Given the task definition and input, reply with output. Given a passage with a question and an answer to that question, classify if the answer actually answers the question into 'yes' or 'no'. Output 'yes' if the answer answers the question and output 'no' if the answer does not answer the question.

Question: Does an increased circulating blood volume prevent hypotension after pheochromocytoma resection?
Answer: Expansion of the CBV by alpha-blocker therapy was related to lower blood pressures after resection of the pheochromocytoma. Expansion of the CBV by an alpha blocker may have increased the elastance of blood vessels. Preoperative blood volume expansion does not preclude hypotension after tumour resection. Although the CBV value itself is not a predictor for hypotension after tumour resection, pulse dye-densitometry provides values of CO and CBV simultaneously, assisting in the management of volume resuscitation and/or the need for catecholamines.
no