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고음이온차 대사성산증에서 요 삼투질농도차와 요증 암모늄 배설의 상관성 ; 요 음이온차와 비교
정용영(Yong Young Jung),한성우(Sung Woo Han),박민숙(Min Sook Park),김권수(Gwan Soo Kim),김근호(Gheun Ho Kim),조윤숙(Yoon Sook Cho),주권욱(Kwon Wook Joo),한진석(Jin Suk Han),김성권(Suhng Gwon Kim),이정상(Jung Sang Lee) 대한내과학회 1997 대한내과학회지 Vol.53 No.1
Objectives: Urine anion gap(UAG) and urine osmolal gap(UOG) were proposed as indirect measures of urine ammonium(NF4+). While the former is known to have its usefulness limited to hyperchloremic metabolic acidosis, the latter is reported to have its correlation with urine NE4+ in ketoacidosis. This study was undertaken to evaluate the correlation of urine NH with IJOG in high anion gap metabolic acidosis(AGMA) and to compare it with UAG. Methods: We measured urine NH' by enzymatic determination, UOG(=0.5×[urine osmolality-{2×(Na++K+)+urea+glucose)]), and UAG(=Na++K+-Cl-) in 18 patients(serum AG=24.4±1.6mmol/L ) with AGMA. Results: When they were grouped into those with acute disorders(n=11) and those with chronic disorder(n=7), urine Nk4+ concentration was higher (p<0.05) in the acute(35.6±7.7mmol/L) than in the chronic(3.8±0.9mmol/L) group. The UOG was higher (p<0.05) in the acute(73.2±18.9mmol/L) than in the chronic(6.3±8.7mmol/L) group, but the UAG had no difference between the two groups. When both groups of the patients were considered together, urine NH concentration correlated with the UOG (r=0.90, p<0.01), but not with the UAG. While the patients with lower urine NH4+ excretion(<30mmol/d) had the UOG<40mmol/L, those with higher urine NH' excretion(>40mmol/d) had the UOG>40mmol/L. Conclusion: In contrast to the UAG, the UOG has a significant correlation with urine NH4+ in AGMA.