Urinary catheter with retention features
A urinary catheter can be retained inside the body for extended periods. A catheter mating device can connect to the catheter to move the catheter inside of the body or remove it from the body. The catheter includes: (1) a tube having a lumen and an outer surface, (2) a retainer that may have an attachment portion attached to the tube and a flap or handle-shaped structure attached to the attachment portion, wherein the retainer has a first, contracted position and a second, extended position, and (3) an bladder retention structure at the catheter's distal end, wherein the bladder retention portion may comprise a flap or a handle-shaped portion and that has a first, compressed position and a second, extended position. The retainer and/or bladder retention structure each are configured to retain the catheter in the proper position inside of a user's body.
1 . 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.
2 . The urinary catheter of claim 1 , wherein the center portion thickness is the same as or greater than a thickness of the tube wall.
3 . The urinary catheter of claim 2 , wherein the center portion thickness is 0.75 mm to 1.0 mm.
4 . The urinary catheter of claim 2 , wherein the retainer further comprises a first, rounded corner between a first side of the center portion and an outermost edge and a second, rounded corner between a second side of the center portion and the outermost edge.
5 . The urinary catheter of claim 1 , wherein the bulb thickness is 10% to 100% greater than the center portion thickness.
6 . The urinary catheter of claim 1 , wherein the retainer has a hardness of an amount from: 1 to 70 Shore A, 5-15 Shore A, 10-20 Shore A, 5-15 Shore A, or 10-15 Shore A.
7 . The urinary catheter of claim 1 , wherein the retainer is comprised of silicone rubber.
8 . The urinary catheter of claim 1 , wherein the retainer can be moved from its first, extended position to its second, compressed position when subjected to a compressive force of an amount from 0.5-2.5 lbs.
9 . The urinary catheter of claim 1 , wherein the second length and the diameter of the tube is about 15 mm to about 25 mm, and wherein the center portion thickness is between about 0.75 mm and about 1.0 mm.
10 . The urinary catheter of claim 9 , 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 10% to 100% greater than the center portion thickness.
11 . The urinary catheter of claim 10 , wherein the bladder retention structure has a thickness that is from equal to, to four times greater than, a thickness of the tube wall.
12 . The urinary catheter of claim 1 that further includes one or more sensors on or in the catheter and that is configured such that the one or more sensors are positioned in a bladder when the urinary catheter is positioned in a lower urinary tract of a human.
13 . The urinary catheter of claim 1 , further comprising a bladder retention structure, wherein the bladder retention structure comprises an attachment portion attached to the tube, wherein the attachment portion has a distal side and a proximal side, a first leg connected to the distal side of the attachment portion, a second leg connected to the proximal side of the attachment portion, a center portion connected to the first leg and to the second leg opposite the attachment portion, wherein the bladder retention structure is configured to have a second, extended position in which the center portion extends outward from the attachment portion by a distance of 2-5 times the width of the tube.
14 . The urinary catheter of claim 13 , wherein the first leg of the bladder retention structure is curved backwards from where it is connected to the attachment structure.
15 . The urinary catheter of claim 13 , wherein the second leg of the bladder retention structure is curved backwards from where it is connected to the attachment structure.
16 . The urinary catheter of claim 13 , wherein the center portion of the bladder retention structure has an intermediate section that is straight.
17 . The urinary catheter of claim 1 that further comprises a bladder retention structure on the distal end, wherein the bladder retention structure has a second, compressed position in which it is positioned against and/or around the outer surface of the tube, and a first, extended position in which it extends outward from the outer wall of the tube.
18 . The urinary catheter of claim 1 , wherein the distal tip is bullet shaped and has a hardness that is greater than the harness of the tube wall.
19 . The urinary catheter of any of claim 1 , wherein the distal tip has a conical first portion that tapers from a diameter equal to a diameter of the tube wall to a rounded end portion.