Study on collateral circulation after significant stenosis of superficial femoral artery by CTA and its application in using anterolateral femoral flap
Study on collateral circulation after significant stenosis of superficial femoral artery by CTA and its application in using anterolateral femoral flap
Objective:To assess the degree of stenosis and collateral circulation in the superficial femoral artery(SFA)us-ing CTA,and the collateral systems developed from deep femoral artery(DFA)and descending branch of lateral circumflex femoral artery(DBLCFA)after significant stenosis of SFA.Methods:Patients who underwent CTA examination of lower extremi-ty arteries in our hospital from January 2019 to June 2023 and had significant bilateral SFA stenosis were selected.The de-gree of SFA stenosis and the number and size of collateral vessels were measured using the established scoring systems.Then the number of collateral vessels developed from DFA and DBLCFA was compared.Results:As the severity of SFA stenosis increased,larger and more collateral vessels were more likely to be seen on CTA.The collateral vessels developed by DFA were more than those formed by DBLCFA.After significant SFA stenosis,only 8.1％of patients had collateral vessels from DBLCFA alone.Conclusion:When planning to produce an anterolateral thigh flap,it is advisable to perform preoperative CTA in the patient to assess the number and size of collateral vessels,which are important for clinical flap selection.
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