Burr R G, Nuseibeh I
National Spinal Injuries Centre, Stoke Mandeville Hospital, Aylesbury, UK.
Br J Urol. 1995 Jul;76(1):61-5. doi: 10.1111/j.1464-410x.1995.tb07833.x.
To relate blockage of the urinary catheter to urine chemistry.
Of 44 patients (age range 19-72 years) with an indwelling urinary catheter, 21 were troubled by frequent blockage and 23 experienced no blockage. Variation in urinary pH and calcium concentration were determined during a 24 h period and related to the occurrence of blockage using discriminant analysis.
The maximum pH and calcium concentrations observed, or the maximum discriminant factors calculated, correctly discriminated 91% of patients (95% CI, 78-97%).
Attention to volume and variability of fluid intake by the patient should have a major impact on the incidence of blockage of the indwelling urinary catheter.
