The changes of the three parameters of the duration to peak (T) of 13CO2 DOB (delta over baseline) curve, 13CO2 maximum metabolisation Velocity (MVmax) and 13CO2 cumulative dose within 60 minutes (CUM60) were determined.

• 观察13CO2丰度曲线(DOB曲线)达峰时间(T)、13CO2代谢速率峰值(MVmax)、和60min13CO2累积丰度(CUM60)三个参数的变化。