Related Experiment Video
Updated: Aug 22, 2025
07:16
Author Spotlight: Development of a Novel Finite Element Analysis Model for Improved Orthognathic Surgical Techniques
Published on: October 20, 2023
1.4K
Influence of different postballoon expansion procedures: A finite element analysis
Hongshuai Cao1, Heng Wu2, Jiasong Li1
1Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
Medical Physics
|November 7, 2022
Summary
The POT/kiss/POT technique offers better stent fit and less side branch occlusion for coronary bifurcation lesions compared to POT/side/POT. However, POT/kiss/POT may lead to poorer stent deformation and increased vessel wall stress.
Area of Science:
- Cardiovascular research
- Biomechanical engineering
- Interventional cardiology
Background:
- Postballoon expansion is crucial for adequate stent deployment in coronary bifurcation lesions.
- Current recommended techniques include proximal optimization technique (POT)/side/POT and POT/kiss/POT.
- A biomechanical comparison of these two techniques is lacking.
Purpose of the Study:
- To evaluate and quantify biomechanical differences between POT/side/POT and POT/kiss/POT strategies.
- To provide a biomechanical basis for clinical decision-making in treating coronary bifurcation lesions.
- To understand how biomechanical factors influence Major Cardiovascular Adverse Events (MACE).
Main Methods:
- A patient-specific coronary bifurcation model was created from CT angiography data.
- Finite element analysis was used to simulate POT/side/POT and POT/kiss/POT procedures.
- Key biomechanical parameters were quantified, including stent malapposition, side branch occlusion, stent ellipticity, minimum lumen area, and vessel wall stress.
Main Results:
- POT/kiss/POT demonstrated a lower malapposition rate (0.42% vs. 1.2%) and no stent occlusion at the side branch opening (0.00% vs. 0.20%).
- POT/kiss/POT resulted in a higher proximal main vessel stent ellipse index and a larger minimum lumen area (5.9 mm² vs. 5.6 mm²).
- POT/kiss/POT induced greater vessel wall stress compared to POT/side/POT.
Conclusions:
- Numerical simulations offer quantitative insights into postexpansion strategies for coronary bifurcation lesions.
- POT/kiss/POT provides superior stent fit and side branch patency but may increase vessel wall stress and affect stent deformation.
- This biomechanical analysis aids clinicians in understanding and selecting optimal postexpansion techniques.
Related Concept Videos
01:27Pressure and Volume in an Adiabatic Process
2.8K
Free expansion of a gas is an adiabatic process. However, there are few differences between free expansion and adiabatic expansion. During free expansion, no work is done, and there is no change in internal energy. But, for an adiabatic expansion, work is done, and there is a change in internal energy. During an adiabatic process, the relation between the pressure and volume is obtained from the condition for the adiabatic process, that is,
2.8K
01:20Work Done in an Adiabatic Process
3.4K
Consider the adiabatic compression of an ideal gas in the cylinder of an automobile diesel engine. The gasoline vapor is injected into the cylinder of an automobile engine when the piston is in its expanded position. The temperature, pressure, and volume of the resulting gas-air mixture are 20 °C, 1.00 x 105 N/m2, and 240 cm3 , respectively. The mixture is then compressed adiabatically to a volume of 40 cm3. Note that, in the actual operation of an automobile engine, the compression is not...
3.4K
01:27Thermal expansion and Thermal stress: Problem Solving
1.3K
San Francisco's Golden Gate Bridge is exposed to temperatures ranging from -15 °C to 40 °C. At its coldest, the main span of the bridge is 1275 m long. Assuming that the bridge is made entirely of steel, what is the change in its length between these temperatures?
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
To solve the problem, first, identify the known and unknown quantities. The initial length (L) of the bridge is 1275 m, the coefficient of linear expansion (α) for steel is 12 x 10-6/°C, and the change in...
1.3K
01:08Bending of Members Made of Several Materials
248
In analyzing a structural member composed of two different materials with identical cross-sectional areas, it is crucial to understand how their distinct elastic properties affect the member's response under load. The analysis involves assessing stress and strain distributions using the transformed section concept, which accounts for variations in material properties.
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
Hooke's Law determines stress in each material, stating that stress is proportional to strain but varies due to each...
248
01:21Deformations in a Transverse Cross Section
298
When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...
298
01:18Residual Stresses in Bending
237
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
237