Complication Timing, Failure to Rescue, and Readmission After Inpatient Pediatric Surgery.

BACKGROUND: Complications are associated with postoperative mortality and readmission. However, the timing of complications relative to discharge and the extent to which timing is associated with failure to rescue (FTR) and readmission after pediatric surgery is unknown. Our goal was to describe the timing of complications relative to discharge after inpatient pediatric surgery and determine the association between complication timing, FTR, and unplanned readmission. MATERIALS AND METHODS: National cohort study of patients within the NSQIP-Pediatric database who underwent inpatient surgery (2012-2019). Complications were categorized based on when they occurred relative to discharge: only pre-discharge, only post-discharge, both. The association between perioperative outcomes and the timing of postoperative complications was evaluated with multivariable hierarchical regression. RESULTS: Among 378,551 patients, 30,213 (8.0%) had at least one postoperative complication. Relative to patients with pre-discharge complications, post-discharge complications were associated with significantly decreased odds of FTR (odds ratio 0.21, 95% confidence interval [0.15-0.28]) and significantly increased odds of readmission (odds ratio 19.37 [17.93-20.92]). Odds of FTR and readmission in patients with complications occurring both before and after discharge were similar to that of patients with only post-discharge complications. CONCLUSIONS: FTR and readmission are associated with complications occurring at different times relative to discharge (FTR primarily pre-discharge; readmission primarily post-discharge). This suggests a 'one size fits all' approach to surgical quality improvement may not be effective and different approaches are needed to address different quality indicators.

Utility of Hospital Failure to Rescue for Analyzing Variation in Pediatric Postoperative Mortality.

OBJECTIVES: To evaluate the association between pediatric hospital performances in terms of failure to rescue (FTR), defined as postoperative mortality after a surgical complication, and mortality among patients without a surgical complication. DESIGN: Retrospective cohort study. SETTING: Forty-eight academic, pediatric hospitals; data obtained from Pediatric Health Information System database (Child Health Corporation of America, Shawnee Mission, KS) (2012-2020). PATIENTS: Children who underwent at least one of 57 high-risk operations associated with significant postoperative mortality. EXPOSURES: Hospitals were stratified into quintiles of reliability adjusted FTR (lower than average FTR in quintile 1 [Q1], higher than average FTR in quintile 5 [Q5]). Multivariable hierarchical regression was used to evaluate the association between hospital FTR performance and mortality among patients who did not have a surgical complication. MEASUREMENTS AND MAIN RESULTS: Among 203,242 children treated across 48 academic hospitals, the complication and overall postoperative mortality rates were 8.8% and 2.3%, respectively. Among patients who had a complication, the FTR rate was 8.8%. Among patients who did not have a complication, the mortality rate was 1.7%. There was a 6.5-fold increase in reliability adjusted FTR between the lowest and highest performing hospitals (lowest FTR hospital-2.7%; 95% CI [1.6-3.9]; highest FTR hospital-17.8% [16.8-18.8]). Complex chronic conditions were highly prevalent across hospitals (Q1, 72.7%; Q2, 73.8%; Q3, 72.2%; Q4, 74.0%; Q5, 74.8%; trend test p < 0.01). Relative to Q1 hospitals, the odds of mortality in the absence of a postoperative complication significantly increased by 33% at Q5 hospitals (odds ratio 1.33; 95% CI [1.07-1.66]). This association was consistent when limited to patients with a complex chronic condition and neonates. CONCLUSION: FTR may be a useful and valid surgical quality measure for pediatric surgery, even when considering patients without a postoperative complication. These findings suggest practices and processes for preventing FTR at high performing pediatric hospitals might help mitigate the risk of postoperative mortality even in the absence of a postoperative complication.

Hospital Variation in Mortality After Inpatient Pediatric Surgery.

