Summary
The relationships between gastric emptying and intragastric distribution of glucose and oral glucose tolerance were evaluated in 16 healthy volunteers. While sitting in front of a gamma camera the subjects drank 350 ml water containing 75 g glucose and 20 MBq 99mTc-sulphur colloid. Venous blood samples for measurement of plasma glucose, insulin and gastric inhibitory polypeptide were obtained at — 2, 2, 5, 10, 15, 30, 45, 60, 75, 90, 105, 120 and 150 min. Gastric emptying approximated a linear pattern after a short lag phase (3.3±0.8 min). The 50% emptying time was inversely related to the proximal stomach 50% emptying time (r=−0.55, p<0.05) and directly related to the retention in the distal stomach at 120 min (r=0.72, p<0.01). Peak plasma glucose was related to the amount emptied at 5 min (r=0.58, p<0.05) and the area under the blood glucose curve between 0 and 30 min was related to the amount emptied at 30 min (r=0.58, p<0.05). In contrast, plasma glucose at 120 min was inversely related to gastric emptying (r=−0.56, p<0.05) and plasma insulin at 30 min (r=−0.53, p<0.05). Plasma insulin at 120 min was inversely related (r=−0.65, p<0.01) to gastric emptying. The increase in plasma gastric inhibitory polypeptide at 5 min was related directly to gastric emptying (r=0.53, p<0.05). These results indicate in normal subjects that (i) gastric emptying accounts for about 34 % of the variance in peak plasma glucose after a 75-g oral glucose load (ii) plasma glucose levels at 120 min are inversely, rather than directly, related to gastric emptying (iii) the distal stomach influences gastric emptying of glucose.
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Horowitz, M., Edelbroek, M.A.L., Wishart, J.M. et al. Relationship between oral glucose tolerance and gastric emptying in normal healthy subjects. Diabetologia 36, 857–862 (1993). https://doi.org/10.1007/BF00400362
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DOI: https://doi.org/10.1007/BF00400362