Bringing Simplicity to Insulin Pumping: The Making of Tandem's T: Slim

Curated by Claudia Shannon / Research Scientist / ishonest

Ever look at a diabetes product and wonder what the heck the developers were THINKING? People have to live with this stuff, after all! It’s even more interesting when they occasionally get it right… Today, Kim Blickenstaff, CEO of Tandem Diabetes Care, offers an inside view of how Tandem “got its groove on” to create the t: slim, launched in Summer 2012 as the first-ever insulin pump that looks and feels like a slick consumer smartphone.

“How do you bring simplicity to something as complex as insulin pumping? By listening.'”

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No.213 - Repair Elasticity Damage

— Kim Blickenstaff of Tandem, on creating the t: slim

A Guest Post by Kim Blickenstaff, CEO of Tandem Diabetes Care

Diabetes does not run in my family. Growing up, I don’t recall any of my classmates having type 1 diabetes and I had certainly never seen an insulin pump prior to joining Tandem Diabetes Care. This is all a new world for me.

As I began to read the literature and talk to folks like John Walsh — whose book Pumping Insulin was required reading here — the only thing I could make out of it all was pumping insulin is hard work. Even with my limited experience at that time, I had already started to answer my own question of “Why do two-thirds of people with type 1 still rely on syringes for diabetes management?”

So we started talking to people. Many of you with whom we spoke may be reading this right now. The answers I heard were…”because it’s easier to use a syringe or a pen”….”there is so much to remember and do already that a pump complicates life even more”…. and, “even though better control can be achieved, a pump doesn’t seem worth the hassle.” We also heard that even people using pumps have a love-hate relationship with them. They love the benefits of pumping but hate the pump itself.

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So we kept asking, and over the past five years have spoken with more than 5,000 people to help us get smarter. You told us pumps were hard to learn, hard to use, and looked like hospital equipment. You asked us to make your next pump cool to look at and simple to use. You took the time to share with us a ton of great ideas. Thank you.

Simplicity. How do you bring simplicity to something as complex as pumping?

The second most important thing in making these devices simpler to operate was an intuitive user interface. One thing we knew about simplicity was that what might be simple for one of our software engineers who went to MIT, is not simple for me and may not be simple for you. Thankfully, with the emergence of all our digital media, “Human Factors Science” has developed to a sophisticated level, resulting in devices that are incredibly intuitive. We all know a good interface design when we use one. ATMs are a good example. We can get our money out without a user’s manual. It feels simple and intuitive and we don’t feel frustrated or make errors. That is a good design.

There is a simple rule in the world of Human Factors Science — five interactions with a real user will point out 95% of all design flaws in an interface. By repetitive testing, you can design out the flaws that cause fumbling, stumbling, frustration and fear, and make what was a complex interface simple and intuitive.

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The t: slim insulin pump was designed through this process. This is an early design concept:

Our goal was to design its interface so that anyone can use all of its features without referencing a user’s manual. The architecture of the t: slim interface is what is referred to as “hub and spoke” — the home screen is the “hub,” and the “spokes” are all the other functions stemming from it that are just a touch away, rather than layers deep. It’s simple to get to the “spokes” like the Bolus Function or Insulin on Board. It’s simple to get back to the Home Screen with one touch of our “T” logo.

All the information and settings are arranged logically, to help people better understand their settings and feel in control. Advanced options like multiple basal profiles are easy to find, name and set up. All entries that affect dosing are presented one last time on a confirmation screen to help eliminate potential errors. And it’s one touch back to the Home Screen when you’re done.

Our first customers are telling us that we have achieved our goals. Our touch screen simplifies things dramatically, and displays more critical information at a glance. A third of our users are having their first experience with a pump, and they love it. Many users can figure out how to use it without a user manual. Everyone loves how it looks, its slimness, and its design.

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I think sometimes it’s better to come to a problem with no prior experience or preconceptions. It forces you to talk directly to people to find out what they want and not start creating based on what you think they want. The t: slim pump was designed by you, for you, and we have enjoyed being part of that process. And you are continuing to help us innovate as we work to integrate the Dexcom CGM into our pump.

For everyone who has helped us over the last five years and who has given us hours of your time in testing, and hundreds of suggestions for improvement and changes, we are very grateful. We look forward to working more with the diabetes community to continue pushing the boundaries of innovation in diabetes technology. Working in Tandem with you, we listened.

Thanks to Kim & staff at Tandem for taking a consumer’s viewpoint on a medical device, for a change!

This content is created for Diabetes Mine, a leading consumer health blog focused on the diabetes community that joined ishonest Media in 2015. The Diabetes Mine team is made up of informed patient advocates who are also trained journalists. We focus on providing content that informs and inspires people affected by diabetes.

Read more on: diabetesmine

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