What test is considered the most accurate in evaluating the effectiveness of diet and insulin therapy over time in a 13-year-old with type 1 diabetes?

What test is considered the most accurate in evaluating the effectiveness of diet and insulin therapy over time in a 13-year-old with type 1 diabetes?

• A. Blood pH
• B. Serum protein level
• C. Serum glucose level
• D. Glycosylated hemoglobin

Answer: (D)

The most accurate way to judge how well diet and insulin therapy are working over time in a teenager with type 1 diabetes is the glycosylated hemoglobin test. It reflects the average blood glucose level over roughly the past two to three months because glucose attaches to hemoglobin in red blood cells as they circulate. Since red blood cells live about four months, HbA1c provides a take-home measure of long-term control, smoothing out day-to-day fluctuations from meals, exercise, or illness. In contrast, a single blood glucose reading only shows the current moment, which can vary widely; blood pH assesses acid-base status and is more about acute complications like ketoacidosis; and serum protein levels are not indicators of glycemic control. So HbA1c gives the best overall picture of how effectively the regimen is managing diabetes over time.

The most accurate way to judge how well diet and insulin therapy are working over time in a teenager with type 1 diabetes is the glycosylated hemoglobin test. It reflects the average blood glucose level over roughly the past two to three months because glucose attaches to hemoglobin in red blood cells as they circulate. Since red blood cells live about four months, HbA1c provides a take-home measure of long-term control, smoothing out day-to-day fluctuations from meals, exercise, or illness. In contrast, a single blood glucose reading only shows the current moment, which can vary widely; blood pH assesses acid-base status and is more about acute complications like ketoacidosis; and serum protein levels are not indicators of glycemic control. So HbA1c gives the best overall picture of how effectively the regimen is managing diabetes over time.