Frequency-domain vs continuous-wave near-infrared spectroscopy devices: a comparison of clinically viable monitors in controlled hypoxia

被引:27
作者
Davies, David James [1 ,2 ]
Clancy, Michael [3 ]
Lighter, Daniel [4 ]
Balanos, George M. [5 ]
Lucas, Samuel John Edwin [5 ]
Dehghani, Hamid [3 ]
Su, Zhangjie [1 ,6 ]
Forcione, Mario [2 ]
Belli, Antonio [1 ,2 ,6 ]
机构
[1] Univ Hosp Birmingham NHS Fdn Trust, NIHR SRMRC, Heritage Bldg Old Queen Elizabeth Hosp, Birmingham B15 2TH, W Midlands, England
[2] Univ Hosp Birmingham NHS Fdn Trust, Dept Neurosurg, Birmingham, W Midlands, England
[3] Univ Birmingham, PSIBS Doctoral Training Ctr, Birmingham, W Midlands, England
[4] Univ Birmingham, Sch Chem, Birmingham, W Midlands, England
[5] Univ Birmingham, Sch Sport Exercise & Rehabil Sci, Birmingham, W Midlands, England
[6] Univ Birmingham, Sch Clin & Expt Med, Birmingham, W Midlands, England
基金
欧盟地平线“2020”;
关键词
Head injury; Cerebral blood flow; Frequency-domain near-infrared spectroscopy; Continuous-wave near-infrared spectroscopy; TRAUMATIC BRAIN-INJURY; DIFFUSE OPTICAL TOMOGRAPHY; CEREBRAL OXYGENATION; SURGERY; ACTIVATION; SATURATION; FMRI;
D O I
10.1007/s10877-016-9942-5
中图分类号
R614 [麻醉学];
学科分类号
100217 ;
摘要
The Near-infrared spectroscopy (NIRS) has not been adopted as a mainstream monitoring modality in acute neurosurgical care due to concerns about its reliability and consistency. However, improvements in NIRS parameter recovery techniques are now available that may improve the quantitative accuracy of NIRS for this clinical context. Therefore, the aim of this study was to compare the abilities of a continuous-wave (CW) NIRS device with a similarly clinically viable NIRS device utilising a frequency-domain (FD) parameter recovery technique in detecting changes in cerebral tissue saturation during stepwise increases of experimentally induced hypoxia. Nine healthy individuals (6M/3F) underwent a dynamic end-tidal forced manipulation of their expiratory gases to induce a stepwise induced hypoxia. The minimum end-tidal oxygen partial pressure (EtO2) achieved was 40 mm Hg. Simultaneous neurological and extra-cranial tissue NIRS reading were obtained during this protocol by both tested devices. Both devices detected significant changes in cerebral tissue saturation during the induction of hypoxia (CW 9.8 +/- 2.3 %; FD 7.0 +/- 3.4 %; Wilcoxon signed rank test P < 0.01 for both devices). No significant difference was observed between the saturation changes observed by either device (P = 0.625). An observably greater degree of noise was noticed in parameters recovered by the FD device, and both demonstrated equally variable baseline readings (Coefficient of variance 8.4 and 9.7 % for the CW and FD devices, respectively) between individuals tested. No advantageous difference was observed in parameters recovered from the FD device compared with those detected by CW.
引用
收藏
页码:967 / 974
页数:8
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