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Vasa previa: prenatal detection by three-dimensional ultrasonography
W Lee1, J S Kirk, C H Comstock
1Division of Fetal Imaging, Department of Obstetrics and Gynecology, William Beaumont Hospital, 3601 West Thirteen Mile Road, Royal Oak, MI 48073-6769, USA.
Summary
Three-dimensional ultrasonography (3D US) enhances antepartum diagnosis of vasa previa. This advanced imaging provides crucial details when conventional 2D ultrasound is inconclusive, improving detection rates.
Area of Science:
- Medical imaging
- Obstetrics and Gynecology
- Fetal medicine
Background:
- Vasa previa poses a significant risk during pregnancy.
- Conventional gray-scale ultrasonography (US) is the primary diagnostic tool.
- Diagnostic challenges can arise with standard two-dimensional (2D) imaging.
Observation:
- This study describes the application of three-dimensional (3D) US in two cases of suspected vasa previa.
- 3D US was utilized in the early third trimester to investigate the condition.
- Specific 3D techniques included multiplanar and surface-rendered views, 'flight-path' analysis, and 'niche-mode' imaging.
Findings:
- 3D US successfully visualized aberrant vessels over the internal cervical os.
- The 'flight-path' technique enabled detailed tracking of vessels toward the internal os.
- Combined with color power Doppler, 3D US confirmed the diagnosis in both cases.
Implications:
- Three-dimensional ultrasonography offers advanced imaging capabilities beyond conventional 2D US.
- It serves as a valuable adjunct for diagnosing vasa previa, particularly in ambiguous cases.
- Enhanced visualization aids in antepartum detection and management planning for vasa previa.