Development and Validation of an Acute Large Animal Model for Type A Aortic Dissection

Area of Science:

• Cardiovascular Research
• Surgical Innovation
• Animal Models

Background:

• Aortic dissection animal models are crucial for advancing clinical diagnostics and therapeutics.
• Stanford type A aortic dissection presents significant clinical challenges.
• Existing models may not fully replicate human pathophysiology.

Purpose of the Study:

• To establish a novel, acute in vivo large animal model of Stanford type A aortic dissection.
• To combine open surgical and endovascular techniques for a hybrid approach.
• To create a reproducible platform for evaluating diagnostic and therapeutic strategies.

Main Methods:

• A standardized protocol was applied to six pigs to induce aortic dissection.
• A hybrid approach involving sternotomy and catheter-based techniques was employed.
• Animals were monitored for 12 hours post-intervention, followed by aortic analysis.

Main Results:

• The dissection model was successfully created in 5 out of 6 animals.
• Clinical signs such as adventitial hematoma and wall separation were observed.
• The procedure was technically feasible with no immediate complications in most animals.

Conclusions:

• A standardized, reproducible, and robust large animal model for acute Stanford type A aortic dissection was developed.
• The hybrid model accurately mimics human aortic dissection features.
• This model serves as a valuable tool for preclinical research and treatment development.