(57) A device for displaying and measuring air losses in a chest drainage apparatus (1),
provided with an enclosure with transparent windows which comprises a union (2) for
connection to an end of a tube (3) which is designed to be connected, at the other
end, to the chest cavity of a patient to convey exuded liquids and air losses, and
further comprising a vessel for collecting said liquids, the device further comprising,
within the apparatus at one of the transparent windows, a chamber (5) which contains
liquid (6) on the bottom (5a) and comprises the outlet section (4a) of a duct (4)
for conveying the air losses, further comprising a bell (7) which is arranged above
the outlet section, is immersed in the liquid at least at a lower end area, and is
provided, at the submerged portion, with at least one always-open port (8) for the
outflow of air which is not comprised within the portion of the surface of the bell
that lies directly above the outlet section, and with at least one additional port
(9) for the outflow of air, which is provided with opening and closure means, the
ports for the outflow of the air from the bell being connected to the upper portion
of the liquid containment chamber, which is connected to an evacuation union.
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