Systems and methods for removal of urine
The present invention provides an arrangement ( 200 ) adapted for enhanced continuous flow of urine in a catheterized patient, the arrangement comprising a catheter tube ( 204 ) having an inner diameter of less than six millimeters, said tube having an inner surface which is hydrophobic at least along a first segment thereof and being adapted to provide a continuously negative fluid pressure therein.
1. A catheter tube with two ends, adapted for connecting to a catheter at a first end and to a urine collection bag at a second end, wherein said catheter tube comprises a tube having an inner diameter of less than six millimeters, said tube having an inner surface which is hydrophobic and polished along at least a first segment of said tube, such that said tube conveys a column of fluid held by a meniscus of said column of fluid from said catheter to said collection bag without interruption by eliminating substantially all air traps in said tube during operation, wherein said tube comprises an ascending portion having a first vertical height and a descending portion having a second vertical height, and a difference between said first vertical height and said second vertical height is less than 60 millimeters.
2. The catheter tube of claim 1 , wherein said tube is adapted to provide a continuously negative fluid pressure within said tube.
3. The catheter tube of claim 2 , wherein said tube is disposed to provide a continuously negative fluid pressure representing less than 50-centimeter water.
4. The catheter tube of claim 3 , wherein said tube is disposed to provide a continuously negative fluid pressure representing between 10-centimeter to 40 centimeter water.
5. The catheter tube of claim 4 , wherein said tube is disposed to provide a continuously negative fluid pressure representing between 25-centimeter to 40-centimeter water.
6. The catheter tube of claim 1 , wherein said tube has an inner surface which is hydrophobic at least along a first half of the length of said tube.
7. The catheter tube of claim 6 , wherein said tube has an inner diameter of from four millimeters to five millimeters.
8. The catheter tube of claim 1 , wherein said tube is adapted for onetime, on-way non-releasable attachment to said catheter.
9. The catheter tube of claim 1 , wherein said tube is adapted for non-releasable attachment to said urine collection bag.
10. The catheter tube of claim 1 , wherein said tube is non-releasably attached to said urine collection bag.
11. The catheter tube of claim 1 , wherein said tube is non-releasably attached to said catheter.
12. The catheter tube of claim 2 , wherein said tube includes a hydrophobic material including at least one of a thermoplastic elastomeric material, a thermoplastic material, a curable elastomeric material, a polyamide resin, and an elastomer.
13. The catheter tube of claim 12 , wherein said hydrophobic material is selected from at least one of: polypropylene (PP), polyvinyl chloride (PVC), polyurethane (PU), polyethylene (PE), EVA, latex, and Kraton™ polymer.
14. The catheter tube of claim 2 , wherein said inner surface is hydrophobic such that said tube is adapted to remain full of urine during use.
15. The catheter tube of claim 1 , wherein said tube is disposed to provide a down-comer portion proximal to said first end and a riser portion proximal to said second end.
16. The catheter tube of claim 15 , wherein said tube has an inner surface which is hydrophobic at least along said down-comer portion.
17. The catheter tube of claim 16 , wherein said tube is configured for providing a continuous head of fluid from the patient to the down-comer portion of the tube.
18. The catheter tube of claim 17 , wherein a negative height difference between said second end and said patient is arranged to provide said continuously negative fluid pressure representing up to 50-centimeter water.
19. The catheter tube of claim 1 , wherein said arrangement is adapted to continuously remove liquid from said patient.
20. A method of collecting urine from a patient having a catheter inserted into a urinary bladder, the method comprising providing a tube with two ends, adapted for connecting to a catheter at a first end and to a urine collection bag at a second end, an inner diameter of said tube being less than six millimeters, an inner surface of said tube being hydrophobic and polished along at least a first segment thereof, such that said tube conveys a column of fluid held by a meniscus of said column of fluid from said catheter to said collection bag without generating an air trap in said tube during operation; wherein said tube comprises an ascending portion having a first vertical height and a descending portion having a second vertical height, wherein a difference between said first vertical height and said second vertical height is less than 60 millimeter; connecting said tube to said catheter at one end and connecting said tube to said urine collection bag at an opposite end; and continuously draining said bladder.
21. The method of claim 20 , wherein said connecting said tube comprises non-releasably attaching said hydrophobic tube to said urinary catheter unit, and releasably attaching said tube to said urine collection bag; further comprising conveying said column of fluid held by said meniscus of said column of fluid from said catheter to said collection bag without interruption, without manual manipulation of said tube or said collection bag.