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Pediatric CLABSI Case Discussion: DTP, Catheter Salvage, and QI [ Case Discussion ](https://mdster.com/blog?category=case-discussion) Pediatric CLABSI Case Discussion: DTP, Catheter Salvage, and QI ================================================================= How paired cultures, lock therapy, and unit-level improvement shape source control in a child with short bowel syndrome on home TPN [ MDster Editorial Team ](https://mdster.com/about) · Jul 16, 2026 · 7 min read · 30 [ Reviewed by Dr. Ali Ragab, MBBCH, MSc, MCAI ](https://mdster.com/medical-reviewers/dr-ali-ragab) [Editorial Policy](https://mdster.com/editorial-policy) | [Corrections Policy](https://mdster.com/corrections) [ Sepsis ](https://mdster.com/blog?tag=sepsis) [ Patient Safety ](https://mdster.com/blog?tag=patient-safety) [ Pediatrics ](https://mdster.com/blog?tag=pediatrics) [ Infectious Disease ](https://mdster.com/blog?tag=infectious-disease) [ Parenteral Nutrition ](https://mdster.com/blog?tag=parenteral-nutrition) ![Pediatric CLABSI Case Discussion: DTP, Catheter Salvage, and QI](https://mdster.com/storage/blog/images/pediatric-clabsi-case-discussion-dtp-catheter-salvage-and-qi.jpg) Share this article Share this post On this page 1. [ The bedside diagnosis ](#the-bedside-diagnosis) 2. [ Interpreting the culture timing ](#interpreting-the-culture-timing) 3. [ Differential and workup ](#differential-and-workup) 4. [ Management: stabilize first, then decide on salvage ](#management-stabilize-first-then-decide-on-salvage) 5. [ Early resuscitation ](#early-resuscitation) 6. [ When is catheter salvage reasonable? ](#when-is-catheter-salvage-reasonable) 7. [ When three CLABSIs occur in one month ](#when-three-clabsis-occur-in-one-month) 8. [ Cognitive trap ](#cognitive-trap) 9. [ Clinical Application ](#clinical-application) 10. [ Key Points for Board Exams ](#key-points-for-board-exams) 11. [ Conclusion ](#conclusion) 12. [ Frequently Asked Questions ](#blog-faqs) 13. [ References ](#references-heading) On this page 1. [ The bedside diagnosis ](#the-bedside-diagnosis) 2. [ Interpreting the culture timing ](#interpreting-the-culture-timing) 3. [ Differential and workup ](#differential-and-workup) 4. [ Management: stabilize first, then decide on salvage ](#management-stabilize-first-then-decide-on-salvage) 5. [ Early resuscitation ](#early-resuscitation) 6. [ When is catheter salvage reasonable? ](#when-is-catheter-salvage-reasonable) 7. [ When three CLABSIs occur in one month ](#when-three-clabsis-occur-in-one-month) 8. [ Cognitive trap ](#cognitive-trap) 9. [ Clinical Application ](#clinical-application) 10. [ Key Points for Board Exams ](#key-points-for-board-exams) 11. [ Conclusion ](#conclusion) 12. [ Frequently Asked Questions ](#blog-faqs) 13. [ References ](#references-heading) A febrile 4-year-old with short bowel syndrome and a Broviac should make you think line sepsis before you are reassured by a clean exit site. In children with intestinal failure and an indwelling CVC, fever or clinical deterioration warrants presumptive evaluation for CLABSI or CRBSI because delay costs hemodynamic reserve and sometimes the line itself. [\[1\]](#cite-1 "Reference [1]") The bedside diagnosis --------------------- ### Interpreting the culture timing This vignette becomes much more specific once the central culture turns positive at 14 hours and the peripheral culture at 17 hours. A differential time to positivity of at least 2 hours strongly supports a catheter-related bloodstream infection, so a 3-hour gap makes the Broviac the leading source. [\[1\]](#cite-1 "Reference [1]") The clean exit site does not rescue the catheter from suspicion. Long-term lines are often infected intraluminally; after about 2 weeks, hub-related spread becomes increasingly important, which is why paired cultures matter more than skin appearance. [\[2\]](#cite-2 "Reference [2]") A quick way to organize the data is below. [\[1\]](#cite-1 "Reference [1]") FindingInterpretationManagement signalCentral culture positive 3 h earlierMeets DTP criterion for CRBSITreat as line sourceNo tunnel or exit-site inflammationDoes not exclude intraluminal infectionSalvage may still be possibleOngoing bacteremia at 48-72 hSuggests complicated infectionRemove line and search for metastatic foci Differential and workup ----------------------- The differential should stay wider than line infection alone. At the bedside I would still consider: - CRBSI or CLABSI from the Broviac - another bloodstream source unrelated to the catheter - contaminated PN or infusate, particularly if the unit is seeing a cluster - catheter-associated thrombosis or metastatic infection if cultures stay positive. [\[1\]](#cite-1 "Reference [1]") The workup that actually changes management is straightforward: - obtain paired blood cultures from the catheter and a peripheral vein before antibiotics whenever feasible - inspect the exit site and tunnel, but do not use a normal exam to