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The preoperative nutritional assessment of surgical patients with hepatic dysfunction.
Surgery Today 1995
The precise influence of malnutrition on postoperative complications in patients with hepatic dysfunction is not well known. In phase I of the present study, we evaluated the nutritional status of 102 patients with hepatic dysfunction who were admitted for elective hepatobiliary or pancreatic surgery, and a model for the prediction of postoperative complications was developed using a computer-based stepwise regression procedure. The equation for this Prognostic Nutritional Index for Surgery (PNIS) was calculated by [-0.147 x (% weight change) + 0.046 x (% ideal body weight) + 0.010 x (actual triceps skinfold thickness as a % of standard value) + 0.051 x (hepaplastintest)]. In phase II this model was prospectively tested in 182 patients, including 145 with hepatic dysfunction. A total of 18 patients were classified as having a poor prognosis (PNIS < 5) and all of these patients in fact developed postoperative complications: 128 patients were classified as having an intermediate prognosis (5 < or = PNIS < 10), 23 (18.0%) of whom developed postoperative complications, and none of the 36 patients who were classified as having a good prognosis (PNIS > or = 10) developed any postoperative complications. These results demonstrate the importance of performing a thorough preoperative nutritional assessment of patients with hepatic dysfunction as malnourished patients with PNIS < 10 may need preoperative nutritional management, even when their surgical procedures are not major.
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