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The role of urine sugar in diabetic management
Insights
Urine sugar levels correlate with blood glucose in children with diabetes, but are not precise enough for frequent insulin adjustments. The "sliding scale" method for insulin dosing based on urine sugar is not recommended.
Area of Science:
- Pediatric Endocrinology
- Clinical Chemistry
- Diabetes Management
Background:
- Urine reducing sugar concentration is a common metric for managing pediatric diabetes.
- The
- sliding scale
- protocol uses urine sugar to guide supplemental insulin doses.
- This practice assumes urine sugar accurately reflects plasma glucose levels.
Purpose of the Study:
- To evaluate the accuracy of urine sugar concentration as an indicator of plasma glucose concentration in children with diabetes.
- To determine if urine sugar levels can reliably guide insulin adjustments using the
- sliding scale
- method.
Main Methods:
- Compared urine sugar concentrations (first and second voided samples) with concurrent plasma glucose concentrations.
- Analyzed data from 220 children with diabetes.
- Calculated correlation coefficients and standard deviations.
Main Results:
- A good correlation (r = .92) was observed between urine sugar and plasma glucose for both first and second voided samples.
- However, a large standard deviation indicated significant variability in plasma glucose at any given urine sugar concentration.
- Urine sugar provides a general indication of plasma glucose but lacks precision for individual measurements.
Conclusions:
- While urine sugar concentration is useful for general diabetes management, its variability limits its accuracy for precise glucose monitoring.
- The
- sliding scale
- protocol, relying on urine sugar for frequent insulin adjustments, poses significant risks and should be discontinued in pediatric diabetes treatment.
Abstract:
The concentration of reducing sugar in the urine is commonly used in the management of diabetes in children. Supplemental doses of regular insulin are administered in response to the concentration of urine sugar according to a protocol termed the "sliding scale." This practice assumes that the concentration of sugar in urine is a good indicator of the plasma glucose concentration. This assumption was tested by comparing urine sugar concentrations in first and second voided urines with the plasma glucose concentrations in 220 children with diabetes. The correlation was good (r = .92) for both the first and second voided urine specimens. Thus, urine sugar concentrations in general define the level of plasma glucose. The large standard deviation of the plasma glucose at each concentration of urine sugar, however, limits the usefulness of urine sugar as an accurate reflection of the coincident plasma glucose concentration. The urine sugar concentration, although useful for the general management of diabetes, provides significant risk when used to guide frequent adjustments in insulin administration. Therefore, the "sliding scale" should not be used in the treatment of children with diabetes.