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Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Abstract: During infragenicular bypass, internal occlusion of the distal vessel avoids unnecessary dissection and potentially damaging use of external clamps or vessel loops while improving exposure and patency. This technique is especially useful in patients with small or calcific vessels in whom distal reconstruction is necessary for limb salvage.
Which is the apt title for the abstract? option1: Internal vessel occlusion: an improved technique for small vessel anastomosis. option2: Accumulating evidence: using meta-analysis to carry out research reviews in pediatrics.
Output:
Internal vessel occlusion: an improved technique for small vessel anastomosis.