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  • 1
    ISSN: 1433-0423
    Keywords: Schlüsselwörter Altersabhägige Makulopathie ; Altersbedingte Makuladegeneration ; Xanthophyll ; Autofluoreszenz ; Sauerstoffsättigung ; Imaging Spektrometrie ; Key words Age-related maculopathy ; Age-related macular degeneration ; Xanthophyll ; Autofluorescence ; Oxygen saturation ; Imaging spectrometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: The aim of this study was to evaluate prospectively whether there are differences in spectrometrically measurable parameters of the fundus between patients with early and late age-related maculopathy (ARM), the children of the ARM patients (F1 generation) and normals. Method: Using the “Jenaer Imaging Spectrometer”, retinal oxygen saturation, xanthophyll, and intrinsic fluorescence were measured; the spatial distribution of xanthophyll was determined using the Rodenstock SLO 101 model. Results: Xanthophyll is reduced in late ARM as compared to the F1 generation and the control group (a〈0.01). The different fluorescence spectra, measured at shortwave and at longwave excitation, suggest the presence of more than one fluorophore. Furthermore, the components of the fluorophores seem to be different between patients with ARM and their F1 generation. The longwave autofluorescence is age-dependent only in late ARM (r 2=0.81). For the first time, we found an alteration in oxygen saturation in retinal vessels in patients with ARM. Conclusions: Xanthophyll is reduced only in late ARM. Autofluorescene and oxygen saturation are different between ARM patients, the F1 generation and normals, however, we were not able to identify a genetically based predisposition concerning the parameters studied.
    Notes: Zusammenfassung Hintergrund: Es wurde untersucht, ob zwischen Patienten mit früher und später altersabhängiger Makulopathie (ARM) und deren Kindern (F1-Generation) sowie Normalpersonen objektiv meßbare Unterschiede in spektrometrischen Parametern des Fundus bestehen. Methode: Mit dem Jenaer Imaging-Spektrometer wurden retinale Sauerstoffsättigung, Xanthophyll und natürliche Fluorophore und mit dem Rodenstock SLO-101 die örtliche Verteilung des Xanthophylls gemessen. Ergebnisse: Xanthophyll ist bei der späten ARM gegenüber der F1-Generation und der Kontrollgruppe signifikant reduziert (α〈0.01). Die bei kurz- und langwelliger Anregung gemessenen unterschiedlichen Autofluoreszenzspektren sind ein Hinweis darauf, daß mehr als ein Fluorophor detektierbar ist und daß sich bei ARM-Patienten gegenüber deren F1-Generation die Anteile der Fluorophore ändern. Die langwellige Autofluoreszenz ist nur bei dem Spätstadium der ARM altersabhängig (R2=0.81). Zudem ist die Sauerstoffsättigung in retinalen Gefäßen bei ARM verändert. Schlußfolgerung: Xanthophyll ist nur bei der späten ARM reduziert. Autofluoreszenz und Sauerstoffsättigung unterscheiden sich zwischen Patienten mit ARM und Kindern von ARM-Patienten und Augengesunden, jedoch wurde kein Hinweis auf eine genetische Prädisposition bei Kindern von ARM-Patienten auf der Grundlage dieser Parameter gefunden.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Graefe's archive for clinical and experimental ophthalmology 238 (2000), S. 960-964 
    ISSN: 1435-702X
    Keywords: Keywords Age-related maculopathy ; Retina ; Macula ; Perfusion ; Blood flow
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Background: To investigate retinal capillary blood flow characteristics in patients with age-related maculopathy (ARM). Methods: Retinal capillary blood volume (VOL), blood flow (FLOW), and velocity (VEL) were measured in four macular sectors (I, II, III, IV) and in two areas beyond the temporal superior and inferior major vessel arcades (V and VI) in: 10 eyes with early ARM (drusen ≥63 µm and/or atrophy of the retinal pigment epithelium, RPE, 〈175 µm and/or proliferation of RPE), 13 with late ARM (exudative), 10 with late ARM (fibrotic), 14 normal eyes of 14 children of patients with ARM, and in 4 age- and sex-matched control groups using the Heidelberg retinal flowmeter (HRF). Statistical analysis was performed with the exact Wilcoxon test using an additional adjustment procedure by Bonferroni-Holm. Results: As compared to the control group, there was no significant change of VOL, FLOW, and VEL in patients with early ARM. In patients with late ARM (exudative), there was a significant higher FLOW in sectors I, II, and IV and a higher VOL and VEL in sectors III and IV. The group with late ARM (fibrotic) showed a reduction of VOL and FLOW in sectors I–IV and of VEL in sectors II and IV. In children of ARM patients, VOL, FLOW, and VEL of sectors I–VI did not differ from the control group. Conclusion: HRF measurements in patients with ARM indicate an increased macular retinal capillary blood flow in patients with the exudative form of late ARM and a decreased macular perfusion in those with the fibrotic form.
    Type of Medium: Electronic Resource
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