OBJECTIVE: The aim was to determine the association between risk adjusted hospital perioperative mortality rates, postoperative complications, and failure to rescue (FTR) after inpatient pediatric surgery. BACKGROUND: FTR has been identified as a possible explanatory factor for hospital variation in perioperative mortality in adults. However, the extent to which this may be the case for hospitals that perform pediatric surgery is unclear. METHODS: The Pediatric Health Information System database (2012-2020) was used to identify patients who underwent one of 57 high-risk operations associated with significant perioperative mortality (n=203,242). Academic, pediatric hospitals (n=48) were stratified into quintiles based on risk adjusted inpatient mortality [lower than average, quintile 1 (Q1); higher than average, quintile 5 (Q5)]. Multivariable hierarchical regression was used to evaluate the association between hospital mortality rates, complications, and FTR. RESULTS: Inpatient mortality, complication, and FTR rates were 2.3%, 8.8%, and 8.8%, respectively. Among all patients who died after surgery, only 34.1% had a preceding complication (Q1, 36.1%; Q2, 31.5%; Q3, 34.7%; Q4, 35.7%; Q5, 32.2%; trend test, P =0.49). The rates of observed mortality significantly increased across hospital quintiles, but the difference was <1% (Q1, 1.9%; Q5; 2.6%; trend test, P <0.01). Relative to Q1 hospitals, the odds of complications were not significantly increased at Q5 hospitals [odds ratio (OR): 1.02 (0.87-1.20)]. By comparison, the odds of FTR was significantly increased at Q5 hospitals [OR: 1.60 (1.30-1.96)] with a dose-response relationship across hospital quintiles [Q2-OR: 0.99 (0.80-1.22); Q3-OR: 1.26 (1.03-1.55); Q4-OR: 1.33 (1.09-1.63)]. CONCLUSIONS: The minority of pediatric surgical deaths are preceded by a postoperative complication, but variation in risk adjusted mortality across academic, pediatric hospitals may be partially explained by differences in the recognition and management of postoperative complications. Additional work is needed to identify children at greatest risk of postoperative death from perioperative complications as opposed to those at risk from pre-existing chronic conditions.

Variation in Complications and Mortality According to Infant Diagnosis.

OBJECTIVE: Investigate patterns of infant perioperative mortality, describe the infant diagnoses with the highest mortality burden, and evaluate the association between types of postoperative complications and mortality in infants. BACKGROUND: The majority of mortality events in pediatric surgery occur among infants (ie, children <1 y old). However, there is limited data characterizing patterns of infant perioperative mortality and diagnoses that account for the highest proportion of mortality. METHODS: Infants who received inpatient surgery were identified in the National Surgical Quality Improvement Program-Pediatric database (2012-2019). Perioperative mortality was stratified into mortality associated with a complication or mortality without a complication. Complications were categorized as wound infection, systemic infection, pulmonary, central nervous system, renal, or cardiovascular. Multivariable logistic regression was used to evaluate the association between different complications and complicated mortality. RESULTS: Among 111,946 infants, the rate of complications and perioperative mortality was 10.4% and 1.6%, respectively. Mortality associated with a complication accounted for 38.8% of all perioperative mortality. Seven diagnoses accounted for the highest proportion of mortality events (40.3%): necrotizing enterocolitis (22.3%); congenital diaphragmatic hernia (7.3%); meconium peritonitis (3.8%); premature intestinal perforation (2.5%); tracheoesophageal fistula (1.8%); gastroschisis (1.4%); and volvulus (1.1%). Relative to wound complications, cardiovascular [odds ratio (OR): 19.4, 95% confidence interval (95% CI): 13.9-27.0], renal (OR: 6.88; 4.65-10.2), and central nervous system complications (OR: 6.50; 4.50-9.40) had the highest odds of mortality for all infants. CONCLUSIONS: A small subset of diagnoses account for 40% of all infant mortality and specific types of complications are associated with mortality. These data suggest targeted quality improvement initiatives could be implemented to reduce adverse surgical outcomes in infants.

