a wireless- implantable micro system
DESCRIPTION
seminar pptTRANSCRIPT
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A WIRELESS- IMPLANTABLE MICRO SYSTEM FOR CONTINUES BLOOD GLUCOSE MONITORING
ANOOP PRoll No:07Reg. No:CTAHEEC013
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ABSTRACT
• Remotely powered implantable micro system • Consists of a micro fabricated glucose
biosensor flip-chip bonded to a transponder chip
• Transponder chip measures the output signal of the glucose biosensor and transmits to the external reader
• Chip can measure the sensor output current ranging from 1 nA to 1 A
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LITERATURE SURVEY
1. NON-CONTINOUS BLOOD GLUCOSE MONITORING • Consist of a blood glucose meters• small drop of blood is needed to place on
test strip
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LITERATURE SURVEY
2. Continues wired blood glucose monitoring• Used conventional electrochemical glucose
sensors• Large sizes• Wired
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DESIGN
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DESIGN
• Microfabricating the glucose sensor• Inegrating all the interfacing circuits into a
integral chip(TRANSPONDER CHIP)• Attaching the microfabricated glucose sensor
to the transponder chip using flip chip bonding
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SYSTEM OVERVIEW AND FUNCTIONING
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SYSTEM OVERVIEW AND FUNCTIONING
• Monitoring system consisting of an implantable microsystem and an external reader.
• Microsystem measures the blood glucose concentration and transmits the measured data to the external reader
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GLUCOSE SENSOR
• Amperometric electrochemical biosensor• Consists of three electrodes: 1)a working electrode(WE) 2)a reference electrode(RE) 3)a counter electrode(CE)
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ELECTRODES
1. WORKING ELECTRODE• Act as a surface on which the electrochemical
reaction takes place between the glucose and an enzymatic layer
• It catalyzes the oxidation of glucose to gluconic acid
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ELECTRODES
2. REFERENCE ELECTRODE• The reference electrode is used to measure the
solution (blood or interstitial fluid) potential
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ELECTRODES
3. COUNTER ELECTRODE• An inert conductor (gold) that supplies the current
required for the electrochemical reaction
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TRANSPONDER CHIP
1. RF FRONT-END BLOCK
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TRANSPONDER CHIP
2. DATA-ACQUISITION
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EXTERNAL READER
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ADVANTAGES
• Small size of the implant• No need of oxygen• Use of passive telemetry link
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CONCLUSION
• Miniaturization procedure for a wireless-implantable microsystem for continuous blood glucose monitoring
• Low cost procedure• Microsystem implanted just underneath the
skin
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REFERENCES
• IEEE Trans.Biomed. Eng., vol. 35, no. 7, pp. 526–532, Jul. 1988.
• IEEE Trans. Biomed.Eng., vol. 41, no. 10, pp. 937–942, Oct. 1994.
• Biosensors Bioelectron., vol. 10, pp. 485–494, 1995
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THANK YOU