Cargando…
Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres
PURPOSE: To determine whether the blood flow in the superior retina is significantly different from that in the inferior retina, and to determine whether the posture affects the blood flow in the superior and inferior retina. METHODS: The blood flow in the vessels around the optic nerve head was mea...
Autores principales: | , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7405729/ https://www.ncbi.nlm.nih.gov/pubmed/32421146 http://dx.doi.org/10.1167/iovs.61.5.27 |
_version_ | 1783567306192846848 |
---|---|
author | Tomita, Ryo Iwase, Takeshi Ueno, Yoshitaka Goto, Kensuke Yamamoto, Kentaro Ra, Eimei Terasaki, Hiroko |
author_facet | Tomita, Ryo Iwase, Takeshi Ueno, Yoshitaka Goto, Kensuke Yamamoto, Kentaro Ra, Eimei Terasaki, Hiroko |
author_sort | Tomita, Ryo |
collection | PubMed |
description | PURPOSE: To determine whether the blood flow in the superior retina is significantly different from that in the inferior retina, and to determine whether the posture affects the blood flow in the superior and inferior retina. METHODS: The blood flow in the vessels around the optic nerve head was measured by laser speckle flowgraphy in the sitting position in 68 healthy subjects. The blood flow in the superior peripapillary retina was compared with that in the inferior peripapillary retina. The measurements of the blood flow were performed in the sitting position, and the effect of switching to a supine position was determined at 2, 4, 6, 8, 10, and 30 minutes after the switch. RESULTS: The total relative flow volume (RFV)-all, RFV-artery, and RFV-vein were significantly greater in the superior retina than in the inferior retina (all P < 0.001). The mean diameter-all and mean diameter-artery in the superior retina were significantly larger than that in the inferior retina (all P < 0.05). The mean blur rate (MBR)-all, MBR-artery, and MBR-vein in the superior retina were also greater than that in the inferior retina (P < 0.001, P < 0.01, and P < 0.001, respectively). Although the ocular perfusion pressure was significantly changed with the postural alteration, the total RFV-all remained greater in the superior retina than in the inferior retina after the postural change. CONCLUSIONS: Clinicians need to be aware of the differences in the blood flow between the superior and inferior retinal peripapillary area when considering the mechanisms of retinochoroidal diseases. |
format | Online Article Text |
id | pubmed-7405729 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-74057292020-08-19 Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres Tomita, Ryo Iwase, Takeshi Ueno, Yoshitaka Goto, Kensuke Yamamoto, Kentaro Ra, Eimei Terasaki, Hiroko Invest Ophthalmol Vis Sci Retina PURPOSE: To determine whether the blood flow in the superior retina is significantly different from that in the inferior retina, and to determine whether the posture affects the blood flow in the superior and inferior retina. METHODS: The blood flow in the vessels around the optic nerve head was measured by laser speckle flowgraphy in the sitting position in 68 healthy subjects. The blood flow in the superior peripapillary retina was compared with that in the inferior peripapillary retina. The measurements of the blood flow were performed in the sitting position, and the effect of switching to a supine position was determined at 2, 4, 6, 8, 10, and 30 minutes after the switch. RESULTS: The total relative flow volume (RFV)-all, RFV-artery, and RFV-vein were significantly greater in the superior retina than in the inferior retina (all P < 0.001). The mean diameter-all and mean diameter-artery in the superior retina were significantly larger than that in the inferior retina (all P < 0.05). The mean blur rate (MBR)-all, MBR-artery, and MBR-vein in the superior retina were also greater than that in the inferior retina (P < 0.001, P < 0.01, and P < 0.001, respectively). Although the ocular perfusion pressure was significantly changed with the postural alteration, the total RFV-all remained greater in the superior retina than in the inferior retina after the postural change. CONCLUSIONS: Clinicians need to be aware of the differences in the blood flow between the superior and inferior retinal peripapillary area when considering the mechanisms of retinochoroidal diseases. The Association for Research in Vision and Ophthalmology 2020-05-18 /pmc/articles/PMC7405729/ /pubmed/32421146 http://dx.doi.org/10.1167/iovs.61.5.27 Text en Copyright 2020 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
spellingShingle | Retina Tomita, Ryo Iwase, Takeshi Ueno, Yoshitaka Goto, Kensuke Yamamoto, Kentaro Ra, Eimei Terasaki, Hiroko Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title | Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title_full | Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title_fullStr | Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title_full_unstemmed | Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title_short | Differences in Blood Flow Between Superior and Inferior Retinal Hemispheres |
title_sort | differences in blood flow between superior and inferior retinal hemispheres |
topic | Retina |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7405729/ https://www.ncbi.nlm.nih.gov/pubmed/32421146 http://dx.doi.org/10.1167/iovs.61.5.27 |
work_keys_str_mv | AT tomitaryo differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT iwasetakeshi differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT uenoyoshitaka differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT gotokensuke differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT yamamotokentaro differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT raeimei differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres AT terasakihiroko differencesinbloodflowbetweensuperiorandinferiorretinalhemispheres |