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.
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Question: Question: Is terlipressin more effective in decreasing variceal pressure than portal pressure in cirrhotic patients?
Answer: Our results demonstrate that terlipressin produces significant and prolonged decreases in variceal pressure and variceal wall tension and has intrinsic effects on portal pressure and systemic hemodynamics. Variceal pressure provides a better assessment of the effects of terlipressin administration on esophageal varices than hepatic venous pressure gradient.

Answer: yes

Question: Question: Do norepinephrine and ephedrine counteract the increase in cutaneous microcirculation induced by spinal anaesthesia?
Answer: Improved skin perfusion induced by spinal anaesthesia was not counteracted by the use of norepinephrine or ephedrine.

Answer: no

Question: Question: Does hepaticoplasty prevent cholangitis after pancreaticoduodenectomy in patients with small bile ducts?
Answer: The ratio of postoperative reduction of the bile duct diameter to that before surgery was found to be the only risk factor for cholangitis after PD. Patients with a small bile duct of 15mm in diameter preoperatively might benefit from hepaticoplasty to widen the bile duct diameter and prevent cholangitis after PD.

Answer:
yes