Empirical research guiding pediatric surgical practice has historically been limited not only by the rarity of major diseases, such as pediatric cancers and congenital anomalies, but also by the absence of data on social determinants of health that contextualize children’s outcomes. The rapid growth of health information technology and data-sharing capabilities has created unprecedented opportunities to integrate clinical and social dimensions of care, expand our understanding of rare pediatric surgical diseases, and optimize equitable care through understanding of how biological and structural factors intersect to influence outcomes and access.
Our laboratory leverages these advances to study severe illnesses such as esophageal atresia, congenital diaphragmatic hernia, abdominal wall defects, congenital lung malformations, and other complex birth defects and tumors. We aim to understand not only their clinical outcomes but also how these are shaped by social determinants of health, including race, household income, and health-related social needs such as food insecurity and housing instability.
By harnessing “big data” and fostering national and international partnerships, our laboratory seeks to address long-standing and often contentious questions in pediatric surgery while illuminating the social and systemic factors that influence care. Our work focuses on three broad domains of pediatric surgical research:
- Improving surgical management protocols to enhance patient outcomes and standardize best practices.
- Identifying low-value or potentially harmful care to reduce unnecessary interventions and optimize resource use.
- Advancing global surgical equity by examining the intersection of social determinants and health systems, and addressing barriers that prevent equal access to safe, high-quality surgical care worldwide.
Through these efforts, and in close collaboration with our collaborators, we aim to define pathways toward more equitable, data-driven, and patient-centered surgical care for all children.
Research Director
Dr. Faraz Khan
Mission Statement
To advance the quality, safety, and accessibility of pediatric surgical care worldwide through data-driven research, innovation in clinical practice, and global collaboration.
Goals
- Develop evidence-based, data-driven clinical benchmarks to standardize surgical care delivery.
- Design and implement targeted quality improvement initiatives.
- Build global partnerships to expand equitable access to surgical care.
Research Team
Anam Ehsan, MBBS
Anam is a postdoctoral research fellow within the Division of Pediatric Surgery at Stanford University.
She completed her medical education at the Aga Khan University in Pakistan, followed by research fellowships in global surgery and health services research at Harvard Medical School and Brigham and Women’s Hospital. Anam joined Dr. Khan’s lab in 2025, where she leads national and international projects at the intersection of pediatric surgery, data science, and health equity. She helped establish one of the first multicenter prospective studies on financial toxicity in surgical care in India and serves as a research and value-based healthcare advisor to the Global Surgery Foundation. Her current research focuses on integrating social determinants of health into pediatric surgical outcomes and building collaborative data systems that link clinical, social, and economic factors to improve child health worldwide.
Humza Thobani, MBBS
Humza is a postdoctoral research fellow within the Division of Pediatric Surgery at Stanford.
He completed his medical education at the Aga Khan University in Pakistan, followed by a one-year research fellowship in pediatric surgery. Humza joined Dr. Khan’s lab at Stanford in 2024 and has since spearheaded several of the lab’s completed and ongoing projects. He developed an interest in health data science early in medical school, where he helped design one of the first billing code-based data registries in Pakistan. In Dr. Khan’s lab, his work focuses on utilizing national electronic health record (EHR) based data repositories to create evidence-based care pathways for neonatal surgical diseases.
Daniel Tahan, BS
Daniel is a medical student at Tulane University School of Medicine and a visiting researcher in the Division of Pediatric Surgery at Stanford University.
He completed his undergraduate degree in Economics before beginning medical training. At Tulane, he co-founded the Deep South’s first student-run clinic for refugee and MENA communities and participates in the DeBakey Scholars Program. He first joined Dr. Khan’s lab as a summer intern, investigating congenital lung malformations in children, and returned in 2025 to continue his research. His current work explores the continuum from prenatal diagnosis of CLMs to their long-term postnatal outcomes.
Bilal Iqbal, MBBS
Bilal is a visiting instructor in the Department of Pediatric Surgery at Stanford.
He earned his medical degree at the Aga Khan University and subsequently pursued a research fellowship focused in aortic and structural interventions, and the public health burden of cardiac disease. He subsequently pursued a clinical internship at his alma mater. Bilal joined the lab in 2025, where his research will focus on building databases and predictive models to study outcomes in congenital anomalies and rare diseases; leveraging artificial intelligence and machine learning in process. His prior work has also contributed to literature in this realm.
