Efficacy of a continuous non -invasive arterial pressure monitor system during general anesthesia

LI Jing; ZHOU Ting; TIAN Li-ping; XU Shi-yuan; ZHANG Hong-fei

Abstract：Objective To investigate the accuracy, precision and safety of continuous non-invasive blood pres-sure( NIBP) monitoring delivered by TL_300 tensymeter system.Methods Twenty ASA classification of Ⅰ-Ⅲadult patients undergoing elective surgeries in a supine position under general anesthesia were included in the study.A catheter was placed into the left radial artery under local anesthesia before induction, with the TL_300 tensymeter system connected to the right arm.Continuous invasive blood pressure ( IBP) monitoring was derived from the invasive artery catheter while the NIBP was from TL_300 tensymeter system.Systolic, diastolic and mean arterial pressure were recorded every 3 mi-nutes simultaneously for both IBP and NIBP from 5 min after monitoring to the end of surgery.Complications associated with both pressure monitors including limb ischemia, necrosis and paresthesia were recorded postoperatively.Results Data showed that difference between IBP and NIBP was (-0.086 ±9.59)mmHg, (3.203 ±7.11)mmHg and (2.60 ± 6.76)mmHg for systolic arterial pressure, diastolic arterial pressure, mean arterial pressure, respectively.The correlation coefficient between two methods was 0.843, 0.752 and 0.854 for systolic, diastolic and mean pressure, respectively.No limb ischemia, necrosis and paresthesia were observed in any patient.Conclusion TL_300 tensymeter system provides continuous, real-time, non-invasive and reliable arterial pressure measurements which is comparable to IBP, and can be safely used in adult patients under general anesthesia during elective surgery.