Bell S J, Molnar J A, Krasker W S, Burke J F
J Am Diet Assoc. 1985 Sep;85(9):1100-4.
Although many of the current nutrition assessment techniques are inappropriate for burned patients, we have found nitrogen balance to be a helpful measure of the effectiveness of nutrition therapy if it is used in conjunction with other measures of nutritional status. Many clinicians suggest that a 24-hour urinary urea nitrogen (UUN) measurement, in addition to a correction term of 2 to 4 gm nitrogen, will accurately represent all nitrogen losses (urinary non-urea nitrogen, fecal, integumental). However, since no burned patients were used in the development of that method, its use may not be appropriate for burned patients. As an alternative to total urinary nitrogen (TUN), which is costly and time consuming, we have developed a simple way to predict TUN from UUN, percent initial total body surface area burn, and age for pediatric and adult burned patients. We propose that nitrogen balance may then be determined from the predicted TUN by an equation showing that nitrogen balance equals daily nitrogen intake minus predicted TUN plus fecal and normal nitrogen loss.
虽然目前许多营养评估技术不适用于烧伤患者，但我们发现，如果将氮平衡与其他营养状况指标结合使用，它是衡量营养治疗效果的一项有用指标。许多临床医生建议，除了2至4克氮的校正项外，24小时尿尿素氮（UUN）测量将准确代表所有氮损失（尿非尿素氮、粪便、皮肤）。然而，由于该方法的开发未使用烧伤患者，其应用可能不适用于烧伤患者。作为总尿氮（TUN）的替代方法，TUN成本高且耗时，我们开发了一种简单的方法，可根据UUN、初始烧伤总面积百分比以及儿科和成人烧伤患者的年龄来预测TUN。我们建议，然后可以通过一个方程式从预测的TUN中确定氮平衡，该方程式表明氮平衡等于每日氮摄入量减去预测的TUN加上粪便和正常氮损失。
