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Tytuł:
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Use of the refractometer as a tool to monitor dietary formula concentration in gastric juice.
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Autorzy:
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Chang WK; Department of Internal Medicine, Division of Gastroenterology, Tri-Service General Hospital, National Defense Medical Center, Taiwan, Republic of China.
Chen MZ
Chao YC
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Źródło:
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Clinical nutrition (Edinburgh, Scotland) [Clin Nutr] 2002 Dec; Vol. 21 (6), pp. 521-5.
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Typ publikacji:
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Evaluation Study; Journal Article
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Język:
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English
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Imprint Name(s):
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Publication: <2004->: Kidlington, Oxford, U.K. : Elsevier
Original Publication: Edinburgh ; New York : Churchill Livingstone, c1982-
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MeSH Terms:
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Enteral Nutrition*
Critical Care/*methods
Food, Formulated/*analysis
Gastric Juice/*chemistry
Refractometry/*methods
Critical Illness ; Gastric Emptying ; Gastric Juice/metabolism ; Humans ; Hydrogen-Ion Concentration ; Intubation, Gastrointestinal/adverse effects ; Temperature
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Entry Date(s):
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Date Created: 20021207 Date Completed: 20030508 Latest Revision: 20191210
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Update Code:
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20240104
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DOI:
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10.1054/clnu.2002.0587
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PMID:
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12468373
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Background and Aims: Critically ill patients do not always tolerate nasogastric tube feeding. Gastric residual volumes are widely used to evaluate feeding tolerance, but controversy exists about what constitutes the residual volume (diet formula or digestive juice). In this paper, we describe the use of the refractometer as a tool to monitor dietary formula concentration in gastric juice and evaluate gastric juice refractometry as a possible clinical application.
Methods: Brix value (an index of the total solutes in solution) readings for polymeric diet at pH 1, 4, 7 and 8, and at 4 degrees C, 25 degrees C and 37 degrees C, and in fasting gastric juice were determined with a refractometer.
Results: We found that distilled water, minerals, and vitamins had low Brix values of 0+/-0, 1.2+/-0.1, and 0.4+/-0.1, respectively. On the other hand, because carbohydrate (17 g/100 ml), protein (5.3 g/100 ml), fat (4.1 g/100 ml), and full-strength polymeric diet had high concentrations of dissolved nutrients, they also had high Brix values (12.1+/-0.6, 6.5+/-0.1, 6.0+/-0.1, and 23.5+/-0.1, respectively). The Brix values of polymeric diet had a linear additive relationship with the diet formula concentration at various pHs, temperatures, and in the gastric juice.
Conclusion: Brix value measurement can be used to monitor stomach dietary formula concentration. Such information can be obtained at the bedside and used to evaluate feeding-intolerant patients receiving enteral feeding.
Comment in: Clin Nutr. 2003 Aug;22(4):427; author reply 427-8. (PMID: 14524332)
