Two-Step Process for ED UTI Screening in Febrile Young Children: Reducing Catheterization Rates

Urinary Tract Infections in Children

Despite the American Academy of Pediatrics guidelines for the evaluation, treatment, and management of urinary tract infections (UTIs), UTI diagnosis and management remains challenging for clinicians. Challenges with acute UTI management stem from vague presenting signs and symptoms, diagnostic uncertainty, limitations in laboratory testing, and selecting appropriate antibiotic therapy in an era with increasing rates of antibiotic-resistant uropathogens. Recurrent UTI management remains difficult due to an incomplete understanding of the factors contributing to UTI, when to assess a child with repeated infections for kidney and urinary tract anomalies, and limited prevention strategies. To help reduce these uncertainties, this review provides a comprehensive overview of UTI epidemiology, risk factors, diagnosis, treatment, and prevention strategies that may help pediatricians overcome the challenges associated with acute and recurrent UTI management.

Fever in infants ages 8 to 60 days: An updated guideline for evaluation

ABSTRACT

Fever in infants under age 60 days is a leading cause of ED, urgent care, and primary care visits. Most infants present as well-appearing, and guidelines for the workup and appropriate management of these children have varied over the decades. Additionally, testing availability, accuracy, and changing bacterial prevalence patterns have rendered many guidelines obsolete. An updated guideline from the American Academy of Pediatrics provides a foundation for clinician evaluation of patients in this vulnerable age group.

Clinical Course of Children 1 to 24 Months Old With Positive Urine Cultures Without Pyuria

OBJECTIVE

To describe the clinical course of children with positive urine cultures without pyuria who were not given antibiotics initially, identify predictors of subsequent antibiotic treatment, and evaluate the association between subsequent treatment and urinary tract infection (UTI) within 30 days.

METHODS

We conducted a multicenter retrospective cohort study of children 1 to 24 months old who had positive urine cultures without pyuria and who were not started on antibiotics upon presentation to 3 health care systems from 2010 to 2021. Outcomes included clinical status at the time urine cultures resulted, escalation of care (emergency department visit or hospitalization) and subsequent antibiotic treatment within 7 days, and subsequent UTI within 30 days of presentation.

RESULTS

Of 202 included children, 61% were female and median age was 9 months. Of 151 patients with clinical status information when cultures resulted, 107 (70.8%, 95% confidence interval [CI] 62.9-77.9%) were improved. Two of 202 children (1.0%, 95% CI 0.2-4.0%) experienced care escalation. Antibiotics were started in 142 (82.2%) children, and treatment was associated with prior UTI (risk ratio [RR] 1.20, 95% CI 1.15-1.26) and lack of improvement (RR 1.22, 95% CI 1.13-1.33). Subsequent UTI was diagnosed in 2 of 164 (1.2%, 95% CI 0.1-4.3%) treated and 0 of 36 (0%, 95% CI 0-9.7%) untreated children.

CONCLUSIONS

Seventy percent of children with positive urine cultures without pyuria improved before starting antibiotics; however, >80% were ultimately treated. Future research should study the impact of diagnostic stewardship interventions and various urine testing strategies to optimize the management of children evaluated for UTI.retain-->.

Decreasing Misdiagnoses of Urinary Tract Infections in a Pediatric Emergency Department

BACKGROUND AND OBJECTIVES

Urinary tract infection (UTI) is a common diagnosis in the emergency department (ED), often resulting in empirical antibiotic treatment before culture results. Diagnosis of a UTI, particularly in children, can be challenging and misdiagnosis is common. The aim of this initiative was to decrease the misdiagnosis of uncomplicated pediatric UTIs by 50% while improving antimicrobial stewardship in the ED over 4 years.

METHODS

By using the Model for Improvement, 3 interventions were developed: (1) an electronic UTI diagnostic algorithm, (2) a callback system, and (3) a standardized discharge antibiotic prescription. Outcome measures included the percentage of patients with UTI misdiagnosis (prescribed antibiotics, but urine culture results negative) and antibiotic days saved. As a balancing measure, positive urine culture results without a UTI diagnosis were reviewed for ED return visits or hospitalization. Statistical process control and run charts were used for analysis.

