Dopplerszonda

Dopplerszonda is a medical device used to measure blood flow velocity. It operates on the Doppler effect principle, which describes the change in frequency of a wave in relation to an observer who is moving relative to the wave source. In this context, the Dopplerszonda emits ultrasound waves, which then reflect off moving red blood cells. The reflected waves have a different frequency than the emitted waves, and this frequency shift, or Doppler shift, is proportional to the velocity of the blood flow.

The device typically consists of a transducer that emits and receives the ultrasound waves, and a display unit that processes the Doppler shift information and presents it as a waveform or a numerical value representing blood flow velocity. This technology is non-invasive, meaning it does not require breaking the skin.

Dopplerszondas are employed in various medical settings, primarily in vascular diagnostics. They are used to assess blood flow in arteries and veins, helping to identify conditions such as blockages, narrowing (stenosis), blood clots (thrombosis), and aneurysms. The information gathered can aid in the diagnosis and management of peripheral artery disease, deep vein thrombosis, and stroke risk assessment. Different types of Dopplerszondas exist, including continuous-wave Doppler, which measures velocity but not direction, and pulsed-wave Doppler, which can measure both velocity and direction of blood flow.