Transcutaneous Carbon Dioxide Monitoring During Apnea Testing for Determination of Neurologic Death in Children: A Retrospective Case Series.

OBJECTIVES: Determination of neurologic death in children is a clinical diagnosis based on absence of neurologic function with irreversible coma and apnea. Apnea testing during determination of neurologic death assesses spontaneous respiration when PaCO2 increases to greater than or equal to 60 and greater than or equal to 20 mm Hg above pre-apneic baseline. The utility of transcutaneous carbon dioxide measurements during apnea testing in children is unknown. We seek to determine the degree of correlation between paired transcutaneous carbon dioxide and PaCO2 values during apnea testing for determination of neurologic death. DESIGN: Single-center, retrospective case series. SETTING: Twenty-eight bed PICU in a 259-bed, tertiary care, referral center. PATIENTS: Children 0-18 years old undergoing determination of neurologic death between May 2017 and December 2018. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Primary outcomes were paired transcutaneous carbon dioxide and PaCO2 values obtained during determination of neurologic death. Primary analyses included Pearson correlation coefficient, Bland-Altman bias and limits of agreement, and comparative statistics. Descriptive data included demographics, admission diagnoses, hemodynamics, Vasoactive Inotropic Scores, and arterial blood gas measurement. Eight children underwent 15 determination of neurologic death examinations resulting in 31 paired transcutaneous carbon dioxide and PaCO2 values for study. Transcutaneous carbon dioxide and PaCO2 correlated well (r = 0.94; p < 0.01). Bias between transcutaneous carbon dioxide and PaCO2 was -3.29 ± 7.14 mm Hg. Differences in means did not correlate with Vasoactive Inotropic Score (r = 0.2) or patient temperature (r = 0.11). Receiver operator characteristic curve of transcutaneous carbon dioxide after 3-10 minutes of apnea to discriminate positive apnea testing by the standard of PaCO2 yielded an area under the curve of 0.91 and threshold of greater than or equal to 64 mm Hg (sensitivity, 91.7%; specificity, 100%; positive predictive value, 100%; negative predictive value, 92.3%; accuracy, 95.9%). CONCLUSIONS: During apnea testing for determination of neurologic death in children, noninvasive transcutaneous carbon dioxide monitoring demonstrated high correlation, accuracy, and minimal bias when compared with PaCO2. Further validation is required before any recommendation to replace PaCO2 with noninvasive transcutaneous carbon dioxide monitoring can be proposed. However, concurrent transcutaneous carbon dioxide data may limit unnecessary apnea time and associated hemodynamic instability or respiratory decompensation by approximating goal arterial blood sampling to document target PaCO2.

Primary palliative care: Skills for all clinicians.

The number of children with life-threatening and life-limiting conditions is increasing, requiring an individualized approach and additional supportive care. The American Academy of Pediatrics has called for pediatric palliative care to be available to all children who would benefit.1,2 High quality pediatric palliative care is essential for these children. Collaborative team-based methods focused on improving quality of life have shown to improve outcomes in physical, emotional, and cognitive domains.3 Palliative care involvement at the time of diagnosis rather than just at the end of life has moved coordinated care upstream. All clinicians can and should deliver palliative care. The Joint Commission recommends having patient-centered palliative care services available for children, and the Centers for Medicare and Medicaid Services is reimbursing clinicians for this coordinated care. This article details how all pediatric clinicians can positively influence the care of seriously ill children by incorporating palliative care principles into their daily care, resulting in better outcomes for their patients and families.

Protein synthesis inhibition as a potential strategy for metabolic down-regulation.

