NITROGEN BALANCE STUDIES ON SURGICAL PATIENTS RECEIVING AMINO ACIDS

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Abstract
In the six years that have elapsed since Elman and Weiner1first succeeded in giving amino acids intravenously to human beings, the parenteral administration of amino acids in the form of specially prepared protein hydrolysates has become an established clinical procedure. This has been particularly true in the management of cases of gastrointestinal diseases in which the existence of protein deficiency is usually easily recognized and in which the possibility of oral alimentation is limited or impossible. At first glance the nutritional value of such a method of feeding would appear obvious. However, many factors are involved in its successful application. Even though the products available for parenteral use are derived from nutritionally good proteins, it is not safe to assume them to be adequate until they are proved by proper studies under controlled conditions to be able to provide nitrogen balance. Also, it is necessary to recognize the

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