What a "Hi" Reading on a Contour Next Glucometer Means
A "Hi" reading on a Contour Next blood glucose monitoring system indicates that your blood glucose level is extremely high, exceeding the upper measurement limit of the device (likely above 600 mg/dL or 33.3 mmol/L), and requires immediate medical attention. 1
Clinical Significance and Immediate Action
- A "Hi" reading represents a hyperosmolar hyperglycemic state that requires emergency assessment and management at a hospital 1
- This extreme hyperglycemia poses significant risks for diabetic ketoacidosis (if ketones are also elevated) or hyperosmolar hyperglycemic state, both of which are medical emergencies 1
- Patients with blood glucose persistently above 20 mmol/L (360 mg/dL) or reading "HI" should be referred directly to the hospital for emergency care 1
Technical Aspects of "Hi" Readings
- The Contour Next system has a specific upper measurement limit, beyond which it cannot provide a numerical value and displays "Hi" instead 2, 3
- Unlike some numerical readings that may have slight variations in accuracy, a "Hi" reading consistently indicates a dangerous level of hyperglycemia that exceeds the meter's measurement capability 3
- The accuracy of Contour Next is generally high within its measurement range, but cannot quantify glucose levels beyond its upper limit 4, 3
Verification Steps
- If you receive a "Hi" reading, consider the following steps while seeking medical attention:
- Check for potential meter errors by ensuring the test strip was properly inserted and sufficient blood was applied 2
- If possible, repeat the test with a new strip to confirm the reading 2, 5
- The Contour Next system has a Second-Chance sampling feature that allows reapplication of blood if the initial sample was insufficient, which helps prevent false readings 2
Risk Factors and Common Causes
- Missed insulin doses or inadequate insulin therapy 1
- Acute illness or infection that increases insulin resistance 1
- Medication effects, particularly high-dose steroids 1, 6
- Severe insulin deficiency, as seen in undiagnosed or poorly controlled diabetes 1
Important Considerations
- Do not wait for symptoms to worsen before seeking care - a "Hi" reading alone warrants immediate medical attention 1
- While awaiting medical care, avoid eating carbohydrates and drink water if able (unless instructed otherwise by healthcare providers) 1
- If you have ketone testing supplies, check for ketones, as their presence with extreme hyperglycemia increases the urgency for medical intervention 1
Remember that blood glucose meters have limitations in their measurement ranges, and a "Hi" reading should never be ignored as it indicates a potentially life-threatening condition requiring prompt medical care 1.