Short-Latency Positive Peak Following N20 Somatosensory Evoked Potential Is Superior to N20 in Predicting Neurologic Outcome After Out-of-Hospital Cardiac Arrest.

Abstract:

OBJECTIVES:The absence of N20 somatosensory evoked potential after cardiac arrest is related to poor outcome. However, discrimination between the low-amplitude and the absence of N20 is challenging. P25 and P30 are short-latency positive peaks with latencies between 25 and 30 ms following N20 (P25/30). P25/30 is evident even with an ambiguous N20 in patients with good outcome. Therefore, we evaluated the predictive value of P25/30 after cardiac arrest. DESIGN:A retrospective observational study. SETTING:University-affiliated hospital. SUBJECTS:Comatose survivors after out-of-hospital cardiac arrest treated by hypothermic targeted temperature management. INTERVENTION:None. MEASUREMENTS AND MAIN RESULTS:The specificity and the positive predictive value of P25/30 and N20 in predicting poor outcome were the same, showing a rate of 100%. The sensitivity of P25/30 in predicting poor outcome (90.12% [95% CI, 81.5-95.6%]) was higher than that of N20 (70.37% [95% CI, 59.2-80%]). Also, the negative predictive value of P25/30 in predicting poor outcome (81.4% [95% CI, 69.4-89.4%]) was higher than that of N20 (59.3% [95% CI, 51-67.1%]). The P25/30-based adjusted model showed a larger area under the curve (0.98 [95% CI, 0.95-1]) compared with the N20-based adjusted model (0.95 [95% CI, 0.91-0.98]) (p = 0.02). CONCLUSIONS:The absence of P25/30 is related to poor outcome with a higher sensitivity, negative predictive value than the absence of N20.

journal_name

Crit Care Med

journal_title

Critical care medicine

authors

Kim SW,Oh JS,Park J,Jeong HH,Kim JH,Wee JH,Oh SH,Choi SP,Park KN,Cerebral Resuscitation and Outcome evaluation Within catholic Network (CROWN) Investigators.

doi

10.1097/CCM.0000000000003083

subject

Has Abstract

pub_date

2018-06-01 00:00:00

pages

e545-e551

issue

6

eissn

0090-3493

issn

1530-0293

journal_volume

46

pub_type

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