Real-time patency control with thermal coronary angiography in 1401 coronary artery bypass grafting patients

Abstract

Thermal imaging provides decisive coronary angiographies, and detects the perfusion area and flow of the implanted graft. It allows real-time detection of technical failures, reveals unexpected occluding plaques or any kind of flow-restricting lesions, and gives the chance of refinement of the anastomosis during the arrest period. We believe that the thermal imaging technique is a safe, noninvasive and feasible method to document the quality of the myocardial revascularization intraoperatively.

Enhanced Surgical Imaging: Laparoscopic Vessel Identification and Assessment of Tissue Oxygenation

“…Of those studies attempting to measure endorgan oxygenation, oxymeters (21) and spectrophotometer probes (25) have been utilized and were found either to ineffective or provided only a limited sampling of tissue oxygenation. Many technologies employed by other specialties measure flow to an organ and not actual tissue oxygenation (26)(27)(28)(29)(30), or measure postoperative oxygenation(31,32). 3-CCD enhancement allows for a quantifiable, intraoperative assessment of renal oxygenation and could provide critical data about the blood supply to the kidney.…”

“…Vascular surgeons, during open and endovascular abdominal aortic aneurysm (AAA) repair have sought ways to detect ischemic colitis intraoperatively before the procedure is completed (20,21,25,38). Similar technology is being investigated by cardiac surgeons to assess graft-patency intraoperatively during coronary artery bypass grafts (26)(27)(28). Infrared imaging has been investigated in cardiac surgery; however, this technique does not give actual values for oxygen saturations (27,28).…”

“…Similar technology is being investigated by cardiac surgeons to assess graft-patency intraoperatively during coronary artery bypass grafts (26)(27)(28). Infrared imaging has been investigated in cardiac surgery; however, this technique does not give actual values for oxygen saturations (27,28).…”

Real-time intraoperative visualization of myocardial circulation using augmented reality temperature display

“…Infrared (IR) imaging techniques were introduced to cardiac monitoring in the early 1970's [2]. Intraoperative evaluation of graft function has been carried out since the 1990's, and since then it has been the major application of IR imaging in this field [3,4]. In order to take full advantage of the highly resolved spatial and temporal information available, successful attempts have been made towards extracting quantitative information from IR data.…”

The importance of intraoperative angiographic findings for predicting long-term patency in coronary artery bypass operations

“…[20][21][22][23][24][25] Some reports exist on the use of fluorescence and thermal imaging. [26][27][28][29] Invasive methods such as use of intra-arterial flow and pressure wires, angioscopy and intravascular ultrasonography imply passing of the devices through the recently sutured anastomosis and are not implemented in clinical practice. [30][31][32][33] Coronary angiography gives morphologic information on vessel lumen and is considered the "gold standard" of graft quality assessment, but the method has not had a defined role in intraoperative imaging.…”