Liquid level
The liquid level is understood to mean the liquid level in a pipe, hose system or generally in a hollow system. If the container is standing still, there is no flow inside and you can ignore molecular forces at the edge, the surface of the liquid is horizontal, i.e. it represents part of a potential surface of the earth's gravity field.
Technically, the constant potential is used, for example, for level measurement in tanks or in hose scales. According to the principle of communicating vessels , a transparent tube is attached to a tank and connected to the tank. The liquid level in the tank and the tube are at the same height, so that the tank content can be read on the measuring tube.
In medicine, the term liquid level is mostly used in radiology , where it describes the interface between liquid on the one hand and air or gas (e.g. intestinal gas) on the other hand in a cavity (e.g. intestine). With a corresponding X-ray projection, a straight, horizontal border with higher transparency above and lower radiation permeability below this mirror is shown. Examples of diseases in which the phenomenon is used diagnostically are:
acute sinusitis
Sero- or haematopneumothorax
swell
- Pschyrembel: Clinical Dictionary, 257th edition , de Gruyter Berlin, New York ISBN 3-11-012692-3