Cervical Elastography for Predicting Preterm Birth: Capabilities and Limitations of the Method
Clinical Significance of the Method
According to the ACR-SRU Practice Parameter (2024), cervical elastography during pregnancy is considered a marker of cervical tissue softening and may predict pregnancy loss. This reflects the physiological basis of the method: changes in cervical stiffness precede its structural remodeling.
In addition to obstetric applications, the same document indicates that elastography can help differentiate benign and malignant cervical lesions and predict the depth of invasion.
Limitations of Available Data
The provided source fragments do not specify concrete quantitative stiffness thresholds (kPa or m/s), strain ratio values, or names of validated diagnostic criteria specifically for predicting preterm birth. The ACR/SRU formulation is characterized as "may predict"—indicating a marker rather than a fully validated predictive tool [clarify].
General Methodological Principles of Elastography
Although a specific protocol for the cervix is absent in the fragments, general principles for correctly performing elastography are applicable here. In compression elastography, controlling preload is critical: the method depends on pressure, depth, and artifacts. Excessive precompression distorts stiffness assessment results.
| Aspect | Source Data (ACR/SRU, 2024) |
|---|---|
| Main Application in Pregnancy | Marker of cervical softening; prediction of pregnancy loss |
| Additional Application | Differentiation of benign/malignant lesions, assessment of invasion depth |
| Quantitative Thresholds for Preterm Birth | Not provided [clarify] |
Practical Conclusion
Based on the available fragments, cervical elastography should be considered an additional qualitative/semi-quantitative marker of cervical softening. For clinical application in predicting preterm birth, it is necessary to rely on protocols of specific equipment and institutions, as unified thresholds are not presented in the source [clarify].
Frequently asked questions
What quantitative stiffness threshold indicates the risk of preterm birth?
The specific numerical thresholds are not indicated in the provided source fragments [clarify]. ACR/SRU (2024) describes the method only as a marker of cervical softening.
What does cervical elastography assess during pregnancy?
According to ACR/SRU (2024), it is a marker of cervical tissue softening that may predict pregnancy loss.
Can the method be used in oncological diagnostics of the cervix?
Yes, according to ACR/SRU (2024), elastography can help differentiate benign and malignant lesions and predict the depth of invasion.
Why is preload control important?
Compression elastography depends on pressure, depth, and preload; excessive precompression and artifacts distort tissue stiffness assessment.