北京生物医学工程
北京生物醫學工程
북경생물의학공정
Beijing Biomedical Engineering
2015年
5期
489-494
,共6页
胸阻抗%仪器设计%临床数据分析
胸阻抗%儀器設計%臨床數據分析
흉조항%의기설계%림상수거분석
chest impedance%medical device design%clinical data analysis
目的:为了经济、快捷、全面地实现心功能的无创检测,基于胸阻抗法成功研发了一种心功能无创检测分析仪,可方便地实现胸阻抗信号、心电信号、心音信号的同步检测分析,从而实现对患者心功能的无创综合评价。该方法无毒无创,操作简单,完全可以实现家用化普及。方法本文首先描述了系统的硬件模块构成,说明了胸阻抗信号的采集过程。其次,使用FPGA芯片与DDS芯片构成系统的控制与信号发生核心,指出了恒流源的精度等性能指标。再次,指出了胸阻抗信号处理的要点,运用互感原理实现干扰信号的隔离。最后,介绍了仪器软件功能,并展示了仪器软件实测结果。结果通过临床试验,对胸阻抗法与超声多普勒法检测的数据结果进行t检验,结果表明二者具有一致性。结论由于采用了先进的特征点判别方法,该设备具有较高的临床检测精度和较好的临床适用性,可满足临床心功能无创检测和评估的要求。
目的:為瞭經濟、快捷、全麵地實現心功能的無創檢測,基于胸阻抗法成功研髮瞭一種心功能無創檢測分析儀,可方便地實現胸阻抗信號、心電信號、心音信號的同步檢測分析,從而實現對患者心功能的無創綜閤評價。該方法無毒無創,操作簡單,完全可以實現傢用化普及。方法本文首先描述瞭繫統的硬件模塊構成,說明瞭胸阻抗信號的採集過程。其次,使用FPGA芯片與DDS芯片構成繫統的控製與信號髮生覈心,指齣瞭恆流源的精度等性能指標。再次,指齣瞭胸阻抗信號處理的要點,運用互感原理實現榦擾信號的隔離。最後,介紹瞭儀器軟件功能,併展示瞭儀器軟件實測結果。結果通過臨床試驗,對胸阻抗法與超聲多普勒法檢測的數據結果進行t檢驗,結果錶明二者具有一緻性。結論由于採用瞭先進的特徵點判彆方法,該設備具有較高的臨床檢測精度和較好的臨床適用性,可滿足臨床心功能無創檢測和評估的要求。
목적:위료경제、쾌첩、전면지실현심공능적무창검측,기우흉조항법성공연발료일충심공능무창검측분석의,가방편지실현흉조항신호、심전신호、심음신호적동보검측분석,종이실현대환자심공능적무창종합평개。해방법무독무창,조작간단,완전가이실현가용화보급。방법본문수선묘술료계통적경건모괴구성,설명료흉조항신호적채집과정。기차,사용FPGA심편여DDS심편구성계통적공제여신호발생핵심,지출료항류원적정도등성능지표。재차,지출료흉조항신호처리적요점,운용호감원리실현간우신호적격리。최후,개소료의기연건공능,병전시료의기연건실측결과。결과통과림상시험,대흉조항법여초성다보륵법검측적수거결과진행t검험,결과표명이자구유일치성。결론유우채용료선진적특정점판별방법,해설비구유교고적림상검측정도화교호적림상괄용성,가만족림상심공능무창검측화평고적요구。
Objective A kind of heart function analytical device is invented based on impedance cardiography method to detect heart function economically, fast and comprehensively? The device can detect and analyze ICG, ECG and PCG signals synchronously, so comprehensive noninvasive assessment of heart function in patients can be achieved? Methods This article introduces the system and main hardware modules of the device, describes the process of ICG acquisition? FPGA and DDS are used as hardware core and performance indices of the device are pointed out? Key points of signal processing are presented and the electromagnetic principle of mutual inductance is used in this part? Results By analyzing and comparing clinical data, this article indicates that the device can gain more accurate clinical test data and has better clinical applicability? Conclusions Because of its advanced feature points’ extraction method, this device meets the requirements of clinical examination and assessment for heart function.