RESULTS

From 2017 to 2021, the mean UTI misdiagnosis decreased from 54.6% to 26.4%. The adherence to the standardized antibiotic duration improved from 45.1% to 84.6%. With the callback system, 2128 antibiotic days were saved with a median of 89% of patients with negative culture results contacted to discontinue antibiotics. Of 186 patients with positive urine culture results with an unremarkable urinalysis, 14 returned to the ED, and 2 were hospitalized for multiresistant organism UTI treatment.

CONCLUSIONS

A UTI diagnostic algorithm coupled with a callback system safely reduced UTI misdiagnoses and antibiotic usage. Embedding these interventions electronically as a decision support tool, targeted audit and feedback, reminders, and education all supported long-term sustainability.

Urinary tract infections in children: Testing a novel, noninvasive, point-of-care diagnostic marker

OBJECTIVES

Urinary neutrophil gelatinase-associated lipocalin (uNGAL) appears highly accurate to identify urinary tract infections (UTIs) when obtained via catheterization. Our primary aim was to determine the agreement in uNGAL levels between paired catheter and bag urine specimens. Our secondary aim was to compare the diagnostic test characteristics of quantitative uNGAL, dipstick uNGAL (a potential point-of-care test), and urinalysis (UA).

METHODS

This was a prospective study of febrile children < 24 months evaluated for UTIs. We evaluated quantitative uNGAL at a previously identified threshold of 39.1 ng/mL, dipstick uNGAL at its built-in threshold of >50 ng/mL, and UA at standard thresholds for leukocyte esterase (LE). A positive urine culture was defined as >100,000 CFUs/mL of a pathogen.

RESULTS

A total of 211 patients were included (10% with positive urine cultures); 116 had paired catheterized and bagged samples. The agreement between catheterized and bagged samples at a quantitative uNGAL cutoff of ≥39.1 ng/mL was 0.76 (95% confidence interval [CI] = 0.67 to 0.83) and 0.77 (95% CI = 0.68 to 0.84) at a uNGAL dipstick threshold of >50 ng/mL. The area under the receiver operating characteristic curve for uNGAL from a catheterized sample was 0.96 (95% CI = 0.89 to 1.00) compared to 0.93 (95% CI = 0.87 to -0.99) from a bagged sample. The sensitivities of catheterized sample quantitative and dipstick uNGAL (90.5%) were higher than UA at a LE threshold of ≥1+ (57.1%). Bagged-sample uNGAL had lower quantitative and dipstick specificities (both 73.8%) than from catheterized samples (94.3% and 95.3% respectively), similar to UA.

CONCLUSIONS

uNGAL from bagged and catheterized samples showed insufficient agreement to be used interchangeably. The low specificity of uNGAL from bagged samples suggests that sampling technique affects uNGAL levels.

Diagnostic Stewardship: Appropriate Testing and Judicious Treatments

Diagnostic stewardship encompasses the entire diagnosis-to-treatment paradigm in the intensive care unit (ICU). Initially born of the antimicrobial stewardship movement, contemporary diagnostic stewardship aims to promote timely and appropriate diagnostic testing that directly links to management decisions. In the stewardship framework, excessive diagnostic testing in low probability cases is discouraged due to its tendency to generate false-positive results, which have their own downstream consequences. Though the evidence basis for diagnostic stewardship initiatives in the ICU is nascent and largely limited to retrospective analyses, available literature generally suggests that these initiatives are safe, feasible, and associated with similar patient outcomes. As diagnostic testing of critically ill patients becomes increasingly sophisticated in the ensuing decade, a stewardship mindset will aid bedside clinicians in interpreting and incorporating new diagnostic strategies in the ICU.

