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Yıl:2018; Cilt: 55; Sayı: 2>> Özet
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Nöropsikiyatri Arşivi; 2018;55(2):123-126
Hemodiyalizin Görme Yolları Üzerine Etkisinin Vizüel Uyandırılmış Potansiyeller (VEP) Yardımıyla İncelenmesi
Y Güzey Aras, B Doğan Güngen, S Sipahi, Be Demiryürek
Sakarya Üniversitesi, Sakarya
Amaç: Üremi santral sinir sistemi (SSS) fonksiyonlarını etkileyen metabolik bir bozukluktur. Bu etkilenmeyi göstermek için kullanılan tanı yöntemlerinden biri de görsel uyandırılmış potansiyellerdir (visual evoked potential; VEP). Kronik Böbrek Yetmezliği (KBY) hastalarında VEP ile ilgili veriler sınırlıdır. Bu çalışmada KBY nedeni ile hemodiyaliz uygulanan hastalarda böbrek yetmezliğinin ve diyalizde çekilen sıvı miktarının (UFR) SSS fonksiyonları üzerine etkisinin VEP yardımı ile incelenmesi amaçlanmıştır. Yöntem: Bu çalışmaya KBY nedeni ile hemodiyaliz tedavisi uygulanan 30 hasta ve yaş, cinsiyet bakımından benzer özelliklere sahip 28 sağlıklı kontrol alındı. Mental retardasyon, diabetes mellitus, demyelinizan hastalık, inme, nörotoksik ilaç kullanımı, oftalmolojik hastalıklar çalışma dışında bırakıldı. VEP parametrelerinden N75 (N1), P100 (P1) ve N135 (N2) latansları ile P100 dalgasının amplitüdü kayıtlandı. Hemodiyalizden hemen önce ve 24 saat sonra olmak üzere 2 kez VEP çekimi yapıldı ve VEP parametreleri karşılaştırıldı. Ayrıca, diyalizde çekilen sıvı miktarının VEP parametreleri üzerine etkisi araştırıldı. Bulgular: Hemodiyalize giren hastalar ile kontrol grubu arasında yaş ve cinsiyet açısından farklılık yoktu (ortalama 49,56±12,52 ve 48,53±13,28 yıl). Ortalama hemodiyaliz süresi 87,53±56,34 ay idi. KBY’li hastaların her iki göz P1 latansları kontrol grubuna göre uzamış olarak saptandı (sağ göz p=0,002, sol göz p=0,019). Tek bir hemodiyaliz seansında ilk ölçüme göre P1 latansında önemli bir azalma gözlendi (p
Effects of Hemodialysis on Visual Pathways Assessed by Visual Evoked Potentials (VEPs)
Introduction: Uremia is a metabolic disorder that affects the functions of the central nervous system (CNS). Visual evoked potentials (VEPs) can be used to demonstrate uremia-induced effects on the CNS. Data on VEPs of patients with chronic renal failure (CRF) are limited. The purpose of this study was to examine the effects of renal failure and the ultrafiltration rate (UFR) on CNS functions in patients undergoing hemodialysis (HD) using VEPs. Methods: The study consisted of 30 CRF patients undergoing HD, and a control group of 28 individuals, matched in terms of age and gender. Patients with mental retardation, diabetes mellitus, demyelinating disease, stroke, use of neurotoxic drugs, and ophthalmologic diseases were excluded from the study. The pattern VEP (PVEP) parameters recorded were latencies to N75 (N1), P100 (P1) and N135 (N2) waves, and the peak-to-peak amplitude of a P100 wave. The PVEP was taken twice just before and 24 h after HD, and the PVEP parameters were compared. Additionally, the effect of the UFR on the PVEP parameters was examined. Results: There was no difference between the HD group and control group in terms of gender and age (mean ages of 49.56±12.52 and 48.53±13.28 years, respectively). The average HD period was 87.53±56.34 months. The P1 latencies between the two eyes the patients with CRF were prolonged when compared to those of the controls (right eye p=0.002; left eye p=0.019). A single HD session significantly shortened the latency of the P1 waves compared to that of the baseline waves (p

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