Vacuum chamber with snap fit plunger mechanism

A system for moving drainage liquid proximally along a drainage tube from a drainage catheter to a collection container, comprising:

• a vacuum chamber comprising:
• an input port coupleable with the drainage tube at a proximal end;
• and
• a drain port having an output tube, the output tube coupleable with the collection container;
• a drain valve in line with the drain port, the drain valve configured to transition between an open state in which fluid flow through the output tube is permitted and a closed state in which fluid flow through the output tube is prevented, wherein the drain valve comprises a plunger displaceable between a “down” position in accordance with the drain valve disposed in the open state, and an “up” position in accordance with the drain valve disposed in the closed state;
• an air pump having an input coupled with a vacuum port of the vacuum chamber;
• and
• a three-way connector comprising:
• a first port couplable with the drainage catheter;
• a second port couplable with a distal end of the drainage tube;
• and
• a third port coupled with an output of the air pump, the first port, the second port, and the third port in fluid communication with each other, wherein in use:
• activation of the air pump establishes a circulating fluid flow between the drainage tube and the vacuum chamber to move the drainage liquid proximally along the drainage tube to the vacuum chamber,
• deactivation of the air pump allows the drainage liquid to drain from the vacuum chamber into the collection container, and
• the drainage liquid is prevented from draining into the collection container only when the air pump is activated.