A New Index of Intraoperative Transit-Time Flow Evaluation in Coronary Artery Bypass Grafting

良行, 高味; 弘, 増本

doi:10.4326/jjcvs.35.5

Cited by 5 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some reports suggest that to be satisfactory, grafts need to meet the following values: PI less than 5.0, DFI greater than 50, and MGF greater than 10 or 15 mL/min. 5,6 By those criteria, among our 159 patients, 12 RITAs (8%), 13 LITAs (8%), 20 GEAs (23%), and 10 SVGs (20%) failed to achieve satisfactory PI scores (with PI being immeasurably high in some cases). Among these poor-scoring grafts, additional substandard DFI scores were found in two LITAs and six GEAs, and among the grafts with substandard PI and DFI scores, one LITA and one GEA also had substandard MGF scores (G10 mL/min).…”

Section: Discussionmentioning

confidence: 87%

Intraoperative Fluorescence Imaging after Transit-Time Flow Measurement during Coronary Artery Bypass Grafting

Kuroyanagi

Asai

Suzuki

2012

Innovations�(Phila)

View full text Add to dashboard Cite

Objective This report describes the complementary use of transit-time flow measurement (TTFM) and intraoperative fluorescence imaging (IFI) during off-pump coronary artery bypass grafting (OPCAB) and compares their results with those of subsequent coronary angiography. Methods The subjects were 159 OPCAB patients, with a total of 435 grafts at a single center between April 2009 and November 2011. During surgery, all grafts were assessed initially by both TTFM and IFI. Transit-time flow measurement was used for screening grafts for possible revision, then IFI was applied to check patency. For IFI, indocyanine green was injected into the superior vena cava, then the presence and timing of fluorescent enhancement were monitored in coronary and graft vessels. Results Twelve grafts were revised after poor TTFM scores. Despite some poor TTFM scores even after revision, subsequent IFI showed that all grafts were enhanced. However, two grafts showed delayed enhancement. In one internal thoracic artery (ITA), delay was caused by competitive flow from a mildly stenotic native coronary artery. The other delayed-enhancement ITA was revised. Reanastomosis was constructed with shorter ITA at the larger lumen size. After about 1 week, all patients underwent coronary angiography (plain angiography for 31, computed tomography angiography for 128). These demonstrated that all 385 arterial grafts, and 48 out of 50 venous grafts, were patent. Conclusions Our OPCAB series using TTFM and IFI achieve extremely high graft patency in the early graft assessments. “Delayed enhancement” of one ITA in comparison with the other suggested either native competitive flow or a bypass graft problem.

show abstract

Section: Discussionmentioning

confidence: 87%

Intraoperative Fluorescence Imaging after Transit-Time Flow Measurement during Coronary Artery Bypass Grafting

Kuroyanagi

Asai

Suzuki

2012

Innovations�(Phila)

View full text Add to dashboard Cite

show abstract

“…10) Figure 2 shows that even at a mean flow rate of ≤20 ml/min, the postoperative graft had not always failed, thus suggesting that graft performance cannot be assessed based solely on flow rate. Furthermore, statistical correlations were identified between flow rate and resistance, and between resistance and compliance ( Figs.…”

Section: Commentmentioning

confidence: 99%

Evaluation of a New Device for the Intraoperative Assessment of Coronary Artery Bypasses Grafting

Nakata

Sankai

Akiyama

et al. 2011

ATCS

View full text Add to dashboard Cite

Purpose: The aim of this study was to evaluate a new flow analyze device that can intraoperatively measure compliance and resistance of coronary artery bypass grafting (CABG) by the parameter identification method. Methods: Subjects were 95 patients who underwent CABG. Angiography soon after surgery confirmed patency in 90 grafts and graft failure in 5 grafts. Variables of Aortic pressure and the graft flow were entered into this new device that includes a mathematical coronary circulation model to extrapolate other information the data; thus, we can estimate intraoperative flow rate, resistance, and compliance. Flow rate, resistance, and compliance were compared between patent and failed graft groups and among three different type grafts. Results: There were no differences in flow rate, resistance, and compliance among the three grafts types. Between the patent and failed graft groups, there were statistically significant differences in flow rate and resistance, and compliance tended to be lower for the failed graft group. Conclusions: By measuring graft resistance and compliance, this new device is useful for evaluating graft performance during CABG.

show abstract

Vessels Anastomosis Supporting Device for Coronary Artery Bypass Grafting

Haneda

Masuzawa

Osa

et al. 2019

Journal of Life Support Engineering

View full text Add to dashboard Cite

Coronary artery bypass grafting devices using integrated low-level energies adhesion has been developed. A prototype device was developed to establish device operating procedure for quick vascular adhesion and to indicate feasibility of anastomosis with the proposed mechanism. A cylinder part which has a nichrome winding is located at a tip of the prototype device to fix the position of a bypass graft on a coronary with vacuum and to give heat energy to the vessels. The sequence of the suction was suitably selected because the air flow due to suction deteriorated a heating capacity in the temperature measurement test. The prototype device successfully demonstrated the ability of vascular adhesion under blood flow environment. Then, an improved device with a compact cylinder and modified arms which has integrated heating and pressurizing mechanism was developed to easier access to the coronary and to prevent the heater from contacting to surrounding tissues was developed. An anastomosis success rate of the improved device is 83%. In addition, the improved device indicates sufficient tensile force which is 1.4 times higher than that of the prototype device and can withstand a blood pressure of 350 mmHg.

show abstract

A New Index of Intraoperative Transit-Time Flow Evaluation in Coronary Artery Bypass Grafting

Cited by 5 publications

References 11 publications

Intraoperative Fluorescence Imaging after Transit-Time Flow Measurement during Coronary Artery Bypass Grafting

Intraoperative Fluorescence Imaging after Transit-Time Flow Measurement during Coronary Artery Bypass Grafting

Evaluation of a New Device for the Intraoperative Assessment of Coronary Artery Bypasses Grafting

Vessels Anastomosis Supporting Device for Coronary Artery Bypass Grafting

Contact Info

Product

Resources

About