The oral glucose tolerance test is administered using premixed beverages with a standard concentration of glucose.
Volume: 10 ounces (296 mL)
|
Glucose Concentration |
Total Glucose Load |
Purpose |
|
5 grams per ounce |
50 grams per bottle |
screening a pregnant woman |
|
7.5 grams per ounce |
75 grams per bottle |
nonpregnant adult or pediatric patient |
|
10 grams per ounce |
100 grams per bottle |
diagnosing a pregnant woman |
The dose for the nonpregnant patient is
glucose load in grams =
= MIN(75, (body weight in kilograms) * 1.75)
The equation is needed for body weights up to 42.8 kg after which the 75 kilogram is given.
The beverage comes in different flavors (orange, cola, lemon lime) but can be difficult to swallow. Keeping the beverage well-chilled can make it more palatable.
Ideally supplies of each type of glucose beverage should be available. However, sometimes it is necessary to make do with what is available.
|
Beverage |
50 gram dose |
75 gram dose |
100 gram dose |
|
5 g per oz |
10 ounces |
15 ounces |
20 ounces |
|
7.5 g per oz |
6.67 ounces |
10 ounces |
13.3 ounces |
|
10 g per oz |
5 ounces |
7.5 ounces |
10 ounces |
where:
• Giving 20 ounces of a 5 gram per ounce solution would be too much for many pregnant patients to swallow.
Purpose: To dose a glucose containing beverage for an oral glucose tolerance test.
Specialty: Endocrinology, Clinical Laboratory
Objective: dosage adjustments
ICD-10: R73.0,
