Porównanie wyników badań elektrofizjologicznych u wcześniaków i dzieci urodzonych o czasie
Comparision Between Electrophysiological Examinations Results in Pre-term and In-term Born Children
Małgorzata Werenowska-Pietrzyk, Anna Piwowarczyk, Joanna Kobylarz, Anna Klonowska, Anna Kubatko-Zielińska, Bożena Romanowska-Dixon
Katedra i Klinika Okulistyki Collegium Medicum Uniwersytetu Jagiellońskiego w Krakowie Kierownik: dr hab. n. med. Bożena Romanowska-Dixon
Summary: Purpose of this
study was to compare the results of pVEP and pERG
examinations between pre-term and in-term born ten years
Material and methods: We examined 45 pre-term born and 21 in-term born children. In 14 cases of pre-term born children cryotherapy was performed following retinopathy of prematurity (ROP), remaining group of 27 children had not presented clinical features of ROP or in whom spontaneous regression had occur. All participants underwent ophthalmic examination and were tested with pVEP and pERG.
Results: The mean amplitude of P100 for 1o pattern was: in the group of in-term born children 22.5 µV, in pre-term born children without cryocoagulation – 20.0 µV, and after cryocoagulation – 19.0 µV. The mean implicit time of P100 was: 99 ms, 101.37 ms i 102 ms. For 0.3 pattern the mean amplitude of P100 was: 21.6; 17.7 and 14.4 µV, and implicit time – 103.9; 105.2 and 110.1 ms. There was no difference in amplitude and implicit time of P50 and in implicit time of N95 pERG between 3 groups. The amplitude of N95 was the biggest in in-term born children, and the smallest in pre-term born children after cryocoagulation.
Conclusions: In the group of pre-term infants especially those treated with cryotherapy the authors revealed a significant reduction of the P100 amplitude, prolonged latency, and reduction of N95 amplitude in comparison with in-term born children.
Keywords: VEP, ERG, retinopathy of prematurity.