,化疗相关性呕吐的研究进展,NauseaandVomiting,1、恶心：咽部及上腹部不适，胃张力和蠕动减弱，幽门和贲门开放。2、干呕：胃窦部和腹壁肌肉收缩，腹压增加，食管及咽部开放。3、呕吐：胃和/或小肠内容物经食管和口腔排除体外。,Definitionofemesis.(Threephases)呕吐反射过程（三个阶段）,1.Nausea-theinclinationorfeelingofimminentdesiretovomit,usuallyfeltinthethroatorepigastrum.Associatedwithdecreasedactivityofthestomach.2.Retching-thelaboredrhythmiccontractionofrespiratoryandabdominalmusculaturethatfrequentlyprecedesoraccompaniesvomiting.3.Vomiting-theforcefuloralexpulsionofgastriccontentsviaretroperistalsis.(Abdominal
