The foremost components of the sensor be a pH-sensitive polymer (hydrogel) and a micro constraint sensor. The polymer cover a colossal mass of river and shrink or inflate surrounded by retort to the varying pH-value. It be sandwich involving the micro pressure sensor and a permeable, silicon indemnity. The cover contains a reservoir beside bicarbonate electrolyte, inundated with a gas-permeable membrane.
Carbon dioxide flow from the belly through the gas-permeable membrane into the electrolyte, where on earth it initiate a antipathy that lower the pH-value. The pH-sensitive polymer try to swell in response to this. However, because it is in a confined universe it exert a pressure which the pressure sensor subsequently measures. Conversely, if the carbon dioxide reduction falls, the pH-value increase and the pressure generate by the polymer fade away.
Due to its minimum size (2.9 mm x 0.9 mm x 0.7 mm) the sensor glibly fits in a catheter slant. The catheter is insert via the proboscis into the stomach and trash in being there until the thickness have be completed. Herber present-day his sensor to detect gastrointestinal ischaemia at an untimely abide. Gastrointestinal ischaemia can make happen agony after ingestion, pain after blue-collar exertion, diarrhoea, nausea and a realistically critical injury in immensity.
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People with some medical provisos might be more likely to develop coeliac disease, for example Type 1 diabetes, thyroid problems, ulcerative colitis and certain neurological wildness, such as epilepsy.
Further the sensor can be adapted to measure other substances such as glucose or specific ions.
Sebastiaan Herber’s research is one fund by Technology Foundation STW.
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Posted on November 19th, 2008 by cholestero36
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