When a glucose meter displays “HI,” it indicates a blood sugar level exceeding the meter’s maximum measurement capability. This can be an alarming sight, as it signifies severe hyperglycemia, a state of very high blood sugar. Understanding this reading is the first step toward addressing a potentially serious situation.
What a “HI” Reading Means
A “HI” reading on a glucose meter typically means the blood glucose concentration is beyond the upper limit the device can accurately measure. For many common glucose meters, this threshold is often around 600 milligrams per deciliter (mg/dL) or 33.3 millimoles per liter (mmol/L). This display is not a malfunction error. Instead, it signals an extremely elevated level of glucose in the bloodstream. A “HI” reading is distinct from a high numerical reading, such as 300 mg/dL, representing a much more severe, potentially life-threatening elevation.
Immediate Steps to Take
Upon seeing a “HI” reading, it is important to act promptly. First, check for symptoms of severe hyperglycemia, which can include excessive thirst, frequent urination, nausea, abdominal pain, confusion, or a fruity odor on the breath. These symptoms indicate significant bodily stress from high glucose levels.
Next, re-test your blood sugar to confirm the reading, ensuring accuracy. Before re-testing, wash your hands thoroughly, use a fresh test strip, and confirm the meter is functioning correctly. If the “HI” reading persists, it confirms the severity and requires immediate attention.
If you experience severe hyperglycemia symptoms, or if the “HI” reading remains after re-testing, contact your healthcare provider or seek emergency medical attention without delay. Your healthcare team can provide specific guidance on insulin adjustments or other interventions to lower your blood sugar safely. Call emergency services if you feel unwell or cannot reach your healthcare provider promptly.
Common Reasons for Extremely High Readings
Several factors can lead to an extremely high blood glucose reading, triggering a “HI” display. One common reason is insufficient insulin or other diabetes medication, such as missed doses, incorrect dosing, or issues with insulin delivery devices. When the body lacks enough insulin, glucose cannot efficiently enter cells, leading to its accumulation in the bloodstream.
Illness or infection can also significantly elevate blood sugar levels. During sickness, the body releases stress hormones that increase glucose production and reduce insulin sensitivity. Severe emotional or physical stress, such as from surgery or injury, similarly prompts the release of hormones that counteract insulin’s effects.
Certain medications, including some steroids or diuretics, can also cause blood glucose levels to rise substantially. Consuming a large amount of carbohydrates without adequate insulin coverage can overwhelm the body’s ability to manage glucose. Understanding these causes helps prevent future occurrences.
Managing High Blood Sugar Long-Term
Preventing future “HI” readings involves consistent and proactive management of blood glucose levels. Adhering to your prescribed medication regimen, including insulin or oral medications, maintains glucose control. Regular blood glucose monitoring provides insights into how your body responds to food, activity, and medication.
Adopting healthy eating habits, characterized by balanced meals and controlled carbohydrate intake, helps prevent sharp glucose spikes. Regular physical activity also improves insulin sensitivity and lowers blood sugar levels. Developing strategies for stress management can mitigate the impact of stress hormones on glucose.
Working closely with your healthcare team is crucial for long-term management. They can help adjust your treatment plan, address recurring issues, and provide education on managing your diabetes effectively. This collaborative approach helps prevent severe hyperglycemia and promotes overall well-being.