An evaluation of a new continuous blood pressure monitoring system in critically ill patients
An evaluation of a new continuous blood pressure monitoring system in critically ill patients
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DOI：
10.1016/s0952-8180(00)00201-4
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发表时间：
2000-11-01
影响因子：
6.7
通讯作者：
Ramasubramanian, R
中科院分区：
文献类型：
--
作者：
Heard, SO;Lisbon, A;Ramasubramanian, R
研究目的：确定DxTek监护仪是否与动脉内血压测量一样准确。DxTek监护仪是一种通过脉搏血氧饱和度、光学体积计和心电图获得的脉搏速度和波形无创、连续测量血压的设备。设计：前瞻性、对比研究。地点：大学医学中心。患者：28例重症监护病房患者。干预：动脉内导管和DxTek每分钟报告一次血压，振荡监测仪每10分钟报告一次血压，持续2~5小时。DxTek校准最初被执行，当由照顾者执行指定的患者操作时(平均每100分钟)。与动脉内压的比较包括：1)DxTek用动脉导管压力校准，2)DxTek用示波压力校准，3)示波压力校准。测量和主要结果：当比较示波压力与动脉内压时，平均差值(BIAS)：收缩压(SBP)为-4.0 mm Hg，舒张压(DBP)和平均动脉压(MAP)为-1.5 mm Hg。差值(精密度)的标准偏差平均值分别为9.6、6.4和6.3毫米汞。通过将DxTek设备校准为动脉内压，将DxTek压力与动脉内压进行比较，结果显示所有三种压力的偏差均为0.5 mm Hg，SBP、DBP和MAP的平均精确度分别为10.1 mm Hg、6.0 mm Hg和6.7 mm Hg。在DxTek设备校准为示波压力后，DxTek压力与动脉内压相比，导致SBP、DBP和MAP的平均偏差分别为-5.1、-0.8和-2.2 mm Hg，平均精度分别为11.1、7.7和8.1 mm Hg。结论：DxTek监测仪提供了连续的、无创的血压测量，其精度与示波仪相当。(C)2000年，爱思唯尔科学公司。
Study Objective: To determine if the DxTek monitor, which is a device that measures blood pressure (BP) noninvasively and continuously by means of pulse velocity and wave shapes derived from the pulse oximeter optical plethysmograph and electrocardiogram is as accurate as an oscillometric cuff device when compared with intraarterial BP measurement.Design: Prospective, comparative study.Setting: University Medical Center.Patients: 28 intensive care unit patients.Interventions: Blood pressures were reported every minute by intraarterial catheters and DxTek and every 10 minutes by an oscillometric monitor for 2 to 5 hours. DxTek calibration was performed initially and when specified patient manipulations by caretakers were performed (on average, every 100 minutes). Comparisons with intraarterial pressure included: 1) DxTek calibrated with arterial catheter pressure, 2) DxTek calibrated with oscillometric pressure, and 3) oscillometric pressure.Measurements and Main Results: When comparing oscillometric pressure to intraarterial pressure, the averages of the mean differences (bias) were -4.0 mmHg for systolic (SBP) and < 1.5 mmHg for diastolic (DBP) and mean (MAP) pressures. The averages of the standard deviation of the differences (precisions) were 9.6, 6.4, and 6.3 mmHg, respectively. With the DxTek device calibrated to intraarterial pressure, comparison of the DxTek pressure to intraarterial pressure resulted in a bias 0.5 mmHg for all three pressures and an average precision of 10.1 mmHg for SBP, 6.0 mmHg for DBP, and 6.7 mmHg for MAP. With the DxTek device calibrated to the oscillometric pressure, the DxTek pressure compared to the intraarterial pressure resulted in average biases of -5.1, -0.8, and -2.2 mmHg and average precisions of 11.1, 7.7, and 8.1 mmHg for SBP, DBP and MAP, respectively.Conclusions: The DxTek monitor provides continuous, noninvasive BP measurements with an accuracy comparable to oscillometric devices. (C) 2000 by Elsevier Science Inc.