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Yang S, Gill PJ, Anwar MR, Nurse K, Mahood Q, Borkhoff CM, Bijelić V, Parkin PC, Mahant S. Kidney Ultrasonography After First Febrile Urinary Tract Infection in Children: A Systematic Review and Meta-analysis. JAMA Pediatr 2023; 177:764-773. [PMID: 37252727 PMCID: PMC10230373 DOI: 10.1001/jamapediatrics.2023.1387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 04/02/2023] [Indexed: 05/31/2023]
Abstract
Importance Controversy exists on the clinical utility of kidney ultrasonography after first febrile urinary tract infection (UTI), and clinical practice guideline recommendations vary. Objective To determine the prevalence of urinary tract abnormalities detected on kidney ultrasonography after the first febrile UTI in children. Data Sources The MEDLINE, EMBASE, CINAHL, PsycINFO, and Cochrane Central Register of Controlled Trials databases were searched for articles published from January 1, 2000, to September 20, 2022. Study Selection Studies of children with first febrile UTI reporting kidney ultrasonography findings. Data Extraction and Synthesis Two reviewers independently screened titles, abstracts, and full texts for eligibility. Study characteristics and outcomes were extracted from each article. Data on the prevalence of kidney ultrasonography abnormalities were pooled using a random-effects model. Main Outcomes and Measures The primary outcome was prevalence of urinary tract abnormalities and clinically important abnormalities (those that changed clinical management) detected on kidney ultrasonography. Secondary outcomes included the urinary tract abnormalities detected, surgical intervention, health care utilization, and parent-reported outcomes. Results Twenty-nine studies were included, with a total of 9170 children. Of the 27 studies that reported participant sex, the median percentage of males was 60% (range, 11%-80%). The prevalence of abnormalities detected on renal ultrasonography was 22.1% (95% CI, 16.8-27.9; I2 = 98%; 29 studies, all ages) and 21.9% (95% CI, 14.7-30.1; I2 = 98%; 15 studies, age <24 months). The prevalence of clinically important abnormalities was 3.1% (95% CI, 0.3-8.1; I2 = 96%; 8 studies, all ages) and 4.5% (95% CI, 0.5-12.0; I2 = 97%; 5 studies, age <24 months). Study recruitment bias was associated with a higher prevalence of abnormalities. The most common findings detected were hydronephrosis, pelviectasis, and dilated ureter. Urinary tract obstruction was identified in 0.4% (95% CI, 0.1-0.8; I2 = 59%; 12 studies), and surgical intervention occurred in 1.4% (95% CI, 0.5-2.7; I2 = 85%; 13 studies). One study reported health care utilization. No study reported parent-reported outcomes. Conclusions and Relevance Results suggest that 1 in 4 to 5 children with first febrile UTI will have a urinary tract abnormality detected on kidney ultrasonography and 1 in 32 will have an abnormality that changes clinical management. Given the considerable study heterogeneity and lack of comprehensive outcome measurement, well-designed prospective longitudinal studies are needed to fully evaluate the clinical utility of kidney ultrasonography after first febrile UTI.
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Affiliation(s)
- Sarah Yang
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Peter J. Gill
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Mohammed Rashidul Anwar
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Kimberly Nurse
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Quenby Mahood
- The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Cornelia M. Borkhoff
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Vid Bijelić
- Children’s Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
| | - Patricia C. Parkin
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Sanjay Mahant
- Child Health Evaluative Sciences, SickKids Research Institute, Toronto, Ontario, Canada
- The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
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Simrén Y, Valdimarsson S, Stokland E, Lagerstrand KM, Sixt R, Hansson S. Renal swelling indicates renal damage in infants with their first urinary tract infection. Acta Paediatr 2018; 107:2004-2010. [PMID: 29972698 DOI: 10.1111/apa.14489] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 05/21/2018] [Accepted: 07/02/2018] [Indexed: 11/29/2022]
Abstract
AIM We used ultrasound to evaluate renal swelling as a predictor of acute and permanent renal damage in infants with their first urinary tract infection (UTI). METHODS The cohort at the Queen Silvia Children's Hospital, Gothenburg, Sweden, comprised 101 infants with their first UTI at a mean age of 3.9 ± 3.0 months. Acute and follow-up ultrasounds were carried out a few days and one month after treatment started, and a 99m technetium dimercaptosuccinic acid (DMSA) scan was carried out after one month and after a year if the first scan was abnormal. RESULTS The acute ultrasounds showed that renal length and volume, calculated as standard deviation scores (SDS), were 1.39 ± 1.43 SDS and 1.30 ± 1.08 SDS. We found that 52% of the one-month DMSA scans and 25% of the one-year DMSA scans were abnormal. Renal length (p = 0.0026) and initial volume (p = 0.0005) on the ultrasound predicted acute renal damage at the one-month DMSA scan and initial renal length (p = 0.030) predicted permanent renal damage at the one-year DMSA scan. CONCLUSION Renal swelling was associated with renal damage. Although the diagnostic performance compared with the DMSA scan was weak, renal swelling may help clinicians to make decisions about further investigations and follow-ups of infants with UTIs.