Administrative Team
Samrawit Gebregziabher
samrawit@stanford.edu
(650)724-1721
Bibliography
Publications
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US multicentre randomised controlled trial protocol: Comparing Analgesic Regimen Effectiveness and Safety after surgery trial for Kids (CARES for Kids).
BMJ open
2026; 16 (5): e118728
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Abstract
Acute pain is an expected symptom for adolescents after outpatient surgery. In the USA, postoperative analgesic regimens frequently include prescription opioids. Increasing attention from clinicians, patients and other healthcare leaders has been directed toward non-opioid strategies, such as combining non-steroidal anti-inflammatory drugs (NSAIDs) plus acetaminophen, as potential first-line options for managing postoperative pain. However, the effectiveness and safety of home regimens that include versus exclude opioids for adolescents are unclear. The Comparing Analgesic Regimen Effectiveness and Safety after surgery for Kids study evaluates the effectiveness and safety of NSAIDs plus acetaminophen alone (NSAID regimen) versus NSAIDs and acetaminophen plus a low-dose opioid regimen (opioid regimen).This study is a pragmatic, multicentre randomised controlled clinical trial recruiting 900 patients aged 12-20 years undergoing three common outpatient surgeries (tonsillectomy, laparoscopic cholecystectomy, knee arthroscopy) across four health systems. We will recruit patients prior to surgery and individuals will be randomised 1:1 with stratification to receive prescriptions for either the NSAID regimen or the opioid regimen. The primary effectiveness outcome is patient-reported pain intensity, while the primary safety outcome is adverse medication-related symptoms both assessed over the first 2 weeks after surgery. Secondary outcomes include quality of recovery, healthcare-related quality of life and rates of problematic substance use and chronic prescription opioid use, assessed up to 1 year after surgery.The study incorporates stakeholder collaboration, including patient partners, surgeons, professional organisations., and health insurance payors, to ensure ethical conduct and relevance. This study is overseen by a single institutional review board with certificate of confidentiality. Findings will be disseminated through academic publications, conferences and community outreach to inform patients, parents, surgical teams and policymakers about optimal pain management strategies for adolescents after surgery.NCT06671002.
View details for DOI 10.1136/bmjopen-2026-118728
View details for PubMedID 42208996
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Association of Surgical Antibiotic Prophylaxis with Postoperative Outcomes Following Pediatric Gastrostomy Tube Placement: A Propensity Score Overlap Weighted Analysis.
Journal of pediatric surgery
2026: 163152
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Abstract
BACKGROUND: Surgical antimicrobial prophylaxis (SAP) before gastrostomy tube placement is supported by guidelines but evidence regarding its efficacy in preventing surgical site infections (SSIs) in children is conflicting and largely extrapolated from adult data. This study aims to analyze the association between SAP and postoperative outcomes in children undergoing G-Tube placement.METHODS: We conducted a retrospective multicenter cohort study using the ACS NSQIP-Pediatric database (2021-2024) to identify children undergoing gastrostomy tube insertion. Patients with contaminated/dirty wound classifications or concurrent surgeries were excluded. The primary exposure was preoperative SAP, and propensity score overlap weighting was utilized to balance covariates like race, age, and ASA classification to estimate the association between SAP and 30-day SSI, unplanned readmission, and reoperation. Associations after overlap weighting were reported as adjusted odds ratio (AOR) while baseline comparisons were done using Wilcoxon rank sum test, Chi-squared test and Fisher's exact test as appropriate. A p value of less than 0.05 was considered significant.RESULTS: A total of 14,109 patients were included (mean age 2.7 ± 4.0 years), of whom 13,408 (95.0%) received SAP and 701 (5.0%) did not. Cefazolin was the most common agent (94.7%). White (8,246, 58%) was the most common race, though significant baseline differences existed in race/ethnicity between the SAP and no-SAP groups (p < 0.001). Unadjusted 30-day SSI rates were 4.7% for the SAP group and 4.4% for the no-SAP group (p = 0.8). In the weighted analysis, SAP was not associated with a reduction in SSIs (AOR 1.01, 95% CI 0.69-1.46), unplanned readmissions (AOR 0.93, 95% CI 0.70-1.22), or reoperations (AOR 0.78; 95% CI 0.48-1.27). Sub-analysis stratified by risk profile further confirmed no statistically significant benefit from prophylaxis in reducing infectious complications.CONCLUSIONS: Routine surgical antibiotic prophylaxis appears not to be associated with improved short-term outcomes or reduced infection rates following pediatric gastrostomy tube placement. These findings support reevaluation of institutional protocols to potentially reduce unnecessary antibiotic exposure without compromising patient safety.
