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CGM Series | The Glucose Never Lies® Podcast
Three of the UK's leading diabetes specialist nurses on why CE marking is not a quality standard for CGM accuracy, why data sufficiency must come before device comparison, and what ATTD 2025 revealed about where diabetes technology is heading. A frank, clinical conversation grounded in years of front-line practice — and the story of how the DSN Forum's five-point accuracy scoring system was built.
In this episode:
- Why the DSN Forum created its CGM comparison chart and how it has evolved
- Why CE marking is not a quality standard for CGM accuracy
- How the five-point accuracy scoring system works and what it requires from a device
- Why only four devices currently meet the data sufficiency standard
- What 20/20 and 40/40 agreement rates mean in real clinical terms
- Why everyone using CGM for insulin decisions still needs a working finger-prick meter
- The calibration debate: does the option to calibrate add safety or risk?
- What ATTD 2025 revealed about fully closed loop systems — and who may not benefit
- The case for GLP-1 in type 1 diabetes and why priority access matters
- Abbott's continuous ketone monitor: opportunity, unknowns, and risks
- AID system optimisation, insulin on board, and the GNL AID System Explorer
Chapters:
- 00:00 — Introduction: meeting Amanda, Beth and Tamsin
- 02:14 — Why the DSN Forum CGM comparison chart was created
- 06:47 — Turning complex CGM evidence into a practical scoring system
- 16:23 — How CGM choice works in real clinical settings
- 20:36 — Why finger-prick testing still matters — and the calibration debate
- 29:26 — What stood out at ATTD 2025
- 44:03 — AID systems, insulin on board, and the GNL AID optimiser
- 49:49 — Where to find the DSN Forum, the chart, and closing thoughts
Guests: Amanda Williams (Lead Diabetes Nurse, East Kent), Beth Kelly (Clinical Lead DSN, Wiltshire), Tamsin Fletcher-Salt (Lead DSN, University Hospital North Midlands). All core members of the Diabetes Specialist Nurse Forum UK.
Links:
- Full show notes: https://theglucoseneverlies.com/episode-36-cgm-accuracy-dsn-forum/
- DSN Forum CGM Comparison Chart: https://www.diabetesspecialistnurseforumuk.co.uk/new-cgm-comparison-chart
- CGM Guide Part 2 — Assessing CGM Accuracy: https://theglucoseneverlies.com/assessing-cgm-accuracy-performance/
- GNL AID System Explorer: https://theglucoseneverlies.com/aid-system-explorer/
- Episode 35 — Professor Othmar Moser on CGM Study Design: https://theglucoseneverlies.com/episode-35-cgm-series-the-importance-of-cgm-accuracy-and-study-design-with-professor-othmar-moser/
Educational purposes only. Not medical advice. Always work with your diabetes care team.
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The Glucose Never Lies® is a registered trademark of The GNL Ltd. Company No. 16733595. UK VAT No. GB 516 3272 08.
Independent by design. The Glucose Never Lies® takes no sponsorship and no advertising. We run on education grants and listener donations. If this helped, buy the GNL a coffee (buymeacoffee.com/gnlfree).
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Contact: collaboration, john@theglucoseneverlies.com; creatives, anj@theglucoseneverlies.com
For education only. Not medical advice and not a substitute for individual care; decisions about your care sit with you and your diabetes team.
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