…The maximum urine concentrating power of the kidneys, expressed in terms of the aforementioned urine osmolality concentration, is 1400 mOsm (about 4.5 times the plasma osmolality), but since an average person must excrete 600 to 700 mOsm of osmotically effective unnecessary substances per day, it is absolutely necessary to excrete at least 400 to 500 ml of water. This urine volume is called the obligatory urine volume. The aforementioned boundary value for oliguria is equal to this value, and even normal people will produce this amount of urine when restricting water intake. … *Some of the terminology that refers to "obligatory urine volume" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…腎臓の最大尿濃縮力を前述の尿浸透圧濃度で表現すると,1400mOsm(血漿浸透圧の約4.5倍)であるが,ふつうのヒトは1日当り600~700mOsmの浸透圧的に有効な不要物質を排出しなければならないので,最低400~500mlの水の排出が絶対的に必要となる。この尿量を不可避的尿量(強制的尿量)obligatory urine volumeという。前述の乏尿の境界値はこの値と等しく,正常人でも水制限をしたときにはこの程度の尿量となる。… ※「obligatory urine volume」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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