Institute of Anaesthesiology, University Hospital of Zurich, Zurich, Switzerland.
J Cardiothorac Vasc Anesth. 2011 Apr;25(2):243-9. doi: 10.1053/j.jvca.2010.06.021. Epub 2010 Sep 20.
The aim of this study was to validate the revised SenTec V-Sign 2 sensor (SenTec AG, Therwil, Switzerland) for combined noninvasive continuous assessment of pulse rate, pulse oximetry (SpO(2)), and transcutaneous carbon dioxide tension (PtcCO(2)) in adults after cardiac surgery.
A prospective clinical study.
A single-center university hospital.
Twenty adult patients aged 36 to 84 years after cardiac surgery.
SpO(2) and PtcCO(2) values of three V-Sign 2 sensors (SenTec AG) attached at the earlobe, forehead, and cheek and SpO(2) values of the Nellcor Durasensor (Model DS-100A; Nellcor Puritan Bennett Inc, Pleasanton, CA) were compared with simultaneous measurements of blood gases and end-expiratory carbon dioxide.
Measurements were performed during periods of hyper-, normo-, and hypocapnia and then at 30-minute intervals up to 5 hours. Bland-Altman analysis and simple regression analysis were used.
The detection failures for PtcCO(2) were 0.3% to 1.3%, for SpO(2) 10% to 25%, and for pulse rate 5% to 10%. The V-Sign 2 earlobe sensor provided the best results. The mean bias and limits of agreement for PtcCO(2ear) and PaCO(2) were 1.1 and -3.4/+5.5 mmHg. The drift of PtcCO(2) was negligible at all locations. The mean bias and limits of agreement of V-Sign SpO(2ear) and SaO(2), as well as V-Sign pulse rate and the electrocardiogram, were -1.7% and -6.8/+3.9% and 1.2 beats/min and -3.3/+5.8 beats/min. End-expiratory carbon dioxide showed a weak correlation with PaCO(2) (r(2) = 0.47).
Transcutaneous capnometry using the revised V-Sign 2 sensor at the earlobe is a reliable monitoring tool during the recovery period of patients after cardiac surgery. This approach has the potential to reduce the number of arterial blood gas samples.
本研究旨在验证经改良的 SenTec V-Sign 2 传感器(瑞士 Therwil 的 SenTec AG)在心脏手术后成人患者中,能否联合无创连续评估脉搏率、脉搏血氧饱和度(SpO2)和经皮二氧化碳分压(PtcCO2)。
前瞻性临床研究。
单中心大学医院。
20 例年龄 36 岁至 84 岁的心脏手术后成年患者。
将 3 个 SenTec AG 生产的 V-Sign 2 传感器(耳夹式、额式和颊式)分别贴于患者耳夹、额头和脸颊,同时测量这些部位的 SpO2 和 PtcCO2 值,并与血气分析和呼气末二氧化碳值进行比较。
在高碳酸血症、正常碳酸血症和低碳酸血症期间,以及在 5 小时内每 30 分钟进行一次测量。采用 Bland-Altman 分析和简单回归分析。
PtcCO2 的检测失败率为 0.3%至 1.3%,SpO2 为 10%至 25%,脉搏率为 5%至 10%。耳夹式 V-Sign 2 传感器的结果最好。PtcCO2ear 和 PaCO2 的平均偏差和一致性界限为 1.1mmHg 和-3.4/+5.5mmHg。所有部位的 PtcCO2 漂移均可以忽略不计。V-Sign SpO2ear 和 SaO2 的平均偏差和一致性界限,以及 V-Sign 脉搏率和心电图,分别为-1.7%和-6.8/+3.9%和 1.2 次/分和-3.3/+5.8 次/分。呼气末二氧化碳与 PaCO2 呈弱相关(r2=0.47)。
经改良的 V-Sign 2 传感器耳夹式监测在心脏手术后患者恢复期是一种可靠的监测工具,它有潜力减少动脉血气样本的数量。