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Japanese

DISCREPANT EXCRETION VOLUME (DV):A NEW NOMOGRAM FOR CLINICAL DIAGNOSIS AND TREATMENT OF DIABETES INSIPIDUS AND INAPPROPRIATE SECRETION OF ADH IN NEUROSURGICAL PATIENTS Shigekuni Tachibana 1 , Yoshio Miyasaka 1 , Takeshi Saito 1 , Hiroshi Takagi 1 , Takashi Ohwada 1 , Kenzoh Yada 1 1Department of Neurosurgery, School of Medicine, Kitasato University pp.741-749
Published Date 1977/7/1
DOI https://doi.org/10.11477/mf.1406204097
  • Abstract
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Hypernatremia due to Diabetes Insipidus (DI), and hyponatremia due to Inappropriate Secretion of Anti-Diuretic Hormone (ISADH) are well recog-nized clinical entities. In these situations two main essential elements play important roles, one being free water metabolism and the other being sodium metabolism. In DI, excessive free water excretion and sodium retention occur in the setting of hyper-natremia. In ISADH, excessive free water retention and sodium excretion occur under the condition of hyponatremia.

The authors have devised a new nomogram, calculated from free water clearance (CH2O) and sodium clearance (CNa), to determine accurate dynamics of sodium free water. From this nomo-gram, the Discrepant Excretion Volume (DV) of sodium free water can easily be calculated. This value indicates whether the serum sodium level is moving towards concentration or towards dilution. When the DV is lower than the normal range on this nomogram, it indicates the presence of over dilution; that is, ISADH. When the DV is over the normal range, it indicates the presence of DI.

The authors have calculated the Discrepant Ex-certion Volume on twenty controll cases, twelve ISADH cases, and five DI cases. They found that the DV is a good indicator not only for early diagnosis but also for determination of proper timing and dosage of exogenous antidiuretic hormone in DI, and the timing and duration of water restriction in ISADH.


Copyright © 1977, Igaku-Shoin Ltd. All rights reserved.

基本情報

電子版ISSN 2185-405X 印刷版ISSN 0006-8969 医学書院

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