Portable suction pump unit

A portable suction pump unit for aspirating body fluids, air or both body fluids and air from a patient, comprising:

• a fluid collection container and
• a pump module housing for a pump module, wherein the pump module housing has a pump-side suction connector, wherein the fluid collection container has a container-side suction connector for leaktight connection to the pump-side suction connector, wherein the two suction connectors define a common axis,
• wherein the fluid collection container can be secured on the pump module housing via a repeatedly releasable and restorable connection, wherein this connection is releasable and/or restorable by means of a rotation movement of the fluid collection container relative to the pump module housing about said axis,
• wherein fixing elements are present to fix the fluid collection container and the pump module housing relative to each other in a position for use, and wherein the fixing elements are a hollow pin with an outer thread and a recess with an inner thread for receiving the pin, wherein the hollow pin is arranged in the pump module housing and the recess is arranged in the fluid collection container, wherein the container-side suction connector is located in the recess and the pump-side suction connector is located in the pin or wherein the hollow pin is arranged in the fluid collection container and the recess is arranged in the pump module housing, wherein the pump-side suction connector is located in the recess and the container-side suction connector is located in the pin,
• wherein, by means of the rotation movement, the leaktight connection of the container-side suction connector to the pump-side suction connector is established at the same time as the fixation of the fluid collection container and the pump module housing,
• wherein the fluid collection container and the pump module housing each have at least one locking element or abutment element to ensure an exact positioning and a defined rotation of the fluid collection container relative to the pump module housing as far as an abutment, and wherein the locking elements or abutment elements of one of the connection parts includes at least one guide groove that curves along a circle and has a first locking point at an end of the at least one guide groove, and wherein the locking elements or abutment elements of the other connection part includes at least one guide block that curves along a circle of the same size and has a second locking point at an end of the at least one guide block that corresponds to a position of the first locking point to engage in operative connection with the first locking point, wherein both circles have a center point that lies on the axis.