A recent meta-analysis has shown VBL to have lower bleeding rates, with no difference in survival.

最近一项总结分析表明： VBL 可降低曲张静脉的出血率，但不能改变患者的生存率。

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Eighty percent of patients did not fall into the groups and were at considerably lower risk of serious bleeding.

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Even if the bleeding risk is lower than 5%, it could easily be too much of a risk for many doctors.

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The trial, widely known as the CRASH-2 trial, published in the Lancet, showed the drug could lower the risk of trauma victims bleeding to death by up to 30 per cent.

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