Technology blogger and Type 1 diabetic Scott Hanselman works for Microsoft, and is quite famous in software developer circles.  As it happens, he's been wearing the brand new "Revel" combo Insulin Pump and Continuous Glucose Monitor (CGM) system from Medtronic for six days now, and has just posted his thoughts on his tech blog, Computer Zen.  He's also kindly agreed to allow me to publish simultaneously here at the 'Mine.



A Review of the Paradigm "Revel" by Scott Hanselman

Beginners and non-diabetics: Start by reading Scott's intro to the basics of pumping and CGM systems here.

The Paradigm series of pumps are an Insulin Pump, but also a CGM receiver. They talk wirelessly to the CGM transmitter (see the picture above that is not my stomach) as well as wirelessly to a finger stick blood sugar meter. It's all one integrated thing.

To review, insulin pumps are not automatic. They don't deliver without me saying so. While the pump talks wirelessly to meters and CGMs and stores values in memory, it doesn't act on them. There is no "closed loop" system. The delays involved are too great. However, the new "Revel" pump does add a number of cool new features that are making my life easier already. I think it's a great upgrade and if you have a MiniMed pump you should try to upgrade with their "Pathway Program." It's worth it.

New Features

Better charts. Previously the charts were either 3 hours or 24 hours. Far to zoomed in, or so far out as to be useless. Now you can zoom 3, 6, 12, 24. Here's some screenshots:

It was amazing how this apparently small upgrade changes the experience with the pump. The 6-hour view is a dream.

Predictive Alerts

This is the killer feature that has already helped me at least twice a day in the last week. The new Revel has a "rate of change" detection algorithm that is totally user-settable. If the pump decides that you will hit a high blood sugar if your current rate of change goes unchecked, it'll let you know via an alarm. This is the one feature I always needed and it works just as you'd wish it did.

This feature did initially cause me to stack insulin a bit and caused a few lows as I was acting extra aggressively to squash highs, but I am finding I'm getting used to it. I wish it hadn't taken 5 years to get it. That's the tragedy of medical devices. You're thrilled with your multi-touch color screen portable device and I'm happy if I get one firmware update every 5 years. The difference is, my phone crashed twice today. This pump has never crashed in 10 years. We sacrifice innovation for stability.

Subtle but Important Improvements

One of the most important numbers for a pumper is the amount of insulin that's "pending" or "active." Most insulin takes about 3-4 hours to get out of my system, so if I take 5 units now, and 5 more units in an hour, that's stacking doses. If I remembered or was told that I had ~5 units active, I might not have taken that second dose and could avoid a nasty low. The Revel automatically calculates the active insulin and shows you it in three new places. First, on the status screen, second in the manual bolus (dose) screen, and again on the Bolus Wizard. It was buried in the UI before, now it's front and center.

The motor is more precise now, letting you do basal rates as low as 0.025 units per hour, crucial for young people.


This upgrade, the Revel, makes a great pump better. It was totally worth the $399 Pathway upgrade. If you're on a Minimed pump, get the upgrade. If you're not on a pump, consider getting one, it'll change your life.



Dear Readers,

If you enjoyed this review:


Scott has raised almost $20,000 already this year, and is aiming for $50K. Go, techie type 1 guy!!




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