Service
Continuous glucose monitoring
Continuous glucose monitoring (CGM, also written CGMS) at Diabetes Care Centre in Brooklyn, Pretoria. Contact the practice about available arrangements.
What continuous glucose monitoring is
Continuous glucose monitoring (CGM) uses a small sensor, usually worn on the skin, to measure glucose levels in the fluid under the skin throughout the day and night, rather than only at single moments. It shows a running picture of your glucose — not just a current reading, but the direction and speed in which it is moving.
On this site, “CGM” and “CGMS” refer to the same continuous glucose monitoring service. How the practice arranges CGM, and what it includes, is confirmed on enquiry.
For some people — particularly those using insulin or an insulin pump — that ongoing picture can make it easier to spot patterns and understand how daily choices, food, activity and medication affect glucose over time.
What CGM measures and displays
The information a monitor shows, in general terms.
A continuous glucose monitor shows a current glucose reading and, importantly, a trend arrow indicating whether glucose is rising, falling or steady, and how quickly. Many systems also show recent history, so you can see how glucose has moved over the past hours rather than relying on a single point in time.
Some systems can also alert the wearer when glucose crosses set thresholds — for example when it goes too high or too low. The features available depend on the device and how it is set up, which is confirmed with the practice.
Trends versus individual readings
A single reading gives a snapshot at one moment, while continuous monitoring shows the shape of your glucose over time. That shape — how often glucose rises or falls, how quickly, and how long it stays in a given range — can reveal patterns that a one-off reading cannot.
Understanding those patterns is often what makes CGM useful. Rather than reacting to a single number, a clinician can look at trends to consider how food, activity, medication and sleep relate to your glucose, and where adjustments might help. The practice can explain how monitoring information is reviewed as part of your care.
How CGM differs from finger-prick testing
The general distinction between the two approaches.
Finger-prick testing uses a drop of blood to give a glucose reading at one moment. It is accurate for that moment, but it cannot show what is happening between tests or whether glucose is moving. CGM fills that gap by measuring continuously and showing direction and rate of change.
The two are not always an either/or. Depending on the system and your situation, CGM may complement finger-prick testing rather than replace it, and some systems require finger-prick confirmation in certain circumstances. Which approach suits you is a clinical decision discussed with the practice.
Practical considerations when discussing CGM
Using a CGM involves wearing a sensor on the skin and changing it on a regular schedule. It requires some day-to-day attention — noticing alerts, understanding what the information means, and sharing it with your clinician. For some people it becomes a natural part of their routine; for others, a different approach to monitoring may suit better.
What is involved in setting up and using CGM, and whether it is the right choice for you, is part of the conversation you have with the practice. Confirm the practical details that matter to you directly.
How monitoring supports a clinical review
Monitoring provides information; a clinician interprets it.
CGM does not replace consultation. What it provides is richer information that a clinician can review with you — patterns over days or weeks rather than isolated readings — to inform decisions about your ongoing care.
How the practice reviews monitoring information, and how findings feed back into your management, is confirmed with the practice. The practice can explain how CGM fits alongside the other parts of your care.
Questions about starting or reviewing monitoring
Is CGM suitable for me?
Suitability depends on your type of diabetes, how your glucose is managed, and your comfort with using a device. It is a clinical decision made with the practice after assessment — not something this page can determine for you.
What does starting CGM for the first time involve?
The practice can talk through how monitoring is arranged, what to expect, and how a sensor is worn and changed. Confirm the setup that applies to you when you enquire.
I already use a monitor — can it be reviewed?
If you already use a monitor, the practice can review your setup with you and discuss how your readings inform ongoing care. Mention the device you use when you call.
Which devices are involved?
The practice can confirm which sensors or devices it works with on enquiry. Mention any device you already use when you call.
Does CGM replace checking with my clinician?
CGM provides information; it does not replace consultation. The practice can explain how readings are reviewed as part of your ongoing care.
Speak to the practice about glucose monitoring
An enquiry helps us understand what you need and confirm the next step. Please call us or use the contact page.