Complications and Failure to Rescue After Inpatient Pediatric Surgery.

OBJECTIVE: To describe the frequency and patterns of postoperative complications and FTR after inpatient pediatric surgical procedures and to evaluate the association between number of complications and FTR. SUMMARY AND BACKGROUND: FTR, or a postoperative death after a complication, is currently a nationally endorsed quality measure for adults. Although it is a contributing factor to variation in mortality, relatively little is known about FTR after pediatric surgery. METHODS: Cohort study of 200,554 patients within the National Surgical Quality Improvement Program-Pediatric database (2012-2016) who underwent a high (≥ 1%) or low (< 1%) mortality risk inpatient surgical procedures. Patients were stratified based on number of postoperative complications (0, 1, 2, or ≥3) and further categorized as having undergone either a low- or high-risk procedure. The association between the number of postoperative complications and FTR was evaluated with multivariable logistic regression. RESULTS: Among patients who underwent a low- (89.4%) or high-risk (10.6%) procedures, 14.0% and 12.5% had at least 1 postoperative complication, respectively. FTR rates after low- and high-risk procedures demonstrated step-wise increases as the number of complications accrued (eg, low-risk- 9.2% in patients with ≥3 complications; high-risk-36.9% in patients with ≥ 3 complications). Relative to patients who had no complications, there was a dose-response relationship between mortality and the number of complications after low-risk [1 complication - odds ratio (OR) 3.34 (95% CI 2.62-4.27); 2 - OR 10.15 (95% CI 7.40-13.92); ≥3-27.48 (95% CI 19.06-39.62)] and high-risk operations [1 - OR 3.29 (2.61-4.16); 2-7.24 (5.14-10.19); ≥3-20.73 (12.62-34.04)]. CONCLUSIONS: There is a dose-response relationship between the number of postoperative complications after inpatient surgery and FTR, ever after common, "minor" surgical procedures. These findings suggest FTR may be a potential quality measure for pediatric surgical care.

Ileocolic intussusception in pediatric SARS-CoV-2 patients: experience at a tertiary pediatric center.

PURPOSE: COVID-19 disease can manifest with intussusception in pediatric patients, but prevalence of abnormalities on ultrasounds performed for intussusception is uncertain. We aim to report our experience in children with COVID-19 presenting with suspected intussusception imaged with ultrasound. METHODS: Children under 18 years who had an ultrasound for possible intussusception underwent retrospective analysis and were tested for COVID-19 between April 1 and December 14, 2020. Patients' demographic, clinical, radiological and surgical characteristics were reviewed. RESULTS: Twenty-four COVID-19-positive patients were identified; 19 boys with mean age 3 years (range: 3 months-18 years). Ultrasound was abnormal in 11 patients (11/24, 46%). Sonographic features of enterocolitis were documented in seven children (7/24, 29%). Three boys (3/24, 13%) were found to have ileocolic intussusception on ultrasound and underwent air enema with failed reduction (3/3, 100%), precipitating surgical reductions, all with favorable outcomes. One patient (1/24, 4%) was found to have a long segment of persistent small bowel-small bowel intussusception which was surgically repaired. CONCLUSION: Given the known association between failed reduction at air enema and delayed presentation, heightened awareness for intussusception in the setting of COVID-19 should be maintained, though more often, the etiology was attributed to other GI manifestations of COVID-19.

Failure to Rescue as a Surgical Quality Indicator: Current Concepts and Future Directions for Improving Surgical Outcomes.

