Instant myocardial blood flow monitor: its calibration and assessment of flow capacity of the intracoronary shunt tube

The Annals of Thoracic Surgery
Hiroyuki KamiyaKazuyuki Kawakami

Abstract

We developed a new instant regional myocardial blood flow (RMBF) monitor utilizing the thermal diffusion method in which the RMBF value is presented as the value inversely proportional to the thermocouple voltage output (1/V). The purposes of this study were (1) to validate the accuracy of RMBF measurement by the instant RMBF monitor in comparison with the colored microsphere method for calibration; (2) to investigate influences of it on the RMBF; and (3) to assess changes in RMBF caused by the shunt tube insertion. Twenty pigs were used for this study: 4 for comparison between the instant RMBF meter and the colored microsphere method, 4 for validation of reproducibility, and 6 for measurement of RMBF during shunt tube. The relation between RMBF values obtained by the colored microsphere method and 1/V values by instant RMBF monitor was colored microsphere = 140,992 (1/V)--231 in epicardial layer (R2 = 0.819) and colored microsphere = 111,381 (1/V)--165 in endocardial layer (R2 = 0.693). The correlation coefficient and R2 values between RMBF values measured by both methods were 0.985 and 0.839 in epicardial layer, and 0.963 and 0.679 in endocardial layer, respectively. The RMBF at each layer did not change after the attachment ...Continue Reading

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May 20, 2003·European Journal of Cardio-thoracic Surgery : Official Journal of the European Association for Cardio-thoracic Surgery·Hiroyuki KamiyaTaro Kanamori

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Citations

Oct 1, 2006·Innovations : Technology and Techniques in Cardiothoracic and Vascular Surgery·Shigeyuki TomitaSatoru Nishida
Sep 13, 2008·Interactive Cardiovascular and Thoracic Surgery·Kiyoshi KoizumiRyohei Yozu
Nov 13, 2012·The Journal of Thoracic and Cardiovascular Surgery·Yoshiyuki TakamiYoshimasa Sakai
Mar 31, 2012·Heart, Lung & Circulation·W J McMenimanJ Posen
Sep 26, 2006·The Annals of Thoracic Surgery·Sathiakar Paul CollisonNaresh Trehan
Dec 22, 2005·The Annals of Thoracic Surgery·Taro KanamoriYoshinao Koshida

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