Shear-thinning nanocomposite hydrogels for the treatment of hemorrhage.

Shear-thinning nanocomposite hydrogels for the treatment of hemorrhage.
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DOI:
10.1021/nn503719n
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发表时间:
2014-10-28
期刊:
影响因子:
17.1
通讯作者:
Olsen, Bradley D.
Olsen, Bradley D.
中科院分区:
材料科学1区
文献类型:
--
作者:
Gaharwar, Akhilesh K.;Avery, Reginald K.;Assmann, Alexander;Paul, Arghya;McKinley, Gareth H.;Khademhosseini, Ali;Olsen, Bradley D.

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内伤是战场创伤后死亡的主要原因。虽然几种手术方法,如使用纤维蛋白胶和组织粘合剂已经商业化以实现止血,但这些方法难以在战场上使用,并且不能用于不可压缩的伤口。在这里,我们提出了剪切变稀纳米复合水凝胶组成的合成硅酸盐纳米片和明胶作为可注射止血剂。这些材料被证明可以减少77%的体外凝血时间,并形成稳定的凝块-凝胶系统。体内试验表明,纳米复合材料是生物相容的,并能够促进止血,否则致命的肝裂伤。可注射性、快速机械恢复、生理稳定性和促进凝血的能力的组合导致止血剂用于在院外紧急情况下治疗不可压缩的伤口。
Internal hemorrhaging is a leading cause of death after traumatic injury on the battlefield. Although several surgical approaches such as the use of fibrin glue and tissue adhesive have been commercialized to achieve hemostasis, these approaches are difficult to employ on the battlefield and cannot be used for incompressible wounds. Here, we present shear-thinning nanocomposite hydrogels composed of synthetic silicate nanoplatelets and gelatin as injectable hemostatic agents. These materials are demonstrated to decrease in vitro blood clotting times by 77%, and to form stable clot-gel systems. In vivo tests indicated that the nanocomposites are biocompatible and capable of promoting hemostasis in an otherwise lethal liver laceration. The combination of injectability, rapid mechanical recovery, physiological stability, and the ability to promote coagulation result in a hemostat for treating incompressible wounds in out-of-hospital, emergency conditions.
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