Over the past decade, failure to rescue-defined as the death of a patient after one or more potentially treatable complications-has received increased attention as a surgical quality indicator. Failure to rescue is an appealing quality target because it implicitly accounts for the fact that postoperative complications may not always be preventable and is based on the premise that prompt recognition and treatment of complications is a critical, actionable point during a patient's postoperative course. Although numerous patient and macrosystem factors have been associated with failure to rescue, there is an increasing appreciation of the key role of microsystem factors. Although failure to rescue is believed to contribute to observed hospital-level variation in both surgical outcomes and costs, further work is needed to delineate the underlying patient-level and system-level factors preventing the timely identification and treatment of postoperative complications. Therefore, the goals of this narrative review are to provide a conceptual framework for understanding failure to rescue, to discuss various associated patient- and system-level factors, to delineate the reasons it has become recognized as an important quality indicator, and to propose future directions of scientific inquiry for developing effective interventions that can be broadly implemented to improve postoperative outcomes across all hospitals.

Do Ventriculoperitoneal Shunts Increase Complications After Laparoscopic Gastrostomy in Children?

BACKGROUND: In patients requiring gastrostomies, ventriculoperitoneal (VP) shunts are a frequently encountered comorbidity. The objective of this study is to evaluate the postoperative management of children with VP shunts that undergo laparoscopic gastrostomy placement and determine their incidence of complications. MATERIALS AND METHODS: Children 18 y old or younger who underwent laparoscopic gastrostomy placement at a freestanding academic children's hospital between January 2014 and October 2016 were reviewed. Data collected included demographics, management, and outcomes. Patients were compared based on their presence of a VP shunt before laparoscopic gastrostomy. Statistical analysis was performed using chi square, Fisher's exact, and Wilcoxon rank-sum tests. RESULTS: We reviewed the medical records of 270 children that underwent laparoscopic gastrostomy placement by 15 pediatric surgeons. Of these, 9% (25) had a previously placed VP shunt. In comparing patients with a VP shunt with those without a VP shunt, there was no significant difference in median age (4 versus 3 y, P = 0.92), gender (48% versus 51% males, P = 0.80), body mass index (15 versus 16, P = 0.69), preoperative diet (48% versus 47% nasogastric tube dependent, P = 0.60), or procedure time (43 versus 42 min, P = 0.37). The postoperative management of these children was similar: day of initiation of postoperative feeds (84% versus 73% on postoperative day #1, P = 0.70), method of initiation of feeds (60% versus 55% continuous, P = 0.25), and type of initial feeds (83% versus 71% Pedialyte, P = 0.24). Similarly, there was no difference in hospital length of stay, return to the emergency department, or postoperative complications within 90 d (P > 0.05). CONCLUSIONS: Children with ventriculoperitoneal shunts do not have a higher rate of immediate complications after laparoscopic gastrostomy placement and may be managed similar to other children in the postoperative period.

Single-Visit Surgery Offers Added Convenience and Excellent Family Satisfaction.

BACKGROUND: The traditional model for elective ambulatory surgical care includes three separate visits to the surgeon: an initial consultation, a second for outpatient surgery, and a third for postoperative follow-up. Single-Visit Surgery (SVS) is an alternative model of ambulatory surgical care that consolidates care into a single appointment where patients with straightforward surgical problems are evaluated in the morning and undergo a surgical procedure later that same afternoon. In April 2016, SVS was introduced at a tertiary-care freestanding children's hospital. Our objective for this study was to evaluate our early experience and conduct a survey of our patient's caregivers to evaluate their satisfaction with SVS. MATERIALS AND METHODS: We retrospectively reviewed the medical records of patients that were seen as part of SVS from April 2016 through December 2016. Data collected included demographics, diagnoses, procedures performed, clinical outcomes, and distance traveled to the hospital. In addition, adult caregivers of SVS patients were asked to participate in a telephone survey. RESULTS: There were 43 patients seen through SVS during the study period. The median age was 7 y. Of the 43 patients evaluated through SVS, 40 (93%) of them underwent surgery. Of the 40 patients that had surgery, 27 (68%) of the families participated in the telephone survey. Of those responding, 93% were strongly satisfied, and 7% were satisfied with the care through SVS. All families said they would recommend the SVS program to a friend. CONCLUSIONS: SVS is an alternative model of ambulatory surgical care that adds convenience to the patient experience and results in excellent family satisfaction.

