According to Australian guidelines, how should hyperglycemia be managed in a 17‑year‑old with type 1 diabetes?

Management of Hyperglycemia in a 17-Year-Old with Type 1 Diabetes

For hyperglycemia management in a 17-year-old with type 1 diabetes, optimize insulin dosing through carbohydrate counting and adjust for meal composition, while ensuring the elevated glucose is not due to insulin deficiency that could worsen with activity.

Immediate Assessment of Hyperglycemia

When encountering hyperglycemia in this adolescent, first determine if it represents insulin deficiency versus other causes:

• Check for ketones (urine or β-hydroxybutyrate) to rule out insulin deficiency
• Postpone intense physical activity if glucose ≥350 mg/dL (19.4 mmol/L) with moderate to large urine ketones, or β-hydroxybutyrate >1.5 mmol/L 1
• Exercise caution when β-hydroxybutyrate levels are ≥0.6 mmol/L 1

This is critical because hyperglycemia from insulin deficiency will worsen with exercise and increase ketosis risk, whereas hyperglycemia from other causes can be managed differently.

Insulin Adjustment Strategy

Carbohydrate Management

Implement carbohydrate counting as the foundation of insulin dosing, prioritizing consistency over perfect accuracy 2:

• Variations of up to 10-15g or 15% of carbohydrate amount are unlikely to cause significant hypo- or hyperglycemia 1
• For adolescents lacking numeracy skills, experience-based estimation matching insulin to carbohydrate intake is acceptable 1

Meal Composition Adjustments

Adjust insulin delivery for high-fat and high-protein meals, which delay glucose rises 2:

• Use square-wave or dual-wave bolus doses on insulin pumps 1
• Split bolus doses if using injections 1
• Educate on how protein, fat, and complex carbohydrates delay postprandial glucose excursions 2

Nutrition Optimization

Emphasize an eating pattern with nonstarchy vegetables, whole fruits, legumes, fish, lean protein, whole grains, and low-fat dairy 2:

• Minimize red meat, sugar-sweetened beverages, sweets, refined grains, and processed foods 2
• Focus on foods higher in fiber and lower in glycemic load 1
• Limit saturated fats 1

Physical Activity Considerations

For this 17-year-old, target 60 minutes of moderate- to vigorous-intensity aerobic activity daily, with muscle-strengthening and bone-strengthening activities at least 3 days per week 2, 1.

Pre-Exercise Management

• Ensure blood glucose is 90-250 mg/dL (5.0-13.9 mmol/L) before starting exercise 1
• Have accessible rapid-acting carbohydrates available 1

Insulin Adjustments for Exercise

• Reduce prandial insulin for the meal/snack before exercise 1
• For pump users: lower basal rates by 10-50% or suspend for 1-2 hours during exercise 1
• Decrease basal rates or long-acting insulin by 20% after exercise to reduce delayed exercise-induced hypoglycemia 1

Monitoring Requirements

Perform frequent glucose monitoring before, during, and after exercise 2, 1:

• Use continuous glucose monitoring (CGM) when available
• Monitor particularly for delayed hypoglycemia overnight following exercise
• Consider bedtime snacks after exercise days 1

Multidisciplinary Support

Ensure access to an interprofessional team including 2:

• Pediatric diabetologist
• Registered dietitian nutritionist for comprehensive nutrition education at least annually
• Diabetes educator for ongoing self-management education
• Mental health professional experienced in childhood diabetes

Psychosocial Screening

At age 17, screen for diabetes-related distress and disordered eating behaviors 1:

• Use validated screening measures when hyperglycemia or weight loss is unexplained
• Review medication regimen for treatment-related effects on hunger/caloric intake 1

Family Involvement

Maintain developmentally appropriate family involvement in diabetes management tasks 1:

• Premature transfer of diabetes care to the adolescent may result in poor self-management and deteriorating glycemic control 1
• Offer the adolescent time alone with providers while keeping parents engaged in overall care 1

Common Pitfalls

• Failing to check ketones before attributing hyperglycemia to dietary indiscretion or missed insulin
• Allowing premature independence in diabetes management without adequate support structures
• Neglecting meal composition when calculating insulin doses (focusing only on carbohydrates while ignoring fat and protein content)
• Not adjusting insulin for physical activity, leading to either hyperglycemia or delayed hypoglycemia
• Missing psychosocial screening, particularly important given that only 37.9% of Australian children with suboptimal glycemic control are screened for psychological disorders 3