“超级冷冻法”能使器官保持活力_科学技术

“超级冷冻法”能使器官保持活力

文章来源：未知文章作者：enread 发布时间：2014-06-30 07:45 字体： [大中小]　进入论坛

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A new technique can preserve organs for days before transplanting them, US researchers claim.

美国研究人员宣称，一种新技术可使身体器官在移植前保存数日。

Scientists have tested the technique on rats' livers

"Supercooling" combines chilling the organ and pumping nutrients¹ and oxygen through its blood vessels².

Tests on animals, reported in the journal Nature Medicine, showed supercooled livers remained viable³ for three days, compared with less than 24 hours using current technology.

If it works on human organs, it has the potential to transform organ donation.

As soon as an organ is removed from the body, the individual cells it is made from begin to die.

Cooling helps slow the process as it reduces the metabolic⁴ rate of the cells.

Meanwhile, surgeons in the UK carried out the first "warm liver" transplant in March 2013 which used an organ kept at body temperature in a machine.

The technique being reported first hooks the organ up to a machine which perfuses the organ with nutrients.

It is then cooled to minus 6C.

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收听单词发音

1 nutrients
n.（食品或化学品）营养物，营养品( nutrient的名词复数 )
参考例句：
a lack of essential nutrients 基本营养的缺乏 Nutrients are absorbed into the bloodstream. 营养素被吸收进血液。来自《简明英汉词典》

2 vessels
n.血管( vessel的名词复数 )；船；容器；（具有特殊品质或接受特殊品质的）人
参考例句：
The river is navigable by vessels of up to 90 tons. 90 吨以下的船只可以从这条河通过。来自《简明英汉词典》 All modern vessels of any size are fitted with radar installations. 所有现代化船只都有雷达装置。来自《现代汉英综合大词典》

3 viable
adj.可行的，切实可行的，能活下去的
参考例句：
The scheme is economically viable.这个计划从经济效益来看是可行的。 The economy of the country is not viable.这个国家经济是难以维持的。

4 metabolic
adj.新陈代谢的
参考例句：
Impressive metabolic alternations have been undergone during embryogenesis.在胚胎发生期间经历了深刻的代谢变化。 A number of intoxicants are associated with metabolic acidosis.许多毒性物质可引起代谢性酸中毒。

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