Atherosclerosis Alters Loading-Induced Arterial Damage: Implications for Robotic Surgery.

Area of Science:

• Vascular biology
• Biomedical engineering
• Surgical robotics

Background:

• Robotic surgery lacks haptic feedback, risking tissue damage.
• Understanding force-induced arterial injury is key for surgical safety.

Purpose of the Study:

• To investigate acute and chronic effects of clamping force on wildtype and atherosclerotic mouse arteries.
• To assess the impact of force load on arterial structure and function.

Main Methods:

• In vivo arterial clamping (0.0N, 0.6N, 1.27N) for 2 minutes in wildtype and atherosclerotic mice.
• Histological analysis (Verhoeff's-Van Gieson, Osteopontin, CD45, CD105) at multiple time points.
• Assessment of endothelium-dependent and -independent vasodilatation.

Main Results:

• Clamping impaired vasodilatation in wildtype arteries, with recovery after one month.
• Elastic membrane flattening occurred in both genotypes; reversal was observed in wildtype but not atherosclerotic arteries.
• Osteopontin and CD45 levels indicated SMC phenotypic changes and inflammation, with varying recovery patterns.

Conclusions:

• Arterial clamping causes differential acute and long-term injury to healthy and diseased arteries.
• Findings highlight the need for force-sensitive haptic feedback in robotic surgery.