Evidence map›Paper›PMID 23408312›Full record

ArticleDocumenta ophthalmologica. Advances in ophthalmology2013

Decreased retinal-choroidal blood flow in retinitis pigmentosa as measured by MRI.

Yi Zhang, Joseph M Harrison, Oscar San Emeterio Nateras, Steven Chalfin, Timothy Q Duong

Open access · greenAbstract readComparative Study
In one paragraph

Article in Documenta ophthalmologica. Advances in ophthalmology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

38 citing papers in PubMed, 1 synthesis or guideline pooled it, 71 citations in OpenAlex.

  1. Pooled it
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  5. Review
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  7. Review
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  10. Relationship between the vessel density around the optic nerve head and visual field deterioration in eyes with retinitis pigmentosa.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2022
    Article
  11. Article
  12. Article
  13. The impact of macular edema on microvascular and metabolic alterations in retinitis pigmentosa.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2021
    Article
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  17. Review
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  19. Metabolic monitoring of transcorneal electrical stimulation in retinitis pigmentosa.Graefe's archive for clinical and experimental ophthalmology = Albrecht von Graefes Archiv fur klinische und experimentelle Ophthalmologie · 2020
    Observational
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors at 1 institution in 1 country.

Yi ZhangResearch Imaging Institute, University of Texas Health Science Center, 8403 Floyd Curl Dr, San Antonio, TX 78229, USA.
Joseph M Harrison
Oscar San Emeterio Nateras
Steven Chalfin
Timothy Q Duong
The University of Texas Health Science Center at San Antonio · US

Funding

Institute for Integration of Medicine & Science: A Partnership to Improve HealthUL1TR000149 · NCATS · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI CLARK, ROBERT A · 2012 to 2013
$6.8M
Layer-Specific Functional &Perfusion Imaging of RetinaR01EY014211 · NEI · UNIV OF MASSACHUSETTS MED SCH WORCESTER · PI DUONG, TIMOTHY Q. · 2004 to 2011
$3.0M
Layer-specific imaging of retinal degenerationR01EY018855 · NEI · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI DUONG, TIMOTHY Q. · 2009 to 2012
$769k
NCATS NIH HHS UL1 TR000149NCATS NIH HHS UL1TR000149NEI NIH HHS EY018855NEI NIH HHS R01 EY014211NEI NIH HHS R01 EY018855
6 · The paper itself

Abstract

purposeTo evaluate retinal and choroidal blood flow (BF) using high-resolution magnetic resonance imaging (MRI) as well as visual function measured by the electroretinogram (ERG) in patients with retinitis pigmentosa (RP).

methodsMRI studies were performed in 6 RP patients (29-67 years) and 5 healthy volunteers (29-64 years) on a 3-Tesla scanner with a custom-made surface coil. Quantitative BF was measured using the pseudo-continuous arterial spin-labeling technique at 0.5 × 0.8 × 6.0 mm. Full-field ERGs of all patients were recorded. Amplitudes and implicit times of standard ERGs were analyzed.

resultsBasal BF in the posterior retinal-choroid was 142 ± 16 ml/100ml/min (or 1.14 ± 0.13 μl/mm(2)/min) in the control group and was 70 ±19 ml/100ml/min (or 0.56 ± 0.15 μl/mm(2)/min) in the RP group. Retinal-choroidal BF was significantly reduced by 52 ± 8 % in RP patients compared to controls (P<0.05). ERG a- and b-wave amplitudes of RP patients were reduced, and b-wave implicit times were delayed. There were statistically significant correlations between a-wave amplitude and BF value (r=0.9, P<0.05) but not between b-wave amplitude and BF value (r =0.7, P=0.2).

conclusionsThis study demonstrates a novel non-invasive MRI approach to measure quantitative retinal and choroidal BF in RP patients. We found that retinal-choroidal BF was markedly reduced and significantly correlated with reduced amplitudes of the a-wave of the standard combined ERG.

Indexed as

ElectroretinographyMagnetic Resonance ImagingAdultAgedChoroidFemaleHumansMaleMiddle AgedRegional Blood FlowRetinaRetinitis Pigmentosa

Identifiers

PMID23408312
PMCPMC3665727
OpenAlexW2139090903

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.