Lütfiye KANIT, Yusuf Hakan DOĞAN, Melih DAĞDEVİREN

Effects of restraint stress and nitric oxide synthase inhibition on learning and strategy preference in young adult male rats

Amaç: Prospektif, randomize ve çilf kör çalışmada septorinoplasti (SRP) ve endoskopik sinus cerrahisi (ESC) ameliyatlarından sonra levobupivakain ve tramadol infiltrasyonunun postoperatif analjezik etkilerinin araştırılması amaçlandı. Gereç ve Yöntemler: Çalışmaya elektif olarak ESC ve SRP operasyonları gerirecek ASA I-III sınıfı altmış erişkin hasta alındı. Anestezi indüksiyonu intravenöz propofol 2-2.5 mg/kg-1, roküronyum bromid 0.6 mg/kg-1, and fentanil 1 μg/kg-1 ile gerçekleştirildi. İdame %2 sevofluran ile N2O/O2 karışımı (FiO2: 35%) ile sağlandı. Operasyondan 10 dakika önce cerrahi sahaya tramadol 0.5 mg/kg-1(Group T: n= 20), levobupivakain %0.25(Group L: n= 20), ve lidokainin %1(Group C: n= 20) adrenaline solüsyonu 1/200000 infiltre edildi (ESC için 5 mL ve SRP için10 mL). Postoperatif dönemde hastaların tümüne hasta kontrollü analjezi cihazı ile fentanil uygulandı (bolus doz: 15 μg ve kilit aralığı:10 dak). Ağrı postoperative ilk 24 saatte 11 dereceli vizüel analog skala (VAS) ile 4 saat ara ile değerlendirildi. Postoperatif dönemde analjezik gereksinim, opioid tüketimi ve yan etkiler belirlenerek kaydedildi. Bulgular: Tramadol verilen grubun fentanil gereksinim ve tüketimi istatistiksel açıdan farklı bulundu. 24 saatlik fentanyl dozları Grup C, L ve T için sırası ile 345.2 ± 168.8,6 μg, 221.1 ± 120.6 μg; and 184.1 ± 130,3 μg (p= 0.002) olarak belirlendi. Tramadol ve kontrol grubunun fentanil gereksinimlerinde 16, 20 ve 24. saat peryotlarda (p= 0.012, p= 0.004. ve p= 0.002) farklılık saptandı. Yan etki profili benzerdi. Sonuç: Bulgularımız ESC ve SRP operasyonlarından önce preemptif tramadol infiltrasyonunun levobupivakainin etkili, pratik ve güvenli bir alternatifi olduğunu düşündürmektedir. Key Words Authors All Advanced Search Editor Corner Author's CornerICMJE Form for Disclosure of Potential Conflicts of InterestCommittee on Publication Ethics (COPE) Flowchart Reviewer's CornerCommittee on Publication Ethics (COPE) Flowchart

Kısıtlama stresi ve nitrik oksit sentaz inhibisyonunun genç erişkin erkek sıçanlarda öğrenme ve strateji tercihi üzerine etkileri

Objective: The aim of this study was to investigate the effects of restraint stress and nitric oxide synthase (NOS) inhibition by NωNitro-L-Arginine (LNA) on learning and strategy preference. Material and Methods: Rats were randomly divided into four groups (Saline, Saline+Stress, LNA, LNA+Stress). Stress was applied for one hour in glass cylinders during 13 days. One hour after this stress application, water maze experiments were started. Injections (saline 1 ml/kg or 50 mg/kg LNA) were given 10 minutes before each experiment. The platform was kept visible or hidden (on the 4th, 8th, 12th days) at the same position. On the 13th day the platform was located on the opposite quadrant. Results: Saline groups exhibited significantly better performances (F(1.31)=174.038 p

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