Carotid Artery Balloon Injury Model

Indication / Application

Cardiovascular interventional validation (e.g., Drug-Coated Balloons / DCB, Drug-Eluting Stents / DES), anti-restenosis pharmacological screening, and vascular neointimal hyperplasia mechanisms.

Modeling Method

Under fluoroscopic guidance or high-magnification microsurgery, a balloon catheter is introduced into the common carotid artery, inflated to a calibrated pressure, and retracted repeatedly to achieve uniform endothelial denudation and mechanical vessel wall injury.

Clinical Relevance 

Translational Remodeling: Porcine and rabbit carotid arteries closely mirror human clinical vascular responses to mechanical trauma. Mechanical stretching via balloon inflation triggers a synchronized cascade of vascular smooth muscle cell (VSMC) proliferation and migration, accurately simulating human post-angioplasty restenosis.

Anatomical & Hemodynamic Fidelity: The luminal diameter, wall shear stress, and compliance of porcine carotid arteries provide a clinically relevant testing platform for human-scale interventional devices (such as DCBs and stents), ensuring high-fidelity translational data for global regulatory submissions (FDA, NMPA, CE).

Key Evaluation Endpoints 

In Vivo / Surgical / Imaging:

• Fluoroscopic/Angiographic assessment of vessel patency and residual stenosis.
• High-resolution Micro-Ultrasound (Vevo system) tracking of peak systolic velocity (PSV) and luminal narrowing.
• Real-time endovascular pressure and hemodynamic monitoring.

Histopathology:

• Morphometry (Gold Standard): H&E and Verhoeff-Van Gieson (VVG) staining to quantify the area of the lumen, internal/external elastic lamina (IEL/EEL), and calculation of Intima/Media (I/M) ratio and stenosis percentage.
• Endothelialization Kinetics: Evans Blue en face staining to evaluate the rate of re-endothelialization.
• Phenotypic & Structural Profiling: Masson's trichrome for collagen deposition/fibrosis, and IHC/IF for α-SMA, Ki-67 (VSMC proliferation), and CD31/vWF (endothelial regeneration).

Molecular:

• Expression profiles of inflammatory and remodeling markers (e.g., TNF-α, IL-6, ICAM-1, MMP-2/9) via RT-qPCR or Western Blot.

Regulatory-Grade Data Package (OECD GLP, AAALAC, CMA, CNAS): As an established preclinical CRO, all cardiovascular studies at HuaTeng Biotechnology are conducted under stringent global quality guidelines. Our highly experienced surgical team utilizes standardized inflation-pressure protocols to minimize operator-dependent variability, delivering ultra-consistent Intima/Media (I/M) expansion profiles designed to withstand rigorous regulatory audits for global IND and medical device registrants.