Ultrasound Assessment Of Gastric Emptying In The Third Trimester Of Pregnancy

Objective: To observe if obesity and different drinks have impact on gastric emptying in pregnant women with ultrasound.Methods: Sixty subjects were divided into 4 groups according to the classification of the morbidly obese pregnant women and different kinds of drinks.W group: normal nonpregnant women;N group: the nonobese pregnant women with water;M group: the morbidly obese pregnant women with water;S group: the nonobese pregnant women with Carb-Rich Beverage.200ml clear liquids were ingested before examination(water in W group,N group and M group,carb-Rich Beverage in S group).Antral CSA(crosssectional area)(?/4*AP*CC)in the semi-sitting position were recorded at the following time points: pre-ingestion,0min,30 min,60 min and 120 min after ingestion.Gastric emptying was defined when the antral CSA is less than or equal to the fasting condition.Results:1.There were no significant differences in subjects' general conditions in all groups.2.The gastric emptying was no significant difference between W group and N group,after drink water 30 minutes,60minutes and 120 minutes(P>0.05).3.Antral CSA was significantly higher in the M group compared with the N group at pre-ingest(P<0.05).The gastric emptying was no significant difference between N group and M group,after drink water 30 minutes,and60minutes(P>0.05).4.The gastric emptying was no significant difference between N group and S group,after drink water 30minutes(P>0.05).The rate of gastric emptying was significantly higher in N group than S group,after drink water 60minutes(P<0.05).Antral CSA can reach fasting baseline levels within 120 minutes in both groups.Conclusion:1.The gastric volume of pregnant women who drink water or Carb-Rich Beverage can reach baseline within 120 minutes.2.Morbidly obese pregnant women have a higher gastric volume than the nonobese pregnant women after fasting 8 hours.No differences were observed in gastric emptying after drink water between mobidly obese pregnant women and nonobese pregnant women.3.The gastric-emptying-rate of pregnant women who drink Carb-Rich Beverage was lower than the pregnant women who drink water,after drink liquid 60 minutes.