• Wen-Qian Lin, Huang-Hui Wu, Chang-Sheng Su, Jian-Teng Yang, Jin-Rong Xiao, Yu-Ping Cai, Xiao-Zhi Wu, and Guo-Zhong Chen.
• *Department of Anesthesiology, Fuzhou General Hospital Affiliated to Fujian Medical University †Department of Anesthesiology, Fuzhou General Hospital of Nanjing Military Region, Fuzhou, P.R. China.
• J Neurosurg Anesthesiol. 2017 Jan 1; 29 (1): 1-7.

BackgroundIntraoperative blood pressure (BP) is one of the basic vital signs monitoring. Compared with standard invasive BP measurement, TL-300 allows for a continuous and beat-to-beat noninvasive intraoperative BP monitoring. The current retrospective study compared the accuracy and precision of this noninvasive technique for continuous BP monitoring with that of standard invasive BP measurement in patients undergoing elective neurosurgery.Materials And MethodsBP records of 23 patients undergoing elective neurosurgery, measured by both noninvasive TL-300 and invasive radial arterial catheter method, were retrospectively analyzed. Variability in BP data was analyzed by using linear regressions and Bland-Altman analysis.ResultsFour thousand three hundred eighty-one pairs of BP measurements from a total of 23 patients were included. The coefficient of determination of systolic, diastolic, and mean BP were 0.908, 0.803, and 0.922, respectively. And their bias was found to be 1.3±5.87 mm Hg (95% limits of agreement: -10.2 to +12.8 mm Hg), 2.8±6.40 mm Hg (95% limits of agreement: -9.8 to +15.3 mm Hg), and 1.8±4.20 mm Hg (95% limits of agreement: -6.4 to +10.1 mm Hg), respectively.ConclusionsTL-300 system is a promising noninvasive alternative to the invasive arterial catheter method for intraoperative BP monitoring, with a high accuracy and precision. With the limitation of the current retrospective study, further prospective method comparison studies are needed.

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