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Published on: November 24, 2014
Digital tools to facilitate intraoperative coronary artery bypass graft patency assessment
Lognathen Balacumaraswami1, David P Taggart
1Department of Cardiothoracic Surgery, John Radcliffe Hospital, Headington, Oxford, UK.
Insights
Verifying coronary artery bypass graft patency during surgery is crucial. Intraoperative fluorescence imaging and transit-time flowmetry offer real-time assessments, aiding in preventing graft failure and improving patient outcomes.
Area of Science:
- Cardiovascular Surgery
- Medical Imaging
- Surgical Technology
Background:
- Intraoperative graft failure significantly contributes to cardiac mortality and morbidity.
- Ensuring graft patency is paramount in coronary artery bypass grafting (CABG).
- Current methods for assessing intraoperative graft patency lack universal consensus.
Purpose of the Study:
- To review techniques for assessing intraoperative coronary artery bypass graft patency.
- To discuss the utility and limitations of intraoperative fluorescence imaging and transit-time flowmetry.
- To summarize current knowledge on these two specific techniques for graft patency assessment.
Main Methods:
- Review of existing literature on intraoperative graft patency assessment techniques.
- Description of intraoperative fluorescence imaging using indocyanine green dye.
- Explanation of transit-time flowmetry utilizing ultrasound principles.
Main Results:
- Intraoperative fluorescence imaging provides real-time visual feedback of graft flow.
- Transit-time flowmetry offers quantitative data on mean graft flow and pulsatility index.
- Both techniques present unique advantages and limitations in assessing graft patency.
Conclusions:
- Accurate intraoperative graft patency assessment is vital for reducing CABG complications.
- Fluorescence imaging and transit-time flowmetry are promising tools for real-time graft assessment.
- Further evaluation is needed to establish a universally accepted method for intraoperative graft patency verification.
Abstract:
Intraoperative graft failure is an important cause of cardiac mortality and morbidity. Hence, verification of graft patency should be one of the most important aspects of coronary artery bypass grafting. Although several techniques have been advocated to assess intraoperative graft patency, there is no unanimously accepted method. Intraoperative fluorescence imaging is a novel technique based on the fluorescence of indocyanine green dye, which provides real-time visual images of graft flow in the operating room. Transit-time flowmetry is based on the ultrasound principle and provides mean graft flow and derived values such as pulsatility index. This article describes the usefulness and limitations of various techniques in general and summarizes the current knowledge with the use of these two techniques in the setting of intraoperative coronary artery bypass graft patency assessment.
