| abstract |
A drainage apparatus (199) useable for collecting fluid from a body cavity of a patient by suction, comprising means (108, 180) for generating a negative pressure in the body cavity, and a collection chamber (110) for said fluid, where said chamber comprises connection means for connecting a drainage tube (101) having a first end connectable to the patient, and a second end connectable to the collection chamber (110), where the evacuated air is made to pass through a flow structure that comprises a microelectronic air flow sensor having a number of bridge coupled sensor resistors and a heating resistor for measuring a flow of air during suction, and a flow display organ (107) showing a value corresponding to the said flow of air. |