OBJECTIVE: This pilot study tested the potential of puromycin (PUR) to inhibit protein synthesis and reduce oxygen utilization in a non-hibernating, whole animal preparation. METHODS: After anesthesia and instrumentation, male rats received a single dose of PUR or 0.9% saline (control), followed 60 min later with [(35)S] methionine/cysteine radiolabeling. Thirty minutes after isotope injection, organ biopsies were taken for quantification of de novo protein synthesis. Arterial and central venous blood gases were obtained at baseline and 60 min after injection of PUR or 0.9% saline. Temperature, mean arterial pressure (MAP), and heart rate were recorded continuously. RESULTS: Animals receiving PUR demonstrated significant reductions in protein synthesis in all organ systems sampled (p<0.05). The overall reduction averaged 67.8%. Central venous oxygen saturations (S(cv)O(2)) were higher in the PUR group than the controls at 60 min (90+/-2% versus 80+/-4%, p<0.05). The oxygen extraction ratio (O(2)ER) decreased from 16.1+/-1.7% to 6.8+/-1.2% in the PUR group (p<0.05) and increased from 12.5+/-3.2% to 16.0+/-4.2% in the controls (p=0.44). There was no difference in temperature, MAP, heart rate or blood gas variables, other than S(cv)O(2), at baseline or 60 min between groups. CONCLUSIONS: These results demonstrate that PUR is capable of reducing whole body protein synthesis significantly within a relatively short duration of time. This appears to decrease whole body oxygen utilization as evidenced by an increase in S(cv)O(2) and a decrease in O(2)ER. Protein synthesis inhibition may reduce metabolic demands and should be tested for its potential to improve outcomes where oxygen demands exceed oxygen delivery.

Acute kidney failure: a pediatric experience over 20 years.

BACKGROUND: Acute kidney failure in children is a catastrophic, life-threatening event. OBJECTIVE: To compare and contrast 2 decades of data, analyzing the underlying causes, associated multiple organ system failures, outcome of dialysis procedures, and other variables of interest. DESIGN: Retrospective examination of clinical data collected between January 1, 1979, and December 31, 1998. SETTING: Regional health care center in the mid-Atlantic area. PARTICIPANTS: Two hundred twenty-eight patients, aged from 1 day to 18 years, had acute kidney failure and were referred to a pediatric nephrology service. MAIN OUTCOME MEASURES: Characteristics, percentage of mortality, intensive care unit admission, procedures, and other variables and causes of acute renal failure. RESULTS: The total number of cases analyzed represented 7% of all patients presented to the pediatric nephrology service. Sex distribution, ethnicity, and survival statistics were unchanged between both decades. The overall survival rate was 73%. One hundred fifty-four patients (68%) were admitted to the pediatric intensive care unit. The following 106 acute extracorporeal procedures were performed on 93 patients (41%): 12 patients received extracorporeal membrane oxygenation, 52 patients underwent peritoneal dialysis, 32 underwent hemodialysis, 3 patients received continuous venovenous hemofiltration, and 7 patients received continuous arteriovenous hemofiltration. Sepsis and burns, other leading causes of acute renal failure in the first decade, are replaced in the second decade by hematologic-oncologic complications and pulmonary failure. CONCLUSIONS: Acute kidney failure following repair of cardiac lesions remains unchanged as a leading risk factor of mortality in both decades. Three organ system failures were associated with more than a 50% mortality rate. Predialysis low serum albumin concentrations emerged as a significant copredictor of mortality.

Pediatric pain management education in medical students: impact of a web-based module.

OBJECTIVE: Reports from the Institute of Medicine and American Medical Association's Pain and Palliative Medicine Specialty Section Council emphasize the need for pain management education in medical schools, yet training in pediatric pain management (PPM) is limited. In this pilot program, we evaluated the effectiveness of a web-based PPM module on knowledge, confidence, attitudes, and self-reported skills in medical students. METHODS: Third- and fourth-year medical students (n = 291) completed the module and a knowledge test. Of these students, 53 completed a pre- and postsurvey of confidence, attitudes, and self-reported skills and module evaluation. RESULTS: For the 291 students, knowledge scores increased significantly by 21.8 points (95% confidence interval [CI] = 19.7-23.8; p<0.001). The majority of scores on the survey items significantly increased postmodule, including: increase in confidence in assessing pain in pediatric patients (6% to 25%; p = 0.004), increase in responses of "strongly disagree" or "disagree" to the belief that opioids will delay diagnosis (62% to 85%; p = 0.005), and increase in responses of "frequently" or "very frequently" to "how often do you use behavioral instruments to assess pain severity?" (35% to 57%; p = 0.008). The majority reported they intend to make changes in behavior or practice (71%), and would recommend the module to fellow students (88%). CONCLUSION: This pilot program supports the effectiveness of a web-based module in improving knowledge, confidence, attitudes, and self-reported skills in PPM. Evaluation responses indicate high-quality content. Further evaluation for sustained impact is warranted.