传统概念认为,异食癖是指强制性地食人某些不适当的东西,但目前已将这一名词扩展到对食物的过量偏食。因此,异食癖可指强制性地食入任何异常数量种类的食品或物品。异食癖的病因一直没有满意的解释,Coltaman,Crosby等人曾认为是缺铁所致,但Okcuogiy等人认为缺铁可能是异食癖的后果。Chisholw,Danford等人报告异食癖与某些微量元素,尤其是锌缺乏有关。Bickknll认为异食癖与心理异常有关。晚近,Gelfand,Litt等人报告在透析病人中发生并导致致命性的高钾血症。Gottheiner等人报告在一些病人肾移植后异食癖消失。但迄今尚无对肾功能不全病人异食癖发病率的观察资料。本文对四组肾脏病人进行比较研究:1)透析患者41人,其中血透29人,腹透(CAPD)12人;2)肾功能不全34人,血肌酐均>300μmol/L,但从未透 According to the traditional concept, pica is defined as the impotence of eating someone in the wrong place, but the term has been extended to over-eclipse on food. Therefore, pica may imply the mandatory consumption of any unusual number of types of food or articles. The etiology of pica has not been satisfactorily explained by Coltaman, Crosby and others who thought it was due to iron deficiency, but Okcuogiy et al. Concluded that iron deficiency may be a consequence of pica. Chisholw, Danford and others report that pica is associated with certain micronutrients, especially zinc deficiency. Bickknll thinks pica is related to mental disorders. More recently, Gelfand, Litt, et al. Reported that they occur in dialysis patients and cause fatal hyperkalemia. Gottheiner et al. Reported a loss of pica after kidney transplantation in some patients. But so far there is no observation of the incidence of pica in patients with renal insufficiency. In this study, we compared four groups of kidney patients: 1) 41 patients undergoing dialysis, including 29 hemodialysis patients and 12 patients with peritoneal dialysis (CAPD); 2) 34 patients with renal dysfunction with serum creatinine> 300 μmol / L but never through