• R S Israel, S R Lowenstein, J A Marx, J Koziol-McLain, L Svoboda, and S Ranniger.
• Department of Emergency Medicine, Wilford Hall USAF Medical Center, San Antonio, Texas 78236.
• Ann Emerg Med. 1991 Mar 1; 20 (3): 253-7.

Study ObjectivesTo determine whether moderately to severely ill patients with acute pyelonephritis can be treated successfully on an outpatient basis, and whether any aspect of history, physical examination, or initial laboratory data predicts failure of outpatient therapy and the need for hospitalization.DesignRetrospective chart review of all patients with a diagnosis of acute pyelonephritis seen during a three-year period.SettingEmergency department observation unit of an urban teaching hospital serving residents of the city and county of Denver.Type Of ParticipantsWomen between the ages of 15 and 50 with symptoms, physical examination, and initial laboratory data consistent with a diagnosis of pyelonephritis.InterventionsPatients received IV antibiotics, rehydration, analgesics, and antiemetics in an observation unit for up to 12 hours, when they were either admitted to the hospital or discharged home on oral antibiotics.Measurements And Main ResultsSixty-three of 87 patients (72%) with acute pyelonephritis were managed successfully as outpatients, nine (22%) were hospitalized directly from the observation unit because they were considered to be too ill to go home, and five (6%) returned with persistent symptoms after ED therapy and were hospitalized. No clinical or laboratory variable predicted success or failure of ED observation unit therapy at the time of initial presentation.ConclusionIn selected patients, the observation unit may be used to initiate therapy for acute pyelonephritis. Those with an adequate clinical response to initial treatment may be discharged on oral antibiotic therapy with appropriate follow-up.

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