糖尿病的发病率逐渐增加，中国糖尿病的患者数量早就超过1亿人，对糖尿病患者来说，测定血糖是一个必须经常进行的检测，而常规的血糖检测方法必须采集血液，采血一般通过手指针刺或静脉穿刺，毕竟会给患者带来一定伤害。另外常规血糖检测难以进行实时分析，这给通过药物控制血糖带来一定局限。那么有没有办法采用更简单的方法，例如通过一个感受器来分析血糖，这样一方面能避免采集血液带来的痛苦，另一方面可以进行连续分析。这样的方法对研究某些药物和生活习惯的效果，以及目前的可穿戴医疗设备，都是一种重要的技术。

最近有科学家真的开发出这种设备，经过人体实验后，发现不会给患者带来痛苦，检测的准确度能达到医疗的要求，这一研究发表在最近的Analytical Chemistry杂志上。

检测原理示意图

We present a proof-of-concept demonstration of an all-printed temporary tattoo-based glucose sensor for noninvasive glycemic monitoring. The sensor represents the first example of an easy-to-wear flexible tattoo-based epidermal diagnostic device combining reverse iontophoretic extraction of interstitial glucose and an enzyme-based amperometric biosensor. In-vitro studies reveal the tattoo sensor’s linear response toward physiologically relevant glucose levels with negligible interferences from common coexisting electroactive species. The iontophoretic-biosensing tattoo platform is reduced to practice by applying the device on human subjects and monitoring variations in glycemic levels due to food consumption. Correlation of the sensor response with that of a commercial glucose meter underscores the promise of the tattoo sensor to detect glucose levels in a noninvasive fashion. Control on-body experiments demonstrate the importance of the reverse iontophoresis operation and validate the sensor specificity. This preliminary investigation indicates that the tattoo-based iontophoresis-sensor platform holds considerable promise for efficient diabetes management and can be extended toward noninvasive monitoring of other physiologically relevant analytes present in the interstitial fluid.

全文阅读:http://pubs.acs.org/doi/ipdf/10.1021/ac504300n