Indwelling catheter system

An indwelling catheter system for draining fluid from a body cavity of a subject defined by a parietal membrane and a visceral membrane, comprising:

• an indwelling catheter device (2) comprising a catheter tube (7) with a fenestrated distal end (7A) configured to reside in the cavity of the subject and a connection hub (10) disposed on a proximal end (7B) of the catheter tube and configured to fluidically couple the catheter tube with a fluid drainage system;
• a detachable ambulatory suction module (4) configured for detachable attachment to the connection hub (10) and comprising:
• a fluid inlet (19) configured for fluidic coupling to the catheter tube (7) through the connection hub (10);
• a fluid outlet (20) configured for detachable fluidic coupling to a fluid drainage system to drain pleural fluid through the detachable ambulatory suction module;
• and
• an actuable closure (25) configured to close the fluid outlet upon actuation,
• wherein the detachable ambulatory suction module is configured to exert a negative pressure in the catheter tube upon actuation of the closure;
• an external housing (11) configured for detachable attachment to the connection hub (10) and comprising a connection hub embracing housing with a through lumen (15) for receipt of the connection hub (10) to expose a proximal end (10A) of the connection hub and a base element (21) configured to abut the skin of the subject, and
• wherein the detachable suction module (4) has a recessed base (18) and the external housing (11) has an upper surface dimensioned to nest within the recessed base of the detachable suction module (4).