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NEFROTİK SENDROMLU HASTALARDA FUROSEMİDİN ALBUMİN İLE İNVİTRO İNKÜBASYONU NATRİÜRETİK VE DİÜRETİK ETKİSİNE KATKIDA BULUNUR MU?

DOES IN VIVO INCUBATION OF FUROSEMİDE WITH ALBUMIN INCREASE ITS NATRIURETIC AND DIURETIC EFFECTS IN PATIENTS WITH NEPHROTIC SYNDROME ?

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Abstract (2. Language): 
It has been claimed that the diuretic action of furosemide (F) is decreased in patients with nephrotic syndrome (NS), because less F reaches renal tubules in hypoalbuminemia since F is bound tightly to albumin (A). It has been showed that F acts only after being bound to A in analbuminemic rats. It is advised to combine F with A in order to increase the diuretic effect, although there is not any controlled study in man. We investigated the diuretic effect of furosemide-albumin (FA) complex incubated just before infusion and compared with the effect ofF alone, in the same patients. We selected 10 edematous patients with NS whose serum albumin is between 1,0 - 3,0g/dl (mean 1,8 ± 1,0g/dl) and serum creatinine less than 2 mg/dl (mean 0.7 ±0.1 mg/dl). They were maintained on bed rest and 40 mmol sodium diet, while all medications were stopped. The study consisted of 3 stages: Stage 1: 60 mg F in 50 ml of saline was infused in 15 minutes; Stage 2: 60 mg Fincubated with 50 ml of 20% human albumin 10 minutes before infusion, then infused in 15 minutes; Stage 3: 60 mg F in 50 ml of saline was infused in 15minutes (same as stage 1). Between F and FA infusions, 1 to 3 days were left for stabilization of body weight. Urine volume (V) and natriuresis (UNa) during 6 hours after infusions were compared. The results are shown in the table. Kontrol F FA UNa (nunol/st) 1.1*0.3 17.7*2.4 20.7+3.5 * V (ml/st) 39+5 196+21 204+28* *ns Furosemide alone proved to have strongly diuretic and natriuretic effect. Previous incubation with albumin did not significantly increase the natriuretic effect of furosemide in patients with nephrotic edema.
Abstract (Original Language): 
Furosemid (F) plazma albuminine yüksek oranda bağlanarak taşındığından, hipoalbuminemide renal tübüllere daha az diüretik ulaştığı ve nefrotik sendromda furosemidin diüretik etkisinin azaldığı ileri sürülmektedir. lnoue, analbuminemik sıçanlarda albumin ve furosemidin tek başlarına natriüretik etkisinin olmadığını, furosemidin albumin ile inkübasyonu ile oluşan kompleksin infüzyonu ile natriürezde belirgin artış olduğunu göstermiştir. İnsanlarda kontrollü çalışma olmamasına rağmen, diüretik etkiyi artırmak için furosemidin albumin ile kombine edilmesi tavsiye edilmektedir. Nefrotik sendromlu, hipoalbuminemik ödemli hastalarda, infüzyon öncesi inkube edilen furosemid ile albuminin natriüretik etkisini tek başına furosemid ile karşılaştırmak amacıyla bu klinik çalışma yapıldı. Çalışmaya, serum albumin düzeyi 1.0-3.0g/dlarasında (ort. 1.8±1.0), serum kreatinin<2.0 mg/dl (ort. 0.7±0.1) olan, ödemli 10 nefrotik sendromlu hasta alındı. Çalışma 3 evreden oluştu. I. evre: 60 mgF, 50 mi şalin içinde 15 dakikada infüze edildi, 2. evre: 60 mg F, 50 mi %20 'lik albumin solüsyonu içine karıştırılarak 10 dakika süreyle oda sıcaklığında inkübe edildi (FA); hemen sonra 15 dakikada infüze edildi, 3. evre: 60 mg F, 50 mi şalin içinde 15 dakikada infüze edildi (1. evrenin aynısı). Her evre öncesi vücut ağırlıkları arasında 0.5 kg dan fazla fark olmaması için evreler arası 1-3 gün süre bırakıldı. İnfüzy onlar dan sonraki 6saatlik dönem natriürez (UNa) ve idrar miktarı (V) açısından değerlendirildi. Sonuçlar tabloda gösterilmiştir. Kontrol F FA UNa (mmol/st) l.l±0.3 17.7±2.4 20.7+3.5 * V (ml/st) 39+5 196*21 204+28 * *ns Furosemid tek başına güçlü diüretik ve natriüretik etki göstermiştir; albumin ile inkübe edilmesi furosemidin yaptığı diüretik ve natriüretik etkiye anlamlı katkıda bulunmamıştır.
FULL TEXT (PDF): 
157-161

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