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Affiliation(s)
- Y Simrén
- Department of Radiology; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - S Valdimarsson
- Department of Paediatrics; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - E Stokland
- Department of Radiology; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - K M Lagerstrand
- Department of Radiation Physics; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - R Sixt
- Department of Paediatric Clinical Physiology; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - S Hansson
- Department of Paediatrics; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
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Anigilaje EA. A Putative Role of Apolipoprotein L1 Polymorphism in Renal Parenchymal Scarring Following Febrile Urinary Tract Infection in Nigerian Under-Five Children: Proposal for a Case-Control Association Study. JMIR Res Protoc 2018; 7:e156. [PMID: 29903699 PMCID: PMC6024104 DOI: 10.2196/resprot.9514] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 03/23/2018] [Accepted: 04/10/2018] [Indexed: 01/13/2023] Open
Abstract
Background Although urinary tract infection (UTI) resolves with prompt treatment in a majority of children, some children, especially those aged less than 5 years, also develop renal parenchymal scarring (RPS). RPS causes high blood pressure that may lead to severe chronic kidney disease and end-stage renal disease (ESRD). Although the risk of UTI is higher in white children than in black children, it is unknown whether RPS is more common in white children than in black children as data are scarce in this regard. A common genetic predisposition to kidney disease in African Americans and the sub-Saharan African blacks is the possession of apolipoprotein L1 (APOL1). APOL1 risk variants regulate the production of APOL1. APOL1 circulates in the blood, and it is also found in the kidney tissue. While circulating, APOL1 kills the trypanosome parasites; an increased APOL1 in kidney tissues, under the right environmental conditions, can also result in the death of kidney tissue (vascular endothelium, the podocytes, proximal tubules, and arterial cells), which, ultimately, is replaced by fibrous tissue. APOL1 may influence the development of RPS, as evidence affirms that its expression is increased in kidney tissue following UTI caused by bacteria. Thus, UTI may be a putative environmental risk factor responsible for APOL1-induced kidney injury. Objective The aim of this proposal was to outline a study that seeks to determine if the possession of two copies of either G1 or G2 APOL1 variant increases the risk of having RPS, 6 months following a febrile UTI among Nigerian under-five children. Methods This case-control association study seeks to determine whether the risk of RPS from febrile UTI is conditional on having 2 APOL1 risk alleles (either G1 or G2). Cases will be children with a confirmed RPS following a febrile UTI. Controls will be age-, gender-, and ethnic-matched children with a febrile UTI but without RPS. Children with vesicoureteral reflux and other congenital anomalies of the urinary tract are to be excluded. Association between predictor variables (ethnicity, APOL1 G1 or G2, and others) and RPS will be tested at bivariate logistic regression analyses. Predictors that attained significance at a P value of ˂.05 will be considered for multiple logistic regressions. Likelihood-based tests will be used for hypothesis testing. Estimation will be done for the effect size for each of the APOL1 haplotypes using a generalized linear model. Results The study is expected to last for 3 years. Conclusions The study is contingent on having a platform for undergoing a research-based PhD program in any willing university in Europe or elsewhere. The findings of this study will be used to improve the care of African children who may develop RPS following febrile UTI. Registered Report Identifier RR1-10.2196/9514
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Affiliation(s)
- Emmanuel Ademola Anigilaje
- Nephrology Unit, Department of Paediatrics, College of Health Sciences, University of Abuja, Abuja, Nigeria
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Simrén Y, Stokland E, Lagerstrand KM, Valdimarsson S, Hansson S. Ultrasound is an effective and noninvasive method of evaluating renal swelling in infants with their first urinary tract infection. Acta Paediatr 2017; 106:1868-1874. [PMID: 28349603 DOI: 10.1111/apa.13849] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/21/2017] [Accepted: 03/24/2017] [Indexed: 11/27/2022]
Abstract
