Glucose absorption and small intestinal transit in critical illness.
Crit Care Med
; 39(6): 1282-8, 2011 Jun.
Article
em En
| MEDLINE
| ID: mdl-21336122
ABSTRACT
OBJECTIVES:
Although enteral nutrition is standard care for critically ill patients, nutrient absorption has not been quantified in this group and may be impaired due to intestinal dysmotility. The objectives of this study were to measure small intestinal glucose absorption and duodenocecal transit and determine their relationship with glycemia in the critically ill.DESIGN:
Prospective observational study of healthy and critically ill subjects.SETTING:
Tertiary mixed medical-surgical adult intensive care unit.SUBJECTS:
Twenty-eight critically ill patients and 16 healthy subjects were studied. MATERIALS AND MAINRESULTS:
Liquid feed (100 kcal/100 mL), labeled with Tc-sulfur colloid and including 3 g of 3-O-methylglucose, was infused into the duodenum. Glucose absorption and duodenocecal transit were measured using the area under the 3-O-methylglucose concentration curve and scintigraphy, respectively. Data are median (range). RESULTS ANDDISCUSSION:
Glucose absorption was reduced in critical illness when compared to health (area under the concentration curve 16 [1-32] vs. 20 [14-34] mmol/L·min; p = .03). Small intestinal transit times were comparable in patients and healthy subjects (192 [9-240] vs. 168 [6-240] min; p = .99) and were not related to glucose absorption. Despite higher fasting blood glucose concentrations (6.3 [5.1-9.3] vs. 5.7 [4.6-7.6] mmol/L; p < .05), the increment in blood glucose was sustained for longer in the critically ill (Δ glucose at t = 60; 1.9 [-2.1-5.0] mmol/L vs. -0.2 [-1.3-2.3] mmol/L; p < .01).CONCLUSIONS:
Critical illness is associated with reduced small intestinal glucose absorption, but despite this, the glycemic response to enteral nutrient is sustained for longer.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Trânsito Gastrointestinal
/
Estado Terminal
/
Duodeno
/
Glucose
/
Hiperglicemia
/
Absorção Intestinal
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Adult
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Aged
/
Aged80
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article