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Home > Meditech info > Meditech Library > What is the difference between a fetal doppler and a ultrasound scanner


What is the difference between a fetal doppler and a ultrasound scanner


There appears to be some confusion surrounding the perceived differences between the ultrasound machines (sonogram machines) used to obtain an image and fetal heartbeat monitors which allows you to listen to your baby's heartbeat.

 Although both technologies use sound waves to obtain information, the waves from an ultrasound machine are much higher (over 40 times higher) than that of a fetal heartbeat monitor. Also, the frequency and variation of probe use (between 2,5-10 MHz probes) and output levels (up to 740 watts) require that only a trained ultrasound technician should perform an ultrasound whereas a fetal heartbeat monitor only has few probe (2,3,4,8 MHz) and one output level (less than 20 watts) so it can be easily and safely used by anyone.

Also, a fetal doppler  is not the same thing as a blood flow doppler (used to check for abnormalities in the umbilical cord). Ultrasound machines used to obtain pictures along with fetal doppler umbilical cord testing are medical procedures that should only be performed by a licensed technician. Fetal heartbeat monitors have been used for well over 50 years and are approved for use at home by pregnant women.

If you have any further questions or concerns regarding the rental of a fetal doppler for home use please call or email us or speak with your healthcare provider.

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