Application Of 3D Printed Coronary Artery Model In Off-pump Coronary Artery Bypass Grafting

Background Coronary artery bypass grafting(CABG)was performed in the 1960 s and is still an important treatment for complex coronary heart disease.Because the coronary arteries(coronary arteries)are complex in anatomy,their movements are variable,and their individual differences are relatively large.Many times the surface of the heart is covered with fat.It is in continuous coronary artery bypass grafting that it can cause arrhythmia and significant changes in hemodynamics.It will even switch to extracorporeal circulation assisted coronary artery bypass grafting.In order to understand the coronary stenosis,stenosis and local anatomy more intuitively before surgery,and to guide the positioning of target blood vessels and related operations during surgery,a 1: 1 coronary artery model was printed by 3D printing technology and applied Perioperative planning of Off-pump coronary artery bypass grafting has achieved good results and brought convenience to the surgeon.Objective To replicate the coronary artery 1: 1 model using 3D printing technology,to accurately measure the coronary artery model,to compare the coronary artery model with the coronary CTA 3D reconstruction results and coronary angiography,and to compare whether the measured values are consistent,and Observe the location of coronary stenosis and the location of important branches;understand the specific morphology of the coronary arteries,determine the positions of the left anterior descending branch(LAD),left circumflex branch(LCX),and right coronary artery(RCA);locate the stenosis.Determine the position of the distal anastomosis,the target of the bypass graft,and mark it.Measure the distance from the proximal anastomosis to the distal anastomosis,and measure the coronary diameter at the anastomosis.Surgery planning was performed,the target of the bypass graft was positioned on the model,and the distance from the proximal anastomosis to the target was measured.According to the data measured by the model and the location of the stenosis,the target of the actual bypass graft was located during the operation,and a large saphenous vein of appropriate length was selected.Improve the traditional coronary artery bypass grafting and evaluate its clinical efficacy,and compare it with traditional coronary artery bypass grafting.Methods Thirty-six patients with coronary artery disease were divided into the observation group(20 cases)and the control group(16 cases).The observation group used 3D printing technology to print a 1: 1 coronary model to assist Off-pump coronary arteries.Way transplantation.The control group received conventional Off-pump coronary artery bypass grafting.The perioperative condition and postoperative follow-up results were compared between the two groups of patients.Results The surgery was successful in both groups,and both recovered and were discharged.Operation time(146.60 ± 7.51 min Vs in the observation group,156.00± 7.70 min in the control group,p <0.05),postoperative drainage(81.65 ±12.05 ml in the observation group,92.63 ± 18.60 ml in the control group,P <0.05),ICU monitoring and treatment time(Observation group 51.08 ± 4.26 h Vs control group 54.21 ± 4.88 h,P> 0.05),length of hospital stay after operation(observation group 6.46 ± 0.65 d Vs control group 6.55 ± 0.84 d,P> 0.05),length of lower saphenous vein incision(30.08 ± 3.15 cm Vs in observation group,33.68 ± 2.58 cm in control group,p <0.05).Both the observation group and the control group closed the chest once,and the chest incision and the saphenous vein incision healed well.In the observation group,no red blood cells were transfused during and after the operation,and in the control group,2 red blood cells were transfused.Conclusion Off-pump coronary artery bypass grafting with 3D printing technology has a better effect,and the operation time is shorter,and cardiac function and incision recovery are better in patients after surgery.Reducing the risk of surgery,suitable for the treatment of patients with complex coronary artery disease,its long-term effects need to be further observed.