Surgery General 1e2c36f9 Which of the following is not true about use of graft in vascular surgery A Autologus saphenous vein achieves superior patency rates to prosthetic materials especially in femorodistal bypass B The patency of the PTFE grafts may be improved by interposition of a vein cuff at proximal anastomosis C Doppler ultrasound assessment is the method of choice for quality assuarance on completion of operative procedure D In the absence of specific contraindications aspirin should be prescribed for all the patients of peripheral vascular disease High-Yield Explanation No explanation provided.