並列タイトル等酸化マグネシウム内服中の高齢外来患者における腎機能と血清マグネシウム濃度の関係
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AIMS: We investigated the relationship between renal function and serum magnesium concentration in elderly patients treated with magnesium oxide (MgO) in an outpatient setting of an urban hospital in Japan.METHODS: In the present study, 44 elderly outpatients (23 patients with constipation treated with daily oral MgO and 21 untreated patients in the control group) who visited Kameyama municipal medical center were enrolled. Variables were age, sex, weight, height, serum magnesium concentration, serum blood urea nitrogen level, serum creatinine level, use of other magnesium-containing supplements and symptoms associated with hypermagnesemia. We calculated the estimated glomerular filtration rate (eGFR) and classified patients based on eGFR category.RESULTS: Compared with the control group, the MgO group showed a significantly higher concentration of serum magnesium (median 2.2 mg/dL [interquartile range 2.1-2.3] vs 2.4 mg/dL [2.2-2.6], P < 0.001). Hypermagnesemia (>2.6 mg/dL) was noted only in the MgO group. However, symptoms associated with hypermagnesemia occurred in patients from both groups, with no significant difference between groups. In the MgO group, significant difference was seen in the median serum magnesium concentration between eGFR categories (P < 0.05). The category G4 (eGFR 15-29 mL/min/1.73 m(2) ) group had the highest serum magnesium concentration in the MgO group (3.0 mg/L [2.9-3.1]).CONCLUSIONS: Elderly patients treated with MgO have higher serum magnesium levels compared with the control group. MgO should be prescribed with caution in patients with low renal function as shown by a GFR category G3b or less (eGFR < 30 mL/min/1.73 m(2) ). Geriatr Gerontol Int 2016; 16: 600-605.
本文 / Department of Internal Medicine, Kameyama Municipal Medical Center, Kameyama, Mie, Japan
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DOIinfo:doi/10.1111/ggi.12530
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