View details for DOI 10.1016/j.jpedsurg.2026.163152
View details for PubMedID 41999972
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Optimizing Resource Utilization in Low- and Middle-Income Country NICUs: A Clinical Audit of Surgical Infection Screening Practices at a High-Volume NICU in Pakistan.
Pakistan journal of medical sciences
2026; 42 (411AASC): S21-S27
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Abstract
Post operative sepsis in neonates is a serious problem that may be challenging to diagnose. It is standard practice at our Neonatal Intensive Care Unit (NICU) in Pakistan to perform routine Blood Cultures (BLCS) and C-Reactive Protein (CRP) to screen for post-operative sepsis. We aimed to review this practice to investigate its effectiveness at screening for post-operative sepsis.All neonates admitted to the NICU post-operatively at our center from 2017-2022 were included. Relevant clinical and demographic data were collected. The sensitivity of BLCS was calculated for each post-operative day (POD) and an ROC curve was constructed for overall CRP values to quantify their screening value.A total of 109 post-operative neonates were included (median gestational age 37 weeks, birth weight 2.4kg). Thirteen (12.6%) developed sepsis. Only two patients had pathological microbe growth on POD 0 or 1, both having growth preoperatively. BLCS sensitivity increased significantly after POD 2. CRP performed poorly at discriminating post-operative sepsis (AUROC=0.55).Routine BLCS performed immediately after surgery did not predict the onset of post-operative sepsis. CRP performed poorly at discriminating post-operative sepsis, likely due to physiologic inflammation in post-operative neonates. Unnecessary screening tests represent a significant financial burden in LMICs, with little clear clinical benefit.
View details for DOI 10.12669/pjms.42.(11AASC).15734
View details for PubMedID 42136778
View details for PubMedCentralID PMC13169989
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A national database study of adjuvant steroids following Kasai portoenterostomy for biliary atresia.
Pediatric surgery international
2026; 42 (1)
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Abstract
Adjuvant steroids in the treatment of BA remains controversial. We sought to characterize variations in steroid use and their effect on postoperative outcomes in a multi-institutional cohort of BA patients.PHIS was queried for all patients between 2017 and 2024 who were diagnosed with BA and underwent KPE. Patients who received ≥ 3 contiguous days of steroids within 7 days of KPE were considered to have received postoperative steroids. The primary outcome was native liver survival, calculated using Kaplan-Meier analysis.504 patients from 37 hospitals with a median age of 52 days (IQR: 35-69 days) met inclusion criteria. 139 patients (28.6%) received adjuvant steroids. The steroid-treated cohort had a significantly longer postoperative LOS (P < 0.001) and high-volume-KPE hospitals were significantly more likely to use adjuvant steroids (P < 0.001). The majority of patients were started on steroids on POD#0. 5 hospitals utilized steroids in > 50% of their patients after KPE. Kaplan-Meier analysis showed no difference in two-year native liver survival.In this large multi-institutional cohort study, steroids were used early, with significant intra-hospital variation, and were associated with increased postoperative LOS and higher KPE volume. Larger multi-institutional studies with standardized steroid dosage regimens and extended long-term follow up are needed.III.
View details for DOI 10.1007/s00383-026-06401-x
View details for PubMedID 41865321
View details for PubMedCentralID 4303045
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Outcomes Following Adoption and Integration of Robotic-Assisted Cholecystectomy for Pediatric Biliary Tract Disease: An Eight-Year, Single-Center Experience.
Journal of pediatric surgery
2026: 163029
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Abstract
The incidence of pediatric gallstone disease continues to rise, largely driven by increasing obesity rates. Laparoscopic cholecystectomy (LC) has been the standard surgical approach, with robotic-assisted cholecystectomy (RAC) utilized less frequently. This study aimed to evaluate the implementation of RAC and its outcomes compared to LC at a single institution.A retrospective cohort study was conducted of all pediatric cholecystectomies at our children's hospital from 2017 through 2024. Surgical outcomes were abstracted. Statistical tests were employed, with p<0.05 considered significant.During the study, 420 cholecystectomies were performed: 196 LC and 224 RAC. Median age was 15.5 years, median BMI was 28.1 kg/m2, and 75% of patients were female. The most common diagnoses were choledocholithiasis (179) and symptomatic cholelithiasis (135). Yearly cholecystectomies increased. LC was performed more often for urgent cases (p<0.01). RAC was used more often in patients with obesity and severe obesity (p=0.01). Median operative time slightly differed between LC and RAC (11 minutes; p<0.01). There was one conversion to open (LC) and nine retained common duct stones. There was no difference in emergency department revisits (7.7% LC vs 6.7% RAC; p=0.69) or readmissions (2.6% LC vs 3.1% RAC; p=0.73). There were no bile leaks, common bile duct injuries or mortalities.In this largest reported cohort of pediatric RAC, RAC was found to be safe and effective compared with LC, particularly in pediatric patients with obesity. RAC can be integrated into practice without compromising patient safety. Further research evaluating educational and fiscal aspects of RAC is ongoing.