Evaluation and Management of Well-Appearing Febrile Infants 8 to 60 Days Old

This guideline addresses the evaluation and management of well-appearing, term infants, 8 to 60 days of age, with fever ≥38.0°C. Exclusions are noted. After a commissioned evidence-based review by the Agency for Healthcare Research and Quality, an additional extensive and ongoing review of the literature, and supplemental data from published, peer-reviewed studies provided by active investigators, 21 key action statements were derived. For each key action statement, the quality of evidence and benefit-harm relationship were assessed and graded to determine the strength of recommendations. When appropriate, parents' values and preferences should be incorporated as part of shared decision-making. For diagnostic testing, the committee has attempted to develop numbers needed to test, and for antimicrobial administration, the committee provided numbers needed to treat. Three algorithms summarize the recommendations for infants 8 to 21 days of age, 22 to 28 days of age, and 29 to 60 days of age. The recommendations in this guideline do not indicate an exclusive course of treatment or serve as a standard of medical care. Variations, taking into account individual circumstances, may be appropriate.

Predicting Urinary Tract Infections With Interval Likelihood Ratios

BACKGROUND

Protocols for diagnosing urinary tract infection (UTI) often use arbitrary cutoff values of urinalysis components to guide management. Interval likelihood ratios (ILRs) of urinalysis results may improve the test's precision in predicting UTIs. We calculated the ILR of urinalysis components to estimate the posttest probabilities of UTIs in young children.

METHODS

Review of 2144 visits to the pediatric emergency department of an urban academic hospital from December 2011 to December 2019. Inclusion criteria were age <2 years and having a urinalysis and urine culture sent. ILR boundaries for hemoglobin, protein, and leukocyte esterase were "negative," "trace," "1+," "2+" and "3+." Nitrite was positive or negative. Red blood cells and white blood cells (WBCs) were 0 to 5, 5 to 10, 10 to 20, 20 to 50, 50 to 100, and 100 to 250. Bacteria counts ranged from negative to "loaded." ILRs for each component were calculated and posttest probabilities for UTI were estimated.

RESULTS

The UTI prevalence was 9.2%, with the most common pathogen being Escherichia coli (75.2%). The ILR for leukocyte esterase ranged from 0.20 (negative) to 37.68 (3+) and WBCs ranged from 0.24 (0-5 WBCs) to 47.50 (100-250 WBCs). The ILRs for nitrites were 0.76 (negative) and 25.35 (positive). The ILR for negative bacteria on urinalysis was 0.26 and 14.04 for many bacteria.

CONCLUSIONS

The probability of UTI in young children significantly increases with 3+ leukocyte esterase, positive nitrite results, 20 to 50 or higher WBCs, and/or many or greater bacteria on urinalysis. The probability of UTI only marginally increases with trace or 1+ leukocyte esterase or 5 to 20 WBCs. Our findings can be used to more accurately predict the probability of true UTI in children.

Reducing infant catheterization in the emergency department through clean-catch urine collection

OBJECTIVE

Our emergency department (ED) traditionally relied on urethral catheterization to obtain urine cultures when evaluating infants for urinary tract infections (UTIs). Catheterization is associated with adverse effects, and recent studies have demonstrated clean-catch urine methods can be successfully used to obtain urine cultures. We pursued a quality improvement (QI) initiative aimed at decreasing the frequency of urethral catheterizations in our ED by using an established clean-catch technique to obtain infant urine cultures.

METHODS

We implemented a clean-catch urine collection method, which we entitled "Bladder Massage," for infants 0-6 months of age needing a urine culture in our ED. Exclusions included critical illness, known urologic abnormality, or prior UTI diagnosis. Our primary interventions were educational initiatives. We retrospectively collected data regarding the use of bladder massage. Our balancing measure was the contamination rate of urine cultures obtained via bladder massage technique compared to catheterization.

RESULTS

In our first-year post-implementation, we identified 334 eligible patients. Bladder massage was attempted on 136/334 (40.7%) eligible infants, with 87/136 (64%) successful attempts, thus avoiding catheterization in 26.1% of patients. Our baseline contamination rate from catheterization was 8/488 (1.6%), compared to 10/87 (12%) using bladder massage (P < 0.001), with 9/10 contaminants from female patients.

