白细胞脂酶活性测定也可作为慢性中耳感染的一个依据指标。通过实验方法来评价利用该酶在病变各阶段的水平以区分感染的存在和严重程度的潜能。中耳渗出液取自儿科患者，年龄2～17岁，均曾作鼓膜切开且固定置管，手术前，患者被分作3类：①无中耳炎体征和病史，中耳病变限局化 Determination of leukocyte lipase activity can also be used as a basis for chronic middle ear infections. The potential for using the enzyme at various stages of the lesion to assess the presence and severity of the infection is assessed experimentally. Middle ear exudates from pediatric patients, aged 2 to 17 years old, have been tympanostomy and fixed catheterization, before surgery, patients were divided into three categories: ① no signs and history of otitis media, middle ear lesions limited