Haemodynamics Study of Tapered Stents Intervention to Tapered Arteries

Autor: Xiang Shen, Kaikai Lu, Hongfei Zhu, Deng Yongquan, Jiabao Jiang
Rok vydání: 2019
Předmět:
medicine.medical_treatment
Finite Element Analysis
0206 medical engineering
Biomedical Engineering
Hemodynamics
02 engineering and technology
Coronary stenosis
030204 cardiovascular system & hematology
Prosthesis Design
Coronary Restenosis
03 medical and health sciences
Percutaneous Coronary Intervention
0302 clinical medicine
Restenosis
Risk Factors
Coronary Circulation
medicine
Humans
Stent implantation
Computer Simulation
cardiovascular diseases
business.industry
Coronary Stenosis
Models
Cardiovascular

Stent
Numerical Analysis
Computer-Assisted

equipment and supplies
medicine.disease
Coronary Vessels
020601 biomedical engineering
surgical procedures
operative

medicine.anatomical_structure
Stents
Stress
Mechanical

Cardiology and Cardiovascular Medicine
business
Blood Flow Velocity
Biomedical engineering
Artery
Zdroj: Cardiovascular Engineering and Technology. 10:583-589
ISSN: 1869-4098
1869-408X
DOI: 10.1007/s13239-019-00437-y
Popis: In-stent restenosis (ISR) is related to local haemodynamics in the arteries after stent intervention. However, the haemodynamics of stents implanted into tapered vessels is rarely studied and remains unclear. This study aimed to study the haemodynamic performance of a stent in a tapered artery to reveal the haemodynamic differences between tapered and cylindrical stents after stent implantation and guide the stent selection for the treatment of coronary artery stenosis. Cylindrical and tapered stents were implanted into the tapered arteries. A model of a cylindrical stent implanted into a cylindrical artery was established as the contrast model. Using the finite element method, the flow velocity and wall shear stress distribution of the three models were compared. At t1, t2, t3 and t4, the flow rate of the tapered artery with tapered stents (TT) after the implantation increased by 8.59, 3.80, 12.81 and 3.66%, respectively. In addition, the wall shear stress in the tapered arteries of TT was 23.48, 36.67, 13.00 and 8.06% higher than that of the tapered arteries with cylindrical stents (TC). The implantation of a tapered stent in the tapered artery can effectively improve intravascular haemodynamics. The tapered stent allows the tapered artery to obtain better haemodynamics and reduces the probability of ISR.
Databáze: OpenAIRE