Novel device accurately measures graft resistance and compliance to ensure quality of coronary artery bypass.
BACKGROUND
The purpose of this study is to know the influence of coronary artery bypass grafting (CABG) on coronary circulation. In the present study, we evaluated CABG by using a novel flow analyzer that can calculate bypass graft resistance (Ra), resistance of the peripheral bed to which graft connects (Rp), the inertia of blood flow through the graft (L) and vascular wall compliance (C).


METHODS
We performed off-pump CABG surgery on fifteen pigs assigned to the following groups (n = 5 each): normal CABG, competitive flow grafts and constrictive grafts.


RESULTS
The wave pattern of 3 groups showed a clearly different form. In normal CABG and competitive flow group, we accepted a statistical difference in Rp and flow. In normal CABG and constrictive grafts. We accepted a statistical difference in Ra and flow.


CONCLUSIONS
We can know the relationship between CABG and coronary circulation by this device in detail. This device will be useful for evaluating graft performance during CABG.
Department of Cardiovascular Surgery, Nihon University School of Medicine, Tokyo, Japan.
Kinichi
K
Nakata
Yukihiko
Y
Orime
Kenji
K
Akiyama
Hayato
H
Koba
Yoshiyuki
Y
Sankai
Motomi
M
Shiono
D000465:Algorithms; D000818:Animals; D003187:Compliance; D001026:Coronary Artery Bypass / Q000379:methods / Q000592:standards; D003326:Coronary Circulation; D004195:Disease Models, Animal; D006085:Graft Survival; D008432:Mathematical Computing; D017202:Myocardial Ischemia / Q000503:physiopathology / Q000601:surgery*; D012212:Rheology / Q000379:methods; D034421:Sus scrofa; D014655:Vascular Resistance