Urinary catheter with retention features

A urinary catheter comprising:

• (a) a tube having (i) a wall with an outer surface, the outer surface having a first cross-sectional area, (ii) a lumen, (iii) a distal end with one or more openings in communication with the lumen, and (iv) a proximal end with an opening in communication with the lumen;
• (b) a valve that is operated to be in (i) a closed configuration, wherein fluid does not flow out of the proximal end, or (ii) an open configuration in which fluid does flow out of the proximal end;
• and
• (c) a retainer between the distal end and the proximal end, the retainer being attached to the tube and including an outwardly-extending flap, wherein the retainer has a first, compressed position in which it is pressed against and/or around the outer surface of the tube and is configured to fit through the penile urethra, and a second, extended position in which it extends outward from the tube by a distance of one to four times the outer diameter of the tube and is configured to not fit through the penile urethra,
• wherein the outwardly-extending flap comprises a center portion extending from the tube, wherein the center portion comprises an axial length between about 25 mm and about 35 mm in a first direction defined from the distal end to the proximal end, a second length in a second direction orthogonal to the first direction and extending from an outer wall of the tube, and a center portion thickness in a third direction orthogonal to the first direction and the second direction, and
• wherein the second length is about 40% to about 800% of a diameter of the tube, wherein the outwardly-extending flap further comprises an outermost edge extending from the center portion in the second direction, wherein the outermost edge comprises a bulb with a bulb thickness in the third direction greater than the center portion thickness.