Remote Patient Monitoring and Telemedicine in Neonatal and Pediatric Settings: Scoping Literature Review.

BACKGROUND: Telemedicine and telehealth solutions are emerging rapidly in health care and have the potential to decrease costs for insurers, providers, and patients in various settings. Pediatric populations that require specialty care are disadvantaged socially or economically or have chronic health conditions that will greatly benefit from results of studies utilizing telemedicine technologies. This paper examines the emerging trends in pediatric populations as part of a systematic literature review and provides a scoping review of the type, extent, and quantity of research available. OBJECTIVE: This paper aims to examine the role of remote patient monitoring (RPM) and telemedicine in neonatal and pediatric settings. Findings can be used to identify strengths, weaknesses, and gaps in the field. The identification of gaps will allow for interventions or research to improve health care quality and costs. METHODS: A systematic literature review is being conducted to gather an adequate amount of relevant research for telehealth in pediatric populations. The fields of RPM and telemedicine are not yet very well established by the health care services sector, and definitions vary across health care systems; thus, the terms are not always defined similarly throughout the literature. Three databases were scoped for information for this specific review, and 56 papers were included for review. RESULTS: Three major telemedicine trends emerged from the review of 45 relevant papers-RPM, teleconsultation, and monitoring patients within the hospital, but without contact-thus, decreasing the likelihood of infection or other adverse health effects. CONCLUSIONS: While the current telemedicine approaches show promise, limited studied conditions and small sample sizes affect generalizability, therefore, warranting further research. The information presented can inform health care providers of the most widely implemented, studied, and effective forms of telemedicine for patients and their families and the telemedicine initiatives that are most cost efficient for health systems. While the focus of this review is to summarize some telehealth applications in pediatrics, we have also presented research studies that can inform providers about the importance of data sharing of remote monitoring data between hospitals. Further reports will be developed to inform health systems as the systematic literature review continues.

Utility of pediatric female fertility preservation discussions following pelvic radiation.

INTRODUCTION: While many childhood cancers are curable with therapy, adverse consequences in fertility exist. We sought to assess the number of female patients with pelvic tumors receiving radiation therapy, and the proportion that undergo measures for fertility preservation (FP). METHODS: A total of 53 female patients treated with pelvic tumors from 2000 to 2016 were retrospectively identified. RESULTS: 19 (34%) of these patients underwent pelvic radiation therapy (pXRT). Three of the patients received pXRT for palliative treatment. Of the 19 female patients receiving pXRT, six (31%) were prepubertal and 13 (68%) were postpubertal. Three patients (16%) had documentation of a discussion of FP measures prior to pXRT. One was prepubertal and the others were post-pubertal. Six patients (32%) were evaluated by endocrinology after radiation therapy, diagnosed with ovarian failure, and placed on hormone therapy. Current guidelines recommend discussion of FP in pre-and postpubertal patients with cancer. This 16-year retrospective review of female patients that underwent pXRT for pelvic tumors demonstrated < 17% of patients have documentation of a discussion of FP measures. CONCLUSION: Female pediatric patients who underwent chemotherapy and pXRT suffer a high rate of premature ovarian failure, high morbidity and mortality as well as low rates of documented FP discussions. Based on these findings we have established a multi-disciplinary fertility preservation team available for consultation and a protocol for discussing and documenting the impact of pXRT, along with other treatments, on fertility. LEVEL OF EVIDENCE: III.

Computed Tomography Utilization for the Diagnosis of Acute Appendicitis in Children Decreases With a Diagnostic Algorithm.

