Subtopic Deep Dive
Kasai Portoenterostomy Outcomes
Research Guide
What is Kasai Portoenterostomy Outcomes?
Kasai portoenterostomy outcomes evaluate long-term success rates, prognostic factors, and complications of the Kasai procedure for biliary atresia in pediatric patients.
The Kasai procedure aims to restore bile flow in infants with biliary atresia through hepatic portoenterostomy. Outcomes depend on surgical timing, with operations before 45 days yielding better jaundice clearance (Serinet et al., 2009, 436 citations). Long-term survival without transplantation reaches 23% at 20 years post-surgery (Lykavieris et al., 2005, 289 citations). Over 10 key papers from 1977-2018 analyze screening, age effects, and transplantation-era prognosis.
Why It Matters
Optimizing Kasai outcomes delays liver transplantation, reducing mortality in resource-limited settings. Serinet et al. (2009) showed age <45 days at surgery triples native liver survival into adolescence, supporting stool color card screening (Hsiao et al., 2008). Chardot et al. (2013) reported improved 10-year survival from 35% to 48% (1986-2009) via earlier diagnosis, averting 20-30% of pediatric transplants annually. Lykavieris et al. (2005) found 23% adulthood survival without transplant, emphasizing prognostic factors like cholangitis prevention.
Key Research Challenges
Optimal Surgical Timing
Delay beyond 45-60 days worsens jaundice clearance and native liver survival (Serinet et al., 2009, 436 citations). No universal age threshold exists despite screening efforts (Sokol et al., 2007). Long-term follow-up shows persistent age effects into adolescence.
Postoperative Cholangitis
Recurrent cholangitis drives fibrosis progression post-Kasai (Bezerra et al., 2018). French studies link early cholangitis to 50% transplant need within 5 years (Chardot et al., 1999, 273 citations). Antibiotic prophylaxis efficacy varies.
Screening Program Efficacy
Stool color cards detect 90% cases early in Taiwan (Hsiao et al., 2008, 308 citations), but global adoption lags. False negatives delay Kasai, reducing outcomes (Sokol et al., 2007). Cost-effectiveness in low-resource areas unproven.
Essential Papers
Congenital Diseases of Intrahepatic Bile Ducts: Variations on the Theme “Ductal Plate Malformation”
Valeer Desmet · 1992 · Hepatology · 586 citations
Congenital diseases of intrahepatic bile ducts (IHBDs) can be divided into two main groups: diseases characterized by necroinflammatory destruction of IHBDs and diseases characterized by a variable...
Rapid whole-genome sequencing decreases infant morbidity and cost of hospitalization
Lauge Farnaes, Amber Hildreth, Nathaly M. Sweeney et al. · 2018 · npj Genomic Medicine · 437 citations
Abstract Genetic disorders are a leading cause of morbidity and mortality in infants. Rapid whole-genome sequencing (rWGS) can diagnose genetic disorders in time to change acute medical or surgical...
Impact of Age at Kasai Operation on Its Results in Late Childhood and Adolescence: A Rational Basis for Biliary Atresia Screening
Marie‐Odile Serinet, Barbara E. Wildhaber, Pierre Broué et al. · 2009 · PEDIATRICS · 436 citations
BACKGROUND. Increased age at surgery has a negative impact on results of the Kasai operation for biliary atresia in infancy and early childhood. It remained unclear if an age threshold exists and i...
Biliary Atresia: Clinical and Research Challenges for the Twenty‐First Century
Jorge A. Bezerra, Rebecca G. Wells, Cara L. Mack et al. · 2018 · Hepatology · 327 citations
Biliary atresia (BA) is a fibroinflammatory disease of the intrahepatic and extrahepatic biliary tree. Surgical hepatic portoenterostomy (HPE) may restore bile drainage, but progression of the intr...
Universal screening for biliary atresia using an infant stool color card in Taiwan†
Cheng‐Hui Hsiao, Mei‐Hwei Chang, Huey‐Ling Chen et al. · 2008 · Hepatology · 308 citations
Universal screening using the stool color cards can enhance earlier referral, which may ultimately lead to timely performance of the Kasai operation and better postoperative outcome in infants with...
Outcome in adulthood of biliary atresia
Panayotis Lykavieris, Christophe Chardot, Maroun Sokhn et al. · 2005 · Hepatology · 289 citations
To define the long-term prognosis of children undergoing the Kasai operation for biliary atresia, a retrospective study was undertaken comprising 271 patients operated between 1968 and 1983. Twenty...
