摘要目的 探讨难治性胃食管反流病(rGERD)不同亚型食管动力异常及其与反流特点的相关性.方法 收集2015年9月至2016年5月就诊的100例rGERD患者,全部行胃镜检查、食管高分辨率测压(HRM)和24 h食管动态pH值阻抗检测.根据胃镜检查结果分为难治性内镜检查阴性的反流疾病(NERD)组和难治性反流性食管炎(RE)组.分析各组食管动力学障碍异常及胃食管病理性反流情况.比较采用￡检验、秩和检验和卡方检验,通过多因素非条件Logistic回归分析其相关因素.结果 100例rGERD患者中,难治性NERD组83例,难治性RE组17例.难治性NERD组弱酸反流、气0液混合反流次数均高于难治性RE组[(80.2±56.9)次比(44.8±13.7)次,(56.0±25.6)次比(25.2±16.1)次],差异均有统计学意义(￡=3.202、2.229,P均＜0.05).难治性NERD组患者DeMeester评分、酸反流次数、反流时间百分比均低于难治性RE组[(24.2±8.5)分比(56.8±3.0)分,(21.4±11.8)次比(35.9±32.6)次,(7.1±1.6)％比(16.2±8.8)％],差异均有统计学意义(t=-2.820、-2.230、-2.604,P均＜0.05);而食管下括约肌平均静息压高于难治性RE组[(7.9±5.6)mmHg(1mmHg=0.133 kPa)比(4.5±2.2) mmHg],差异有统计学意义(t=2.443,P＜0.05).难治性NERD组和难治性RE组患者中食管动力障碍者分别为58例(69.9％)和12例(12/17),差异无统计学意义(P＞0.05).与难治性RE组相比,难治性NERD组患者间断收缩比例较高[1/17比26.5％ (22/83)]而蠕动收缩障碍发生率较低[11/17比43.4％ (36/83)],差异均有统计学意义(x2=3.389、2.587,P均＜0.05).多因素非条件Logistic回归分析表明,间断收缩、气体反流为发生病理性弱酸反流的危险因素(OR=3.139、1.254,P均＜0.05).BMI、气-液混合反流为发生病理性酸反流的危险因素(OR=1.302、1.026,P均＜0.05),而远端收缩积分为保护性因素(OR=0.998,P＜0.05).结论 rGERD患者中普遍存在食管动力异常,不同亚型组患者的动力学障碍不同,与其不同的反流特点相关.

abstractsObjective To investigate the correlation between esophageal motility abnormalities and the characteristics of gastroesophageal reflux in patients with different subtypes of refractory gastroesophageal reflux disease (rGERD).Methods From September 2015 to May 2016,a total of 100 rGERD patients were collected,all of whom received gastroendoscopy examination,high resolution manometry (HRM) and 24 h impedance-pH monitoring.According to the results of gastroendoscopy examination,the patients were divided into refractory non-erosive reflux disease (NERD) group and refractory reflux esophagitis (RE) group.Abnormal esophageal motility and pathological gastroesophageal reflux of each group were analyzed.Chi-square test,t test and sum-rank test were performed for comparison,the correlation factors were analyzed by multivariate unconditional Logistic regression.Results Among the 100 patients with rGERD,there were 83 cases in refractory NERD group and 17 in refractory RE group.The episodes of weak acid and gas-liquid mixed reflux of refractory NERD group were both significantly higher than those of refractory RE group (80.2±56.9 vs 44.8± 13.7,56.0± 25.6 vs 25.2±16.1);and the differences were statistically significant (t=3.202 and 2.229,both P＜ 0.05).The DeMeester score,acid reflux episodes and the percentage of reflux time of refractory NERD group were all significantly lower than those of refractory RE group (24.2±8.5 vs 56.8±3.0,21.4± 11.8 vs 35.9 ± 32.6,(7.1 ± 1.6) ％ vs (16.2 ± 8.8) ％),and the differences were statistically significant (t=-2.820,-2.230 and-2.604;all P＜0.05).However,the average resting pressure of lower esophageal sphincter was higher than that of refractory RE group ((7.9±5.6) mmHg (1 mmHg=0.133 kPa) vs (4.5±2.2) mmHg),and the difference was statistically significant (t=2.443,P＜0.05).Patients with esophageal motility disorders of refractory NERD group and refractory RE group were 58 cases (69.9 ％) and 12 cases (12/17),respectively,and the difference was not significant (P＞0.05).Compared with refractory RE group,the ratio of intermittent contraction was higher (1/17 vs 26.5％,22/83) and the peristaltic contraction disorder was lower in refractory NERD group (11/17 vs 43.4％,36/83);and the differences were statistically significant (x2 =3.389 and 2.587,both P ＜ 0.05).The results of multivariate non-conditional Logistic regression analysis showed that intermittent contraction and gas reflux were risk factors of the incidence of pathological weak acid reflux (odd ratio (OR) =3.139 and 1.254,both P＜0.05),while body mass index and gas-liquid mixed reflux were the risk factors of the occurrence of pathological acid reflux (OR =1.302 and 1.026,both P＜ 0.05),whereas the distal contractile integral was a protective factor (OR=0.998,P＜0.05).Conclusion Esophageal dysmotility is common in patients with rGERD,and the dysmotility disorders are different in patients with different subtypes,which may be related to the different reflux characteristics.