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Observational Study
. 2014 Mar;42(3):664-74.
doi: 10.1097/01.ccm.0000435668.53188.80.

Serum biomarkers of brain injury to classify outcome after pediatric cardiac arrest*

Ericka L Fink  1 , Rachel P Berger, Robert S B Clark, Robert S Watson, Derek C Angus, Rudolph Richichi, Ashok Panigrahy, Clifton W Callaway, Michael J Bell, Patrick M Kochanek
Affiliations
Observational Study

Serum biomarkers of brain injury to classify outcome after pediatric cardiac arrest*

Ericka L Fink et al. Crit Care Med. 2014 Mar.

Abstract

Objectives: Morbidity and mortality in children with cardiac arrest largely result from neurologic injury. Serum biomarkers of brain injury can potentially measure injury to neurons (neuron-specific enolase), astrocytes (S100b), and axons (myelin basic protein). We hypothesized that serum biomarkers can be used to classify outcome from pediatric cardiac arrest.

Design: Prospective observational study.

Setting: Single tertiary pediatric hospital.

Patients: Forty-three children with cardiac arrest.

Interventions: None.

Measurements and main results: We measured serum neuron-specific enolase, S100b, and myelin basic protein on days 1-4 and 7 after cardiac arrest. We recorded demographics, details of the cardiac arrest and resuscitation, and Pediatric Cerebral Performance Category at hospital discharge and 6 months. We analyzed the association of biomarker levels at 24, 48, and 72 hours with favorable (Pediatric Cerebral Performance Category 1-3) or unfavorable (Pediatric Cerebral Performance Category 4-6) outcome and mortality. Forty-three children (49% female; mean age of 5.9 ± 6.3) were enrolled and 17 (40%) died. Serum S100b concentrations peaked earliest, followed by neuron-specific enolase and finally myelin basic protein. Serum neuron-specific enolase and S100b concentrations were increased in the unfavorable versus favorable outcome group and in subjects who died at all time points (all p < 0.05). Serum myelin basic protein at 24 and 72 hours correctly classified survival but not good versus poor outcome. Using best specificity, serum S100b and neuron-specific enolase had optimal positive and negative predictive values at 24 hours to classify both favorable versus unfavorable outcome and survival, whereas serum myelin basic protein's best accuracy occurred at 48 hours. Receiver operator curves for serum S100b and neuron-specific enolase to classify favorable versus unfavorable outcome at 6 months were superior to clinical variables.

Conclusions: Preliminary data show that serum S100b, neuron-specific enolase, and myelin basic protein may aid in outcome classification of children surviving cardiac arrest.

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Figures

Figure 1
Figure 1
Study flowchart.
Figures 2
Figures 2
a–b. Time to peak serum NSE, S100, and MBP concentration by good vs. poor outcome and mortality at 6 months.
Figures 2
Figures 2
a–b. Time to peak serum NSE, S100, and MBP concentration by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figures 3
Figures 3
a–f. Serum NSE, S100, and MBP concentrations over the study period by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
Figure 4
Figure 4
a–l. Receiver operating characteristic curves for serum and clinical variables by good vs. poor outcome and mortality at 6 months.
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