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Logo of bmcurolBioMed Centralsearchsubmit a manuscriptregisterthis articleBMC Urology
BMC Urol. 2012; 12: 4.
Published online Mar 13, 2012. doi:  10.1186/1471-2490-12-4
PMCID: PMC3353222
Clinical characteristics and risk factors for septic shock in patients receiving emergency drainage for acute pyelonephritis with upper urinary tract calculi
Yoshiyuki Yamamoto,1 Kazutoshi Fujita,corresponding author1 Shigeaki Nakazawa,1 Takuji Hayashi,1 Go Tanigawa,1 Ryoichi Imamura,1 Masahiro Hosomi,1 Daiki Wada,2 Satoshi Fujimi,2 and Seiji Yamaguchi1
1Department of Urology, Osaka General Medical Center, Osaka, Japan
2Department of Emergency, Osaka General Medical Center, Osaka, Japan
corresponding authorCorresponding author.
Yoshiyuki Yamamoto: yoshiyuki229/at/; Kazutoshi Fujita: kazufujita2/at/; Shigeaki Nakazawa: shigeakinakazawa2007/at/; Takuji Hayashi: takujihayashi0929/at/; Go Tanigawa: tg0919/at/; Ryoichi Imamura: imamura.ryoichi/at/; Masahiro Hosomi: hosomim/at/; Daiki Wada: dk0116-w/at/; Satoshi Fujimi: fujimis/at/; Seiji Yamaguchi: syamaguchi/at/
Received September 3, 2011; Accepted March 13, 2012.
Acute pyelonephritis (APN) is a common complication of ureteral obstruction caused by urolithiasis, and it can be lethal if it progresses to septic shock. We investigated the clinical characteristics of patients undergoing emergency drainage and assessed risk factors for septic shock.
A retrospective study was performed of 98 patients (101 events) requiring emergency drainage at our urology department for obstructive APN associated with upper urinary tract calculi from January 2003 to January 2011. Clinical characteristics were summarized, and risk factors for septic shock were assessed by logistic regression analysis.
Objective evidence of sepsis was found in 64 (63.4%) events, and 21 events (20.8%) were categorized as septic shock. Ninety-six patients recovered, but 2 patients died of septic shock. Multivariate analysis revealed that age and the presence of paralysis were independent risk factors for septic shock.
APN associated with upper urinary tract calculi is a severe disease that should be treated with caution, particularly when risk factors are present.
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