Risk factors in the development of early technetium-99m dimercaptosuccinic acid renal scintigraphy lesions during first urinary tract infection in children.
OBJECTIVE
To establish the variables that correlate with uptake defects in dimercaptosuccinic acid (DMSA) scintigraphy performed in the acute phase of a first episode of urinary tract infection (UTI).


METHODS
A prospective observational study was conducted in a cohort of 158 consecutive children with a first episode of symptomatic UTI. The therapeutic delay time (TDT) was recorded. DMSA scintigraphy was performed in all children and voiding cystourethrography in 150 of them.


RESULTS
85% of the patients were younger than 2 y. Mean TDT was 33.5 h. The aetiological agent was Escherichia coli in 140 children. DMSA scintigraphy was normal in 81. Vesicoureteric reflux was detected in 33. After a multivariate logistic regression analysis the following variables were retained in the final model: TDT > or = 48 h, growth of bacteria other than E. coli, percentage of polymorphonuclear cells > or = 60% and C-reactive protein > or = 30 mg l(-1).


CONCLUSIONS
TDT > or = 48 h, bacteria other than E. coli, percentage of polymorphonuclear cells > or = 60% and CRP > or = 30 mg l(-1) influence the findings detected in the DMSA scintigraphy performed in the acute phase of a first episode of UTI.
Fernández-Menéndez
J M
JM
Servicio de Pediatría, Hospital de Cabueñes, Gijón, Spain. jfernandezm@hcab.insalud.es
Málaga
S
S
Matesanz
J L
JL
Solís
G
G
Alonso
S
S
Pérez-Méndez
C
C
D000208:Acute Disease; D015331:Cohort Studies; D004927:Escherichia coli Infections / Q000150:complications; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D011237:Predictive Value of Tests; D011446:Prospective Studies; D019275:Radiopharmaceuticals / Q000009:adverse effects*; D012307:Risk Factors; D019783:Technetium Tc 99m Dimercaptosuccinic Acid / Q000009:adverse effects*; D013997:Time Factors; D014055:Tomography, Emission-Computed; D014552:Urinary Tract Infections / Q000175:diagnosis* / Q000382:microbiology; D014718:Vesico-Ureteral Reflux / Q000139:chemically induced*
D019275:Radiopharmaceuticals; D019783:Technetium Tc 99m Dimercaptosuccinic Acid