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[The estimation of blood circulation parameters using imaging techniques--comparison with measurements made using the
M V Helzel1, M Sold, R Rothhammer
1Abteilung für Röntgendiagnostik, Chirurg. Univ.-Klinik, Würzburg.
Rontgen-Blatter; Zeitschrift Fur Rontgen-Technik Und Medizinisch-Wissenschaftliche Photographie
|September 1, 1990
Abstract:
Circulation can be evaluated by means of measuring parameters in X-ray-thorax and ultrasonography. Changes in haemodynamics can be estimated by measured changes in width of vena azygos. Additional sonography of systemic veins of thoracic inlet (V. jugularis interna, V. cava inferior) improves multiple correlation to circulating blood volume up to r = 0.81. Supine or erect position and type of ventilation are influencing factors. Diaphragm motility was measured by means of ultrasonography: patients with assisted ventilation showed significantly decreased motility compared to patients with spontaneous breathing.