You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is In all of the following, sympathectomy is effective except one - and explain in detail?
Sympathectomy is of no value in intermittent claudication as sympathectomy does not influence muscle blood flow. Blood flow in the skin but not in the muscle is controlled by sympathetic nervous system. If the arterial supply is inadequate, ischemic changes in the skin may be relieved by sympathetic blockage but the impaired blood flow to muscles is unlikely to improve.
Possible indications for svmpathectomy.

Ischemic disorders mainly of the limbs.
Buerger's ds.
Raynand's ds.
Arterial injury or embolism
Acrocyanosis
Erythrocyanosis
Frost bite
Hyperhydrosis
Causalgia
Visceral pain
For healing of an amputation stump
Atherosclerotic ischemia of limb