【摘要】 目的为实现皮肤软组织定向扩张,设计基于磁锚定技术的皮肤软组织定向扩张装置。方法根据磁锚定技术原理提出了用磁流体替代生理盐水作为皮肤软组织扩张装置的填充液,置入皮下后外加锚定磁体,在磁场力作用下引导其定向扩张。体外模拟实验测试其定向牵引力。以实验兔为模型观察其定向扩张效果。结果磁力学测试结果显示锚定磁体与30 mL磁流体在零距离时可产生大约9 N的吸力,随着二者距离增大,磁力逐渐下降,在位移10 mm时仍有2.36 N的吸力。初步动物实验显示,锚定磁体能够在不同方向上对扩张球囊产生良好的定向扩张牵引力。结论基于磁锚定技术皮肤软组织定向扩张装置能够实现定向扩张功能。更多还原

【Abstract】 Objective To realize the directional expansion of skin soft tissue, a device based on magnetic anchor technique is designed. Methods According to the principle of magnetic anchor technique, the magnetic fluids was used as the filling liquid of skin soft tissue expansion device instead of normal saline. Then the skin soft tissue expansion device was placed under the skin and anchor magnet was applied to guide its directional expansion under the action of magnetic force. The directional traction force was tested in vitro. Experimental rabbits were used as models to observe the directional expansion effect. Results The results of magnetic mechanics test showed that the suction of anchor magnet and 30 mL magnetic fluid can produce about 9 N at zero distance. With the increase of their distance, the magnetic force decreased gradually, and there was still 2.36 N suction at the displacement of 10 mm. Preliminary animal experiments showed that the anchor magnet can produce good directional dilatation traction on dilated balloon in different directions. Conclusion Based on magnetic anchor technique, the skin soft tissue directional expansion device can realize directional expansion function.更多还原