Improved Fetal Heart Rate Study Using Update Actocardiogram

However, developing mechanism of FHR changes was almost unknown, while subjective Fetal Heart Rate (FHR) patterns were discussed in clinical studies, then discrepancies between FHR deceleration and fetal outcome were discussed, and CTG was difficult to clarify fetal complications, though perinatal outcome was reported improved by fetal monitoring . Fetal scalp lead ECG was used to record FHR, then changed to fetal heart sound by Hammaher and Maeda, then further changed to ultrasonic Doppler fetal heart beat signals treated by autocorrelation heart rate meter, because the Doppler fetal heart signal was clearly detected even in the labor and autocorrelation heart rate meter recorded FHR as clearly as fetal scalp ECG. Ominous hypoxic signs were almost unknown, benign physiologic sinusoidal FHR was not separated from ominous pathologic sinusoidal one, fetal non-reactive state was diagnosed by maternal perception of fetal movement, and fetal hiccupping movement was unable to record on the CTG. Discrepancy was discussed between late decelerations and fetal outcome.

Actocardiogram
Actocardiogram

The author intended to compare the FHR to objective fetal movement record on the recording chart, and studied ultrasonic Doppler signals of fetal movement and fetal heart beat, then achieved to objectively differentiate their Doppler signals by their frequencies. Maternal motions developed large Doppler signals; however they were differentiated by their very low frequency.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s