This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'Which one of the following is not a wound closure technique ? \nSelect and explain. \nA. Paial thickness skin graft, B. Composite graft, C. Vascular graft, D. Musculo-cutaneous graft', 'role': 'user'}, {'content': 'Answer: C \nExplanation: vascular graft is used to redirect blood flow in a region of the body. It is commonly performed due to inadequate blood flow (ischemia) and as a pa of organ transplantation. In general, someone&;s own vein is the preferred graft material (or conduit) for a vascular bypass, but other materials such as ePTFE, dacron or a different person&;s vein (allograft) are also commonly used. Aeries can also be redirected and serve as vascular grafts. A surgeon sews the graft to the target vessel by hand using surgical suture, creating a surgical anastomosis. A composite graft is a small graft containing skin and underlying cailage or other tissue. Donor sites include, for example, ear skin and cailage to reconstruct nasal alar rim defects.', 'role': 'assistant'}]