View details for DOI 10.1016/j.jpedsurg.2026.163029
View details for PubMedID 41722679
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Outcomes of robotic-assisted soave pull-through procedure for Hirschsprung disease: a systematic review and meta-analysis.
Journal of robotic surgery
2026; 20 (1): 221
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Abstract
Pull-through procedures remain the mainstay of treatment for Hirschsprung disease (HD). While laparoscopic-assisted procedures are widely performed, robotic-assisted Soave pull-through (RSPT) has emerged as a minimally invasive alternative with potential technical advantages. We systematically reviewed the available literature to evaluate the perioperative and functional outcomes of RSPT. PubMed, Embase, Scopus, Cochrane CENTRAL, and ClinicalTrials.gov were systematically searched through February 2025. Eligible studies included pediatric (< 18 years) patients undergoing RSPT. Data were pooled using random-effects models with two heterogeneity estimators to ensure robustness given the small number of included studies. Heterogeneity was assessed using I2 and τ² statistics. Primary outcomes included operative time, console time, intraoperative blood loss, and length of stay (LOS). Secondary outcomes included constipation, enterocolitis, and soiling. Study quality was assessed using the National Institutes of Health (NIH) Quality Assessment Tool. Six retrospective studies comprising 282 patients were included. Pooled mean operative and console times were 192.2 min (95% CI: 95.2-388.0) and 105.6 min (95% CI: 34.7-321.5), respectively. Mean intraoperative blood loss was 9.8 mL (95% CI: 1.9-49.4), and pooled postoperative LOS was 6.5 days (95% CI: 4.6-9.1). No difference in estimates was observed by estimator models. Postoperative complications were typically mild, manageable conservatively, and improved over time. RSPT appears to be a feasible minimally invasive option for HD, demonstrating low blood loss, short hospital stay, and acceptable functional outcomes, albeit with longer operative times which reflect logistical rather than technical inefficiency. Future adequately powered, higher quality, multicenter trials with standardized outcomes are needed to better define its role relative to established laparoscopic approaches.
View details for DOI 10.1007/s11701-026-03170-6
View details for PubMedID 41639487
View details for PubMedCentralID 7066788
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Characteristics of high-impact research in simulation-based education for surgical technical skills: a bibliometric analysis of the 100 most-cited articles
GLOBAL SURGICAL EDUCATION - JOURNAL OF THE ASSOCIATION FOR SURGICAL EDUCATION
2026; 5 (1)
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View details for DOI 10.1007/s44186-025-00447-6
View details for Web of Science ID 001668923100006
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Patch Repair Versus Flap Repair for Congenital Diaphragmatic Hernia: A Systematic Review and Meta-Analysis.
Journal of pediatric surgery
2026: 162919
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Abstract
Congenital diaphragmatic hernia (CDH) often requires non-primary repair of large defects using either a prosthetic patch or an autologous muscle flap. However, their comparative effectiveness remains uncertain. We systematically reviewed the existing literature to synthesize outcomes relevant to durability and perioperative safety of patch versus flap repair in neonates.PubMed, Embase, and Scopus were systematically searched from inception to May 2025 for pediatric studies directly comparing patch versus flap repair for CDH in neonates. Meta-analyses were performed using random-effects models on RevMan v5.4.1. Risk of bias was assessed using the ROBINS-I tool.Ten single-center retrospective cohorts comprising a total of 450 patients (Patch Repair: 220, Flap Repair: 230) who underwent CDH repair were included in our synthesis. Patch repair was associated with an increased risk of hernia recurrence (RR: 3.57 [95% CI: 1.47-8.69]), postoperative bleeding complications (RR: 2.15 [95% CI: 1.09-4.24]), and in-hospital mortality (RR: 1.66 [95% CI: 1.13-2.43]). No statistically significant differences were detected in the rates of chest wall deformities, scoliosis, bowel obstruction, ventral incisional hernia, operative time, or hospital length of stay. However, the overall certainty of evidence was very low across most outcomes, reflecting the retrospective designs, small sample sizes, and inconsistent follow-up/definitions.Within low-certainty evidence, patch repair was associated with higher observed hernia recurrence. Data on postoperative bleeding and mortality, including among on-ECMO repairs, were limited and insufficient to support causal inference. Definitive guidance will require prospective multicenter studies using standardized techniques, adjudicated bleeding endpoints, and long-term surveillance.
