Analysis of thermographic images in an extravasation model of intravenous infusion in healthy adults

本研究的目的是开发识别外渗的客观指标。受试者包括六名健康男性和女性，他们使用热成像技术观察外渗情况。作为外渗模型，通过插入前臂皮下组织的导管以1.7ml/min的速度滴注生理盐水。作为对照组，通过放置在对侧前臂静脉中的导管以相同的速率滴注生理盐水。我们使用超声检查观察输注前后导管的位置和皮下组织的厚度。从输注开始起每 10 秒进行一次导管尖端周围的热成像。在所有受试者中，热成像显示开始输注后 2 分钟内导管尖端出现低温区域。这些结果表明热成像可用于以快速且非侵入性的方式识别外渗。

The purpose of this study was to develop objective indicators for identifying extravasation. Subjects comprised six healthy men and women who underwent observation for extravasation using thermography. As a model of extravasation, saline was drip-infused at 1.7 ml/min through a catheter inserted into the subcutaneous tissue of the forearm. As a control group, saline was drip-infused through a catheter placed in a vein in the contralateral forearm at the same rate. We observed the position of the catheter and the thickness of the subcutaneous tissue both before and after infusion using ultrasonography. Thermographic imaging around the tip of the catheter was performed every 10 s from the start of infusion. In all subjects, thermography showed a low-temperature region appearing at the catheter tip within 2 min of starting infusion.These results suggest that thermography can be used to identify extravasation in a fast and non-invasive manner.