非侵襲Mモード心エコー検査によるマウスでの心拍数の子宮内測定で

Overview

This study demonstrates the use of M-mode ultrasound to measure the heart rates of mouse embryos in utero at E18.5. The noninvasive nature of this technique allows for the maintenance of the embryos' physiological state during imaging.

Key Study Components

Area of Science

• Neuroscience
• Cardiac Imaging
• Embryonic Development

Background

• Ultra-high frequency ultrasound is a powerful imaging tool.
• It allows for live imaging of cardiac abnormalities.
• This method is particularly useful in small animal models.
• Maintaining physiological conditions is crucial for accurate measurements.

Purpose of Study

• To measure heart rates of mouse embryos in utero.
• To utilize M-mode ultrasound for accurate cardiac assessment.
• To explore the implications of heart rate measurements on embryonic development.

Methods Used

• Securely placing the pregnant female on an anesthesia platform.
• Identifying the location of embryos along the abdomen.
• Using a 30 megahertz transducer to measure heart rates.
• Collecting embryo tails for genotyping after measurements.

Main Results

• Heart rates of each embryo were successfully measured.
• Time taken per cardiac cycle was recorded in milliseconds.
• Results provide insights into embryonic cardiac function.
• Demonstrated the feasibility of noninvasive imaging techniques.

Conclusions

• M-mode ultrasound is effective for measuring embryonic heart rates.
• This method preserves the physiological state of embryos.
• Findings may contribute to understanding cardiac development in embryos.

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