Klin Farmakol Farm. 2003;17(3):139-144
In the present study, an Oral Glucose Tolerance Test (OGTT) was performed in healthy volunteers. Subsequently, on the basis of measured data, a mathematical model was developed, capable to account for the effect of the gastric-emptying process on glycemia in OGTT. The model performance is exemplified by results of model fits to the measured glucose concentration-time profiles in plasma of the volunteers. The modeling results revealed that the volunteers could be divided into three groups: The volunteers of the first group which exhibited high values of the apparent clearance of glucose, i. e. 0.63±0.08 l/min (arithmetic meanstandard deviation), and two glucose fractions sequentially disposable for absorption. The volunteers of the second group which exhibited medium values of the apparent clearance of glucose, i.e. 0.28±0.18 l/min, and three glucose fractions sequentially disposable for absorption. Finally, the volunteers of the third group which exhibited low values of the apparent clearance of glucose, i. e. 0.06±0.02 l/min, and three glucose fractions sequentially disposable for absorption. In the first group, the first and second fraction of glucose disposable for absorption ranged 47.8-98.8 and 1.2-52.2% of the glucose dose, respectively. In the second group, the first, second, and third fraction of glucose fraction disposable for absorption ranged 6.1-70.4, 22.4-76.0, and 3.0-70.1 % of the glucose dose, respectively. In the third group, the first, second, and third fraction of glucose fraction disposable for absorption ranged 20.5-95.6, 3.9-51.6, and 0.5-31.9% of the glucose dose, respectively.
Published: December 31, 2003 Show citation
In the present study, a frequently sampled Oral Glucose Tolerance Test (OGTT) was performed in healthy volunteers. Subsequently, on the basis of measured data, a mathematical model was developed, capable to account for the effect of the gastric-emptying process on glycemia in OGTT. The model performance is exemplified by results of model fits to the measured glucose concentration-time profiles in plasma of the volunteers. The modeling results revealed that the volunteers could be divided into three groups: The volunteers of the first group which exhibited high values of the apparent clearance of glucose, i. e. 0.63±0.08 l/min (arithmetic mean ± standard deviation), and two glucose fractions sequentially disposable for absorption. The volunteers of the second group which exhibited medium values of the apparent clearance of glucose, i. e. 0.28±0.18 l/min, and three glucose fractions sequentially disposable for absorption. Finally, the volunteers of the third group which exhibited low values of the apparent clearance of glucose, i. e. 0.06±0.02 l/min, and three glucose fractions sequentially disposable for absorption. In the first group, the first and second fraction of glucose disposable for absorption ranged 47.8-98.8 and 1.2-52.2% of the glucose dose, respectively. In the second group, the first, second, and third fraction of glucose fraction disposable for absorption ranged 6.1-70.4, 22.4-76.0, and 3.0-70.1 % of the glucose dose, respectively. In the third group, the first, second, and third fraction of glucose fraction disposable for absorption ranged 20.5-95.6, 3.9-51.6, and 0.5-31.9% of the glucose dose, respectively.
V práci bol vykonaný často vzorkovaný orálny glukózový test (OGTT) u zdravých dobrovoľníkov. Následne na základe nameraných dát bol vyvinutý matematický model, ktorý umožňuje vystihnúť vplyv procesu gastrického vyprázdňovania na glykémiu v OGTT. Funkčnosť modelu je ukázaná na príkladoch znázorňujúcich ako model umožnil získať aproximácie nameraných koncentračných profilov glukózy v plazme u dobrovoľníkov. Z výsledkov modelovania vyplýva že dobrovoľníkov bolo možné rozdeliť do troch skupín: Dobrovoľníci prvej skupiny vykazovali vysoké hodnoty zdanlivej clearance glukózy, t. j. 0,63±0,08 l/min (aritmetický priemer ± štandardná odchylka), a dve frakcie glukózy ktoré boli postupne k dispozícii pre absorpciu. Dobrovoľníci druhej skupiny vykazovali stredné hodnoty zdanlivej clearance glukózy, t. j. 0,28±0,18 l/min, a tri frakcie glukózy ktoré boli postupne k dispozícii pre absorpciu. Dobrovoľníci tretej skupiny vykazovali nízke hodnoty zdanlivej clearance glukózy, t. j. 0,06±0,02 l/min, a tri frakcie glukózy ktoré boli postupne k dispozícii pre absorpciu. V prvej skupine dobrovoľníkov, prvá frakcia glukózy ktorá bola k dispozícii pre absorpciu bola v rozsahu 47,8-98,8 a druhá frakcia v rozsahu 1,2-52,2 % dávky glukózy. V druhej skupine dobrovoľníkov, prvá frakcia glukózy ktorá bola k dispozícii pre absorpciu bola v rozsahu 6,1-70,4, druhá 22,4-76,0 a tretia 3,0-70,1 % dávky glukózy. V tretej skupine dobrovoľníkov, prvá frakcia glukózy ktorá bola k dispozícii pre absorpciu bola v rozsahu 20,5-95,6, druhá 3,9-51,6 a tretia 0,5-31,9 % dávky glukózy.
OGTT, gastrické vyprázdňovanie, model, časové oneskorenie, systémový prístup.
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