Article(id=1244321222117409754, tenantId=1146029695717560320, journalId=1244284848500682798, issueId=1244321215637209904, articleNumber=null, orderNo=null, doi=10.16156/j.1004-7220.2025.05.031, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1736179200000, receivedDateStr=2025-01-07, revisedDate=1739203200000, revisedDateStr=2025-02-11, acceptedDate=null, acceptedDateStr=null, onlineDate=1774598897722, onlineDateStr=2026-03-27, pubDate=1759248000000, pubDateStr=2025-10-01, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1774598897722, onlineIssueDateStr=2026-03-27, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1774598897722, creator=13701087609, updateTime=1774598897722, updator=13701087609, issue=Issue{id=1244321215637209904, tenantId=1146029695717560320, journalId=1244284848500682798, year='2025', volume='40', issue='5', pageStart='1079', pageEnd='1366', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1774598896178, creator=13701087609, updateTime=1774599509568, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1244323788452639476, tenantId=1146029695717560320, journalId=1244284848500682798, issueId=1244321215637209904, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1244323788452639477, tenantId=1146029695717560320, journalId=1244284848500682798, issueId=1244321215637209904, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1318, endPage=1324, ext={EN=ArticleExt(id=1244321222473925624, articleId=1244321222117409754, tenantId=1146029695717560320, journalId=1244284848500682798, language=EN, title=Determination of Sputum Suction Timing in Mechanical Ventilation Based on Transfer Learning and Breath Sounds Recognition, columnId=1244321216404767539, journalTitle=Journal of Medical Biomechanics, columnName=Original Articles, runingTitle=null, highlight=null, articleAbstract=
Objective To propose a transfer learning-based method for breath sound feature recognition and autonomous determination of sputum suction timing.
Methods An electronic stethoscope was used to collect breath sounds from the main airways of clinically ventilated patients before and after sputum suction, with pre-suction breath sounds labeled as requiring suction. The collected data underwent high-pass filtering and wavelet soft-threshold denoising, followed by the extraction of log-Mel spectrograms. A VGGish model pretrained on the Audio Set dataset was then employed to extract feature vectors from these spectrograms, which were subsequently classified using a support vector machine to determine whether suction was required.
Results The precision, recall and F1 score for recognition of breath sounds requiring sputum suction were 86.73%, 93.06% and 89.78%, respectively.
Conclusions The proposed breath sound recognition method based on transfer learning effectively determines the timing of sputum suction and shows a significant clinical potential.
, correspAuthors=Jiangzhen GUO, Chunjing TAO, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Shuai WANG, Jiangzhen GUO, Chunjing TAO), CN=ArticleExt(id=1244321226278158578, articleId=1244321222117409754, tenantId=1146029695717560320, journalId=1244284848500682798, language=CN, title=基于迁移学习与呼吸音特征识别的机械通气吸痰时机判别, columnId=1244321216576734006, journalTitle=医用生物力学, columnName=论著, runingTitle=null, highlight=null, articleAbstract=
目的 提出基于迁移学习的呼吸音特征识别与吸痰时机自主判断方法。
方法 使用电子听诊器采集临床机械通气患者在吸痰前、后的主气道呼吸音,将吸痰前的呼吸音标记为“需要吸痰”类别。对采集数据进行高通滤波和小波软阈值滤波去噪,提取对数梅尔频谱图,并利用在Audio Set数据集上预训练的VGGish模型提取对数梅尔频谱图的特征向量,最后通过支持向量机分类器对特征向量进行分类,判断是否需要吸痰。
