After detecting the antial areas at fasting state, R_(33), R_(87) and R_(117), DGP may be diagnosed and divided into two types - accelerated type and gastroparesis. Ultrasonography can be simplified.

• 结论超声法检查胃排空可靠，测定空腹和餐后33，87，117min的胃窦面积变化可诊断DGP及分型，即胃排空过速型和胃轻瘫，简化超声检查具可行性。