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NR 7-9/2006
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Zastosowanie metody
kolorowej ultrasonografii dopplerowskiej w ocenie przepływu krwi
w naczyniach gałki ocznej u pacjentów z przednią niedokrwienną
neuropatią nerwu wzrokowego – doniesienie wstępne
Application of Color Doppler
ultrasonography in the evaluation of the blood flow in the
ocular vessels in patients with anterior ischemic optic
neuropathy – the preliminary report
Iwona Obuchowska1, Andrzej
Ustymowicz2, Zofia Mariak1
1 Z Kliniki Okulistyki Akademii Medycznej w
Białymstoku
Kierownik: prof. dr hab. n. med. Zofia Mariak
2 Z Zakładu Radiologii Akademii Medycznej w
Białymstoku
Kierownik: prof. dr hab. n. med. Jerzy Walecki |
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| Summary: |
Purpose: Anterior
ischemic optic neuropathy (AION) is one of the most
common causes of acute loss vision in the middle-aged
and elderly persons. It occurs due to hypoperfusion in
the short posterior ciliary arteries supplying the optic
nerve head.
The aim of our study was evaluation of the usefulness of
colour Doppler ultrasonography in diagnostics of AION.
Material and methods: Color Doppler imaging of
the ophthalmic artery, central retinal artery and
posterior ciliary arteries were performed in 10 patients
with clinically evident AION. The peak-systolic velocity
(PSV), end-systolic velocity (EDV) and resistance index
(RI) were measured.
Results: No significant differences in the mean
values of PSV, EDV and RI of ophthalmic arteries and
posterior ciliary arteries between the affected and
non-affected eyes were found. Reduction of mean flow
velocities as well as significantly increased resistance
index were observed in the central retinal artery in
eyes with AION.
Conclusions: The Color Doppler findings in the
ciliary arteries do not reflect the ischemic changes in
patients with AION. It is probably due to anatomical
limitation of this method in evaluation of the blood
flow in posterior ciliary arteries supplying the optic
nerve head. Abnormal blood flow parameters in the
central retinal artery are secondary changes due to
optic disc oedema. |
| Słowa kluczowe: |
przednia niedokrwienna
neuropatia nerwu wzrokowego, kolorowa ultrasonografia
dopplerowska. |
| Key words: |
anterior ischemic optic
neuropathy, Color Doppler ultrasonography. |
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