OBJECTIVE: The primary objective of this project was to decrease computed tomography (CT) utilization for the diagnosis of appendicitis in an academic children's hospital emergency department (ED) through a multidisciplinary quality improvement initiative. BACKGROUND: Appendicitis is the most common abdominal diagnosis leading to the hospitalization of children in the United States. However, the diagnosis of appendicitis in children can be difficult and many centers rely heavily upon CT scans. Recent recommendations emphasize decreasing CT use among pediatric patients because of an increased lifetime risk of radiation-induced malignancies. METHODS: A retrospective review was conducted of patients diagnosed with appendicitis in the ED at Children's Mercy Hospital from January 1, 2011 to February 28, 2014 to establish a baseline cohort. From August 1, 2014 to July 31, 2015, a newly designed diagnostic algorithm was used in the ED and patients were prospectively followed. Any patient discharged from the ED received a follow-up phone call. Patients treated for appendicitis before and after pathway implementation were compared. In addition, any patient evaluated for appendicitis after implementation of the algorithm was analyzed for adherence to the clinical pathway. Differences between the 2 groups were analyzed using ANOVA, Wilcoxon Rank Sum, χ, and Fisher Exact tests. RESULTS: Of 840 patients seen after implementation of the diagnostic algorithm, 267 were diagnosed with appendicitis. After implementation of the algorithm, CT utilization decreased from 75.4% to 24.2% (P < 0.0001) in patients with appendicitis. CT utilization was 27.3% after implementation, regardless of the ultimate diagnosis or algorithm adherence. The diagnostic pathway had a sensitivity of 98.6% and specificity of 94.4%. CONCLUSIONS: Implementation of a diagnostic algorithm for appendicitis in children significantly decreases CT utilization, whereas maintaining a high sensitivity and specificity.

Evaluating the impact of a minimally invasive pediatric surgeon on hospital practice: comparison of two children's hospitals.

PURPOSE: Widespread adoption of minimally invasive surgery (MIS) techniques in pediatric surgery has progressed slowly, and the shift in practice patterns has been variable among surgeons. We hypothesized that a pediatric surgeon committed to MIS could effectively change surgical practice by creating an emphasis on MIS. METHODS: Annual case volumes from 2000 to 2009 at two tertiary care pediatric hospitals, one with a dedicated minimally invasive pediatric surgeon, were evaluated for trends in MIS for ten different operations. Univariate analyses of the differences between hospitals in the use of the open versus laparoscopic approach were performed. The Breslow-Day test was used to examine differences in use of laparoscopic procedures across hospitals in early versus middle and middle versus late time periods. RESULTS: Between the two hospitals, for 9 of the 10 types of surgery, the number of laparoscopic and open procedures differed significantly (p values ranged from <0.0001 to 0.003). Over the 10-year period, the hospital with a dedicated MIS surgeon had a larger proportion of procedures done laparoscopically for all years. This difference reached statistical significance for appendectomy (p < 0.0001), congenital diaphragmatic hernia (p < 0.0002), chest wall reconstruction (p < 0.0001), cholecystectomy (p = <0.0001), gastrostomy (p < 0.0001), nissen fundoplication (p < 0.0001) oophorectomy (p < 0.0001), pyloromyotomy (p < 0.0001) and splenectomy (p = 0.0006). After grouping the years into early (2000-2003), middle (2004-2006) and late (2007-2009) categories, the hospital with a dedicated MIS surgeon had a significantly higher rate of increase in use of laparoscopic surgery between the early and middle years for four procedures: diaphragmatic hernia repair (p = 0.003), chest wall reconstruction (p = 0.0086), cholecystectomy (0.0083) and endorectal pull-through (p = 0.025). CONCLUSION: The presence of a dedicated minimally invasive pediatric surgeon led to a significant change in surgical practice with an overall trend of increasing MIS several years in advance of a hospital that did not have a dedicated MIS surgeon. This has implications for resident training in academic medical centers and potential patient care outcomes.

Hospital Variation in Mortality and Failure to Rescue after Surgery for High-Risk Neonatal Diagnoses.