AIM This study evaluated renal swelling in infants with a first urinary tract infection (UTI) by correlating renal length and volume with C-reactive protein (CRP) and body temperature. METHODS Ultrasounds were carried out on 104 infants at The Queen Silvia Children's Hospital, Gothenburg, Sweden - 58 boys (mean age 3.3 months) and 46 girls (mean age 4.8 months) - during the acute phase of their UTI. A second scan was performed on 94 of them 4 weeks later. Renal length and volume were computed to standard deviation scores (SDS). RESULTS The mean renal length and volume at the first ultrasound were 1.90 SDS (±1.54) and 1.67 SDS (±1.13) for the larger kidney and 0.86 SDS (±1.01) and 0.84 SDS (±0.90) for the smaller kidney. There was a significant decrease in renal length and volume between the two ultrasounds, with a mean difference of 0.96 SDS (±1.24) and 1.07 SDS (±1.10) for the larger kidney (p < 0.0001). The length and volume of the larger kidney correlated with CRP (p < 0.001), but only the renal length correlated with fever (p < 0.001). CONCLUSION Early ultrasound determined renal swelling in infants with a UTI and may be a valuable noninvasive way of identifying infants with renal parenchymal involvement.
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Affiliation(s)
- Y Simrén
- Department of Radiology, Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - E Stokland
- Department of Radiology, Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - K M Lagerstrand
- Department of Radiation Physics, Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - S Valdimarsson
- Department of Paediatrics; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
| | - S Hansson
- Department of Paediatrics; Institute of Clinical Sciences at Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
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Shaikh N, Spingarn RB, Hum SW. Dimercaptosuccinic acid scan or ultrasound in screening for vesicoureteral reflux among children with urinary tract infections. Cochrane Database Syst Rev 2016; 7:CD010657. [PMID: 27378557 PMCID: PMC6457894 DOI: 10.1002/14651858.cd010657.pub2] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND There is considerable interest in detecting vesicoureteral reflux (VUR) because its presence, especially when severe, has been linked to an increased risk of urinary tract infections and renal scarring. Voiding cystourethrography (VCUG), also known as micturating cystourethrography, is the gold standard for the diagnosis of VUR, and the grading of its severity. Because VCUG requires bladder catheterisation and exposes children to radiation, there has been a growing interest in other screening strategies that could identify at-risk children without the risks and discomfort associated with VCUG. OBJECTIVES The objective of this review is to evaluate the accuracy of two alternative imaging tests - the dimercaptosuccinic acid renal scan (DMSA) and renal-bladder ultrasound (RBUS) - in diagnosing VUR and high-grade VUR (Grade III-V VUR). SEARCH METHODS We searched MEDLINE, EMBASE, BIOSIS, and the Cochrane Register of Diagnostic Test Accuracy Studies from 1985 to 31 March 2016. The reference lists of relevant review articles were searched to identify additional studies not found through the electronic search. SELECTION CRITERIA We considered published cross-sectional or cohort studies that compared the results of the index tests (DMSA scan or RBUS) with the results of radiographic VCUG in children less than 19 years of age with a culture-confirmed urinary tract infection. DATA COLLECTION AND ANALYSIS Two authors independently applied the selection criteria to all citations and independently abstracted data. We used the bivariate model to calculate summary sensitivity and specificity values. MAIN RESULTS A total of 42 studies met our inclusion criteria. Twenty studies reported data on the test performance of RBUS in detecting VUR; the summary sensitivity and specificity estimates were 0.44 (95% CI 0.34 to 0.54) and 0.78 (95% CI 0.68 to 0.86), respectively. A total of 11 studies reported data on the test performance of RBUS in detecting high-grade VUR; the summary sensitivity and specificity estimates were 0.59 (95% CI 0.45 to 0.72) and 0.79 (95% CI 0.65 to 0.87), respectively. A total of 19 studies reported data on the test performance of DMSA in detecting VUR; the summary sensitivity and specificity estimates were 0.75 (95% CI 0.67 to 0.81) and 0.48 (95% CI 0.38 to 0.57), respectively. A total of 10 studies reported data on the accuracy of DMSA in detecting high-grade VUR. The summary sensitivity and specificity estimates were 0.93 (95% CI 0.77 to 0.98) and 0.44 (95% CI 0.33 to 0.56), respectively. AUTHORS' CONCLUSIONS Neither the renal ultrasound nor the DMSA scan is accurate enough to detect VUR (of all grades). Although a child with a negative DMSA test has an < 1% probability of having high-grade VUR, performing a screening DMSA will result in a large number of children falsely labelled as being at risk for high-grade VUR. Accordingly, the usefulness of the DMSA as a screening test for high-grade VUR should be questioned.
