Department of Anesthesiology, Leiden University Medical Center, 2300 RC Leiden, The Netherlands.
Br J Anaesth. 2012 Dec;109(6):981-9. doi: 10.1093/bja/aes275. Epub 2012 Aug 19.
Postoperative monitoring of ventilation is largely restricted to the measurement of haemoglobin-oxygen saturation and respiratory rate (RR) derived from the ECG. measurement is inadequate when used with supplemental oxygen and ECG-derived RR is subject to artifacts. A new monitor measures RR by quantifying the humidity of exhaled air (respiR8(®)).
The accuracy of the system was tested using a breathing simulator. In healthy volunteers, the respiR8(®) monitor was compared with two other methods of measuring RR: capnometry and counting of thoracic breathing movements. The ability of the monitor to track changes in RR resulting from the infusion of 2.5 μg kg(-1) fentanyl was assessed and compared with RR measured from a validated flow measurement system. The RR in 50 postoperative patients measured with the respiR8(®) was compared with that derived from the ECG. RR values were compared by population-based Bland-Altman analyses.
The respiR8(®) monitor was accurate in the range required in clinical practice. There was a close agreement between RR from respiR8(®), capnometry, and manual counting of respiratory movements without bias (limits of agreement ±1 bpm). The respiR8(®) monitor was well able to accurately track RR changes from fentanyl. In postoperative patients, RR from respiR8(®) and ECG had a bias of 1.7 (5.7) bpm due to greater RR values observed from the ECG due to artifacts.
The respiR8(®) gives an accurate measurement of RR and is useful in postoperative care.
术后通气监测在很大程度上仅限于测量血红蛋白-氧饱和度和源自心电图的呼吸频率（RR）。当与补充氧气一起使用时，测量是不充分的，而源自心电图的 RR 容易受到干扰。一种新的监测仪通过量化呼出空气的湿度（respiR8(®)）来测量 RR。
使用呼吸模拟器测试了该系统的准确性。在健康志愿者中，将 respiR8(®)监测仪与两种其他测量 RR 的方法进行了比较：呼气末二氧化碳测量法和胸部呼吸运动计数法。评估了监测仪跟踪因输注 2.5μgkg(-1)芬太尼而导致的 RR 变化的能力，并与从经过验证的流量测量系统测量的 RR 进行了比较。比较了 50 例术后患者使用 respiR8(®)测量的 RR 与源自心电图的 RR。通过基于人群的 Bland-Altman 分析比较 RR 值。
respiR8(®)监测仪在临床实践所需的范围内准确。RR 来自 respiR8(®)、呼气末二氧化碳测量法和手动呼吸运动计数法之间没有偏差（一致性界限±1 bpm）。respiR8(®)监测仪能够很好地准确跟踪芬太尼引起的 RR 变化。在术后患者中，由于心电图上观察到的 RR 因干扰而更高，因此源自 respiR8(®)和心电图的 RR 存在 1.7（5.7）bpm 的偏差。
respiR8(®)可准确测量 RR，在术后护理中很有用。
