The fetal doppler your doctor uses is pretty much the same as the one you can buy online and use at home-so similar, in fact, that Alexander says that if her office ran out of them, they’d probably just order more on Amazon. That’s the basic principles of how these devices work and why they’re so simple and inexpensive-because there’s not a lot of integrated circuitry or software that’s required.” “If it’s focused on the heart, it sounds like a galloping horse because the valves of the heart are moving. And the difference in the shifts causes the whoosh, whoosh, whoosh that you hear when you’re listening,” he says. “It’s an ultrasound that doesn’t have a picture,” says Tamika Alexander, MD, an obstetrician and an associate professor of clinical obstetrics and gynecology at the University of Illinois College of Medicine in Chicago. “Blood is going through the blood vessels and through the heart, and that’s what it’s picking up and that’s the sound that we hear.”ĭopplers are small handheld devices with a ’90s vibe: a small, often off-white plastic box with a simple screen and a wand, called a transducer, that the wielder drags over the belly in search of the baby’s heartbeat.Īccording to Joshua Copel, MD, a professor of obstetrics, gynecology, and reproductive sciences at Yale School of Medicine in New Haven, Conn., the device has two primary components (called “crystals”), one of which “is constantly sending out sound the other is constantly listening to the returning sound. Dopplers reflect high-frequency sound waves-aka ultrasounds-off the blood to approximate the sound of blood flowing through the veins. At present, CONTEC produces were distributed to over 130 countries and regions.ĬONTEC adheres to the people-oriented, innovative development ideas, endeavors to achieve the goal of the international market, informative management, diversifiable product, we also dedicate to research and product high-tech products with more advanced in technology, more prefect in function, and more predominant in performance, to work CONTEC to a world-class modern enterprise.Fetal dopplers are a type of ultrasound machine that uses sound waves to “listen” to a baby’s heart. And we have established a modern scientific and effective manufacture system and management system, independently designed and developed many advanced products, such as Pulse Oximeter, Electronic Sphygmomanometer, Blood Pressure Monitor, Arteriosclerosis Examine, 1-12-channel ECG, Portable ECG Monitor, ECG Workstation, Digital Brain Electric Activity Mapping, Dynamic EEG System, Pocket Fetal Doppler, B-ultrasound Diagnostic System, Sleep Apnea Screen Meter, Polysomnography Analysis System, Pulse Rate Meter, Spirometer, Urine Analyzer, Oxygen Concentrator, Patient Monitor and Multi-parameter Vital Signs Monitor, and we own more than 100 national patent, 56 software copyright, our products have passed CE, FDA and COS/VIOS certificate.
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