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Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy
Measuring the ocular blood flow in neonates may clarify the relationships between eye diseases and ocular circulation abnormalities. However, no method for noninvasively measuring ocular circulation in neonates is established. We used laser speckle flowgraphy (LSFG) modified for neonates to measure...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi Publishing Corporation
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4628741/ https://www.ncbi.nlm.nih.gov/pubmed/26557689 http://dx.doi.org/10.1155/2015/693056 |
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author | Matsumoto, Tadashi Itokawa, Takashi Shiba, Tomoaki Katayama, Yuji Arimura, Tetsushi Mizukaki, Norio Yoda, Hitoshi Hori, Yuichi |
author_facet | Matsumoto, Tadashi Itokawa, Takashi Shiba, Tomoaki Katayama, Yuji Arimura, Tetsushi Mizukaki, Norio Yoda, Hitoshi Hori, Yuichi |
author_sort | Matsumoto, Tadashi |
collection | PubMed |
description | Measuring the ocular blood flow in neonates may clarify the relationships between eye diseases and ocular circulation abnormalities. However, no method for noninvasively measuring ocular circulation in neonates is established. We used laser speckle flowgraphy (LSFG) modified for neonates to measure their ocular circulation and investigated whether this method is reproducible. During their normal sleep, we studied 16 subjects (adjusted age of 34–48 weeks) whose blood flow could be measured three consecutive times. While the subjects slept in the supine position, three mean blur rate (MBR) values of the optic nerve head (ONH) were obtained: the MBR-A (mean of all values), MBR-V (vessel mean), and MBR-T (tissue mean), and nine blood flow pulse waveform parameters in the ONH were examined. We analyzed the coefficient of variation (COV) and the intraclass correlation coefficient (ICC) for each parameter. The COVs of the MBR values were all ≤10%. The ICCs of the MBR values were all >0.8. Good COVs were observed for the blowout score, blowout time, rising rate, falling rate, and acceleration time index. Although the measurement of ocular circulation in the neonates was difficult, our results exhibited reproducibility, suggesting that this method could be used in clinical research. |
format | Online Article Text |
id | pubmed-4628741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-46287412015-11-09 Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy Matsumoto, Tadashi Itokawa, Takashi Shiba, Tomoaki Katayama, Yuji Arimura, Tetsushi Mizukaki, Norio Yoda, Hitoshi Hori, Yuichi Biomed Res Int Research Article Measuring the ocular blood flow in neonates may clarify the relationships between eye diseases and ocular circulation abnormalities. However, no method for noninvasively measuring ocular circulation in neonates is established. We used laser speckle flowgraphy (LSFG) modified for neonates to measure their ocular circulation and investigated whether this method is reproducible. During their normal sleep, we studied 16 subjects (adjusted age of 34–48 weeks) whose blood flow could be measured three consecutive times. While the subjects slept in the supine position, three mean blur rate (MBR) values of the optic nerve head (ONH) were obtained: the MBR-A (mean of all values), MBR-V (vessel mean), and MBR-T (tissue mean), and nine blood flow pulse waveform parameters in the ONH were examined. We analyzed the coefficient of variation (COV) and the intraclass correlation coefficient (ICC) for each parameter. The COVs of the MBR values were all ≤10%. The ICCs of the MBR values were all >0.8. Good COVs were observed for the blowout score, blowout time, rising rate, falling rate, and acceleration time index. Although the measurement of ocular circulation in the neonates was difficult, our results exhibited reproducibility, suggesting that this method could be used in clinical research. Hindawi Publishing Corporation 2015 2015-10-18 /pmc/articles/PMC4628741/ /pubmed/26557689 http://dx.doi.org/10.1155/2015/693056 Text en Copyright © 2015 Tadashi Matsumoto et al. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Matsumoto, Tadashi Itokawa, Takashi Shiba, Tomoaki Katayama, Yuji Arimura, Tetsushi Mizukaki, Norio Yoda, Hitoshi Hori, Yuichi Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title | Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title_full | Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title_fullStr | Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title_full_unstemmed | Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title_short | Reproducibility of Neonate Ocular Circulation Measurements Using Laser Speckle Flowgraphy |
title_sort | reproducibility of neonate ocular circulation measurements using laser speckle flowgraphy |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4628741/ https://www.ncbi.nlm.nih.gov/pubmed/26557689 http://dx.doi.org/10.1155/2015/693056 |
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