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Usefulness of Bilateral rSO2 Monitoring for Predicting Cerebral Hyperperfusion Syndrome after Carotid Artery Stenting Jun NIIMI 1,2 , Shoichiro ISHIHARA 3 , Eisuke TSUKAGOSHI 2 , Hiroaki NEKI 2 , Yoshiaki KAKEHI 2 , Nahoko UEMIYA 3 , Kouji MIZOKAMI 2 , Hideaki ISHIHARA 2 , Shinya KOHYAMA 2 , Fumitaka YAMANE 2 1Department of Neurosurgery, Funabashi Municipal Medical Center 2Department of Endovascular Neurosurgery, Saitama Medical University International Medical Center 3Department of Neurosurgery, Saitama Sekishinkai Hospital Keyword: carotid artery stenting , cerebral hyperperfusion syndrome , cerebral hyperperfusion phenomenon , near-infrared spectroscopy , regional saturation of oxygen , rSO2 pp.859-867
Published Date 2017/10/10
DOI https://doi.org/10.11477/mf.1436203608
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 OBJECTIVE:Cerebral hyperperfusion syndrome(CHS)and cerebral hyperperfusion phenomenon(CHP)induce intracranial hemorrhage and can become critical complications after carotid artery stenting(CAS). The purpose of the present study was to predict and avoid CHS after CAS using bilateral rSO2 intraoperative monitoring.

 METHODS:We retrospectively analyzed 100 consecutive patients who underwent CAS between January 2012 and May 2014 in our institution. We performed continuous bilateral rSO2 monitoring from anesthetic induction to the day following CAS. CHS was defined as the deterioration of neurological conditions post-CAS, no ischemic changes on post-CAS head CT or brain MRI, an increase in cerebral blood flow(CBF)and cerebral blood volume(CBV), and shortening of the mean transit time(MTT)or time to peak(TTP)on CT perfusion. To compare the CHS/CHP group and non-CHS/CHP group, we defined four parameters:rSO2 difference(rSO2 at the endpoint of the procedure−baseline rSO2), ΔrSO2 difference(affected side rSO2 difference−unaffected side rSO2 difference), rSO2 ratio(rSO2 at the endpoint of the procedure/baseline rSO2), and ΔrSO2 ratio(affected side rSO2 ratio/unaffected side rSO2 ratio).

 RESULTS:There were 2 CHS cases(2.2%)and 3 CHP cases(3.3%). In the CHS/CHP group, the ΔrSO2 difference and ΔrSO2 ratio were significantly higher than those in the non-CHS/CHP group(p value<0.05);however, no significant differences were found in the affected side rSO2 difference(p value=0.063)and affected side rSO2 ratio(p value=0.054)between the groups.

 CONCLUSION:We could promptly detect CHS and CHP in all cases by using continuous bilateral rSO2 monitoring and analysis of the ΔrSO2 difference and ΔrSO2 ratio.


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電子版ISSN 1882-1251 印刷版ISSN 0301-2603 医学書院

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