Crilly Mike, Coch Christoph, Bruce Margaret, Clark Hazel, Williams David
Department of Public Health, University of Aberdeen Medical School, Polwarth Building at Foresterhill, Aberdeen, UK.
Blood Press. 2007;16(4):262-9. doi: 10.1080/08037050701464385.
To estimate the repeatability of radial pulse wave analysis (PWA) in measuring central systolic and diastolic blood pressures (cSBP/cDBP), pulse pressure (cPP), augmentation pressure (cAP) and pulse pressure amplification (PPA).
After 15 min supine rest, 20 ambulant patients (aged 27-82 years; four female) underwent four SphygmoCor PWA measurements on a single occasion. Two nurses independently undertook two measurements in alternate order, blind to their colleague's measurements. Analysis was by Bland-Altman limits of agreement (LOA).
Heart rate and brachial blood pressure (BP) were stable during assessment. Based on the average of two PWA measurements between-observer differences (LOA, mean difference +/- 2SD) were small (cSBP 1.5 +/- 10.9 mmHg; cDBP 0.4 +/- 5.2 mmHg; cAP 0.5 +/- 4.5 mmHg; cPP 1.1 +/- 10.5 mmHg; PPA -0.5% +/- 5.6%). Between-observer differences were much greater for single/initial PWA measurement (cSBP 3.6 +/- 15.9 mmHg; cDBP 2.8 +/- 8.8 mmHg; cAP 0.7 +/- 5.8 mmHg; cPP 0.8 +/- 13.6 mmHg; PPA -1.2 +/- 9.4%). Within-observer LOA were very similar for both nurse A (cSBP -4.2 +/- 14.1 mmHg; cDBP -4.6 +/- 13.1 mmHg; cAP -0.4 +/- 4.4 mmHg; cPP 0.5 +/- 11.0 mmHg; PPA 0.7% +/- 9.0%) and nurse B (cSBP 0.0 +/- 12.1 mmHg; cDBP 0.2 +/- 8.5 mmHg; cAP -0.1 +/- 4.4 mmHg; cPP -0.2 +/- 11.9 mmHg; PPA -0.7% +/- 10.6%).
Non-invasive assessment of central aortic pressures using PWA on a single occasion is highly repeatable in ambulant patients even when used by relatively inexperienced staff.
评估桡动脉脉搏波分析（PWA）测量中心收缩压和舒张压（cSBP/cDBP）、脉压（cPP）、增强压（cAP）和脉压放大率（PPA）的可重复性。
20例门诊患者（年龄27 - 82岁；4例女性）在仰卧休息15分钟后，单次接受四次SphygmoCor PWA测量。两名护士独立进行测量，测量顺序交替，且对同事的测量结果不知情。采用Bland - Altman一致性界限（LOA）进行分析。
评估期间心率和肱动脉血压（BP）稳定。基于两次PWA测量的平均值，观察者间差异（LOA，平均差异±2SD）较小（cSBP 1.5±10.9 mmHg；cDBP 0.4±5.2 mmHg；cAP 0.5±4.5 mmHg；cPP 1.1±10.5 mmHg；PPA -0.5%±5.6%）。单次/首次PWA测量的观察者间差异更大（cSBP 3.6±15.9 mmHg；cDBP 2.8±8.8 mmHg；cAP 0.7±5.8 mmHg；cPP 0.8±13.6 mmHg；PPA -1.2±9.4%）。护士A（cSBP -4.2±14.1 mmHg；cDBP -4.6±13.1 mmHg；cAP -0.4±4.4 mmHg；cPP 0.5±11.0 mmHg；PPA 0.7%±9.0%）和护士B（cSBP 0.0±12.1 mmHg；cDBP 0.2±8.5 mmHg；cAP -0.1±4.4 mmHg；cPP -0.2±11.9 mmHg；PPA -0.7%±10.6%）的观察者内LOA非常相似。
即使由相对缺乏经验的工作人员操作，在门诊患者中单次使用PWA进行中心主动脉压的无创评估仍具有高度可重复性。