CONCLUSION

We successfully introduced a method for clean-catch urine cultures in our pediatric ED, averting the need for urethral catheterization in many well-appearing infants. Ongoing efforts must focus on reduction of contamination in females, increased technique usage, and electronic health record changes to facilitate documentation to continue method use.

A novel screening method for pediatric urinary tract infection using ordinary diapers

Urinary tract infection (UTI) is one of the most common bacterial infections in children. The symptoms of UTI in young children are nonspecific, therefore urine should be examined whenever UTI cannot be ruled out. In clinical settings, however, collecting urine from children who are not toilet trained is sometimes difficult, presenting a challenge in UTI management. Here, we developed a “diaper UTI test”, which enables the quick detection of pyuria in ordinary diapers, and investigated its sensitivity and specificity in a clinical study. The diaper UTI test is based on a leukocyte esterase reaction. Reagent was prepared in liquid form so that it can be absorbed by disposable diapers, where it will produce a violet color in the presence of pyuria. For the clinical study, we enrolled children younger than 3 years with potential UTI who underwent bladder catheterization for urine culture and urinalysis. Of the 65 children included, 21 were diagnosed with UTI. The sensitivity and specificity of the diaper UTI test were 90.5% (95% CI 69.6–98.8) and 93.2% (95% CI 81.3–98.6), respectively. Because of its convenience and good sensitivity, the diaper UTI test may be useful in the screening of pediatric UTI.

Standardizing Preoperative Evaluation for Pediatric Central Venous Access: A Care Algorithm to Improve Safety

Central vascular access device (CVAD) placement is a common procedure in children. When selecting a CVAD, available evidence and specified indications should be used to choose the device that best supports the patient's treatment and carries the lowest risks. A multidisciplinary team developed a care algorithm to standardize preoperative screening before pediatric CVAD placement, with 3 major parts: CVAD selection, patient risk stratification, and preoperative evaluation. Using a stepwise approach of provider education and incorporation into the electronic health record, the team achieved 82% stratification among inpatients. The team's algorithm integrates the existing literature and recommendations for safe and effective CVAD placement.

Urinary Tract Infection in Febrile Children with Sickle Cell Disease Who Present to the Emergency Room with Fever

Sickle cell disease (SCD) patients are thought to be at higher risk for urinary tract infections (UTIs) compared to the general population secondary to increased sickling, abnormal urinary acidification, and an inability to concentrate the urine. The incidence of UTI in febrile children with SCD in the United States is unknown. Our objectives were to determine the rate of UTI among febrile SCD children and describe the risk factors for UTI in this population. We conducted a retrospective chart review of all febrile SCD patients <4 years of age who presented to a pediatric emergency department from 2012–2017 and who had a sterile sample of urine for analysis. A total of 167 febrile patients with SCD with 464 visits were identified. The majority were African American (95.2%), female (58.7%), and had hemoglobin SS (HbSS) (65.3%). The rate of UTI was 4.1%. All patients with a UTI were African American females with a median age of 19 months (IQR 12–30). On regression analysis, no risk factors were associated with a UTI. We found the rate of UTI in febrile young children with SCD was comparable to non-SCD children. Larger studies are required to identify the presence of risk factors for UTI in this population.

Updated Italian recommendations for the diagnosis, treatment and follow-up of the first febrile urinary tract infection in young children

AIM

Our aim was to update the recommendations for the diagnosis, treatment and follow-up of the first febrile urinary tract infection in young children, which were endorsed in 2012 by the Italian Society of Pediatric Nephrology.

METHODS

The Italian recommendations were revised on the basis of a review of the literature published from 2012 to October 2018. We also carried out an ad hoc evaluation of the risk factors to identify children with high-grade vesicoureteral reflux or renal scarring, which were published in the previous recommendations. When evidence was not available, the working group held extensive discussions, during various meetings and through email exchanges.

RESULTS

Four major modifications have been introduced. The method for collecting urine for culture and its interpretation has been re-evaluated. We have reformulated the algorithm that guides clinical decisions to proceed with voiding cystourethrography. The suggested antibiotics have been revised, and we have recommended further restrictions of the use of antibiotic prophylaxis.