结果 对需要吸痰的呼吸音识别的精确率、召回率和F1分数分别为86.73%、93.06%和89.78%。
结论 基于迁移学习的呼吸音识别方法能够有效判断吸痰时机,在临床应用中具有潜在价值。
, correspAuthors=郭江真, 陶春静, authorNote=null, correspAuthorsNote=
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作者贡献声明:
汪帅负责模型搭建与测试,论文撰写与修改;郭江真与陶春静负责资源协调、研究监督、项目统筹与论文审核等工作。
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Time-domain waveforms and spectrograms of breath sounds during the noise removal process (a) Before high-pass filtering, (b) After high-pass filtering, (c) After wavelet soft-threshold filtering, figureFileSmall=fh8/bwXz01TuE2FTH1q0CQ==, figureFileBig=gvyOVvYFLKuBWvMEA0KHAw==, tableContent=null), ArticleFig(id=1244321230359216643, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=CN, label=图1, caption=
呼吸音去噪过程中时域波形图和频谱图, figureFileSmall=fh8/bwXz01TuE2FTH1q0CQ==, figureFileBig=gvyOVvYFLKuBWvMEA0KHAw==, tableContent=null), ArticleFig(id=1244321230648623645, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=EN, label=Tab. 1, caption=
Structure and network layer parameters of VGGish network
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| 网络层类型 | 参数 |
|---|
| 全连接层(输出层) | 特征图:128 |
| 全连接层 | 特征图:4 096 |
| 全连接层 | 特征图:4 096 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:512 卷积核:3×3 |
| 卷积层 | 特征图:512 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:256 卷积核:3×3 |
| 卷积层 | 特征图:256 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:128 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:64 卷积核:3×3 |
| 输入 | 对数梅尔频谱图96×64 |
), ArticleFig(id=1244321230795424298, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=CN, label=表1, caption=
VGGish网络的结构与网络层参数
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| 网络层类型 | 参数 |
|---|
| 全连接层(输出层) | 特征图:128 |
| 全连接层 | 特征图:4 096 |
| 全连接层 | 特征图:4 096 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:512 卷积核:3×3 |
| 卷积层 | 特征图:512 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:256 卷积核:3×3 |
| 卷积层 | 特征图:256 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:128 卷积核:3×3 |
| 最大池化层 | 池化核:2×2 |
| 卷积层 | 特征图:64 卷积核:3×3 |
| 输入 | 对数梅尔频谱图96×64 |
), ArticleFig(id=1244321230900281913, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=EN, label=Tab. 2, caption=
Classification result-evaluation index
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| 评价指标 | 需要吸痰 | 无需吸痰 | 总体准确率/% |
|---|
| 精确率/% | 84.32±9.52 | 95.50±2.66 | 90.96±3.08 |
| 召回率/% | 93.10±3.74 | 90.3±4.91 |
| F1分数 | 88.49±5.51 | 92.83±2.88 |
), ArticleFig(id=1244321231034499651, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=CN, label=表2, caption=
分类结果-评价指标
, figureFileSmall=null, figureFileBig=null, tableContent=
| 评价指标 | 需要吸痰 | 无需吸痰 | 总体准确率/% |
|---|
| 精确率/% | 84.32±9.52 | 95.50±2.66 | 90.96±3.08 |
| 召回率/% | 93.10±3.74 | 90.3±4.91 |
| F1分数 | 88.49±5.51 | 92.83±2.88 |
), ArticleFig(id=1244321231130968652, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=EN, label=Tab. 3, caption=
Classification result-confusion matrix
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| 真实类别 | 预测类别 | 合计 |
|---|
| 需要吸痰 | 无需吸痰 |
|---|
| 需要吸痰 | 268 | 20 | 288 |
| 无需吸痰 | 41 | 380 | 421 |
| 合计 | 309 | 400 | 709 |
), ArticleFig(id=1244321231269380696, tenantId=1146029695717560320, journalId=1244284848500682798, articleId=1244321222117409754, language=CN, label=表3, caption=
分类结果-混淆矩阵
, figureFileSmall=null, figureFileBig=null, tableContent=
| 真实类别 | 预测类别 | 合计 |
|---|
| 需要吸痰 | 无需吸痰 |
|---|
| 需要吸痰 | 268 | 20 | 288 |
| 无需吸痰 | 41 | 380 | 421 |
| 合计 | 309 | 400 | 709 |
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