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  • Küçük Resim
    Öğe
    A comparison of blood pressure and pulse pressure values obtained by oscillometric and central measurements in hypertensive patients
    (Taylor & Francis Ltd, 2010) Kayrak, Mehmet; Ülgen, Mehmet S.; Yazıcı, Mehmet; Yılmaz, Remzi; Demir, Kenan; Doğan, Yıldız; Bodur, Sait
    Objective. Wide pulse pressure (PP) affects the accuracy of oscillometric blood pressure measurements (OBPM): however, the degree of this impact on different patient groups with wide PPs is unclear. This study will investigate the accuracy of OBPM in achieving target BP and PP in isolated systolic hypertension (ISH) group compared with mixed hypertension (MHT) group. Method. A total of 115 patients (70 with ISH and 45 with MHT) were enrolled in the study. Upper arm and wrist OBPM, obtained by OmronM3 and OmronR6 devices respectively, were compared with the simultaneously measured values from the ascending aorta. The ISH was defined as a systolic blood pressure (SBP) >= 140 mmHg and a diastolic blood pressure (DBP) < 90 mmHg. MHT was defined as a SBP >= 140 mmHg and a DBP >= 90 mmHg. Results. The mean central arterial blood pressure (BP) and central PP were higher in the ISH group than those in the MHT group. The upper arm OBPM underestimated the central SBP in two groups (-5 mmHg, -3 mmHg, p=0.5, respectively), but overestimated DBP in the ISH group compared with MHT patients (6.8 mmHg, 1 mmHg, p=0.04, respectively). Wrist OBPM similarly underestimated to the central SBP in each group (-16 mmHg, -19 mmHg, p=0.15), whereas the sum of overestimation of DBP was significantly higher in the ISH than in the MHT group (+6 mmHg, - 1 mmHg, p=0.001, respectively). Also, each of the devices underestimated the central PP in the ISH group (about 10 mmHg) as being higher than that of the MHT group. Conclusion. Oscillometric devices may be used for self-BP measurement in patients with ISH without clinically important disadvantages compared with the patients with MHT. For PP measurement in patients with ISH, there were substantial differences between intra-arterial and indirect arm BP measurements.
  • Küçük Resim
    Öğe
    The Impact of Central Blood Pressure Levels on the Relationship Between Oscillometric and Central Blood Pressure Measurements: A Multicenter Invasive Study
    (Wiley, 2013) Alihanoğlu, Yusuf; Kayrak, Mehmet; Ülgen, Mehmet S.; Yazıcı, Mehmet; Yılmaz, Remzi; Bodur, Sait
    The aim of this study was to investigate impact of central blood pressure (BP) levels and sex on the difference between central and upper arm oscillometric BP values. Oscillometric arterial BP measurements of 675 patients were simultaneously compared with values measured from the ascending aorta. The patients were divided into 3 groups according to systolic BP levels. The upper arm oscillometric device overestimated systolic BP (SBP) at low and medium BP levels but it underestimated SBP at high BP level. As for the effect of sex on differences in central and oscillometric BP, SBP was overestimated to a lesser degree in women than in men at low BP levels, but it was more highly underestimated in women than in men at high BP levels. The difference between oscillometric upper arm BP and aortic BP was directly affected by the patient's central BP level. In addition, the difference between central and oscillometric BP was also affected by sex factor.