Postprandial blood concentrations of insulin-independent carbohydrate, galactose, in oral test after gastric surgery.

In order to examine the postprandial blood concentrations of insulin-independent carbohydrates after gastric surgery oral galactose test (1.65 g/kg body weight in water, 33%, w/v) was performed in 55 symptomatic patients and in 5 healthy subjects. There were patients after total gastrectomy (TG) (n = 17), gastric resection with (GRS, n = 17) or without (GR; n = 12) selective vagotomy, and after proximal selective vagotomy (PSV, n = 9). The patients had immediately after drinking the test solution a 2- to 5-fold higher blood galactose concentration than the healthy subjects. The TG patients had the most rapid, the healthy subjects the slowest and the GR and GRS patients an intermediate rapid, immediate increase of blood galactose concentration. The TG patients showed a plateau 40–60 min and a decrease 60–90 min after the start of the test. The PSV patients showed a plateau 60–90 min after the commencement of the test. The GR and GRS patients and the healthy subjects had a continuous increase in blood galactose concentration during the whole test period, but the maximal point 90 min after the drinking of the solution was lower in the GRS than in the GR patients and lowest in the healthy subjects. The PSV patients had a lower blood galactose curve than the TG, GRS and GR patients but higher than the healthy subjects except the plateau 60–90 min postprandially. These results suggest that the postprandial blood concentration of insulin-independent carbohydrate, galactose, in symptomatic patients after gastric surgery relates with the type of operation and clearly deviates from healthy people.