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Pyuria: index of infection in patients with spinal cord injuries.

Little is known about the significance of pyuria in patients with spinal cord injuries. The progress in hospital of 55 such patients was studied. They were divided into 2 groups according to the method of bladder drainage on admission. Group A comprised 43 patients with indwelling catheters. Group B comprised 12 patients who were able to void with tapping, with/without compression and on intermittent catheterisation. The results showed that group A had a mean pyuria level of 185 WBC/HPF on admission. The incidence of urinary tract infection was 4 per patient during hospitalisation and the mean duration of bladder training was 82 days. Group B had a mean pyuria level of 32 WBC/HPF on admission. The incidence of urinary tract infection was 1 per patient during hospitalisation and the mean duration of bladder training was 40 days. The difference between groups A and B for all 3 parameters was statistically significant. These results suggest that patients with spinal cord injuries and indwelling catheters have a higher pyuria level and an increased risk of significant morbidity secondary to urinary tract infection, especially at the pyuria level of 100 WBC/HPF. A low pyuria level of less than or equal to 30 WBC/HPF was associated with a nil or low incidence of bacteriuria and urinary tract infection in our patients.