Urinary catheter for controlled drainage

A urinary catheter for insertion into the urethra comprising:

• a catheter shaft with an outer surface and an internal lumen, extending between a distal discharge opening and at least one proximal drainage opening, arranged at or in the vicinity of a proximal tip of the catheter shaft;
• an overcoat layer encircling at least a portion of said catheter shaft and extending substantially along said catheter shaft, thereby forming a closed deformable fluid filled cavity intermediate said overcoat layer and said outer surface, said fluid filled cavity having a proximal end and a distal end, wherein said overcoat layer is elastically deformable to allow for movement of said fluid within said cavity during deployment, wherein the fluid filled cavity is arranged to deform upon insertion of said catheter shaft into the urethra, whereby at least a portion of said fluid filled cavity at said proximal end is arranged to be compressed to a smaller diameter, and upon continued insertion of said catheter shaft through the urethra into at least the bladder neck, at least said portion of said fluid filled cavity at said proximal end being arranged to expand back toward a greater diameter, as the fluid of said fluid filled cavity at said distal end is caused to flow toward the proximal end of the fluid filled cavity;
• a valve arranged to set the internal lumen of the catheter shaft in an open or closed state;
• and
• a valve handle or actuator arranged to bring the valve to an opened state upon activation.