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Vol. 28. Issue. 6.December 2008
Pages 572-666
Vol. 28. Issue. 6.December 2008
Pages 572-666
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Emphysematous pyelonephritis in peritoneal dialysis
Pielonefritis enfisematosa en diálisis peritoneal
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María Paz Borrajo Prola, Cristina Perez Melóna, Juan Santos Noresa, Maria Camba Caridea
a Servicio Nefrología Complexo Hospitalario de Ourense Ourense Ourense España,
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Sr director: La pielonefritis enfisematosa es una patología grave que afecta fundamentalmente a pacientes diabéticos.
To the editor: Emphysematous pyelonephritis is a serious disorder that mainly affects diabetic patients.
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To the editor: Emphysematous pyelonephritis is a serious disorder that mainly affects diabetic patients.



We present a case of torpid emphysematous pyelonephritis.



A 72-year-old patient presented with a history of chronic liver disease (of probable alcoholic origin) with occasional

edematous decompensation and several digestive bleeding episodes, colon diverticuli, pericardiectomy due to constrictive pericarditis, and chronic renal failure (of indeterminate origin) with the start of peritoneal dialysis in

2003.



The patient was admitted in October 2007 due to sepsis of urinary origin ¿ the causal microorganism being E. coli.



During admission, abdominal ultrasound showed small kidneys, with no other anomalies. Treatment was provided

in the form of amoxicillin-clavulanate for three weeks, the patient remaining at home without clinical symptoms.



In December 2007 he was admitted to the Service of Nephrology due to pain in the left inguinal region and leukocytosis (35,000). The patient was without fever, hemodynamically stable and presented no other symptoms. Exploration of the affected zone revealed no alterations other than pain in response to pressure. Empirical antibiotic treatment was started with ciprofloxacin, and emergency ultrasound of the inguinal region revealed the presence of an abscess measuring 3 cm in size. After 24 hours, the patient presented abdominal pain and turbid dialysis fluid. An emergency abdominal CAT scan was thus decided, revealing (fig. 1) a waterfluid level accumulation in the retroperitoneum and left renal fossa, and abundant gas bubbles occupying the region of the psoas muscle, which appeared atrophic. The accumulation was seen to descend between the muscles of the root of the left thigh, with an abundant presence of gas.



In view of the CAT findings, emergency surgery was decided under broad-spectrum antibiotic coverage (piperacillin-tazobactam plus metronidazole), performing a left lumbotomy and drainage of the abscess. The peritoneal dialysis catheter was removed, and the patient was kept under continuous venous-venous hemodiafiltration.



The urine and peritoneal dialysis fluid cultures proved positive for E. coli sensitive to the previously administered

antibiotic treatment.



Six days later, and in view of clinical worsening of the patient, repeat surgery was carried out to remove the left kidney and perform retroperitoneal debridement.



However, deterioration was progressive, and the patient died after 24 hours.



Emphysematous pyelonephritis is an infrequent acute disease characterized by the presence of gas within the renal

parenchyma, and presents a high percentage mortality.



The condition is generally unilateral and affects patients with known risk factors, such as diabetes mellitus or urinary tract obstruction ¿ though it has also been reported that the use of dextrose in the peritoneal dialysis fluid may be a risk factor for infections of this kind.1



In most cases the isolated germ corresponds to E. coli.2



Treatment is the subject of controversy. Percutaneous drainage should be considered initially, and particularly in

critically ill patients. With such treatment a lesser percentage mortality has been reported compared with emergency nephrectomy. However, subsequent kidney removal may prove necessary in some cases.3,4

Bibliography
[1]
1.Anwar N, Charla LS, Lew SQ. Emphysematous pyelitis presenting as an acute abdomen in an end-stage renal disease patient treated with peritoneal diálisis. J Urol. 2003 Jun; 169(6): 2422-3. [Pubmed]
[2]
2.Czaja, CA, Scholes, D, Hooton, TM, Stamm, WE. Population-based epidemiologic analysis of acute pyelonephritis. Clin Infect Dis 2007; 45:273. [Pubmed]
[3]
3.Somani BK, Nabi G, Thorpe P, Hussey J, N´dow J, ABACUS Research Group. Is Percutaneous Drainage the New Gold Standard in the Management of Emphysematous Pyelonephritis? Evidence from a Systematic Review. J. Urol. 2008 Mar 17.
[4]
Aswathaman K, Gopalakrishnan G, Gnanaraj L, Chacko NK, Kekre NS, Devasia A. Emphysematous Pyelonephritis: Outcome of Conservative Management. Urology, 2008 Mar 25.
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