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The high risk of contrast induced nephropathy in patients with suspected pulmonary embolism despite three different prophylaxis: A randomized controlled trial

Suleyman Turedi, Erkan Erdem, Yunus Karaca, Ozgur Tatli, Aynur Sahin, Suha Turkmen, Abdulkadir Gunduz
Academic Emergency Medicine: Official Journal of the Society for Academic Emergency Medicine 2016 July 14
27411777

STUDY OBJECTIVE: To compare the protective effects of N-acetylcysteine (NAC) plus normal saline (NS), sodium bicarbonate (NaHCO3) plus NS and NS alone in the prevention of contrast-induced nephropathy (CIN) after computed tomography pulmonary angiography (CTPA) in emergency patients.

MATERIALS AND METHODS: This study was planned as a randomized, controlled clinical research. Patients undergoing contrast-enhanced CTPA on suspicion of pulmonary embolism (PE) in the emergency department and with at least one risk factor for development of CIN were included in one of three different prophylaxis groups. The groups received 3 ml/kg IV NAC+NS or NaHCO3+NS solution or NS alone 1 h before CTPA and 1 ml/kg IV per hour for a minimum of 6 h after CTPA. CIN was evaluated as the primary outcome and moderate or severe renal insufficiency, and in-hospital mortality as secondary outcomes.

RESULTS: A total of 257 patients were enrolled in the study. The total level of CIN development was 23.7% (61/257), the level of moderate and severe renal failure was 12.5% (32/257) and the in-hospital mortality rate was 12.8% (33/257). Rates of CIN development in the drug groups were 23.5% in the NAC group (20/85), 21.2% (18/85) in the NaHCO3 group and 26.4% in the NS group (23/87). Rates of development of moderate or severe renal insufficiency were 9.4% in the NAC group (8/85), 10.6% in the NaHCO3 group (9/85) and 17.2% in the NS group (15/87). In-hospital mortality rates were 12.9% in the NAC group (11/85), 11.8% in the NaHCO3 group (10/85) and 13.8% in the NS group (12/87). No difference was determined between the drug groups in terms of CIN, moderate or severe renal injury or hospital mortality.

CONCLUSION: Our results indicate that there is a high risk of CIN in patients with suspected PE despite three different types of prophylaxis being administered, and no statistically differences were observed among prophylactic NAC, NaHCO3 and NS in prevention of CIN following contrast-enhanced CTPA. This article is protected by copyright. All rights reserved.

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