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Bun/creatinine ratio-based hydration for preventing stroke-in-evolution after acute ischemic stroke

  • Leng-Chieh Lin
    Affiliations
    Department of Emergency Medicine, Chang Gung Memorial Hospital, Chiayi, Chang Gung University College of Medicine, Taiwan, ROC

    Department of Nursing, Chang Gung University Of Science and Technology, Chiayi Campus, Chiayi, Taiwan, ROC
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  • Jiann-Der Lee
    Affiliations
    Department of Neurology, Chang Gung Memorial Hospital, Chiayi, Chang Gung University College of Medicine, Taiwan, ROC
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  • Yen-Chu Hung
    Affiliations
    Department of Neurology, Chang Gung Memorial Hospital, Chiayi, Chang Gung University College of Medicine, Taiwan, ROC

    Clinical Proteomics Center, Chang Gung Memorial Hospital, Taipei, Taiwan, ROC
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  • Chia-Hao Chang
    Affiliations
    Department of Nursing, Chang Gung University Of Science and Technology, Chiayi Campus, Chiayi, Taiwan, ROC
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  • Jen-Tsung Yang
    Correspondence
    Corresponding author at: Division of Neurosurgery, Department of Surgery, Chang Gung Memorial Hospital, No. 6, W. Sec., Jiapu Rd., Puzih City, Chiayi County 613, Taiwan (ROC). Tel.: +886 5 362 3511; fax: +886 5 3623002.
    Affiliations
    Division of Neurosurgery, Department of Surgery, Chang Gung Memorial Hospital, Chiayi, Chang Gung University College of Medicine, Taiwan, ROC
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Published:April 07, 2014DOI:https://doi.org/10.1016/j.ajem.2014.03.045

      Abstract

      Background

      Blood urea nitrogen (BUN)/creatinine (Cr) ratio was recently reported to be an independent predictor of stroke-in-evolution (SIE) among patients who had suffered acute ischemic stroke. We aim to determine if providing hydration therapy to patients with a BUN/Cr 15 reduces the occurrence of SIE after acute ischemic stroke.

      Methods

      This prospective interventional study included 189 patients (hydration group, n = 92; control group, n = 97) with acute ischemic stroke and a BUN/Cr 15. Hydration group received intravenous bolus (300-500 mL) saline followed by a maintenance saline infusion (40-80 mL/h for the first 72 h), while control group received maintenance saline infusion (40-60 mL/h for the first 24 h and 0-60 mL/h for 24-72 h). The study endpoint was the proportion of patients who developed SIE within the first three days of emergency department admission.

      Results

      There were no significant differences in demographic or clinical characteristics between both groups. Patients in the hydration group received a significantly larger (all P < 0.001) median volume of infused saline than patients in the control group on Days 1 (2400 vs 1440 mL), 2 (1440 vs 0 mL), and 3 (1000 vs 0 mL). The proportion of patients who experienced SIE was significantly lower in the hydration group (9/92; 9.8%) compared with the control group (21/97; 21.6%) (Fig. 1, P = 0.026).

      Conclusions

      Our preliminary findings suggest that providing patients with acute ischemic stroke hydration therapy on the basis of their presenting BUN/Cr ratio may help reduce the occurrence of SIE and therefore improve prognosis.
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