To date, through extensive research no harmful effects have been found. According to the Mayo clinic, a medical authority in North America "in 30 years of regular use, no adverse effects have ever been demonstrated from ultrasound testing. Research has been done investigating both the noise produced in the utero and the heat produced by ultrasound, and no problems have ever been detected from its use in exposed babies.

Doppler is the change of frequency that occurs when an object (such as a spacecraft) has motion relative to you. It manifests itself as the frequency of a received signal being HIGHER as the spacecraft approaches you, dropping and going LOWER than the nominal frequency as it recedes from you. The amount of shift increases with both the velocity and the frequency of the signal in question. On AO-40 Doppler can be as high as 30 KHz on S band. See similar questions...

Doppler ultrasound is a procedure used to detect restricted or blocked arteries, or blood clots in the veins. The study is performed by a sonographer using a probe that is passed over a patient's neck, legs, arms, or abdomen. The probe emits harmless sound waves that create images of a patient's arteries and measure blood flow through the arteries. Unlike x-ray, ultrasound involves no radiation. See similar questions...

The color Doppler machines seem to be very expensive so not every hospital has them. But they are getting more and more popular in time. Every state has at least one of them. The main issue will be awareness of the problem, close follow of the pregnancy and likely limiting activity and sexual activity following 24 weeks of the pregnancy-much as you would with a placenta previa. See similar questions...

Rental units are covered for failure not caused by the renter. If you think you might damage the Doppler during rental you should consider the rental insurance that can be purchased during the checkout process. Rental insurance can not be purchased once the unit has shipped from our facility. Purchased units: Doppler's purchased at the "Used" discounted price are covered under a limited 3 month warranty from date of purchase. See similar questions...

When you are ready to return your Doppler contact us at info@dopplerstodiapers.com or via telephone and we will then place your account on hold in anticipation of receiving the unit back from you within 5 business days. We try to be as flexible as possible with our clients so you don't run into extra charges! See similar questions...

mentioned in other answers, Boxer cardiomyopathy is different from cardiomyopathy in other breeds and Doppler tests are NOT a useful tool for detecting it. A Holter Monitor is the only reliable way of detecting the VPCs that signal BCM. Doppler testing IS used in the assessment of Aortic Stenosis and can be a useful test there. Even then, the regimes recommended in the UK and by the American Boxer Club suggest Doppler only as a follow-up test if a murmur is detected. See similar questions...

When an object emits light or sound, that light or sound will have a particular wavelength. If an object is moving, the object's motion will cause a distortion in the wavelength pattern relative to a "stationary" sensor. Keep in mind that this is an exercise in relativity. From the moving object's perspective, there is no distortion of the wavelength of light. It is sensors that are not moving at the same velocity as the object that will detect the shift in wavelength. See similar questions...

The police use the Doppler Effect when checking for speeding vehicles. A radar gun sends out radar waves at a particular frequency. As the radar wave hits a vehicle, the wave reflects back toward the radar gun at a different frequency. The frequency of the reflected wave depends upon how fast the vehicle is traveling. The faster the speed, the greater the frequency. See similar questions...

Orders placed by 1pm AEST (or AESDT during daylight saving), will be dispatched the same day. After this time it will be dispatched on the next business day. Our courier aims to deliver anywhere within Australia on the next business day during normal business hours. However, next day delivery is not guaranteed. See similar questions...

When we hear sounds, we are actually detecting sound waves with our inner ears. Sound waves require a medium, such as air or water, for transmission. Most Doppler radars use radio waves, rather than sound waves. No medium is required for the transmission of radio waves. See similar questions...

The patient will lie or sit on a table and the sonographer will put a clear warm gel on the skin surface of the area to be studied. The gel helps to transmit the sound waves by excluding air and will not harm your skin or your clothes. The sonographer will then gently press a transducer along the area. If the test is done on your neck, your head will be turned to the side, as if you were looking over your shoulder. During the doppler ultrasound you may hear a "swooshing" noise. See similar questions...

Your doppler should arrive within 2 business days, especially if you live in a major centre such as Toronto, or in the Eastern provinces. Smaller centres and rural areas can generally expect to receive their dopplers within 3 business days. If your doppler has not arrived within the expected time, please contact us to begin a trace to locate the doppler, and to change your billing date to the actual date you received your doppler. See similar questions...

No, that is necessary only in the US for US customers, who are governed by the American FDA regulations. Canada is regulated by Health Canada, who have no requirements such as this at the present time. See similar questions...

Currently, we only rent in Canada. We would be happy to recommend a company that is available to your location. Please email us with your location. Dopplers to Diapers offers Fetal Heart Rate Monitors for home use. Our Dopplers are available for rent or purchase within Canada. We are located in the Lower Mainland of BC. See similar questions...