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. 1996 Sep;101(3):277-80.
doi: 10.1016/S0002-9343(96)00173-8.

Fever duration in hospitalized acute pyelonephritis patients

M A Behr  1 , R Drummond, M D Libman, J S Delaney, J S Dylewski
Affiliations

Fever duration in hospitalized acute pyelonephritis patients

M A Behr et al. Am J Med. 1996 Sep.

Abstract

Purpose: To study persistence of fever in treated pyelonephritis with respect to guidelines recommending investigation and modification of therapy after 2 to 3 days of fever.

Patients and methods: A retrospective chart review was made of 70 patients hospitalized for febrile pyelonephritis at a community hospital in Canada.

Results: Median duration of fever was 34 hours; persistence of fever at 48 and 72 hours was 26% and 13%, respectively. No patients had complications such as intrarenal or perirenal abscess. Prolonged fever was independently associated with increasing baseline creatinine (P = 0.0001), younger age (P = 0.027), and increasing total leukocyte count (P = 0.026). Results of ultrasonography and intravenous urograms were not predictors of fever duration.

Conclusion: Fever in treated pyelonephritis can take 4 days to resolve, and routine urologic investigation after 2 to 3 days of fever may be unwarranted.

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