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1、世界华人消化杂志20071017生物电阻抗胃动力测量和评价方法研究李章勇赵舒王妍沙洪任超世李章勇,赵舒,王妍,沙洪,任超世,中国医学科学院、中国协和医科大学生物医学工程研究所,天津300192李章勇,男,博士学位,重庆邮电大学生物信息学院副教授,现为中国医学科学院、中国协和医科大学生物医学工程研究所在站博士后。主要从事生物信息检测与处理,特别是医学信号的深层次提取和研究。E-mail:li9547@yahoo.com.cn国家自然科学基金项目(60471041)重庆邮电大学科学基金项目(A2004-61,A2005-80,G2005-
2、5)通讯作者:任超世,中国医学科学院、中国协和医科大学生物医学工程研究所,天津,300192,022-87891583,bmeren@tom.comAnewmethodofgastricmotilitymeasurementandevaluationbyelectricalbioimpedanceLizhangyong,Zhaoshu,Wangyan,Shahong,RenchaoshiLizhangyong,Zhaoshu,Wangyan,Shahong,Renchaoshi,InstituteofBiomedicalEnginee
3、ring,ChineseAcademyofMedicalSciences&PekingUnionMedicalCollege,Tianjin300192,ChinaSupportedbytheNationalNaturalSciencefoundationofChina(60471041)andtheScienceFoundationofChongqinguniversityofPostsandTelecommunications(A2004-61,A2005-80,G2005-5).Correspondenceto:Prof.Ren
4、chaoshi,InstituteofBiomedicalEngineering,ChineseAcademyofMedicalSciences&PekingUnionMedicalCollege,Tianjin300192,China,022-87891583,bmeren@tom.comAbstractAIM:Basedonthecognitionofelectricity-mechanismcompoundsystemtoinvestigateanoninvasivemethodofgastricmotilitymeasurem
5、entandevaluationbyelectricalbioimpedance.Developthespecialexperimentmeasurementdeviceofthemethod.METHOD:Gastricmotilitymeasurementisbeenexecutedfrombodysurfacenon-invasivelybyelectricalbioimpedance.Theimpedancegastricmotility(IGM)measurementcombinedwithasynchronizedEGGt
6、ostudytheelectricity-mechanismcharacteristicsduringdigestcourseoffood,includingrhythm,transmission,gastricemptyingandtheinfluencesofthem;WavelettransformisaddressedtoseparateandextracttheIGMsignalfrombreathingandbloodflowingsignals.Bythemeansofenergyandfreqencyspectruma
7、nalysistechnic,IGMandEGGsignalscanbeclassifyaccordingtothedominantpoweranddominantfrequency.ThegastricmotilityparametersofEGGandIGMtobesetupandcalculated,whichincluderhythm,frequencyspectrum,powerspectrum,dynamicspectrum,frequencyinstabilitycoefficient(FIC),powerinstabi
8、litycoefficient(PIC)andsoon.RESULTS:Anoninvasivemethodofgastricmotilitymeasurementandevaluationbyelectricalbio