INTRODUCTION: A large proportion of postoperative mortality after pediatric surgery occurs among neonates with specific high-risk diagnoses. The extent to which there is hospital-level mortality variation among patients with these diagnoses and whether this variation is associated with differences in failure to rescue (FTR) is unclear. METHODS: The Pediatric Health Information System® database (2012-2020) was used to identify patients who underwent surgery for eight high-risk neonatal diagnoses: gastroschisis; volvulus; necrotizing enterocolitis; intestinal atresia; meconium peritonitis; tracheoesophageal fistula; congenital diaphragmatic hernia; and perinatal intestinal perforation. Hospitals were stratified into tertiles of reliability-adjusted inpatient mortality rates (lower than average mortality - tertile 1 [T1]; higher than average mortality - tertile 3 [T3]). Multivariable hierarchical regression was used to evaluate the association between hospital-level, reliability-adjusted mortality and FTR. RESULTS: Overall, 20,838 infants were identified across 48 academic, pediatric hospitals. Adjusted hospital mortality rates ranged from 4.0% (95% CI, 0.0-8.2) to 16.3% (12.2-20.4). Median case volume (range, 80-1,238) and number of NICU beds (range, 24-126) were not significantly different across hospital tertiles. Compared to the hospitals with the lowest postoperative mortality (T1), the odds of FTR were significantly higher in hospitals with the highest (T3) postoperative mortality (odds ratio 1.97 [1.50-2.59]). CONCLUSIONS: Significant variation in neonatal hospital mortality for high-risk diagnoses does not appear to be explained by hospital structural characteristics. Rather, difference in FTR suggests quality improvement interventions targeting early recognition and management of postoperative complications could improve surgical quality and safety for high-risk neonatal care.

The prevalence of Hirschsprung disease in premature infants after suction rectal biopsy.

BACKGROUND: The prevalence of Hirschsprung disease (HD) in the premature infant population is not well documented. However, delayed passage of stool is common in premature infants, and suction rectal biopsy (SRB) is often used to evaluate for HD in this population. The use of SRB is unknown. Therefore, we evaluated the role of SRB in premature infants with abnormal stooling patterns. METHODS: After Institutional Review Board approval, a retrospective study was conducted on all infants having an SRB performed to exclude HD from January 2000 to December 2010. Infants were divided into two groups according to gestational age (premature < 37 wk; term ≥ 37 wk). Demographics, diagnosis, treatments, and outcomes were collected. A subset analysis was performed on patients diagnosed with HD. RESULTS: Two hundred sixty-nine infants were identified (113 premature and 156 term). Six premature infants (5.3%) and 79 term infants (50.6%) were found to have HD (P < 0.01). As expected, gestational age was significantly different between groups (31.7 versus 38.9 wk, P < 0.01) (Table 1). Premature infants were less likely to have prenatal care (35% versus 55%, P < 0.01) and had longer lengths of hospital stay (45.6 versus 17.6 d, P < 0.01). The most common location of aganglionosis was rectosigmoid in both groups (group 1, 50%; group 2, 33%, P = 0.7). CONCLUSIONS: HD occurs significantly less often in premature infants than in term infants. Alternative diagnoses should be investigated in this population when delayed stooling patterns are encountered. SRB should be used more selectively in this group.

Association of Intercostal Nerve Cryoablation During Nuss Procedure With Complications and Costs.