rule out CRBSI - repeat blood cultures if fever or bacteremia persists after therapy begins - look for suppurative thrombophlebitis, endocarditis, or other metastatic infection when bacteremia persists beyond 72 hours or when high-risk organisms are isolated. [\[1\]](#cite-1 "Reference [1]") Management: stabilize first, then decide on salvage --------------------------------------------------- ### Early resuscitation This child is already showing compensated-to-decompensating shock physiology. Current pediatric sepsis guidance supports 10-20 mL/kg crystalloid boluses with reassessment after each bolus; in systems with intensive care availability, up to 40-60 mL/kg may be given in the first hour if shock persists and fluid overload does not develop, and vasoactive therapy should not be delayed for central access if the child remains unstable. [\[3\]](#cite-3 "Reference [3]") Empiric antimicrobials should cover staphylococci and Gram-negative bacilli while cultures finalize. Once susceptibilities return, narrow therapy and let the organism, the clinical trajectory, and the child’s vascular access history drive the source-control decision. [\[1\]](#cite-1 "Reference [1]") ### When is catheter salvage reasonable? Catheter salvage is most defensible in a child with a long-term tunneled line, no tunnel or port infection, no hemodynamic deterioration after resuscitation, and an organism that is not classically high risk for failure. If the catheter is retained, pediatric nutrition guidance extrapolated from adult data generally uses 10-14 days of systemic therapy when the child improves clinically and microbiologically within 48-72 hours. [\[1\]](#cite-1 "Reference [1]") Antibiotic lock therapy is the classic exam trap. The correct principle is that lock therapy is an adjunct for long-term catheter salvage when there is no exit-site or tunnel infection; it should not be used alone, and adult-derived guidance recommends combining it with systemic therapy for 7-14 days. Pediatric data are thinner, so judgment matters more than reflexively ordering a lock. [\[2\]](#cite-2 "Reference [2]") Remove the line early if the child deteriorates, bacteremia persists after 72 hours of active therapy, a tunnel or port infection is present, or the isolate is **S. aureus**, **Pseudomonas**, or **Candida** unless there are exceptional access constraints. The 2026 pediatric sepsis update also reinforces source control: if the intravascular device is confirmed as the source, remove it after alternative access is secured and the risks are weighed. [\[2\]](#cite-2 "Reference [2]") When three CLABSIs occur in one month ------------------------------------- A cluster changes the question from why did this child get infected to what in our system is repeatedly failing. AHRQ specifically highlights fishbone analysis within root-cause work, and IHI’s classic fishbone categories map well to CLABSI review: people, methods, materials, environment, and equipment. [\[4\]](#cite-4 "Reference [4]") Once failure modes are listed, use a Pareto chart to identify the vital few defects occurring most often. The daily maintenance bundle should emphasize hand hygiene before every access, hub disinfection with an appropriate antiseptic and sterile access, dressing integrity with change if loose or soiled, and daily review of line necessity; notably, CDC does not make a pediatric recommendation for chlorhexidine-impregnated dressings because evidence is insufficient in patients younger than 18 years. [\[5\]](#cite-5 "Reference [5]") For a targeted compliance problem like poor *scrub the hub* performance, use a small PDSA cycle. In the **Plan** phase, define the aim, prediction, metric, and who will collect data; in the **Do** phase, test the change on a small scale and capture both compliance data and unexpected barriers. [\[6\]](#cite-6 "Reference [6]") ### Cognitive trap The resident who thought the child looked too well illustrates fast, intuitive Type 1 processing with anchoring on the first impression. In high-risk children with home PN, a useful forcing rule is simple: fever plus central line equals presumed sepsis until the data prove otherwise. [\[7\]](#cite-7 "Reference [7]") Clinical Application -------------------- > **Clinical Pearl:** In a child with a tunneled line, a central culture that turns positive more than 2 hours before the peripheral culture is not a minor lab detail; it is source-control information. [\[1\]](#cite-1 "Reference [1]") If this were your patient on rounds, the practical sequence is: resuscitate, obtain paired cultures, start broad therapy, interpret DTP early, then decide whether the child has earned catheter salvage or declared a need for removal. In parallel, a unit-level cluster demands maintenance-bundle auditing rather than another lecture about being more careful. [\[3\]](#cite-3 "Reference [3]") Key Points for Board Exams -------------------------- - In children with intestinal failure and a CVC, fever should trigger suspicion