CONCLUSION

These updated recommendations have now been endorsed by the Italian Society of Pediatric Nephrology and the Italian Society for Pediatric Infectivology. They can also be used to compare other recommendations that are available, as a worldwide consensus in this area is still lacking.

Pain experienced by infants and toddlers at urine collection bag removal: A randomized, controlled, clinical trial

BACKGROUND

In pre-continent children, collection bags are frequently used as a first-line option to obtain a urine specimen. This practice, acknowledged by several guidelines for the step of UTI screening, is driven by a perception of the technique as being more convenient and less painful. However, our own experience led us to consider bag removal as a painful experience.

OBJECTIVE

Our aim was to determine whether the use of an oleo-calcareous liniment to aid bag removal reduced the acute pain expressed by young children.

METHODS

This prospective, randomized, controlled, single blind study was carried out in two emergency pediatrics departments. Pre-continent children aged 0-36 months admitted with an indication for urine testing were eligible for the study. Urine for dipstick test screening was obtained using a collection bag. At micturition, the patients were randomized into bag removal with (intervention group) or without (control group) liniment. Bag removal was recorded on video in such a manner as to permit independent assessments of pain by two evaluators blinded to group allocation. Pain was assessed using the FLACC scale.

FINDINGS

135 patients were analyzed: 70 in the intervention group and 65 in the control group. The median FLACC scores [interquartile range] for the intervention and control groups, respectively 4.0 [2.0-7.0] and 4.0 [3.0-7.0], did not differ significantly (p = 0.5). A FLACC score ≥4 was obtained for 56% of the patients and a score ≥7 for 28%.

CONCLUSION

Removal of urine collection bags caused moderate to severe pain in half of the children included. The use of an oleo-calcareous liniment did not reduce this induced pain.

Association of Diagnostic Criteria With Urinary Tract Infection Prevalence in Bronchiolitis: A Systematic Review and Meta-analysis

IMPORTANCE

Concomitant urinary tract infection (UTI) is a frequent concern in febrile infants with bronchiolitis, with a prior meta-analysis suggesting a prevalence of 3.3%. However, the definition of UTI in these studies has generally not incorporated urinalysis (UA) results.

OBJECTIVE

To conduct a systematic review and meta-analysis examining the prevalence of UTI in infants with bronchiolitis when positive UA results are incorporated into the UTI definition.

DATA SOURCES

Medline (1946-2017) and Ovid EMBASE (1976-2017) through August 2017 and bibliographies of retrieved articles.

STUDY SELECTION

Studies reporting UTI prevalence in bronchiolitis.

DATA EXTRACTION

Data were extracted in accordance with meta-analysis of observational studies in epidemiology guidelines via independent abstraction by multiple investigators. Random-effects models generated a weighted pooled event rate with corresponding 95% confidence intervals.

MAIN OUTCOMES AND MEASURES

Prevalence of UTI.

RESULTS

We screened 477 unique articles by abstract, with full-text review of 30 studies. Eighteen bronchiolitis studies reported a UTI prevalence and 7 of these reported UA data for inclusion in the meta-analysis. The overall reported prevalence of UTI in bronchiolitis from these 18 studies was 3.1% (95% CI, 1.8%-4.6%). With the addition of positive UA results (defined as the presence of pyuria or nitrites) as a diagnostic criterion, the prevalence of UTI as reported in the 7 studies in bronchiolitis was 0.8% (95% CI, 0.3%-1.4%). Sensitivity analyses yielded similar results, including for infants younger than 90 days. Heterogeneous definitions of UTI and UA criteria introduced uncertainty into prevalence estimates.

CONCLUSIONS AND RELEVANCE

When a positive UA result is added as a diagnostic criterion, the estimated prevalence of concomitant UTI is less than recommended testing thresholds for bronchiolitis.

Reducing Invasive Care for Low-risk Febrile Infants Through Implementation of a Clinical Pathway

BACKGROUND AND OBJECTIVES

Significant variation in management of febrile infants exists both nationally and within our institution. Risk stratification can be used to identify low-risk infants who can be managed as outpatients without lumbar puncture (LP) or antibiotics. Our objective was to reduce invasive interventions for febrile infants aged 29 to 60 days at low risk for serious bacterial infection (SBI) through implementation of a clinical pathway supported by quality improvement (QI).

