Patch type sensor module for diagnosis of acute myocardial infarction

Myocardial infarction is getting more attention in human health care system by the busy daily activity and prolonged human life span. Myocardial infarction is not easy to detect in early stage. Whether it is acute or not, it can be chronically fatal without proper detection and treatment in early stage of warning signs. Our research is focused on the wearable device that detects myocardial infarction by monitoring cardiac markers from tiny amount of blood sample. Our device consist with three parts, blood sampling part, electrochemical sensor part and signal processing part. Blood sampling part extracts about 10ul of blood sample with micro-needles, then the blood is transported to electrochemical sensor through polymer parylene coated microfluidic channels. Electrochemical sensor detects electro-chemical current generated by oxidation-reduction cycle at the three dimensional integrated micro-electrodes. Signal processing part includes traditional signal conditioners such as i-v converter, amplifier and filter, and data processing units such as A/D, D/A convertors and micro-processor. The usefulness of out device is extended by providing combined on line communication capability with Bluetooth local area communication and wifi and/or 3G Wireless networks. Every realtime sensor data and status information from the sensor modules are collected by centralized server located in hospital. With our myocardial infarction diagnosis device, the patients´ unexpected heart attacks can be prevented and the hospital may provide controllable risk caring for the disease without hospitalization of the patients.