Diagnostic Accuracy of Saline Sonohystrography vs. 3D Transvaginal Ultrasound for Cesarean Scar Defect Assessment

Not Applicable

Not yet recruiting

• Conditions: Cesarean Scar Defects; Uterine Scar Dehiscence; Vaginal Birth After Cesarean; Abnormal Uterine Bleeding; Cesarean Section Complications
• Interventions: Diagnostic Test: Saline-Infused Sonography (Sonohystrography); Diagnostic Test: Three-Dimensional Transvaginal Ultrasound (3D TVS)

• Registration Number: NCT05996926
• Lead Sponsor: Cairo University

Brief Summary

To compare accuracy of three dimensional transvaginal ultrasound versus the "gold standard" saline infused sonography for assessing the characteristics, frequency and appearance of caesarean scar defects in symptomatic patients with a history of cesarean section.

Detailed Description

Cesarean section (CS) is a frequently performed surgical procedure in obstetric practice. With a significant number of women undergoing this procedure annually, studying its impact on future reproductive capacity has become increasingly important.

The prevalence of cesarean deliveries is rising and constitutes about one-third of all births in both the USA and Italy. As the use of cesarean delivery increases, so do the associated complications, including cesarean scar pregnancy, morbidly adherent placenta, and Cesarean section scar dehiscence and rupture.

Cesarean scar defects (CSD) are described using various terms (pouch, niche, or isthmocoele) and are characterized by thinning of the myometrium or a uterine scar dehiscence, often appearing as a triangular shape within the endometrial cavity.

The exact prevalence of symptomatic Cesarean scar defects varies due to factors like population differences and lack of standardized criteria. Clinical presentations of Cesarean scar defects range from no symptoms to abnormal uterine bleeding, infertility, dyspareunia, and pelvic pain.

Women with a history of Cesarean section are considered high-risk during pregnancy and require specialized assessments to ensure scar integrity. Saline-infused sonography (Sonohystrography) is effective for demonstrating caesarean niches, although transvaginal ultrasound (TVS) is more accessible and commonly used.

Experts generally agree that a niche should be defined by an indentation at the CS scar site with a depth of at least 2 mm, and it can be classified as simple, simple with one branch, or complex with multiple branches. Additional measurements, such as the distances between the niche and the vesicovaginal fold, are useful for surgical planning.

Given the increasing frequency of cesarean deliveries, healthcare providers will encounter related complications more frequently. Cesarean scar defects are common yet often go undiagnosed. Encouraging vaginal birth after cesarean (VBAC) can help reduce cesarean rates and raise questions about future obstetric practices, especially in developing countries.

Study Timeline

• Status Verified: 2023-08
• Study First Submitted: 2023-08-03
• Study First Submitted QC: 2023-08-10
• Last Update Submitted: 2023-08-10
• Study First Posted: 2023-08-18
• Last Update Posted: 2023-08-18
• Study Start: 2023-08-30
• Primary Completion: 2024-08-30
• Study Completion: 2024-08-30

Recruitment & Eligibility

• Status: NOT_YET_RECRUITING
• Sex: Female
• Target Recruitment: 72

Inclusion Criteria

• Age between 20 and 45 years
• Previous 1-3 cesarean sections
• The duration from the last cesarean section ranging from 6 months to 5 years.

Exclusion Criteria

• Pregnancy (Positive pregnancy test)
• Recent pelvic infection.
• Active pelvic infection.
• Recent surgery on the tubes or the uterus.
• Active vaginal bleeding.
• Menstruation.
• Suspected malignancy.
• Intrauterine device in situ.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Saline-Infused Sonography (Sonohystrography)	Saline-Infused Sonography (Sonohystrography)	The Sonohystrography will be performed using a Toshiba ECCO CEE SSA-340A ultrasound equipment with a 7.5 MHz transvaginal probe. A sterile vaginal speculum will be inserted, the cervix cleansed with an antiseptic solution, and a thin Foley's catheter inserted into the cervical os. Sterile saline solution will be infused into the uterus through the catheter to distend the uterine cavity. The examiner will use the ultrasound probe to visualize and assess the uterine cavity, focusing on identifying and measuring Cesarean Scar Defects (CSD) characteristics, including depth, width, volume, and myometrial thickness.
Three-Dimensional Transvaginal Ultrasound (3D TVS)	Three-Dimensional Transvaginal Ultrasound (3D TVS)	In this study, Three-Dimensional Transvaginal Ultrasound will be employed as one of the interventions to evaluate Cesarean Scar Defects (CSD) and associated complications in symptomatic patients with a history of cesarean section. A specialized ultrasound machine (Samsung WS80A) equipped with a transvaginal 2-11 MHz probe will be used for the Three-Dimensional Transvaginal Ultrasound examination. The examination will be conducted in the 1st half of the menstrual cycle. The ultrasound probe will be introduced into the posterior fornix of the vagina to capture three-dimensional images of the uterus and scar area. The examiner will identify and measure the characteristics of the Cesarean Scar Defects (CSD), including length, depth, width, volume, residual myometrial thickness, adjacent myometrial thickness, and presence of any branches.

Primary Outcome Measures

Name	Time	Method
Diagnostic Accuracy of Cesarean Scar Defect Assessment Using 3D TVS	Intraoperatively	This outcome measure aims to evaluate the diagnostic accuracy of three-dimensional transvaginal ultrasound (3D TVS) as measurement tools in assessing Cesarean Scar Defects (CSD) and associated complications among symptomatic patients with a history of cesarean section. The assessment will involve identifying, classifying, and measuring Cesarean Scar Defects (CSD) characteristics using these specific measurement techniques.
Diagnostic Accuracy of Cesarean Scar Defect Assessment Using Saline-Infused Sonography	Intraoperatively	This outcome measure aims to evaluate the diagnostic accuracy of saline-infused sonography (Sonohystrography) as measurement tools in assessing Cesarean Scar Defects (CSD) and associated complications among symptomatic patients with a history of cesarean section. The assessment will involve identifying, classifying, and measuring Cesarean Scar Defects (CSD) characteristics using these specific measurement techniques.

Trial Locations

Locations (1)

Ain Shams University; 🇪🇬 Cairo, Egypt