Postoperative Hematocrit and Adverse Outcomes in Pediatric Cardiac Surgery Patients: A Cross-Sectional Study From the Society of Thoracic Surgeons and Congenital Cardiac Anesthesia Society Database Collaboration.

BACKGROUND: We sought to examine potential associations between pediatric postcardiac surgical hematocrit values and postoperative complications or mortality. METHODS: A retrospective, cross-sectional study from the Society of Thoracic Surgeons Congenital Heart Surgery Database (STS-CHSD) and Congenital Cardiac Anesthesia Society Database Module (2014-2019) was completed. Multivariable logistic regression models, adjusting for covariates in the STS-CHSD mortality risk model, were used to assess the relationship between postoperative hematocrit and the primary outcomes of operative mortality or any major complication. Hematocrit was assessed as a continuous variable using linear splines to account for nonlinear relationships with outcomes. Operations after which the oxygen saturation is typically observed to be <92% were classified as cyanotic and ≥92% as acyanotic. RESULTS: In total, 27,462 index operations were included, with 4909 (17.9%) being cyanotic and 22,553 (82.1%) acyanotic. For cyanotic patients, each 5% incremental increase in hematocrit over 42% was associated with a 1.31-fold (95% confidence interval [CI], 1.10-1.55; P = .003) increase in the odds of operative mortality and a 1.22-fold (95% CI, 1.10-1.36; P < .001) increase in the odds of a major complication. For acyanotic patients, each 5% incremental increase in hematocrit >38% was associated with a 1.45-fold (95% CI, 1.28-1.65; P < .001) increase in the odds of operative mortality and a 1.21-fold (95% CI, 1.14-1.29; P < .001) increase in the odds of a major complication. CONCLUSIONS: High hematocrit on arrival to the intensive care unit (ICU) is associated with increased operative mortality and major complications in pediatric patients following cardiac surgery.

Admission Criteria for Children With Obstructive Sleep Apnea After Adenotonsillectomy: Considerations for Cost.

STUDY OBJECTIVES: Postoperative respiratory complications (PRCs) are common among children with obstructive sleep apnea (OSA) after adenotonsillectomy. We analyzed postoperative admission guidelines to determine which optimally balanced patient safety and cost. METHODS: Retrospective study of children aged 12 years or younger undergoing adenotonsillectomy for OSA after polysomnography at a tertiary academic care center over 2 years. Demographics, medical History, and hospital course were collected. Advanced Excel modeling was used to assess the number of children with PRCs identified with guideline admission criteria and to validate the significance of these findings in our patient population with logistic regression. RESULTS: Six hundred thirty children were included; 116 had documented PRCs. Children with PRCs were younger (P = .024) and more frequently male (P = .012). There were no significant differences in race (P = .411) or obesity (P = .265). More children with PRCs had an apnea-hypopnea index (AHI) > 24 events/h (P < .001). Following guidelines from the American Academy of Pediatrics, American Academy of Otolaryngology - Head and Neck Surgery, and Nationwide Children's Hospital, 82%, 87%, and 99% of children with PRCs would be identified, costing $535,962, $647,165, and $1,053,694 for admission, respectively. Using a non-validated, forced model to refine predictors described in published guidelines, our model would have identified 95% of children with one or more PRCs, with a moderate cost. CONCLUSIONS: Current admission guidelines attempt to identify children with OSA at high risk for PRCs after adenotonsillectomy; however, none consider the economic cost to the health care system. We present a comparison of the number of patients identified with PRCs after adenotonsillectomy and the cost of expected admissions using currently published guidelines. COMMENTARY: A commentary on this article appears in this issue on page 1371.

Perioperative hypothermia in neonatal intensive care unit patients: effectiveness of a thermoregulation intervention and associated risk factors.

BACKGROUND: Hypothermia in neonatal intensive care unit patients is associated with morbidity. Perioperative normothermia is the standard of care. AIMS: We hypothesized that a quality improvement intervention (transport protocol, transport education, ongoing monitoring) would decrease the incidence of perioperative hypothermia. Secondarily, we hypothesized that patients undergoing surgery at a postmenstrual age of <37 weeks or at a weight of <1.5 kg would be at higher risk for perioperative hypothermia. METHODS: Lean Six Sigma methodology was used to institute a quality improvement intervention. In a retrospective chart review, we identified 708 cases for which the neonatal intensive care unit was the preoperative and postoperative destination and documented patient characteristics, including postoperative temperature. Cardiac surgical cases and cases with no postoperative temperature record were excluded. RESULTS: Patients in the postintervention group had a statistically significant decrease in hypothermia compared to those in the preintervention group (P < 0.001; OR: 0.17; 95% CI: 0.09-0.31). The absolute risk of hypothermia was 23% in the preintervention group and 6% in the postintervention group. Weight <1.5 kg on day of surgery (P = 0.45; OR: 0.63; 95% CI: 0.16-2.24) and postmenstrual age (P = 0.91; OR: 1.07; 95% CI: 0.33-3.98) were not risk factors. Odds of hypothermia were increased in patients undergoing interventional cardiology procedures (P = 0.003; OR: 17.77; 95% CI: 2.07-125.7). CONCLUSIONS: Perioperative hypothermia is a challenge in the care of neonatal intensive care unit patients; however, a thermoregulation intervention can decrease the incidence with sustained results. Future studies can examine why certain procedures have a tendency toward increased perioperative hypothermia, determine the relative value of quality improvement interventions, and characterize the morbidity and mortality associated with perioperative hypothermia in neonatal intensive care unit patients.