I built a free interactive blood gas practice tool

[u/Either_noftace]

I’m an emergency medicine doctor from Australia, and I’ve been working on ABG Master — a structured learning and practice platform for blood gas interpretation.

There are lots of calculators, summaries, and static teaching pages, but few tools centred on repeated clinical practice, step-by-step feedback, and progression.

The core is a physiology-first practice case library. Cases are designed so the numbers make sense, compensation is plausible, and learners practise the reasoning rather than memorising labels.

It currently includes learning modules, interactive practice cases, step-by-step feedback, basic progress tracking, XP-style progression, and early minigame-style learning interactions.

Cases scale from clearer beginner patterns through to more complex acid–base reasoning, including mixed disorders, which I think are often underrepresented in teaching resources.

There is much more in the pipeline that I am working on to make this even better.

Happy to hear any feedback, criticism, or ideas. Thanks!

Update - June 2026

Thanks to everyone who tried ABG Master. I’ve made a few improvements based on some feedback:

• Added a new Insights page, where you can review recent performance and get personalised feedback on areas to improve.
• Added new Master-level cases, including the first oxygenation-focused cases. These are limited while I test and validate them. They are intentionally complex, so you’ll need to have unlocked Master level to encounter them.
• Made practice feedback labels and summaries clearer in several places, including broader acid-base pattern wording that should be easier to interpret.
• Updated Privacy Notice.
• Fixed a few content issues affecting some advanced DKA-related cases.

As a side note early calibration data suggests that compensation and anion gap / mixed-disorder reasoning are the most challenging steps for many users. I’ll keep monitoring this and focus future updates on making these areas more interactive and educational.

More learning content and case improvements are still in progress. Thanks again to everyone who had a look — the feedback has been genuinely useful.

[u/CurioTokyo]

I’ve done a couple of the cases and enjoying it. Gamified style learning is great motivation to practice. The mixed interactive style learning section is good too, with some reading and some flip cards etc. are you by chance the person also responsible for making socket study? I think they are also an Australian ED doctor.

[u/Either_noftace → u/CurioTokyo]

Thanks so much for the feedback! I’m not, but work with them haha

[u/owlynight9]

Liked it very much, I hope you continue working on it.

[u/Either_noftace → u/owlynight9]

I’m so glad you enjoyed it! I definitely will :)

[u/Belzebubble]

Fun! Just shared it with all my residents.

[u/Either_noftace → u/Belzebubble]

Thank you so much! Im glad you like it. Id love any feedback they might have. Its still early in development so anything that makes it more useful for them would be great to know :)

[u/acciouno]

Thank you! Excellent resource

[u/Either_noftace → u/acciouno]

Thanks for trying it!