Please use this identifier to cite or link to this item:
Title: Transit-time flow measurement is essential in coronary artery bypass grafting
Authors: Sim, E.K.W. 
Leong, D.K.H.
Ashok, V.
Nishkantha, A.
Shan, Y.H.
Issue Date: 2005
Citation: Sim, E.K.W., Leong, D.K.H., Ashok, V., Nishkantha, A., Shan, Y.H. (2005). Transit-time flow measurement is essential in coronary artery bypass grafting. Annals of Thoracic Surgery 79 (3) : 854-857. ScholarBank@NUS Repository.
Abstract: Background. Patent bypass grafts are fundamental to successful coronary artery bypass grafting. Intraoperative flow measurement through newly constructed grafts is a test of patency. We studied the use of transit-time flow measurement to determine its ability to detect technical errors in grafts, to measure the mean flow norms for Asian patients, and to compare arterial and vein grafts. Methods. From January 1, 2001, to June 30, 2002, 116 patients underwent isolated primary coronary artery bypass grafting. Sixty-seven patients underwent conventional coronary artery bypass grafting and 49 patients underwent off-pump coronary artery bypass grafting. There were 125 arterial and 197 vein grafts. Transit-time flow measurement was carried out on all completed grafts. Graft patency was assessed using flow curves, mean flow, and pulsatility index. Average of mean flows was calculated to determine mean flow norms. Arterial and vein grafts were compared by statistical analysis between the variables mean flow and pulsatility index. Results. In 6 patients with seven grafts, intraoperative graft assessment detected technical errors, which were corrected. Average mean flow was 37.4 ± 23.5 mL/min for left anterior descending coronary artery-to-left internal mammary artery grafts, and values ranging from 21.2 to 36.0 mL/min for the rest. There were no statistically significant differences in mean flow or pulsatility index between arterial and vein grafts. Conclusions. Transit-time flow measurement enables technical problems to be diagnosed accurately, allowing prompt revision of grafts. It should be mandatory in coronary artery bypass grafting to improve surgical outcomes. © 2005 by The Society of Thoracic Surgeons.
Source Title: Annals of Thoracic Surgery
ISSN: 00034975
DOI: 10.1016/j.athoracsur.2004.06.010
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Jun 15, 2021


checked on Jun 7, 2021

Page view(s)

checked on Jun 12, 2021

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.