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Biomechanical assessment of the aortic root using novel force transducers
T Bechsgaard1, J L Hønge2, H Nygaard2
1Department of Engineering, Faculty of Science and Technology, Aarhus University, Finlandsgade 22, 8200 Aarhus N, Denmark; Department of Cardiothoracic & Vascular Surgery, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark; Department of Clinical Medicine, Aarhus University Hospital, Palle Juul-Jensens Boulevard 99, 8200 Aarhus N, Denmark.
Researchers developed novel implantable force transducers to measure aortic root forces during valve-sparing procedures. This technology provides direct biomechanical insights into aortic valve repair techniques.
Area of Science:
- Biomedical Engineering
- Cardiovascular Surgery
- Biomechanics
Background:
- Valve-sparing aortic valve repair is increasingly used for aortic valve insufficiency.
- Limited experimental data exists on the biomechanical effects of these surgical techniques.
- Understanding physiological aortic root forces after repair is crucial.
Purpose of the Study:
- To develop novel implantable force transducers for biomechanical analysis of aortic root repair.
- To quantify forces within the aortic root during and after surgical interventions.
Main Methods:
- Two novel force transducers were designed using rapid prototyping and instrumented with strain gauges.
- Transducers underwent calibration, demonstrating a linear relationship between applied load and output.
- Implantation and testing were performed in an 80kg porcine model.
Main Results:
- Peak annular forces ranged from 2-4N and commissural forces from 0.4-0.8N.
- Measurements were recorded in a post-cardioplegic heart with a left ventricular pressure of 111mmHg.
- Successful development and calibration of the force transducers were achieved.
Conclusions:
- Novel implantable force transducers for aortic root force measurement were successfully developed.
- These devices offer a versatile and direct system for biomechanical assessment of aortic repair.
- The study provides a foundation for further research into the biomechanics of valve-sparing aortic surgery.
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