for CLABSI or CRBSI until proved otherwise. [\[1\]](#cite-1 "Reference [1]") - A DTP of at least 2 hours, with the catheter culture becoming positive first, supports CRBSI; this case has a 3-hour gap. [\[1\]](#cite-1 "Reference [1]") - Antibiotic lock therapy is for attempted salvage of long-term catheters without tunnel or exit-site infection, and it should not be used alone. [\[2\]](#cite-2 "Reference [2]") - Remove the line for persistent bacteremia after 72 hours, tunnel or port infection, severe sepsis, or high-risk organisms such as **S. aureus**, **Pseudomonas**, and **Candida**. [\[2\]](#cite-2 "Reference [2]") - For unit clusters, fishbone analysis identifies causes, Pareto charts prioritize frequent failures, and PDSA cycles test fixes on a small scale. [\[4\]](#cite-4 "Reference [4]") Conclusion ---------- This is classic pediatric board material because it tests three layers at once: sepsis recognition, interpretation of paired cultures, and the judgment call between salvage and source control. The best teams manage the child in front of them while simultaneously fixing the process that made the fourth case possible. [\[3\]](#cite-3 "Reference [3]") Frequently Asked Questions ---------------------------- ### What differential time to positivity suggests the catheter is the source? A catheter-drawn culture that becomes positive at least 2 hours before the peripheral culture supports CRBSI. In this case, 14 versus 17 hours is strongly supportive. [\[1\]](#cite-1 "Reference [1]") ### Can antibiotic lock therapy salvage an infected Broviac by itself? No. Antibiotic lock therapy should be used only as an adjunct to systemic antimicrobial therapy when catheter salvage is the goal and there is no exit-site or tunnel infection. [\[2\]](#cite-2 "Reference [2]") ### When should a tunneled central line be removed rather than salvaged? Remove the line for persistent bacteremia after 72 hours of active therapy, tunnel or port infection, severe sepsis, or infection due to high-risk organisms such as **S. aureus**, **Pseudomonas**, or **Candida**, unless access constraints are extraordinary. [\[2\]](#cite-2 "Reference [2]") ### Which QI tools are most useful after a CLABSI cluster is recognized? Use a fishbone diagram for root-cause analysis, a Pareto chart to prioritize the most frequent failures, and PDSA cycles to test corrective actions on a small scale before wider rollout. [\[8\]](#cite-8 "Reference [8]") References (9) ------------------ 1. 1. [ Hartman C, et al. ESPGHAN/ESPEN/ESPR Guidelines on Pediatric Parenteral Nutrition: Complications. ](https://www.espen.org/files/ESPEN-Guidelines/Pediatrics/ESPGHAN_ESPEN_ESPR-guidelines-on-pediatric-parenteral-nutrition-Complications.pdf) [↩](#cite-ref-1-1 "Back to text") 2. 2. [ Mermel LA, et al. Clinical Practice Guidelines for the Diagnosis and Management of Intravascular Catheter-Related Infection: 2009 Update by the IDSA. ](https://academic.oup.com/cid/article/49/1/1/369414) [↩](#cite-ref-2-1 "Back to text") 3. 3. [ SCCM. Surviving Sepsis Campaign International Guidelines for the Management of Sepsis and Septic Shock in Children 2026. ](https://sccm.org/survivingsepsiscampaign/guidelines-and-resources/surviving-sepsis-campaign-pediatric-guidelines) [↩](#cite-ref-3-1 "Back to text") 4. 4. [ AHRQ. Using Root Cause Analysis to Improve Quality and Performance. ](https://www.ahrq.gov/evidencenow/tools/root-cause-analysis.html) [↩](#cite-ref-4-1 "Back to text") 5. 5. [ www.ihi.org/library/tools/pareto-chart ](https://www.ihi.org/library/tools/pareto-chart) [↩](#cite-ref-5-1 "Back to text") 6. 6. [ AHRQ. The Improvement Cycle: Plan-Do-Study-Act. ](https://www.ahrq.gov/cahps/improvement-guide/improvement-models/plan-do-study-act.html) [↩](#cite-ref-6-1 "Back to text") 7. 7. [ psnet.ahrq.gov/primer/coronavirus-disease-2019-covid-19-and-diagnostic-error ](https://psnet.ahrq.gov/primer/coronavirus-disease-2019-covid-19-and-diagnostic-error) [↩](#cite-ref-7-1 "Back to text") 8. 8. [ www.ihi.org/library/tools/cause-and-effect-diagram ](https://www.ihi.org/library/tools/cause-and-effect-diagram) [↩](#cite-ref-8-1 "Back to text") 9. 9. [ CDC. Summary of Recommendations: Guidelines for the Prevention of Intravascular Catheter-Related Infections. ](https://www.cdc.gov/infection-control/hcp/intravascular-catheter-related-infections/summary-recommendations.html) Next Practice Pediatrics the way boards test ----------------------------------------- - Age‑specific differentials and management - Growth, development, and immunizations - Target weak areas with smart review [ Start practicing ](https://mdster.com/user/dashboard) [ Pediatrics ](https://mdster.com/speciality/pediatrics) [ View pricing ](https://mdster.com/pricing) [ Explore features ](https://mdster.com/features) No credit card required. Full access to all features\*. No commitment. Cancel anytime. \*AI SOE Examiner is limited to 10 cases monthly for Advanced & Bundle subscribers. 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