A simple physiologic pulsatile perfusion system for the study of intact vascular tissue

Area of Science:

• Biomedical Engineering
• Vascular Biology
• Tissue Engineering

Background:

• Perfusion vascular culture models offer controlled environments bridging cell and animal studies.
• Existing models lack the physiological complexity of native vasculature.
• There is a need for advanced systems to study vascular tissue ex vivo.

Purpose of the Study:

• To develop and validate a new vascular culture system for pulsatile perfusion of intact vascular tissue.
• To create a system that mimics physiological flow and pressure conditions.
• To assess the viability and functionality of cultured vascular segments.

Main Methods:

• Designed and constructed a system using a cam-driven syringe, peristaltic pump, and compliance chamber for pulsatile flow.
• Developed cams to simulate canine femoral and carotid artery flow patterns.
• Adjusted mean pressure (60-200 mmHg) while monitoring flow and pressure waveforms.
• Cultured porcine common carotid artery segments within the system.
• Assessed vascular segment viability using a functional assay measuring vasomotor response.

Main Results:

• The system generated pulsatile flow and allowed pressure adjustment without altering flow characteristics.
• Porcine carotid artery segments maintained viability during culture.
• Functional assays confirmed smooth muscle and endothelial cell responsiveness to vasomotor stimuli.
• The system successfully replicated physiological flow parameters.

Conclusions:

• The developed pulsatile perfusion system is effective for culturing intact vascular tissue.
• This model maintains vascular viability and cellular function, mimicking in vivo conditions.
• The system provides a valuable tool for vascular research, bridging in vitro and in vivo models.