Why is a shunt put in for leg angioplasty?

A shunt is used during leg angioplasty to maintain blood flow to the affected area while the procedure is being performed. It helps to temporarily bypass the narrowed or blocked artery, ensuring that blood continues to circulate to the tissues. This is crucial for preventing ischemia and potential tissue damage during the intervention. Additionally, the shunt allows for better visualization and access to the area being treated.