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...

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...

Yes. In order to use a doppler flowmeter, the liquid must have particulates or bubbles. Most require a minimum size of 25 ppm or 30 μm; check with each doppler flowmeter for specific particle size requirements. 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...

Of course for all patients with ulcerous skin or scab of the lower limbs. Beware not to use a compression bandaging on a venous ulcer without prior checking arterial blood flow. Otherwise for a poorly healing scab = check ABI. Finally for diabetic patients, a combined arteriopathy must be detected. Alternatively, non-audible stethoscopic low blood pressure (SBP) can always be detected thanks to Doppler with a sphygmomanometer. See similar questions...

No. Foetal Doppler needs a 2 MHz frequency whether vascular exploration has to be performed with an 8 to 10 MHz Doppler. See similar questions...

The alcohol is present in the remedy in order to keep it fresh for many years. The amount of alcohol in one dose is extremely small (less than 0.05% when diluted as directed) and should therefore pose no problem. However, if you are still concerned, follow the directions of our Flower and Gem Essences used in pregnancy and dilute the drops in water which has just boiled, allow to cool and then drink. This will allow all the alcohol to evaporate off the essence without reducing its effectiveness. See similar questions...

ABREVA® can be used by adults and children over 12. ABREVA® is considered safe and well tolerated. ABREVA® should be used five times a day for up to 10 days. And because cold sores are contagious, you won't want to share your tube of ABREVA® with others. Doing so may spread the infection. See similar questions...

Currently, there is not enough research to determine vitamin B5's effects on pregnancy (if any). Because of this, we recommend that pregnant mothers do not use Clear5. See similar questions...

Any youth under age 18 can get help at a Safe Place site. If you are having problems at home, suffering from abuse or neglect, lost or in some dangerous situation, with a drunk or unsafe driver, or just need to talk about a problem, go to the nearest Safe Place site. See similar questions...

AED is safe to use by anyone who has been trained to operate it. The American Heart Association recommends that anyone who lives or works where an AED is available for use by lay rescuers participate in a Heartsaver AED course. AEDs, in fact, are so user-friendly that untrained rescuers can generally succeed in attaching the pads and delivering shocks. See similar questions...

While Gaviscon® has not been studied for use during pregnancy, ingredients in this product have been shown to be safe for use during pregnancy. See similar questions...

büji is safe for all external body use, including the face and genitals. Büji is hypoallergenic and dermatologist and pediatrician tested. See similar questions...

The Virulite device is safe to use on children, the time of application remains unchanged at 3 minutes. We recommend that treatment be supervised by an adult to ensure correct use of the device. See similar questions...

Dynamiclear is a natural product. Aside from a mild to strong stinging sensation (felt with the application) Dynamiclear has no known side-effects or contra-indications. Made from all natural components at scientifically formulated concentrations, the ingredients in Dynamiclear have been proven to be safe and non-toxic to skin and mucous membranes. Dynamiclear adheres to International Safety Standards to ensure that your safety and quality expectations are met. See similar questions...

Absolutely not! Do not try to salvage a moldy colony, throw it out along with the tea it was growing in. Chances are very good that the mold has already infiltrated into the colony itself. Sterilize the equipment and start over with a Kombucha colony from another source See similar questions...