Mahrous6, Eman Kamal3
1Reproductive Health and Family Planning Department, National Research Centre, 12622 Dokki, Egypt
2Department of Obstetrics and Gynecology, Algezeerah Hospital, 12524 Giza, Egypt
3Radiology Department, Faculty of Medicine, Cairo University, 12624 Cairo, Egypt
4Obstetrics and Gynecology Department, Faculty of Medicine, Cairo University, 12624 Cairo, Egypt
5Urology Department, Cairo University, 12624 Cairo, Egypt
6Anesthesia Department, Cairo University, 12624 Cairo, Egypt
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Abstract  
Background: The aim of our study was to evaluate the accuracy of Three Dimensional Tomographic Ultrasound Imaging (3D-TUI) and 3D power Doppler using Alalfy simple criteria in the diagnosis of placenta previa and PAS (Placenta accrete spectrum) with differentiation of placenta previa (non-adherent placenta) from PAS disorders and determination of its subtypes (Accreta, increta, and percreta). Methods: A prospective observational study that included 90 pregnant women was made at Algezeera Hospital, Egypt. A systematic combined approach using Alalfy simple criteria; with applying the ultrasound criteria suggestive of PAS in the 3D-TUI, and 3D power Doppler ultrasound volume was performed to scan the placenta previa and to assess if it is non-adherent or PAS and to determine its subtype (accreta, increta or percreta). Results: The study shows a high agreement between the 3D-TUI with 3D power Doppler US using Alalfy simple criteria and the operative findings in the diagnosis and differentiation of placenta previa (non-adherent) from PAS (adherent) and its subtypes. The sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy of the 3D-TUI cuts in diagnosing adherent from non-adherent were 100%, 100%, 100%, 100% and 100%, respectively. 3D TUI-cuts has a diagnostic accuracy of 98.8 percent when compared to operative findings in accurately determining the exact subtype of placenta accreta spectrum. Conclusion: The systematic combined approach using Alalfy Simple Criteria for assessment of placenta previa and PAS that entails applying the ultrasound criteria suggestive of PAS in the 3D-TUI—3D power Doppler volume has a high degree of accuracy in the diagnosis of PAS from non-adherent placenta and in accurately diagnosing the subtype of PAS (accreta, increta or percreta). 3D-TUI-cuts facilitates the evaluation of the myometrial thickness and the depth of placental invasion with much better differentiation between different subtypes of PAS with better identification of focal from diffuse invasion with the ability of 3D power Doppler to delineate the vessels invading a part of the myometrium or the whole myometrium, and bridging vessels and high vascularity.
Key words:  Placenta accreta spectrum      TUI      Ultrasound      Placenta      PAS     
Submitted:  27 February 2021      Revised:  15 April 2021      Accepted:  19 April 2021      Published:  15 October 2021     
*Corresponding Author(s):  Mahmoud Alalfy     E-mail:  mahmoudalalfy@ymail.com

Cite this article: 

Mahmoud Alalfy, Soha Talaat Hamed, Alaa Sobhi Abd El Ghani, Ahmed Elgazzar, Amr Abbassy, Ahmed S. S. A. Rashwan, Omar Nagy, Mohamed A Shalaby, Hatem Hassan, Asmaa Ibrahem, Hesham Kamal, Reham Mahrous, Eman Kamal. The accuracy of 3D-TUI and 3D power Doppler using Alalfy simple criteria in the diagnosis of placenta accreta spectrum. Clinical and Experimental Obstetrics & Gynecology, 2021, 48(5): 1132-1140.

URL: 

https://ceog.imrpress.com/EN/10.31083/j.ceog4805182     OR     https://ceog.imrpress.com/EN/Y2021/V48/I5/1132

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