Accuracy of ultrasound-determined end-diastolic velocity of central retinal artery in diagnosing postoperative low cerebral perfusion pressure in patients with craniocerebral trauma / 中华麻醉学杂志

ABSTRACT

Objective To evaluate the accuracy of ultrasound-determined end-diastolic velocity (EDV) of central retinal artery (CRA) in diagnosing postoperative low cerebral perfusion pressure (CPP)in the patients with craniocerebral trauma.Methods Forty-nine patients of both sexes with brain injury,aged 18-64 yr,with body mass index of 18.5-23.9 kg/m2,were enrolled.The peak systolic velocity and EDV of CRA were determined using ultrasound at 1 day after operation.Mean arterial pressure and intracranial pressure were recorded,and CPP was calculated (CPP =mean arterial pressure-intracranial pressure).Results EDV was positively correlated with CPP (r =0.746,P＜0.01),and peak systolic velocity was not correlated with CPP (P＞0.05).The area under the receiver operating characteristic curve for EDV in diagnosing low CPP was 0.938 (95％ confidence interval 0.871-1.000),and the critical value was 3.205 (sensitivity 94.4％,specificity 76.9％).Conclusion Ultrasound-determined EDV of central retinal artery can accurately diagnose postoperative low CPP in the patients with craniocerebral trauma.