新型“超级疏水生物传感器”可以监测之前难以测量的“无意识出汗”(皮肤蒸发失水量),这为可穿戴技术的持续跟踪提供了可能,有助于评估身体的温度调节、皮肤健康、疾病状况、神经系统活动以及检测其他健康生物标记物。

汗液中包含有助于医生做出诊断的生物标记物。可穿戴传感器可用于监测人体出汗速率,并提供关于皮肤、神经系统活动和潜在健康状况的信息。然而,并非所有汗液都是相同的,一些汗液无法通过现有传感器进行测量。一种新近开发的“超级疏水生物传感器”可以作为一种诊断工具,用于检测此类汗液。

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该传感器由工程科学和力学副教授胡安宇·“拉里”·程开发,其具备超级疏水材料,可以测量汗液蒸汽而不吸收水。该研究论文发表在《ACS Nano》杂志上。

感性或液态透析是人可以感知到的汗液,例如在强度运动时。穿戴式传感器可以提供连续、非侵入性的此类汗液跟踪。但无意识出汗与之不同。这是仅从皮肤中失去水分的情况,出汗速率在低强度运动或休息时会极小,测量它是很困难的,据程称。

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“监测无意识出汗对于评估皮肤健康和疾病状况,例如湿疹和伤口愈合,以及潜在的健康状况,例如疼痛或焦虑是非常有兴趣的,”程说。“检测出汗率和损失的皮肤界面设备目前仅限于有感知的出汗,不适用于蒸发状态中的无意识出汗。”

程开发了一款原型超级疏水汗液传感器,用于测量无意识出汗的蒸汽。该材料-由一个超吸水水凝胶复合物和一个多孔基底上的两个超疏水织物层夹层组成-允许汗液蒸汽的渗透,同时防止紧贴皮肤的汗珠中的外部水滴影响到传感器。该传感器可与柔性无线通信和电源模块集成,可在身体不同位置持续监测出汗率。

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“对人体实施概念演示展示了持续衡量身体的温度调节和皮肤屏障功效的可行性,”程说。“这使评估热舒适度、疾病状况和神经系统活动成为可能,并为检测汗蒸汽中的其他与健康相关的生物标记物提供低成本设备平台,成为智能医疗和个性化医学的下一代汗液传感器。”

参考文献:“皮肤界面超级

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作者 刘军

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