{"title":"Development of a Microsensor to Minimize Post Cataract Surgery Complications","authors":"M. Mottaghi, F. Ghalichi, H. Badri Ghavifekr, H. Niroomand Oskui","volume":20,"journal":"International Journal of Biomedical and Biological Engineering","pagesStart":285,"pagesEnd":289,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/10574","abstract":"This paper presents design and characterization of a\r\nmicroaccelerometer designated for integration into cataract surgical\r\nprobe to detect hardness of different eye tissues during cataract\r\nsurgery. Soft posterior lens capsule of eye can be easily damaged in\r\ncomparison with hard opaque lens since the surgeon can not see\r\ndirectly behind cutting needle during the surgery. Presence of\r\nmicrosensor helps the surgeon to avoid rupturing posterior lens\r\ncapsule which if occurs leads to severe complications such as\r\nglaucoma, infection, or even blindness. The microsensor having\r\noverall dimensions of 480 \u03bcm x 395 \u03bcm is able to deliver significant\r\ncapacitance variations during encountered vibration situations which\r\nmakes it capable to distinguish between different types of tissue.\r\nIntegration of electronic components on chip ensures high level of\r\nreliability and noise immunity while minimizes space and power\r\nrequirements. Physical characteristics and results on performance\r\ntesting, proves integration of microsensor as an effective tool to aid\r\nthe surgeon during this procedure.","references":"[1] Polla, D. L., Erdman, A. G., Robbins, W. P., Markus, D. T., Diaz-Diaz,\r\nJ., Rizq, R., Nam, Y.,Brickner, H.T., Krulevitch, P., and Wang, A.,\r\n2000, \"Microdevices in Medicine\", Ann Rev of Biomed Eng, 2:552-572.\r\n[2] Optikon \"Pulsar2 minimal stress\" series, Optikon Inc, Available:\r\nhttp:\/\/www.optikon.com\r\n[3] Alcon Inc, Available: http:\/\/www.alcon.com , Bausch & Lomb Inc,\r\nAvailable: http:\/\/www.bausch.com\r\n[4] C. F. Breads, Structural Vibration: Analysis and Damping, New York:\r\nJohn Willy & Sons Inc, 1996, pp. 47-52.\r\n[5] Lobontiu, N. O., Mechanical Design of Microresonators, New York:\r\nMcGraw HILL, 2004, pp. 3-22.\r\n[6] J. B. Starr, \"Squeeze-film damping in solid-state accelerometers\",\r\nTechnical Digest, IEEE Solid State Sensor and Actuator Workshop,\r\n1990, pp. 44-47.\r\n[7] T. W. Roszhart, \"The effect of thermoelastic internal friction on the Q\r\nof micromachined silicon resonators\", Technical Digest on Solid-State\r\nSensor and Actuator Workshop, 1990, pp. 13-16.\r\n[8] X. Zhang and W. C. Tang, \"Viscous Air Damping in Laterally Driven\r\nMicroresonators,\" Sensors and Materials, v. 7, no. 6, 1995, pp.415-430.\r\n[9] A. N. Cleland, and M. L. Rourkes, \"Noise processes in nanomechanical\r\nResonators\", Journal of Applied Physics, 92(5), 2002, pp. 2758-2769.","publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 20, 2008"}