Shear Wave Elastography in the Living, Perfused, Post-Delivery Placenta

Area of Science:

• Biomedical Engineering
• Obstetrics and Gynecology
• Medical Imaging

Background:

• The placenta is vital for fetal development, yet its biomechanical properties remain poorly understood.
• Current imaging techniques like ultrasound and Doppler lack detailed assessment of placental tissue elasticity.
• Elastography offers a promising avenue for evaluating tissue mechanical characteristics.

Purpose of the Study:

• To investigate the biomechanical (elastic shear wave) properties of the human placenta.
• To establish a range of normal and potentially pathologic parameters using shear wave elastography.
• To assess the feasibility of using a perfused placental model for advanced imaging studies.

Main Methods:

• Developed a protocol for perfusing whole placentas post-delivery to maintain tissue viability and function.
• Utilized ultrasound, Doppler, and shear wave elastography to examine the perfused placental model.
• Maintained physiological parameters including flow, arterial pressure, and oxygen levels during examination.

Main Results:

• Normal placental tissue on the fetal side exhibited shear wave speeds approximately 2 m/s.
• These speeds are comparable to those observed in animal livers, providing a reference point.
• Abnormal placental tissues demonstrated shear wave speeds outside the normal range.

Conclusions:

• Elastographic measures of the placenta show potential for assessing tissue health and integrity.
• This perfused placental model allows for detailed biomechanical characterization.
• Further research can establish elastography as a valuable tool in obstetric diagnostics.