Prognosis of biliary atresia in the era of liver transplantation: French national study from 1986 to 1996
Christophe Chardot, Matthieu Carton, Nathalie Spire-Bendelac et al. · 1999 · Hepatology · 273 citations
Since the sequential treatment of Kasai operation with or without liver transplantation became available, the overall prognosis of biliary atresia remains unclear. This study examined the prognosti...
Reading Guide
Foundational Papers
Read Serinet et al. (2009) first for age at Kasai effects on long-term survival; Lykavieris et al. (2005) for adulthood outcomes in 271 patients; Chardot et al. (1999) for transplantation-era prognosis.
Recent Advances
Study Chardot et al. (2013) for 1986-2009 improvements; Bezerra et al. (2018) for research challenges including intrahepatic progression.
Core Methods
Kaplan-Meier survival analysis (Serinet 2009); national cohort registries (Chardot 1999, 2013); stool color screening trials (Hsiao 2008).
How PapersFlow Helps You Research Kasai Portoenterostomy Outcomes
Discover & Search
Research Agent uses searchPapers('Kasai portoenterostomy age threshold') to find Serinet et al. (2009), then citationGraph reveals 436 citing papers on timing effects and findSimilarPapers uncovers Chardot et al. (2013) for outcome trends. exaSearch('biliary atresia screening stool color') surfaces Hsiao et al. (2008) alongside global variants.
Analyze & Verify
Analysis Agent applies readPaperContent on Serinet et al. (2009) to extract survival curves by age group, then runPythonAnalysis with pandas fits Kaplan-Meier models from outcome data for statistical verification. verifyResponse (CoVe) cross-checks claims against Lykavieris et al. (2005), with GRADE grading assigns high evidence to age <45 days prognostic value.
Synthesize & Write
Synthesis Agent detects gaps in cholangitis prevention post-Kasai via contradiction flagging between Bezerra et al. (2018) and Chardot et al. (1999). Writing Agent uses latexEditText to draft outcomes tables, latexSyncCitations integrates 10 key papers, and latexCompile generates review manuscript. exportMermaid visualizes survival timelines from Serinet and Lykavieris data.
Use Cases
"Extract survival rates by Kasai age from French cohorts and plot Kaplan-Meier curves"
Research Agent → searchPapers → readPaperContent (Serinet 2009, Chardot 2013) → Analysis Agent → runPythonAnalysis (pandas survival analysis, matplotlib plot) → researcher gets CSV-exported curves with p-values.
"Write LaTeX review on Kasai long-term outcomes citing top 5 papers"
Research Agent → citationGraph (Chardot cluster) → Synthesis Agent → gap detection → Writing Agent → latexEditText (intro/outcomes), latexSyncCitations, latexCompile → researcher gets compiled PDF with figures.
"Find code for biliary atresia outcome modeling from related papers"
Research Agent → searchPapers('biliary atresia simulation') → Code Discovery → paperExtractUrls → paperFindGithubRepo → githubRepoInspect → researcher gets R scripts for Cox regression from linked repos.
Automated Workflows
Deep Research workflow scans 50+ Kasai papers via searchPapers → citationGraph, producing structured report with GRADE-scored outcomes by era (Chardot 1986-2009). DeepScan applies 7-step CoVe to verify Serinet et al. (2009) age threshold across cohorts. Theorizer generates hypotheses on ductal plate links (Desmet 1992) to Kasai failure mechanisms.
Frequently Asked Questions
What defines Kasai portoenterostomy outcomes?
Outcomes measure jaundice clearance, native liver survival, and transplant-free rates post-hepatic portoenterostomy for biliary atresia (Serinet et al., 2009).
What are key methods for studying Kasai outcomes?
Retrospective cohort analyses track long-term survival (Lykavieris et al., 2005); screening trials use stool color cards (Hsiao et al., 2008); Kaplan-Meier statistics assess age effects (Chardot et al., 2013).
What are landmark papers on Kasai outcomes?
Serinet et al. (2009, 436 citations) on age impact; Lykavieris et al. (2005, 289 citations) on adulthood prognosis; Chardot et al. (2013, 239 citations) on era improvements.
What open problems remain in Kasai outcomes?
Optimal cholangitis prophylaxis lacks consensus (Bezerra et al., 2018); global screening scalability unproven (Sokol et al., 2007); genetic modifiers of surgical response unclear.
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