应用液体营养负荷试验评估健康人近端胃功能

目的评价饮入速度不同的液体营养负荷试验(LNLT)对近端胃功能的影响。方法40名健康受试者在不连续的2 d中,分别以快速(100 mL/min)和慢速(15 mL/min)模式饮入热量密度为1 kcal/mL的液体营养餐。记录阈值饮入量(TVDRI)、最大饮入量(MVDRI),同时B超测定相应的近端胃容积(TVPS和MVPS)。结果①两种模式的饮入量与近端胃容积间均存在正相关性;②慢速模式中的TVDRI及MVPS均小于快速模式、而慢速模式的MVDRI明显大于快速模式;③慢速模式中TVDRI与TVPS较快速模式更加接近,而快速模式中MVDRI与MVPS较慢速模式中更接近。结论两种速度模式的液体营养负荷试验测定的参数可反映近端胃感觉和胃适应性功能;胃感觉和胃适应性具有相关关系。慢速模式的阈值饮入量更敏感地反映近端胃感觉功能,而快速模式的最大饮入量更能反映近端胃适应性调节功能。

Application of liquid nutrient load test in the assessment of proximal stomach function

ObjectiveTo compare the difference effects on the proximal stomach in rapid(intake rate 100 mL/min) and slow(intake rate 15 mL/min) LNLT.Methods Forty healthy subjects received both the rapid and slow LNLTs.The caloric density of the nutrient was 1 kcal/mL. The TVDRI and MVDRI were recorded,and the corresponding TVPS and MVPS were measured by B-ultrasound.Results(1) There were positive correlation was identified between TVDRI and TVPS,and between MVDRI and MVPS in both slow and rapid LNLTs.(2) TVDRI and MVPS in slow LNLT were significantly smaller than those in rapid LNLT,but MVDRI was significantly larger in slow LNLT than that in rapid LNLT.(3) TVDRI was much closer to TVPS in slow LNLT than those in rapid LNLT.But MVDRI was much closer to MVPS in rapid LNLT than those in slow LNLT.Conclusion Both slow and rapid LNLTs could be used to evaluate the accommodation to a meal and visceral sensitivity of the proximal stomach.The visceral sensitivity is related to the accommodation function.TVDRI of slow LNLT is more sensitive in estimating the visceral sensitivity of the proximal stomach;MVDRI of rapid LNLT is more accurate in estimating the accommodation of the proximal stomach.