In this paper a sensor is presented for the detection of carbon dioxide gas inside the stomach in order to diagnose gastrointestinal ischemia. The operational principle of the sensor is measuring the CO/sub 2/ induced pressure generation of a confined pH-sensitive hydrogel by means of a micro pressure sensor. The sensor is capable of measuring CO/sub 2/ with a response time between 2 and 4 minutes and a maximum pressure of 0.29/spl times/10/sup 5/ Pa at 20 kPa CO/sub 2/. The sensor is able to resist up to 1 M HCl acid as can be present inside the stomach. The results are very promising for real application and clinical trials are planned.
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机译：在本文中，提出了一种传感器，用于检测胃内的二氧化碳气体，以诊断胃肠道缺血。传感器的工作原理是通过微压力传感器测量封闭的pH敏感水凝胶的CO / sub 2 /诱导压力生成。该传感器能够以2至4分钟的响应时间测量CO / sub 2 /，在20 kPa CO / sub 2 /时的最大压力为0.29 / spl次/ 10 / sup 5 / Pa。该传感器能够抵抗多达1 M的HCl酸，就像胃内部一样。该结果对于实际应用非常有希望，并计划进行临床试验。
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