A naturally shaped silicone ventricle evaluated in a mock circulation loop: a preliminary study

Area of Science:

• Biomedical Engineering
• Cardiovascular Research
• Medical Device Development

Background:

• Mock circulation loops are essential for preclinical evaluation of cardiac assist devices.
• A realistic, flexible ventricle model is needed for accurate flow visualization around ventricular assist device (VAD) inflow cannulae.
• Current models lack the anatomical fidelity and dynamic motion of a failing human heart.

Purpose of the Study:

• To design and construct a naturally shaped, flexible left ventricle.
• To evaluate the performance of this silicone ventricle in a mock circulation loop.
• To enable detailed flow visualization studies for VAD development.

Main Methods:

• Utilized CT images from a patient with cardiomyopathic heart failure to create a 3D model.
• Fabricated a silicone ventricle based on the patient-specific 3D model and a subsequent mold.
• Integrated the silicone ventricle into a mock circulation loop for performance evaluation.

Main Results:

• Successfully designed and constructed a naturally shaped, flexible silicone left ventricle.
• The ventricle accurately mimicked the size, shape, and motion of a failing heart.
• Demonstrated successful simulation of various cardiac conditions, including rest, heart failure, and VAD support.

Conclusions:

• The patient-specific silicone ventricle is a valuable tool for mock circulation loop studies.
• This model enhances flow visualization around VAD inflow cannulae, aiding device optimization.
• The developed ventricle facilitates realistic preclinical testing of cardiac assist technologies.