Container for drainage of fluids or wound secretion

A container for drainage of fluid and/or wound secretion, comprising:

• an inlet opening to connect with a drainage line, and
• an outlet opening to release waste air accumulated inside the container during drainage,
• wherein the container is pre-evacuated, and is rigid as not to change form when pre-evacuated,
• wherein the outlet opening is sealable, such that the container is transferable in a first operating condition and in a second operating condition,
• wherein, in the first operating condition, the outlet opening is sealed, such that a suction is achievable at the inlet opening by a vacuum inside the container, and
• wherein, in the second operating condition, the outlet opening is opened, such that air is enterable into the container through the outlet opening which neutralizes the vacuum inside the container, whereby drainage of fluid and/or wound secretion is startable according to a vacuum drainage and afterwards is continuable as gravity drainage,
• wherein the outlet opening comprises a first tubular element, which is at least one of clampable or pinchable to seal the outlet opening,
• wherein the outlet opening comprises a filter, which is configured to provide a vent which is operable for at least one of air to release from the container or for air to enter into the container,
• wherein the filter is gas permeable and liquid impermeable;
• and
• wherein the container is pre-evacuated in a range of 40,000 Pascal to 98,000 Pascal.