https://scholars.lib.ntu.edu.tw/handle/123456789/611806
標題: | Low frequency oscillations in cephalic vessels assessed by near infrared spectroscopy | 作者: | Phillip D. Schytz H.W. Selb J. Payne S. Iversen H.K. Skovgaard L.T. Boas D.A. Ashina M. STEPHEN JOHN PAYNE |
關鍵字: | oxyhemoglobin;adult;aged;arterial pressure;article;autoregulation;brain blood vessel;breathing;end tidal carbon dioxide tension;female;hemisphere;human;human experiment;low frequency oscillation;male;middle cerebral artery;near infrared spectroscopy;normal human;oscillation;priority journal;transcranial doppler;Adult;Aged;Arterial Pressure;Blood Flow Velocity;Cerebrovascular Circulation;Female;Homeostasis;Humans;Male;Middle Aged;Middle Cerebral Artery;Oxyhemoglobins;Respiration;Spectroscopy, Near-Infrared;Ultrasonography, Doppler, Transcranial | 公開日期: | 2012 | 卷: | 42 | 期: | 11 | 起(迄)頁: | 1180-1188 | 來源出版物: | European Journal of Clinical Investigation | 摘要: | Background and Methods Low frequency oscillations (LFO) of cerebral vessels are believed to reflect cerebral autoregulation. We investigated day-to-day and hemispheric variations in 0·1Hz LFO with near infrared spectroscopy (NIRS) and transcranial Doppler (TCD) to determine phase shift and gain of oxygenated haemoglobin (oxyHb) and the velocity of the middle cerebral artery (Vmca) to the arterial blood pressure (ABP). The direct left-right phase shifts of oxyHb and Vmca were also assessed. We examined 44 healthy volunteers by simultaneous recordings of ABP, oxyHb and Vmca during spontaneous and paced breathing at 6 breaths per minute on two separate days. Results The variation between hemispheres had a prediction interval (PI) of ±39° for ABP-oxyHb phase shift and ±69% for gain. ABP-Vmca showed ±57° PI phase shift and ±158% PI for gain. The variation from day to day showed ±61° PI for ABP-oxyHb phase shift and ±297% PI for gain. ABP-Vmca showed ±45° PI phase shift and ±166% PI for gain. We found a linear relation between phase shift of oxyHb and Vmca at paced breathing (P=0·0005), but not at rest (P=0·235). Conclusion Our results show that LFO phase shift ABP-oxyHb may be used as a robust measurement of differences in autoregulation between hemispheres and over time. In addition, we found a strong relation between oxyHb and Vmca during paced breathing. Gain showed too large variation for clinical use, as the SD was up to 100-fold of mean values. ? 2012 Stichting European Society for Clinical Investigation Journal Foundation. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867744224&doi=10.1111%2fj.1365-2362.2012.02704.x&partnerID=40&md5=292a02172ccc0ee07688dd88dad56112 https://scholars.lib.ntu.edu.tw/handle/123456789/611806 |
DOI: | 10.1111/j.1365-2362.2012.02704.x |
顯示於: | 應用力學研究所 |
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