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Affiliation(s)
- Nader Shaikh
- Children's Hospital of PittsburghGeneral Academic Pediatrics3414 Fifth Ave, Suite 301PittsburghPAUSA15213
| | - Russell B Spingarn
- University of Pittsburgh School of Medicine3550 Terrace StreetPittsburghPAUSA15261
| | - Stephanie W Hum
- Children's Hospital of PittsburghGeneral Academic Pediatrics3414 Fifth Ave, Suite 301PittsburghPAUSA15213
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Role of Renal Ultrasonography in Predicting Vesicoureteral Reflux and Renal Scarring in Children Hospitalized with a First Febrile Urinary Tract Infection. Pediatr Neonatol 2016; 57:113-9. [PMID: 26163341 DOI: 10.1016/j.pedneo.2015.06.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 05/21/2015] [Accepted: 06/05/2015] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND This study was designed to examine the capability of renal ultrasonography (US) for predicting vesicoureteral reflux (VUR) and renal scarring (RS), and to assess, using initial US, the significant urologic abnormalities that impact on management of children hospitalized with a first febrile urinary tract infection (UTI). METHODS Hospitalized children aged ≤ 2 years with a first febrile UTI were prospectively evaluated using imaging studies, including (99m)Tc dimercaptosuccinic acid (DMSA) scan, US, and voiding cystourethrography. RESULTS Of the 310 children analyzed (195 boys and 115 girls), 105 (33.9%) had abnormal US. Acute DMSA scans were abnormal in 194 children (62.6%), including 89 (45.9%) with concomitant abnormal US. There was VUR in 107 children (34.5%), including 79 (25.5%) with Grades III-V VUR. The sensitivity and negative predictive values of US were 52.3% and 75.1%, respectively, for Grades I-V VUR and 68.4% and 87.8%, respectively, for Grades III-V VUR. Eighty-five children (27.4%) had RS, including 55 (64.7%) with abnormal US. Of the 105 children with abnormal US, 33 (31.4%) needed subsequent management (surgical intervention, parental counseling, or follow up of renal function). Nephromegaly on initial US and Grades III-V VUR were risk factors of RS. CONCLUSION Abnormal US may carry a higher probability of Grades III-V VUR and RS, and can affect subsequent management in a significant number of children. Nephromegaly on initial US and Grades III-V VUR are strongly associated with an increased risk for RS. Thus, US should be performed on children after a first febrile UTI and children with normal US may not require voiding cystourethrography.
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Abstract
In infants and young children, urinary tract infections (UTI) often present with unspecific symptoms. Appropriate techniques of urine sampling play an important role for accurate microbiological diagnosis. In infants urine sampling by bladder puncture or transurethral catheter is recommended. In young infants with suspected pyelonephritis, calculated antibiotic treatment should be initiated parenterally with a combination of a third generation cephalosporin or an aminoglycoside with ampicillin. After the age of 3-6 months group 3 oral cephalosporins can be used in uncomplicated pyelonephritis. With the first febrile UTI early sonography is recommended to provide information about renal parenchymal involvement and to exclude malformations of the kidneys and urinary tract. Strategies for the recognition of vesicoureteral reflux and renal damage are under discussion. Recently published guidelines by the American Academy of Pediatrics for the diagnosis and management of UTI in febrile children and infants aged 2-24 months will most likely influence the still pending German guidelines.
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Affiliation(s)
- R Beetz
- Zentrum für Kinder- und Jugendmedizin, Universitätsmedizin Mainz, Johannes Gutenberg- Universität, Mainz.
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