A Review of Tandem's t:slim (Continued)


Part Three: Safety

Adam's Favorites

  • 10 seconds to cancel a bolus
  • A plethora of confirmation screens, alerts, and warning messages

It's great to make a cool looking, sleekly designed insulin pump, but it's also a medical device infusing insulin. Consequently, I was glad to see a vast array of safety features built into the t:slim — confirmation screens galore, alerts when you have not completed an action for 90 seconds (e.g., you were in the middle of calculating a bolus and forgot to deliver it), red bold text to draw attention to important items, an automatic screen lock following a bolus or when the screen is tapped three times in quick succession (e.g., to prevent accidental touchscreen taps while in your pocket), and a user interface feature called "dynamic error handling" that prevents the user from selecting illogical items in real-time (e.g., you can enter 100 grams of carbs, but the pump prevents you from adding another zero for 1,000).

My favorite safety feature of the pump was the cancel/stop bolus button. After programming and confirming a bolus, the t:slim gives you approximately 10 seconds to cancel the bolus before it ever starts delivering it. On other pumps, programming and confirming a bolus initiates delivery immediately, so unless you have lightning fast fingers, cancelling the full amount of the bolus is very challenging. I found this feature of the t:slim valuable when I had second thoughts about the bolus I just gave. The cancel bolus button also appears right on the home screen as a red "X" during the 10-second grace period, so there is no need to dig into a menu and hunt around for this feature.

Part Four: The t:slim's Durability and Cost


As an outdoorsy and active person, I was initially concerned about the t:slim's durability. Tandem has told me that if a user accidentally cracks the screen, the pump will be replaced under warranty. While I can't say I did my own extensive crash tests, I know that many young attendees at the recent Children with Diabetes Friends for Life conference had "contests" to try and break the trial t:slim pumps, and it was pretty challenging for them to do so — I think in the end it took one t:slim pump thrown at another one to crack it (and it was still fully functional)! The starter kit comes with a hard plastic case that wraps around the pump for additional protection, and the t:slim touchscreen also has a pre-applied protective film. I have not worn the pump long enough to have too many accidental drops, but the durability will be on the top of my mind as I get more experience with the device.

Water Resistance

Unlike the Animas pumps and Insulet's OmniPod, the t:slim is not completely waterproof. According to the company, the t:slim has been tested in three feet of water for 30 minutes (what's known as an IPX7 rating, similar to Medtronic pumps) — essentially, it's "water resistant." However, I must confess that I've broken multiple pumps due to water damage, so this is a concern for me. The pump worked fine after I submerged it in a cup of water for ten minutes, though I will need to wear it for a longer period to fully test its durability and water resilience.

Cost and Insurance

And of course, the very, very important question is cost. Insurance companies typically pay for a new insulin pump once every four years, though this can vary. Tandem has already signed contracts with some major insurers, and is currently working with customers on a case-by-case basis to obtain insurance coverage. We understand that the t:slim has a higher list price (about $6,995) than the Medtronic Paradigm Revel (about $6,500), Animas OneTouch Ping (about $6,300), and Insulet OmniPod (only around $600 for the starter kit, although "pods" are more expensive than sets on an ongoing basis), so that is an important consideration for those who must pay co-insurance. However, Tandem has a large staff dedicated to reimbursement, so if you are interested in getting the t:slim pump, the best way to figure out your situation is to contact Tandem directly.

Closing Thoughts

I was impressed and plan to keep the t:slim assuming my insurance will help cover some of the cost (fingers crossed!), though the devil will be in the details since I changed to my current pump fairly recently. That said, I'm definitely still interested in trying the upcoming Animas Vibe (integrated with the Dexcom Gen 4 CGM), Insulet's smaller second-generation pod, and Medtronic's MiniMed 530G with low glucose suspend — as a reminder, all these devices are currently under FDA review or will be submitted to the FDA soon. Indeed, this is a great time for patients with so many innovations coming, and I had a great week trying out something so new. For more information on Tandem's t:slim, visit Tandem's website.

This article is published on dLife thanks to diaTribe (www.diaTribe.us), an independent, advertising-free e-newsletter for everyone eager to learn about the latest advances in diabetes management. diaTribe is your inside track on diabetes research and products — sign up here for your complimentary lifetime subscription!

NOTE: This information is not intended to be a replacement or substitute for consultation with a qualified medical professional or for professional advice related to diabetes or another medical condition. Please contact your physician or medical professional with any questions and concerns about your medical condition.


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Last Modified Date: June 19, 2013

All content on dLife.com is created and reviewed in compliance with our editorial policy.

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