Patterns and Glycaemic Endpoints for Diagnosing Gestational Diabetes
Gestational diabetes is when pregnant women develop high blood sugar, which can affect both mum and baby. This study is exploring a new way to diagnose it, as current tests can sometimes be unreliable. We're looking at a small, stick-on sensor (called a continuous glucose monitor or CGM) that tracks blood sugar levels all the time. Researchers will compare blood sugar patterns from this sensor in 400 pregnant women, some with gestational diabetes and some at high risk of developing it. The idea is to see if this sensor could offer a better or additional way to diagnose the condition, helping more women get accurate results and the right care faster.
At a glance
What is this study about?
When you're pregnant, sometimes your body has trouble controlling blood sugar levels, leading to a condition called gestational diabetes. This can cause problems for both you and your baby during pregnancy and delivery. While it usually goes away after the baby is born, it's important to find and manage it quickly.
Currently, the main way to diagnose gestational diabetes in the UK is with a blood test called an oral glucose tolerance test (OGTT). This involves having your blood sugar checked before and after drinking a sugary drink. However, this test isn't always perfect; it might miss some women who have gestational diabetes, or mistakenly tell others they have it when they don't. This can lead to worries or unnecessary medical procedures, and could mean some women don't get the treatment they need.
This study is looking at a new piece of technology – a small sensor called a continuous glucose monitor (CGM) – that sticks to your arm and constantly checks your blood sugar levels. These sensors are already used to help people with diabetes manage their condition. Researchers want to see if using this sensor could give a more accurate and helpful way to diagnose gestational diabetes. They will compare the detailed blood sugar information from the sensor with the results of the usual sugar drink test and how the pregnancy progresses, to see if the sensor can give a better overall picture of blood sugar patterns.
Key takeaways
- This study is looking for better ways to diagnose gestational diabetes.
- It uses a small, stick-on sensor to track blood sugar constantly.
- Participation could help improve diagnosis for future pregnant women.
- You won't see your direct sensor readings during the study.
- Your usual antenatal care will not change.
- The study aims to collect data to see if the existing test is always accurate.
Who may be eligible?
You might be able to join this study if you are female, aged 18 or older, and are between 12 and 26 weeks pregnant. You will also need to have at least one risk factor for gestational diabetes, as identified by current health guidelines, and be generally suitable for the standard care pathway for gestational diabetes.
However, you won't be able to take part if you already had diabetes before pregnancy, or if you had gestational diabetes in a previous pregnancy. If you have an allergy to the adhesive on the sensor, or if you plan to move away from the study area during the research period, you also won't be eligible. Lastly, if you're taking part in another study that could affect your blood sugar levels, this study might not be right for you.
Could this study suit you?
Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.
- Are you 18 years old or older?
- Are you between 12 and 26 weeks pregnant?
- Do you have a risk factor for gestational diabetes?
- Have you had diabetes before this pregnancy (Type 1 or Type 2)?
- Have you had gestational diabetes in a previous pregnancy?
What does participation involve?
If you decide to take part, you'll be one of 400 pregnant women in the study. You will receive a small, stick-on sensor (a continuous glucose monitor) to wear, which will quietly track your blood sugar levels. This device will be 'blinded', meaning you won't see your blood sugar readings directly during the study period. Your blood sugar data from the sensor will then be compared with the results from your usual sugar drink test (OGTT).
Researchers will also look at your initial risk factors for gestational diabetes, how your pregnancy progresses, and whether you need any treatment for gestational diabetes. A smaller group of 60 participants will be chosen later to look more closely at how blood sugar levels change over time. The study will not involve any extra visits to the clinic apart from your usual antenatal appointments.
Potential risks and benefits
Locations (1)
- Portsmouth Hospitals University NHS TrustVerified postcodePortsmouth, United Kingdom
Common questions
What is gestational diabetes?
It's a type of diabetes that develops during pregnancy, causing high blood sugar levels. It usually goes away after the baby is born.
What is a continuous glucose monitor (CGM)?
It's a small sensor worn on the arm that constantly measures and records your blood sugar levels without needing finger pricks.
Will I see my blood sugar readings during the study?
No, the sensor will be 'blinded', so you won't see your results in real-time. Researchers will analyse the data later.
Will this study change my usual pregnancy care?
No, you will continue to receive your standard care for gestational diabetes as recommended by your doctor.
Is the sensor safe to use during pregnancy?
Yes, CGM devices are widely used and considered safe. The main potential issue is a mild skin reaction to the adhesive.
How to find out more
Always speak to your GP or specialist before deciding to take part in a study.
Discussion
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