Graf Sebastian, Craiem Damian, Armentano Ricardo L
Favaloro University (Facultad de Ingeniería, Ciencias Exactas y Naturales), Buenos Aires, Argentina. sgraf@ favaloro.edu.ar
Annu Int Conf IEEE Eng Med Biol Soc. 2012;2012:5610-3. doi: 10.1109/EMBC.2012.6347266.
Non invasive local arterial blood pressure measurement has become a challenge over recent years. The aim of this study was to evaluate in a general population the validity of an alternative method to assess systolic local arterial blood pressure, from the analysis of B-mode diameter waveforms, and to estimate the accuracy when compared to carotid and femoral arterial tonometry. In 190 asymptomatic subjects (51±11 years, range: 24-73; pulse pressure: 51±11 mmHg, range: 31-93) systolic arterial pressure was obtained at the left carotid and left femoral artery by applanation tonometry (SBP(Car)_Ton and SBP(Fem)_Ton) and by automatic analysis of B-mode echographic images, calibrated using an iterative exponential model. Tonometry and echocardiography-derived pressure estimates correlated significantly (R=0.99, p<0.05). Mean difference between the two methods was only -2.5±5.0 mmHg for carotid artery (SBP(Car)_Ton: 122±18 mHg), and -2.1±5.7 mmHg for femoral artery (SBP(Fem)_Ton: 134±21 mmHg), independent of pressure level. In conclusion, alternative method was found to allow an accurate and precise estimation of systolic local arterial pressure, with an underestimation error of ∼ 2%.
近年来，无创局部动脉血压测量已成为一项挑战。本研究的目的是在普通人群中评估一种替代方法的有效性，该方法通过分析B型直径波形来评估收缩期局部动脉血压，并与颈动脉和股动脉张力测量法相比估计其准确性。在190名无症状受试者（年龄51±11岁，范围：24 - 73岁；脉压：51±11 mmHg，范围：31 - 93 mmHg）中，通过压平式张力测量法（SBP(Car)_Ton和SBP(Fem)_Ton）以及使用迭代指数模型校准的B型超声图像自动分析，获取左颈动脉和左股动脉的收缩压。张力测量法和超声心动图得出的压力估计值显著相关（R = 0.99，p < 0.05）。两种方法之间的平均差异对于颈动脉仅为 -2.5±5.0 mmHg（SBP(Car)_Ton：122±18 mmHg），对于股动脉为 -2.1±5.7 mmHg（SBP(Fem)_Ton：134±21 mmHg），与压力水平无关。总之，发现替代方法能够准确精确地估计收缩期局部动脉压，低估误差约为2%。
