What is it?
It is a medical imaging technique that uses sound (vibrations in the direction of propagation of the wave) high frequency to obtain images inside the body.
How it works
The sound is reflected differently by different tissues, according to (approximately) content in liquid. Moreover, the so-called “Doppler effect”, the exacerbations (increase frequency) tones in motion moving toward the listener and be serious that they walk away, provides information on speed and movement of the blood. Although there are different “modes” of operation of the ultrasound, general-use a single receiver transducer (the same device emits and receives ultrasound). A computer program converts the information received images are displayed on a screen can be printed or videotape.
Requested for
Ultrasound has replaced other imaging scans, for its lack of side effects and the immediacy of the test, especially: high abdominal exploration, primarily hepatobiliary, where the contrast between the vasculature bladder, liver tissue and possible stone is large. Urology, exploration high for the same reasons, ranging study of the prostate using transrectal ultrasound. Obstetrics, which allows an unsurpassed level of detail without side effects or contraindications. In cardiology and vascular surgery, which can determine the velocities has proved very useful, and is also one of the best techniques (“M-mode,” in one dimension), to assess the movements of the heart valves.
How is the examination
Gas is a great enemy of the ultrasound, so it may be recommended diet for lowering in case of digestive scheduled ultrasound.
In all other cases there is usually no preparation necessary. TO LEAVE TO DO THE TEST The exploration area will be revealed. Go easy on clothes and take off. To improve transmission between the device and the skin is used a paste, alcohol-based, with which it smears the area to explore. In exploration prostate, gynecological and heart are sometimes inserted into the rectum, vagina or rectum and mouth respectively transducer to be closer to the area to explore and get better images. WHAT IS THE EXAMINATION The doctor will press the transducer over the skin, moving it to obtain more illustrative images. Problems are not wait. LONG DOES About half an hour in general. TELL YOUR DOCTOR IF you afraid or unaware of the technical.
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