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首例人体低温保存 未来真的能够醒来吗?

2017-08-15 15:45:07   中国网

死神的镰刀已经挥下,但伤口还未扩大。阿伦·德雷克一直做的,是给这死亡的进程按下暂停键。但在人体进入最后的低温保存阶段之前,他必须尽可能保证,“病人”不受或者少受冷冻损害。

冷冻最大的敌人,是水在低温下结成的冰晶——冰晶会刺破细胞内壁,造成极大损伤。所以,冷冻机构必须用特殊的防冻剂置换人体内的血液和水分。

和阿伦·德雷克一起上阵的,是山东大学齐鲁医院心外科医生、麻醉专家以及体外循环灌注师。他们从展文莲的颈部和股部建立双通路体外循环,在特制的低温手术台上,将其体温降低到18℃左右。

然后,透明的、乳白色的防冻剂,缓缓注入展文莲体内。降温仍在进行,防冻剂变得越来越浓稠。它会成为固体,但它不会结冰。这个过程,叫做“玻璃化”。

灌流最终完成,已是近6个小时之后。接着,展文莲的身体被转移到大尺度程序降温床上。阿伦·德雷克对这张床赞赏有加,美国阿尔科没有这样的设备。

这是世界上唯一一台可以连续将整个人体从常温降到-190℃左右的自动控制设备。它使用液氮蒸气进行快速降温,配置了多个温度传感器,可以实时监测数十个位置的温度变化。

整套流程下来,耗时55小时。

阿伦·德雷克对手术效果很满意。“你看,这有一条完美的降温曲线。”他拿出手机,显得很兴奋,“曲线下降得很平滑,意味着我们的灌流效果很好,病人体内没有或者只有少量的冰晶。”

2

对银丰研究院来说,展文莲也是他们真正冷冻的第一具人体。

银丰研究院由银丰生物工程集团有限公司(以下简称银丰生物)于2015年出资成立。它提供的介绍里写道,这是一家基因工程、干细胞技术开发,人体细胞、组织及器官低温保存与复苏,细胞治疗及再生医学转化的专业研究机构。

同年,银丰研究院发起设立了山东省银丰生命科学公益基金会,旨在推动生命科学的发展。它资助4项研究计划:生命延续研究计划、组织器官银行计划、(干)细胞医学转化研究计划和基因工程计划。

基金会负责人贾森并不愿意让人觉得,银丰研究院“只是”一家人体冷冻公司。毕竟,人体冷冻像是狂想。在美国,它被质疑是在兜售不可能兑现的承诺。

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