| 摘要 |
A pressure regulator for vacuum assisted drainage of blood from a patient (1) during a surgical operation, during which the blood drained is transferred to a reservoir (2) in which a vacuum is produced by means of the pressure regulator, the pressure regulator being adapted to reduce a vacuum from a vacuum source to an underpressure with an adjustable set value in the range from 0-300 mm Hg, preferably from 0-100 mm Hg. With a view to eliminate the risk that a lowering of the liquid level in the reservoir will cause an undesirable increase of the vacuum and to make the pressure regulator function as a unit, which simplifies the initial preparations for a surgical treatment, the pressure regulator is adapted to increase the vacuum if it is below the set value and adapted to reduce the vacuum, when the set value is exceeded. |
