Sunday, August 26, 2012

What is a "fetal heart rate doppler"?


This is a short video of one of Csilla's puppies as heard by the hand held fetal heart rate doppler.  Csilla lays quietly on her side while I check the puppy heartbeats, she is such a patience and sweet girl (and I think she likes the treats she gets for the "belly check").
 
A normal puppy heartbeat is between 170-230 BPM (beats per minute) and somewhat resembles the sound of galloping horses.  An adult dog has a heart rate between 90-120 BPM.

Ultrasound doppler equipment has been used in human medicine for over 20+ years to confirm pregnancy and monitor fetus development and well being.   
 
In a canine, fetal heart rates can be detected around Week 5 of gestation.  The doppler detects the motion of the beating heart and translates that motion into an audible heart beat (some dopplers, like mine, have a display showing the heart rate).  Using a doppler throughout gestation allows me to confirm a pregnancy (after Day 30), and approximate the number of fetuses in the litter (Day 45 and up).  I also use the doppler during whelping to monitor the fetusues and communicate any issues to my reproductive veterinarian. 

Pretty cool, huh?