BACKGROUND: Intercostal nerve cryoablation with the Nuss procedure has been shown to decrease opioid requirements and hospital length of stay; however, few studies have evaluated the impact on complications and hospital costs. METHODS: A retrospective cohort study was performed for all Nuss procedures at our institution from 2016 through 2020. Outcomes were compared across 4 pain modalities: cryoablation with standardized pain regimen (n = 98), patient-controlled analgesia (PCA; n = 96), epidural (n = 36), and PCA with peripheral nerve block (PNB; n = 35). Outcomes collected included length of stay, opioid use, variable direct costs, and postoperative complications. Univariate and multivariate hierarchical regression analysis was used to compare outcomes between the pain modalities. RESULTS: Cryoablation was associated with increased total hospital cost compared with PCA (cryoablation, $11 145; PCA, $8975; P < .01), but not when compared with epidural ($9678) or PCA with PNB ($10 303). The primary driver for increased costs was operating room supplies (PCA, $2741; epidural, $2767; PCA with PNB, $3157; and cryoablation, $5938; P < .01). With multivariate analysis, cryoablation was associated with decreased length of stay (-1.94; 95% CI, -2.30 to -1.57), opioid use during hospitalization (-3.54; 95% CI, -4.81 to -2.28), and urinary retention (0.13; 95% CI, 0.05-0.35). CONCLUSIONS: Cryoablation significantly reduces opioid requirements and length of stay relative to alternative modalities, but it was associated with an increase in total hospital costs relative to PCA, but not epidural or PCA with PNB. Cryoablation was not associated with allodynia or slipped bars requiring reoperation.

Embryonic mouse blood flow and oxygen correlate with early pancreatic differentiation.

The mammalian embryo represents a fundamental paradox in biology. Its location within the uterus, especially early during development when embryonic cardiovascular development and placental blood flow are not well-established, leads to an obligate hypoxic environment. Despite this hypoxia, the embryonic cells are able to undergo remarkable growth, morphogenesis, and differentiation. Recent evidence suggests that embryonic organ differentiation, including pancreatic ß-cells, is tightly regulated by oxygen levels. Since a major determinant of oxygen tension in mammalian embryos after implantation is embryonic blood flow, here we used a novel survivable in utero intracardiac injection technique to deliver a vascular tracer to living mouse embryos. Once injected, the embryonic heart could be visualized to continue contracting normally, thereby distributing the tracer specifically only to those regions where embryonic blood was flowing. We found that the embryonic pancreas early in development shows a remarkable paucity of blood flow and that the presence of blood flow correlates with the differentiation state of the developing pancreatic epithelial cells in the region of the blood flow.

Association between index complication and outcomes after inpatient pediatric surgery.

PURPOSE: A cascade of complications is believed to be the primary mechanism underlying failure to rescue (FTR), or death of a patient after a postoperative complication. It is unknown whether specific types of index complications are associated with the incidence of secondary complications and FTR after pediatric surgery. METHODS: National cohort study of patients within the National Surgical Quality Improvement Program-Pediatric database who underwent inpatient surgery (2012-2019). Index complications were grouped into nine categories (cardiovascular, venous thromboembolism, pulmonary, bleeding/transfusion, renal, central nervous system, wound, infectious, or minor [defined as having an associated mortality rate <1%]). The association between the type of index complication with FTR, secondary complications, reoperation, unplanned readmission, and postoperative length of stay was evaluated with multivariable logistic regression and generalized linear modeling. RESULTS: Among 425,386 patients, 15.5% had at least one complication, 16.6% had one or more secondary complications, 13.9% reoperation, 14.5% readmission, and 2.4% FTR.  Secondary complication (10.8-59.7%) and FTR (0.3-31.1%) rates varied by type of index complication. Relative to patients who had an index minor complication, those with an index infectious complication were most likely to have secondary complication (Odds Ratio [OR] 10.3, 95% CI [9.36-11.4]). Index CV complications were most strongly associated with FTR (OR 30.7 [24.0-39.4]). Index wound complications had the greatest association with reoperation (OR 21.9 [20.5-23.4]) and readmission (OR 18.7 [17.6-19.9]). Index pulmonary complications had the strongest association with length of stay (coefficient 9.39 [8.95-9.83]). CONCLUSIONS: Different types of index complications are associated with different perioperative outcomes. These data can help identify patients potentially at risk for suboptimal outcomes and can inform pediatric quality improvement interventions. TYPE OF STUDY: Cohort study. LEVEL OF EVIDENCE: Level II.