View details for DOI 10.1016/j.jpedsurg.2026.162919
View details for PubMedID 41539378
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Antibiotic prophylaxis in pediatric surgery: when more is not better-or safer.
Pediatric surgery international
2026; 42 (1): 65
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Abstract
Antibiotic resistance is a major public health concern. While surgical antibiotic prophylaxis (SAP) reduces surgical site infections (SSIs), inappropriate use may cause harm. This study evaluates the impact of SAP appropriateness and compares beta-lactam versus non-beta-lactam antibiotic use in pediatric surgery.A retrospective cohort analysis was conducted using ACS NSQIP Pediatric data (2021-2023). Exclusions included preexisting infections, malignancy, immunodeficiencies, and emergent surgeries. SAP appropriateness was classified according to NSQIP guidelines. Logistic regression assessed association between SAP categories and postoperative infections, presented as odds ratios (ORs) and 95% confidence intervals (CIs).Of 189,111 patients, 87.5% received SAP, 10.2% were overtreated, and 3.9% undertreated. SSIs occurred in 1.9%. Compared to appropriate use, undertreatment was associated with higher odds of SSI (OR: 1.4; 95% CI: 1.2-1.7), sepsis (1.6; 1.1-2.2), C. difficile colitis (2.5; 1.2-5.5), and UTI (1.8; 1.2-2.5). Overtreatment was linked to lower odds of UTI (0.7; 0.5-0.8). Non-beta-lactam antibiotics had higher odds of pneumonia (1.4; 1.0-2.0; p = 0.047) compared to beta-lactam antibiotics.Appropriate SAP is crucial in minimizing postoperative infections. These results underscore the importance of antibiotic selection among pediatric surgical patients.
View details for DOI 10.1007/s00383-025-06292-4
View details for PubMedID 41521361
View details for PubMedCentralID 8225033
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Assessing the Value of Overnight Admission After Pediatric Laparoscopic Cholecystectomy: A Nationwide Propensity-Matched Analysis.
Journal of pediatric surgery
2025: 162870
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Abstract
In an era of constrained healthcare resources, optimizing postoperative care without compromising safety has become a national priority. Laparoscopic cholecystectomy (LC) is among the most common pediatric procedures, yet discharge practices vary widely. Whether overnight admission offers meaningful benefit over same-day discharge remains uncertain.Children (<18 years) undergoing LC from 2017-2023 were identified in the American College of Surgeons National Surgical Quality Improvement Program-Pediatric (NSQIP-P) participant use file. Patients were classified by discharge timing (same-day vs overnight). Propensity score matching (1:1) balanced demographic, clinical, and operative factors. The primary outcome was 30-day unplanned readmission; secondary outcomes included reintervention and postoperative complications.Among 15,809 patients, 11,969 (76%) were discharged the same day. After matching (n = 1,725/group), same-day discharge was associated with lower odds of unplanned readmission (aOR 0.56, 95% CI 0.38-0.80) and reintervention (aOR 0.16, 95% CI 0.05-0.41). Absolute event rates were lower for readmissions (2.7% vs 4.7%, p=0.002) and reinterventions (0.2% vs 1.4%, p<0.001) in the same-day group. Notably, 96% of readmissions occurred after 24 hours and were for transient postoperative concerns unlikely to be prevented by inpatient observation. In an exploratory analysis of 2023 cases, opioid prescription at discharge was independently associated with increased readmission risk (aOR 1.97, 95% CI 1.00-3.78).Same-day discharge after pediatric LC is common, safe, and resource-efficient. Overnight admission adds minimal safety benefit while consuming limited inpatient capacity. These findings support broader adoption of standardized same-day discharge pathways to promote responsible resource stewardship in pediatric surgical care.Retrospective Cohort Study LEVEL OF EVIDENCE: III.
View details for DOI 10.1016/j.jpedsurg.2025.162870
View details for PubMedID 41397633