{"title":"用耳体积脉搏图测量脉搏波传递时间的变化是一个有用的替代手指体积脉搏图。","authors":"Ryota Nakano, Midoriko Higashi, Kazuhiro Shirozu, Shoko Ozasa, Makoto Sumie, Tetsuhiro Fujiyoshi, Ken Yamaura","doi":"10.1007/s10877-025-01327-6","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>Plethysmography using the finger is affected by various clinical conditions, including sympathetic tone. This study aimed to evaluate whether pulse wave transit time (PWTT) calculated using ear plethysmography could be used as a substitute for finger PWTT.</p><p><strong>Methods: </strong>In this prospective observational study, 50 patients underwent elective hepatectomy between December 2021 and April 2022. PWTT was simultaneously measured using finger and ear plethysmography. The primary outcome was the global agreement of all PWTT measurements. The secondary outcome was trending ability during hemodynamic changes.</p><p><strong>Results: </strong>In total, 311 paired readings from 50 patients were collected. PWTT-ear was shorter than PWTT (68.1 ± 15.1 ms). For the percent change in PWTT from baseline (%ΔPWTT), linear regression analyses showed a strong correlation between %ΔPWTT-ear and %ΔPWTT (r = 0.85, P < 0.001). In Bland-Altman analyses, the bias between %ΔPWTT-ear and %ΔPWTT was - 0.04% and limits of agreement from - 0.17 to 0.17%, with a percentage error (2 standard deviation/mean %ΔPWTT) of 4.2%. The conductance rate of the two methods was 95.9% based on a four-quadrant plot analysis. The angular conductance rate was 98.9% with a radial limit of ± 25.3 based on a polar plot analysis.</p><p><strong>Conclusion: </strong>PWTT-ear was shorter than PWTT, but the % change in PWTT-ear was similar to that in PWTT. PWTT measured using ear plethysmography can be used as a substitute for measuring changes in PWTT.</p><p><strong>Trial registration: </strong>This study was registered in the UMIN-CTR Clinical Database (ID: UMIN000045950), https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000052326 on December 08, 2021.</p>","PeriodicalId":15513,"journal":{"name":"Journal of Clinical Monitoring and Computing","volume":" ","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Change in pulse wave transit time measured using ear plethysmography is a useful substitute for finger plethysmography.\",\"authors\":\"Ryota Nakano, Midoriko Higashi, Kazuhiro Shirozu, Shoko Ozasa, Makoto Sumie, Tetsuhiro Fujiyoshi, Ken Yamaura\",\"doi\":\"10.1007/s10877-025-01327-6\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>Plethysmography using the finger is affected by various clinical conditions, including sympathetic tone. This study aimed to evaluate whether pulse wave transit time (PWTT) calculated using ear plethysmography could be used as a substitute for finger PWTT.</p><p><strong>Methods: </strong>In this prospective observational study, 50 patients underwent elective hepatectomy between December 2021 and April 2022. PWTT was simultaneously measured using finger and ear plethysmography. The primary outcome was the global agreement of all PWTT measurements. The secondary outcome was trending ability during hemodynamic changes.</p><p><strong>Results: </strong>In total, 311 paired readings from 50 patients were collected. PWTT-ear was shorter than PWTT (68.1 ± 15.1 ms). For the percent change in PWTT from baseline (%ΔPWTT), linear regression analyses showed a strong correlation between %ΔPWTT-ear and %ΔPWTT (r = 0.85, P < 0.001). In Bland-Altman analyses, the bias between %ΔPWTT-ear and %ΔPWTT was - 0.04% and limits of agreement from - 0.17 to 0.17%, with a percentage error (2 standard deviation/mean %ΔPWTT) of 4.2%. The conductance rate of the two methods was 95.9% based on a four-quadrant plot analysis. The angular conductance rate was 98.9% with a radial limit of ± 25.3 based on a polar plot analysis.</p><p><strong>Conclusion: </strong>PWTT-ear was shorter than PWTT, but the % change in PWTT-ear was similar to that in PWTT. PWTT measured using ear plethysmography can be used as a substitute for measuring changes in PWTT.</p><p><strong>Trial registration: </strong>This study was registered in the UMIN-CTR Clinical Database (ID: UMIN000045950), https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000052326 on December 08, 2021.</p>\",\"PeriodicalId\":15513,\"journal\":{\"name\":\"Journal of Clinical Monitoring and Computing\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":2.2000,\"publicationDate\":\"2025-07-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Clinical Monitoring and Computing\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1007/s10877-025-01327-6\",\"RegionNum\":3,\"RegionCategory\":\"医学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ANESTHESIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Clinical Monitoring and Computing","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s10877-025-01327-6","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ANESTHESIOLOGY","Score":null,"Total":0}
Change in pulse wave transit time measured using ear plethysmography is a useful substitute for finger plethysmography.
Purpose: Plethysmography using the finger is affected by various clinical conditions, including sympathetic tone. This study aimed to evaluate whether pulse wave transit time (PWTT) calculated using ear plethysmography could be used as a substitute for finger PWTT.
Methods: In this prospective observational study, 50 patients underwent elective hepatectomy between December 2021 and April 2022. PWTT was simultaneously measured using finger and ear plethysmography. The primary outcome was the global agreement of all PWTT measurements. The secondary outcome was trending ability during hemodynamic changes.
Results: In total, 311 paired readings from 50 patients were collected. PWTT-ear was shorter than PWTT (68.1 ± 15.1 ms). For the percent change in PWTT from baseline (%ΔPWTT), linear regression analyses showed a strong correlation between %ΔPWTT-ear and %ΔPWTT (r = 0.85, P < 0.001). In Bland-Altman analyses, the bias between %ΔPWTT-ear and %ΔPWTT was - 0.04% and limits of agreement from - 0.17 to 0.17%, with a percentage error (2 standard deviation/mean %ΔPWTT) of 4.2%. The conductance rate of the two methods was 95.9% based on a four-quadrant plot analysis. The angular conductance rate was 98.9% with a radial limit of ± 25.3 based on a polar plot analysis.
Conclusion: PWTT-ear was shorter than PWTT, but the % change in PWTT-ear was similar to that in PWTT. PWTT measured using ear plethysmography can be used as a substitute for measuring changes in PWTT.
Trial registration: This study was registered in the UMIN-CTR Clinical Database (ID: UMIN000045950), https://center6.umin.ac.jp/cgi-open-bin/icdr_e/ctr_view.cgi?recptno=R000052326 on December 08, 2021.
期刊介绍：
The Journal of Clinical Monitoring and Computing is a clinical journal publishing papers related to technology in the fields of anaesthesia, intensive care medicine, emergency medicine, and peri-operative medicine.
The journal has links with numerous specialist societies, including editorial board representatives from the European Society for Computing and Technology in Anaesthesia and Intensive Care (ESCTAIC), the Society for Technology in Anesthesia (STA), the Society for Complex Acute Illness (SCAI) and the NAVAt (NAVigating towards your Anaestheisa Targets) group.
The journal publishes original papers, narrative and systematic reviews, technological notes, letters to the editor, editorial or commentary papers, and policy statements or guidelines from national or international societies. The journal encourages debate on published papers and technology, including letters commenting on previous publications or technological concerns. The journal occasionally publishes special issues with technological or clinical themes, or reports and abstracts from scientificmeetings. Special issues proposals should be sent to the Editor-in-Chief. Specific details of types of papers, and the clinical and technological content of papers considered within scope can be found in instructions for authors.
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