Marcilese N A, Ghezzi M D, Aba M A, Alzola R A, Solana H, Valsecchi R M
Departamento de Fisiopatología, Facultad de Cs. Veterinarias, UNCPBA, Prov. de Bs. As., Argentina.
Acta Physiol Pharmacol Ther Latinoam. 1994;44(1-2):36-42.
Body water (BW) and extracellular water (ECW), were determined with tritiated water (THO) and 82Br injected into the vein, to 8 mature animals of both sexes during the winter season. The biological half-time of THO (T1/2 THO) and the daily water turnover (WT) were measured and the intracellular water (ICW) calculated. The studies with THO were repeated in the same animals and in 2 lactating females in spring and summer. Two calves were also studied during spring. The values obtained in winter were: BW 659 +/- 12 ml/kg; T1/2 THO 9.2 +/- 1 day; WT per 24 h 50 +/- 3 ml/kg or 116 +/- 5 ml/kg 82 and 163 +/- 9 ml per 1 of BW82; ECW 215 +/- 8 ml/kg or 32.5 +/- 3% BW; ICW 447 +/- 12 ml/kg or 67.7 +/- 4% BW. The results of the spring's studies showed a significant increase in the values of WT. In summer a further increment of this parameters was observed when expressed as ml/kg body solids. This differences were remarkable in those in lactation. The proportion of water in the body was significantly higher during summer in all animals. BW in lactating animals during summer was 783 +/- 9 ml/kg and in the other animals 718 +/- 18; T1/2 THO values were 3.3 +/- .-06 and 4.5 +/- .4 day, respectively. WT was 396 +/- 9 ml/kg.82 or 484 +/- 8 ml/l BW82 in the lactating animals and 260 +/- 9 ml/kg 82 or 341 +/- 12 ml/l BW82 in the other animals.(ABSTRACT TRUNCATED AT 250 WORDS)
在冬季，将氚水（THO）和溴-82注入静脉，对8只成年雌雄动物测定其身体水分（BW）和细胞外液（ECW）。测量了THO的生物半衰期（T1/2 THO）和每日水分周转率（WT），并计算了细胞内液（ICW）。在春季和夏季，对相同动物以及2只泌乳雌性动物重复进行了THO研究。春季还对2头小牛进行了研究。冬季获得的值为：BW 659±12 ml/kg；T1/2 THO 9.2±1天；每24小时WT 50±3 ml/kg或116±5 ml/kg 82以及每升BW82 163±9 ml；ECW 215±8 ml/kg或32.5±3% BW；ICW 447±12 ml/kg或67.7±4% BW。春季研究结果显示WT值显著增加。夏季，当以每千克身体固体表示该参数时，观察到该参数进一步增加。这些差异在泌乳动物中尤为显著。所有动物夏季体内水分比例显著更高。夏季泌乳动物的BW为783±9 ml/kg，其他动物为718±18；T1/2 THO值分别为3.3±0.06和4.5±0.4天。泌乳动物的WT为396±9 ml/kg.82或484±8 ml/l BW82，其他动物为260±9 ml/kg 82或341±12 ml/l BW82。（摘要截短于250字）
