天堂国产午夜亚洲专区-少妇人妻综合久久蜜臀-国产成人户外露出视频在线-国产91传媒一区二区三区

當(dāng)前位置:主頁 > 醫(yī)學(xué)論文 > 護理論文 >

基于充氣式無創(chuàng)血壓測量算法的研究

發(fā)布時間:2018-04-23 02:14

  本文選題:充氣測量 + 小波變換 ; 參考:《北京交通大學(xué)》2015年碩士論文


【摘要】:血壓是人體重要生理指標(biāo)之一,在疾病診斷、治療效果的觀察以及反映人體心血管功能的狀況上提供著重要的依據(jù)。有很多關(guān)于心血管系統(tǒng)的信息,比如外周阻力、心率、血容量、血管壁彈性、以及血液物理狀態(tài)等,都與血壓有著密切關(guān)系。在家庭監(jiān)測中采用電子血壓計進行測量,對心血管異常事件的預(yù)防有著重要的幫助。 目前的血壓測量方法分為有創(chuàng)法與無創(chuàng)法。有創(chuàng)法即國際認(rèn)定的金標(biāo)準(zhǔn),這樣的測量方式最為準(zhǔn)確,但是極不方便,一般限用于危重病人或開腔手術(shù)病人。無創(chuàng)法簡便易操作,在臨床上得到了廣泛的應(yīng)用。而在無創(chuàng)血壓測量方法中,袖帶氣壓式測量法其理論成熟且利于實現(xiàn),成為血壓計制造商的首選。傳統(tǒng)袖帶氣壓測量法是在上臂纏繞袖帶并在袖帶放氣的過程中進行血壓測量。本文所討論的是在腕部纏繞袖帶,并在袖帶充氣的過程中測量血壓,基于腕部方式的血壓計相對上臂式血壓計其價格低廉、使用方便,是一種理想的自助式監(jiān)測設(shè)備。 本論文基于腕部充氣的方法測量血壓,在血壓的信號采集、處理與結(jié)果驗證中做了如下工作: 1.運用袖帶內(nèi)的MPXV5050GP壓力傳感器采集靜壓力與脈搏波的混合袖帶壓,并將此信號傳輸至上位機(計算機)。 2.詳細分析了基于小波變換的脈搏波預(yù)處理方法,首先針對脈搏波的信號特點選取小波基,其次采用小波閾值去噪法來去除脈搏波噪聲,閾值去噪法分別采用強制去噪方法、默認(rèn)閾值去噪方法與給定閾值去噪方法對模擬信號去噪處理并得出信噪比對比結(jié)果,選出最佳去噪方法來去除采集的袖帶壓混合信號,并完成脈搏波與袖帶靜壓力的分離。 3.采用閾值法提取脈搏波的峰值特征點,并設(shè)定閾值排除峰值干擾點。對去除干擾的脈搏波峰值點進行高斯曲線擬合,對比了一次高斯擬合、二次高斯擬合、雙直線擬合法,并選定最佳擬合曲線來完成脈搏波峰值包絡(luò)線的繪制。 4.對原始幅度系數(shù)法進行了算法改進,更精確的找出幅度比例系數(shù)對應(yīng)的收縮壓、舒張壓位置,并完成收縮壓、舒張壓的計算。由概率統(tǒng)計學(xué)知識驗證本方法所得收縮壓、舒張壓的結(jié)果的準(zhǔn)確性。
[Abstract]:Blood pressure is one of the important physiological indicators of the human body. It provides an important basis for the diagnosis of disease, the observation of the effect of treatment and the condition of reflecting the cardiovascular function of the human body. There are many information about the cardiovascular system, such as peripheral resistance, heart rate, blood volume, blood vessel wall elasticity, and the physical state of blood, which are closely related to blood pressure. The use of electronic sphygmomanometer in family monitoring is of great help to the prevention of cardiovascular abnormalities.
The current blood pressure measurement methods are divided into the invasive method and the non invasive method. The invasive method is the international recognized gold standard, which is the most accurate, but extremely inconvenient, the general limit is used for the critical patients or the operation patients. The noninvasive method is easy to operate, and has been widely used in clinical. The traditional cuff pressure measurement is to measure the blood pressure of the cuff in the wrist and to measure the blood pressure in the process of inflating the cuff and the wrists based on the sphygmomanometer phase. The upper arm type sphygmomanometer is cheap and easy to use. It is an ideal self-service monitoring device.
Based on the method of wrist inflation, we have done the following work in the collection, processing and verification of blood pressure signals.
1. use the MPXV5050GP pressure sensor in the cuff to collect the cuff pressure of static pressure and pulse wave, and transmit the signal to the upper computer (computer).
2. the pulse wave preprocessing method based on wavelet transform is analyzed in detail. Firstly, the wavelet base is selected for the signal characteristics of the pulse wave. Secondly, the wavelet threshold de-noising method is used to remove the pulse wave noise. The threshold de-noising method adopts the coercive denoising method, the default threshold de-noising method and the given threshold de-noising method are used to denoise the analog signals. And the SNR comparison results are obtained, and the best denoising method is selected to remove the collected cuff pressure mixed signal and complete the separation of the pulse wave from the cuff static pressure.
3. the threshold method is used to extract the peak characteristic point of pulse wave, and the threshold is set to exclude the peak interference point. Gauss curve fitting is used to remove the pulse wave peak point of the interference. The first Gauss fitting, the two Gauss fitting, the double line fitting method are compared, and the best fitting curve is selected to complete the drawing of the pulse wave peak envelope.
4. the original amplitude coefficient method was improved, and the systolic pressure, the diastolic pressure position corresponding to the amplitude ratio coefficient and the calculation of systolic pressure and diastolic pressure were completed. The accuracy of the results of systolic pressure and diastolic pressure obtained by this method was verified by the knowledge of probability and statistics.

