胃为水谷之海．资生之本也．故曰有胃气则生．无胃气则死．胃脉六部皆有．盖六部皆有浮中沉．中即胃脉也．此处分别甚难．即于足阳明候之．使其脉中和．无过不及．急疾则为无胃气．丹溪更有候胃气法．谓男子以气成胎．则气为之主．女子挟血成胎．则血为之主．男人久病．右脉克于左者．有胃气也．病虽重可治．女人久病．左脉克于右者．有胃气也．病虽重可治．反此者虚之甚也．更有趺阳．亦胃气脉．在足跗上五寸骨间．动脉波阳者．是病重．切其旺衰．以决死生．