Urinary catheterization assembly with vented sheath
A urinary catheter assembly is disclosed having a catheter, a sheath enclosing an insertable portion of the catheter, and one or more vents in fluid communication with the lumen of the sheath and an environment outside the sheath.
1. A urinary catheter assembly comprising:
a catheter comprising a first end having a urine inlet, a second end having a urine outlet, and a urethra-insertable portion;
a pliable sheath comprising a lumen, wherein the sheath encloses all or a portion of the insertable portion;
one or more vents in fluid communication with the lumen and an environment outside the lumen; and
an insertion stop location, wherein the pliable sheath further comprises a terminus coupled to the catheter at a location between the insertion stop location and the second end, the one or more vents present at one or more locations including through a collar formed in the terminus and through the pliable sheath, such that air escapes from the one or more vents as the catheter is inserted and the pliable sheath is gathered, wherein the one or more vents through the collar are passages extending through the structure of the collar, equally spaced about the collar.
2. The catheter assembly of claim 1 , further comprising an introducer attached to the sheath opposite the terminus, the introducer and the sheath together enclosing all of the urethra-insertable portion.
3. The catheter assembly of claim 1 , further comprising a non-insertable portion, wherein at least part of the non-insertable portion comprises an uncovered region of the catheter outside the sheath.
4. The catheter assembly of claim 1 , wherein the terminus sealingly engages the catheter at an attachment point disposed between the insertion stop location and the second end.
5. The catheter assembly of claim 4 , wherein the distance along the catheter from the attachment point to the second end is no more than about one-third of the total length of the catheter from the first end to the second end.
6. The catheter assembly of claim 1 wherein the sheath terminus slidingly engages the catheter.
7. The catheter assembly of claim 1 , wherein the one or more vents comprise holes.
8. The catheter assembly of claim 1 , wherein the one or more vents comprise slits.
9. The catheter assembly of claim 1 , wherein the one or more vents comprise an array of apertures.
10. The catheter assembly of claim 1 , further comprising a mid-point located substantially half way between the first end and the second end, wherein the one or more vents are located between the mid-point and the second end.
11. The catheter assembly of claim 1 , wherein the portion of the sheath between the first end and the mid-point is substantially free of vents.
12. The catheter assembly of claim 1 , wherein each of the one or more vents are located adjacent the terminus.
13. The catheter assembly of claim 1 further comprising a urine receptacle coupled to the non-insertable portion of the catheter.
14. The catheter assembly of claim 1 further comprising a urine receptacle removably coupled to the non-insertable portion of the catheter, wherein the urine receptacle includes a receptacle lumen in fluid communication with the at least one vent.
15. The catheter assembly of claim 1 , wherein the one or more vents are adapted to allow a gaseous phase to pass between the lumen and the environment outside the lumen, and adapted to prevent passage of a liquid phase between the lumen and the environment outside the lumen.