目的 探讨Ki-67、微小染色体维持蛋白2（MCM2）、p16在宫颈鳞状上皮内病变中的表达及其临床意义。方法 采用免疫组化检测Ki-67、MCM2、p16在宫颈炎症组14例、低级别鳞状上皮内病变（LSIL）组47例、高级别鳞状上皮内病变（HSIL）组49例中的表达情况,以病理结果作为金标准,对结果进行统计分析。结果 HSIL组中Ki-67、MCM2、p16阳性率均高于炎症组和LSIL组（均P<0.017）。HSIL组中Ki-67、MCM2过表达率均显著高于炎症组和LSIL组（均P<0.017）。随着宫颈病变级别增加,Ki-67及MCM2阳性范围从基底层至表层逐渐扩大。MCM2及Ki-67在LSIL组中表达模式多为基底层的非过表达模式,HSIL组多为中层及以上的过表达模式。Spearman相关性分析显示,MCM2和Ki-67在宫颈鳞状上皮内病变中的表达强度之间呈正相关（r=0.801,P<0.05）;p16与MCM2在宫颈鳞状上皮内病变中的表达呈正相关（r=0.559,P<0.05）;p16与Ki-67在宫颈鳞状上皮内病变中的表达呈正相关（r=0.478,P<0.05）。结论 p16阳性提示宫颈高级别鳞状上皮内病变。MCM2与Ki-67在宫颈鳞状上皮内病变中的表达具有较高一致性,MCM2可作为宫颈鳞状上皮内病变新的增殖标志物。

Objective To investigate the expression and significance of Ki-67,MCM2 and p16 in cervical intraepithelial lesions．Methods The expressions of Ki-67,MCM2 and p16 in cervicitis group（14 cases）,low-grade squamous intraepithelial lesion（LSIL） group（47 cases）and high-grade squamous intraepithelial lesion（HSIL） group（49 cases）were detected by immunohistochemistry．The pathological results were used as the gold standard for statistical analysis．Results The positive rates of Ki-67,MCM2 and p16 in HSIL group were significantly higher than those in cervicitis group and LSIL group（P<0.017）．The over-expression rates of Ki-67,MCM2 in HSIL group were significantly higher than those in cervicitis group and LSIL group（P<0.017）．With the increase of cervical lesion grade,the positive range of Ki-67 and MCM2 gradually expanded from basal layer to surface layer．The expression patterns of MCM2 and Ki-67 in LSIL group were mostly non-overexpressed in the basal layers,while those in HSIL group were mostly overexpressed in the middle layer and above．Spearman correlation analysis showed that the expression intensity of MCM2 and Ki-67 in cervical squamous intraepithelial lesions was positively correlated（r=0.801,P<0.05）．There was a positive correlation between the expression of p16 and MCM2 in cervical squamous intraepithelial lesions（r=0.559,P<0.05）．There was a positive correlation between the expression of p16 and Ki-67 in cervical squamous intraepithelial lesions（r=0.478,P<0.05）．Conclusions Positive p16 indicates high-grade squamous intraepithelial lesion．The expression of MCM2 and Ki-67 in cervical intraepithelial lesions is highly consistent．MCM2 can be used as a new proliferative marker for cervical intraepithelial lesions．

目的 评价早产儿经胃管喂养后采用空气冲管的应用效果。方法 选择2021年1月–2021年12月广州市第一人民医院收治的经胃管喂养后采用温水冲管的60例早产儿为对照组,选择2022年1月–2022年12月收治的经胃管喂养后采用空气冲管的57例早产儿为研究组。喂养1周后,比较两组患儿体质量增加量、血清白蛋白浓度增加量、大便量、喂养不耐受发生率、胃管堵塞率等指标的差异。结果 无患儿发生胃管堵塞。研究组的血清白蛋白浓度增加量[（2.86±5.61）g/L]高于对照组[（0.84±5.27）g/L]（P<0.05）,而两组患儿在体质量增加量、大便量、喂养不耐受发生率等方面比较差异无统计学意义（P>0.05）。多元线性回归分析结果显示空气冲管为血清白蛋白浓度增加量的影响因素（P<0.05）。结论 采用空气进行胃管冲管的方法可改善早产儿的营养状态。

Objective To evaluate the effects of flushing gastric tube by air after feeding in premature infants．Methods A total of 60 premature infants admitted to Guangzhou First People's Hospital from January 2021 to December 2021 whose gastric tube were flushed with water after feeding were selected as the control group,while 57 admitted from January 2022 to December 2022 whose gastric tube were flushed with air after feeding were selected as the study group．After 1 week of feeding,the differences of weight increase,serum albumin concentration increase,stool volume,feeding intolerance incidence and gastric tube blockage rate were compared between the 2 groups．Results No gastric tube blockage occurred．The increase of serum albumin concentration in the study group[（2.86±5.61）g/L] was significantly higher than that in the control group[（0.84±5.27）g/L]（P<0.05）,but there were no significant differences in weight increase,stool volume and feeding intolerance incidence between the 2 groups．Multiple linear regression analysis showed that the flushing gastric tube with air was an independent influencing factor for the increase of serum albumin（P<0.05）．Conclusions Flushing gastric tube with air can improve the nutritional status of premature infants,which is worthy of clinical application．