I
n a recent surgery, one
author of this study noted
poor urine flow after kidney
reperfusion in a liverkidney
transplant patient; however,
after straightening the urine
drainage tubing to empty the
urine that had accumulated in
the generally U-shaped dependent
loop in the Foley drainage
tube, the rate of urine outflow
from the bladder appeared to
increase. This sequence of events
raised a simple question with
clinical implications: could
potentially harmful back-pressures
sometimes exist in urine
drainage systems that are considered as passive drains that reliably
channel urine from the bladder
to the urine collection bag? At
a minimum, obstruction to urine
outflow may cause patient discomfort
and may also predispose
a patient to a catheter-associated
urinary tract infection (CAUTI).
Informal experimentation with a
commercial urine drainage system
led to the hypothesis that significant
back-pressures might
arise in clinical practice, and consequently,
to the bench experiments
described herein.
In a recent surgery, oneauthor of this study notedpoor urine flow after kidneyreperfusion in a liverkidneytransplant patient; however,after straightening the urinedrainage tubing to empty theurine that had accumulated inthe generally U-shaped dependentloop in the Foley drainagetube, the rate of urine outflowfrom the bladder appeared toincrease. This sequence of eventsraised a simple question withclinical implications: couldpotentially harmful back-pressuressometimes exist in urinedrainage systems that are considered as passive drains that reliablychannel urine from the bladderto the urine collection bag? Ata minimum, obstruction to urineoutflow may cause patient discomfortand may also predisposea patient to a catheter-associatedurinary tract infection (CAUTI).Informal experimentation with acommercial urine drainage systemled to the hypothesis that significantback-pressures mightarise in clinical practice, and consequently,to the bench experimentsdescribed herein.
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