METHODS

The evidence-based clinical pathway was developed and implemented by a multidisciplinary team with continuous-process QI to sustain use. Low-risk infants who underwent LP, received antibiotics, and were admitted to the hospital were compared pre- and postpathway implementation with SBI in low-risk infants and appropriate care for high-risk infants as balancing measures.

RESULTS

Of 350 included patients, 220 were pre- and 130 were postpathway implementation. With pathway implementation in July 2016, invasive interventions decreased significantly in low-risk infants, with LPs decreasing from 32% to 0%, antibiotic administration from 30% to 1%, and hospital admission from 17% to 2%. Postimplementation, there were 0 SBIs in low-risk infants versus 29.2% in high-risk infants. The percentage of high-risk patients receiving care per pathway remained unchanged. Improvement was sustained for 12 months through QI interventions, including order-set development and e-mail reminders.

CONCLUSIONS

Implementation of a clinical pathway by using QI methods resulted in sustained reduction in invasive interventions for low-risk febrile infants without missed SBIs. Clinical pathways and QI can be key strategies in the delivery of evidence-based care for febrile infants.

Urinary tract infections in children: an overview of diagnosis and management

Urinary tract infections (UTIs) are a common and potentially serious bacterial infection of childhood. History and examination findings can be non-specific, so a urine sample is required to diagnose UTI. Sample collection in young precontinent children can be challenging. Bedside dipstick tests are useful for screening, but urine culture is required for diagnostic confirmation. Antibiotic therapy must be guided by local guidelines due to increasing antibiotic resistance. Duration of therapy and indications for imaging remain controversial topics and guidelines lack consensus. This article presents an overview of paediatric UTI diagnosis and management, with highlights of recent advances and evidence updates.

Development and Validation of a Calculator for Estimating the Probability of Urinary Tract Infection in Young Febrile Children

IMPORTANCE

Accurately estimating the probability of urinary tract infection (UTI) in febrile preverbal children is necessary to appropriately target testing and treatment.

OBJECTIVE

To develop and test a calculator (UTICalc) that can first estimate the probability of UTI based on clinical variables and then update that probability based on laboratory results.

DESIGN, SETTING, AND PARTICIPANTS

Review of electronic medical records of febrile children aged 2 to 23 months who were brought to the emergency department of Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania. An independent training database comprising 1686 patients brought to the emergency department between January 1, 2007, and April 30, 2013, and a validation database of 384 patients were created. Five multivariable logistic regression models for predicting risk of UTI were trained and tested. The clinical model included only clinical variables; the remaining models incorporated laboratory results. Data analysis was performed between June 18, 2013, and January 12, 2018.

EXPOSURES

Documented temperature of 38°C or higher in children aged 2 months to less than 2 years.

MAIN OUTCOMES AND MEASURES

With the use of culture-confirmed UTI as the main outcome, cutoffs for high and low UTI risk were identified for each model. The resultant models were incorporated into a calculation tool, UTICalc, which was used to evaluate medical records.

RESULTS

A total of 2070 children were included in the study. The training database comprised 1686 children, of whom 1216 (72.1%) were female and 1167 (69.2%) white. The validation database comprised 384 children, of whom 291 (75.8%) were female and 200 (52.1%) white. Compared with the American Academy of Pediatrics algorithm, the clinical model in UTICalc reduced testing by 8.1% (95% CI, 4.2%-12.0%) and decreased the number of UTIs that were missed from 3 cases to none. Compared with empirically treating all children with a leukocyte esterase test result of 1+ or higher, the dipstick model in UTICalc would have reduced the number of treatment delays by 10.6% (95% CI, 0.9%-20.4%).

CONCLUSIONS AND RELEVANCE

UTICalc estimates the probability of UTI by evaluating the risk factors present in the individual child. As a result, testing and treatment can be tailored, thereby improving outcomes for children with UTI.