Ecografia

Ecografia - method graphic registration of changes in the volume of various organs and tissues. Ecografia used in the experiment and allows to judge about changes in the volume of the authorities when filling them with air (light) or blood (heart, the brain).

Ecografia (from the Greek. onkos - mass, volume and grapho - write) - method graphic registration of changes in the volume of various organs and tissues.
Anagrafica installation (eCOGRA) consists of perceiving hard chamber, where is placed a naked body with saved vessels, seals and other entities, appropriate to it, transmitting system and a recorder. The transmission system can be pneumatic, hydraulic or electric. In the latter case, the volume changes register vibrator slavnogo oscilloscope, a cathode tube or Chernyaeva electromagnetic head. The volume changes to the register authority also by means of the so-called electric anagrafe, the principle of which is the following: changes in the volume of the body, containing electrolyte (blood, lymph)determine the fluctuations of the electric conductivity between the electrodes placed on the body. These variations lead to modulation of high-frequency alternating current through the electrodes. A modulated high-frequency component AC increases, detected and delivered to the Registrar that records changes in conductivity between the electrodes. Ecografia allows to judge about changes filling of the body by air (pulmonary ecografia) or blood (ecografia heart, brain, kidneys, spleen, and so on).
The study of the magnitude of the blood supply to the body may also, with the help of so-called indirect ekometrija, which directly takes into account the difference between the amount of blood flowing to the body and flowing from it, for example in terms of perfusion. Cm. also Plethysmography.