Blood Glucose Monitoring

Blood Glucose Monitoring

Blood glucose monitoring is an essential part of managing diabetes. Traditional meters use blood to measure glucose levels, whereas continuous glucose monitoring (CGM) measures glucose in the interstitial fluid around your body’s cells, providing a continuous stream of readings.

Continuous Glucose Monitoring

CGM systems are less invasive than frequent finger-prick testing and can provide up to 288 glucose readings per day. They work 24 hours a day and may include alarms to alert you when glucose levels are too high or too low. CGM can be used by people on insulin pumps or injections.

Funding Options

In the UK, the most common way to obtain an insulin pump or CGM system is through NHS funding. Eligibility depends on guidelines and clinical need. NICE guidelines recommend CGM for adults and children struggling with hypoglycaemia or impaired hypo awareness.

How CGM Helps Diabetes Control

By providing hundreds of readings a day, CGM offers a detailed picture of glucose control. It can detect highs and lows even during sleep and, combined with food and activity logs, allows patients and healthcare teams to adjust diet, insulin dosage, and lifestyle.

Accuracy Considerations

Glucose levels in interstitial fluid react slightly slower than in blood, typically showing a lag of around 10 minutes. Users should continue standard blood glucose tests to verify accuracy before making treatment changes.

CGM in Pregnancy

Continuous glucose monitoring is increasingly used in gestational diabetes. Maintaining good glucose control during pregnancy is important for the health and development of the baby.

Summary

Continuous glucose monitoring provides a comprehensive view of blood sugar patterns, helps detect highs and lows more accurately than standard testing alone, and supports improved diabetes management for people using insulin therapy.