Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients
Abstract Lung to finger circulation time (LFCT) has been used to estimate cardiac function. We developed a new LFCT measurement device using a laser sensor at fingertip. We measured LFCT by measuring time from re-breathing after 20 s of breath hold to the nadir of the difference of transmitted red l...
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Nature Portfolio
2021
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oai:doaj.org-article:2af27f39d9b64858a840e14f26707a8e2021-12-02T16:35:46ZLung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients10.1038/s41598-021-95192-32045-2322https://doaj.org/article/2af27f39d9b64858a840e14f26707a8e2021-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-95192-3https://doaj.org/toc/2045-2322Abstract Lung to finger circulation time (LFCT) has been used to estimate cardiac function. We developed a new LFCT measurement device using a laser sensor at fingertip. We measured LFCT by measuring time from re-breathing after 20 s of breath hold to the nadir of the difference of transmitted red light and infrared light, which corresponds to percutaneous oxygen saturation. Fifty patients with heart failure were enrolled. The intrasubject stability of the measurement was assessed by the intraclass correlation coefficient (ICC). The ICC calculated from 44 cases was 0.85 (95% confidence interval: 0.77–0.91), which means to have “Excellent reliability.” By measuring twice, at least one clear LFCT value was obtained in 89.1% of patients and the overall measurability was 95.7%. We conducted all LFCT measurements safely. High ICCs were obtained even after dividing patients according to age, cardiac index (CI); 0.85 and 0.84 (≥ 75 or < 75 years group, respectively), 0.81 and 0.84 (N = 26, ≥ or < 2.2 L/min/M2). These results show that our new method to measure LFCT is highly stable and feasible for any type of heart failure patients.Tomoyuki TobushiTakatoshi KasaiMasayuki HiroseKazuhiro SakaiManabu AkamatsuChizuru OhsawaYasuko YoshiokaShoko SudaNanako ShiroshitaRyo NakamuraToshiaki KadokamiTakeshi TohyamaKouta FunakoshiKazuya HosokawaShin-ichi AndoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021) |
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Medicine R Science Q Tomoyuki Tobushi Takatoshi Kasai Masayuki Hirose Kazuhiro Sakai Manabu Akamatsu Chizuru Ohsawa Yasuko Yoshioka Shoko Suda Nanako Shiroshita Ryo Nakamura Toshiaki Kadokami Takeshi Tohyama Kouta Funakoshi Kazuya Hosokawa Shin-ichi Ando Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| description |
Abstract Lung to finger circulation time (LFCT) has been used to estimate cardiac function. We developed a new LFCT measurement device using a laser sensor at fingertip. We measured LFCT by measuring time from re-breathing after 20 s of breath hold to the nadir of the difference of transmitted red light and infrared light, which corresponds to percutaneous oxygen saturation. Fifty patients with heart failure were enrolled. The intrasubject stability of the measurement was assessed by the intraclass correlation coefficient (ICC). The ICC calculated from 44 cases was 0.85 (95% confidence interval: 0.77–0.91), which means to have “Excellent reliability.” By measuring twice, at least one clear LFCT value was obtained in 89.1% of patients and the overall measurability was 95.7%. We conducted all LFCT measurements safely. High ICCs were obtained even after dividing patients according to age, cardiac index (CI); 0.85 and 0.84 (≥ 75 or < 75 years group, respectively), 0.81 and 0.84 (N = 26, ≥ or < 2.2 L/min/M2). These results show that our new method to measure LFCT is highly stable and feasible for any type of heart failure patients. |
| format |
article |
| author |
Tomoyuki Tobushi Takatoshi Kasai Masayuki Hirose Kazuhiro Sakai Manabu Akamatsu Chizuru Ohsawa Yasuko Yoshioka Shoko Suda Nanako Shiroshita Ryo Nakamura Toshiaki Kadokami Takeshi Tohyama Kouta Funakoshi Kazuya Hosokawa Shin-ichi Ando |
| author_facet |
Tomoyuki Tobushi Takatoshi Kasai Masayuki Hirose Kazuhiro Sakai Manabu Akamatsu Chizuru Ohsawa Yasuko Yoshioka Shoko Suda Nanako Shiroshita Ryo Nakamura Toshiaki Kadokami Takeshi Tohyama Kouta Funakoshi Kazuya Hosokawa Shin-ichi Ando |
| author_sort |
Tomoyuki Tobushi |
| title |
Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| title_short |
Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| title_full |
Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| title_fullStr |
Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| title_full_unstemmed |
Lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| title_sort |
lung-to-finger circulation time can be measured stably with high reproducibility by simple breath holding method in cardiac patients |
| publisher |
Nature Portfolio |
| publishDate |
2021 |
| url |
https://doaj.org/article/2af27f39d9b64858a840e14f26707a8e |
| work_keys_str_mv |
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