NR 2/2002
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Porównawcza analiza zmian morfologicznych
tarczy nerwu wzrokowego po trabekulektomii, przeprowadzona metodą skaningowej tomografii
laserowej
The comparative analysis of changes in optic disc
morphology after trabeculectomy, measured by scanning laser tomography
Patrycja Krzyżanowska, Agnieszka Jamrozy-Witkowska, Magdalena
Koziorowska
Z Katedry i Kliniki Okulistyki Akademii Medycznej we Wrocławiu
Kierownik: prof. dr hab. n. med. Maria Hanna Niżankowska |
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| Summary: |
Purpose: The aim of this study was to
investigate and estimate quantitative changes in optic nerve morphology after glaucoma
surgery using the Heidelberg Retina Tomograph (Heidelberg Engineering, HRT Software 2.01).
Material and Methods: The eyes of 42 consecutive patients (34 women and 8
men) undergoing trabeculectomy at the Department of Ophthalmology, Wroclaw Medical
University, were enrolled into the study. Quantitative analysis of the optic nerve head
parameters by scanning laser tomography were performed, as well as automated perimetry,
before and after surgery. Post operative HRT images were obtained at 2-3 weeks, 4-6
months, 9-12 months and >12 months after surgery.
Results: Forty one patients (97,6%) have obtained postoperatively IOP
reduction greater than 30%. Two weeks after trabeculectomy seven HRT parameters showed
statistically significant improvement: CA, CV, RA, RV, mean cup depth, CSM. Approximately
5 months after surgery only 2 parameters (mean cup depth & CSM) were statistically
changed, as well as 12 months after surgery (mean and max cup depth), which cannot be
explained by postoperative disc edema. A corresponding change was also noted in the visual
field. There was no statistically significant association between optic disc morphology as
measured by HRT and the degree of intraocular pressure reduction.
Conclusion: All patients showing a 30% lowering of IOP after glaucoma
surgery show improved optic nerve morphology as measured by the HRT. Further studies are
required to provide information, to what extent the change in optic disc topography is
dependent on the duration of elevated intraocular pressure or advanced stage of
glaucomatous optic neuropathy. |
| Słowa kluczowe: |
jaskra, tarcza nerwu wzrokowego, trabekulektomia, skaningowa
tomografia laserowa. |
| Key words: |
primary open-angle glaucoma, trabeculectomy, scanning laser
tomography. |
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