Combined Use of Chest X-rays and Body Mass Index to Predict Pulmonary Hemodynamics in Patients with Chronic Obstructive Pulmonary Disease.

  • Kudoh Yukiharu
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Takada Kazuo
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Iwabuchi Katsuyoshi
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Kathoh Shuuichi
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Takahashi Hifumi
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Seino Shuuichi
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Sata Makoto
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Satoh Shinobu
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Tomoike Hitonobu
    The First Department of Internal Medicine, Yamagata University School of Medicine
  • Takahashi Keiji
    Department of Laboratory Medicine, Yamagata University School of Medicine

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Other Title
  • 慢性閉塞性肺疾患患者の肺循環動態を推定するための胸部X線写真,体格指数の有用性

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Abstract

A study was undertaken to determine whether measurements of radiological indices from chest X-rays and body mass index (BMI) were useful in predicting pulmonary artery hypertension. Measurements of the cardiothoracic ratio (CTR) as well as right descending pulmonary artery diameter (RDPA) and BMI were made in 27 patients with chronic obstructive pulmonary disease (COPD). Mean pulmonary arterial pressure(mPA)correlated with CTR, RDPA and BMI. Multiple regression analysis gave the useful equation: predicted mPA=-3.523+0.196xBMI+0.110xCTR+0.786xRDPA (r=0.704, p<0.002). Fifteen patients were found to have pulmonary hypertension, defined as mPA≥20mmHg. The sensitivity of CTR and BMI were 86.7%. The specificity of BMI was 83.30%. These results suggest that the measurements CTR, RDPA and BMI may be useful in screening for pulmonary hypertension in patients with COPD.

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