【學(xué)位授予單位】:北京交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2015
【分類號】:R443.5;TN911.7

【參考文獻】

中國期刊全文數(shù)據(jù)庫 前10條

1 張愛華;王平;丑永新;;基于動態(tài)差分閾值的脈搏信號峰值檢測算法[J];吉林大學(xué)學(xué)報(工學(xué)版);2014年03期

2 周光祥;楊丹丹;;基于自適應(yīng)閾值的提升小波去噪方法[J];桂林電子科技大學(xué)學(xué)報;2012年02期

3 王維維;蒲寶明;賀寶岳;李生金;;基于上氣測量的電子血壓計的設(shè)計與實現(xiàn)[J];計算機系統(tǒng)應(yīng)用;2012年02期

4 林辛霞;許素們;劉曉為;邵美英;葉稱梅;;腕式電子血壓計袖帶套的制作及應(yīng)用[J];護理學(xué)雜志;2011年12期

5 周玉棟;孫懷遠;葛斌;;基于MPXV5050GP的便攜式電子血壓計設(shè)計[J];現(xiàn)代儀器;2011年01期

6 李雪情;張永亮;鄭瑩瑩;占禮葵;馬祖長;孫怡寧;;基于示波法和高斯擬合的血壓測量方法[J];傳感技術(shù)學(xué)報;2010年12期

7 唐銘一;李凱;馬小鐵;;脈搏波信號時域特征提取與算法的研究[J];計算機與現(xiàn)代化;2010年04期

8 劉敬華;于紅玉;鄧軍民;;基于示波法原理的無創(chuàng)血壓測量模塊的應(yīng)用[J];中國醫(yī)療設(shè)備;2008年09期

9 張翠芳;;小波閾值降噪效果影響因素的研究[J];西安郵電學(xué)院學(xué)報;2008年05期

10 李維維;陳良龍;李衛(wèi)華;謝強;李金國;羅育坤;林朝貴;彭亞飛;鄭行春;黃崢嶸;;無創(chuàng)性脈波與有創(chuàng)性測量中心動脈壓的一致性[J];中華高血壓雜志;2008年07期

中國碩士學(xué)位論文全文數(shù)據(jù)庫 前2條

1 周昆鵬;基于SOPC的智能電子血壓計的設(shè)計[D];燕山大學(xué);2010年

2 李婧;自適應(yīng)檢測脈搏波系統(tǒng)的研究[D];北京工業(yè)大學(xué);2008年

,

本文編號:1789986

資料下載
論文發(fā)表

本文鏈接:http://www.sikaile.net/huliyixuelunwen/1789986.html


Copyright(c)文論論文網(wǎng)All Rights Reserved | 網(wǎng)站地圖 |

版權(quán)申明:資料由用戶69d59***提供,本站僅收錄摘要或目錄,作者需要刪除請E-mail郵箱bigeng88@qq.com