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  • Title: A new protocol using sodium bicarbonate for the prevention of contrast-induced nephropathy in patients undergoing coronary angiography.
    Author: Motohiro M, Kamihata H, Tsujimoto S, Seno T, Manabe K, Isono T, Sutani Y, Yuasa F, Iwasaka T.
    Journal: Am J Cardiol; 2011 Jun 01; 107(11):1604-8. PubMed ID: 21420053.
    Abstract:
    Contrast-induced nephropathy (CIN) is associated with increased morbidity and mortality rates. Although a previous study reported that pretreatment with sodium bicarbonate is more effective than sodium chloride for prophylaxis of CIN, this has not been a universal finding. We performed a prospective randomized trial to investigate whether CIN can be avoided using sodium bicarbonate. In total 155 patients with a glomerular filtration rate (GFR) <60 ml/min/1.73 m(2) who were undergoing coronary angiography were enrolled. We assigned patients to sodium chloride plus sodium bicarbonate (bicarbonate group, n = 78) or sodium chloride alone (chloride group, n = 77). Infusion of sodium bicarbonate at 1 ml/kg/hour continued from 3 hours before to 6 hours after coronary angiography. CIN was defined as a 25% increase in serum creatinine from baseline value or an absolute increase of ≥0.5 mg/dl, which appeared within 2 days of contrast. Baseline GFR was not significantly different between the 2 groups. Patients in the bicarbonate group had a higher GFR than those in the chloride group on day 2 (45.8 ± 13.4 vs 40.9 ± 14.6 ml/min/1.73 m(2), p = 0.031) and at 1 month (49.5 ± 14.7 vs 43.7 ± 15.5 ml/min/1.73 m(2), p = 0.019). CIN occurred in 10 patients (13%) in the chloride group but in only 2 patients (2.6%) in the bicarbonate group (p = 0.012). Sodium chloride plus sodium bicarbonate is more effective than sodium chloride alone for prophylaxis of CIN and can lead to retention of better long-term renal function.
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