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Portable respiratory monitor
Medtronic capnostream™ 35
The full-blooded realization of a product

Some projects are fast and furious, others take up a lot of time and attention (for the record, we prefer the second kind). Medtronic Capnostream™ 35 was one of these projects — and preoccupied us for a little bit over a year. It is a portable respiratory monitor that measures CO2, SpO2, respiration rate and pulse rate, which are critical for receiving real-time risk alerts, especially when a person is unconscious. This device gets reliable access to a patient’s respiratory status in virtually any clinical setting, from general care floor to ambulance and airborne. The biggest challenge of the project was not to get lost in a constant aligning with the client on every single detail (and a medical device usually has a lot of them) — and create a design that is more than just a sum of the details but a full-blooded realization of the product.

Medtronic capnostream35 portable respiratory monitor
The value of a solid design methodology

The initial research stage isn’t always about consumers; often the goal is to create a full list of requirements affecting the future design. In our case, it was a long list: How well is it sealed? What is the size and amount of connectors? How many of them are always connected and which are connected only sometimes? And so forth. We also studied use cases and, of course, numerous medical regulations. The next step, the framing stage, kicked off with the client giving us a box of hardware components. To organize them in space, we created 3D models of different configurations («tablet», «cube», «tower» and «beam») and analyzed them using various criteria: portability, stability, assembly, heat transfer and more. The idea was to enable comparison of different parameters that are critical for the product. It’s a purely analytical process: no room for opinions, just a naked math that helped us choose the best configuration. We always freeze a configuration first and only then start designing and zooming in on details. That makes our concepts stable enough to last and accommodate changes during the process while maintaining the original visual identity.

Medtronic capnostream35 portable respiratory monitor
The power of an elaborated design process

Further, we studied the design DNA of the company by researching Medtronic products, especially the other monitor — in order to create a logical visual transition between two devices. We developed three design concepts to choose from. It’s always nice to involve clients in the process and give them options to pick from. After the choice was made, we went into the long process of engineering and pre-SVR — far less exciting but the most important part of the project. During that stage all kinds of things happened, our electronic engineer fell from a ladder, broke both hands and had to take a leave for two months (he is OK now). But thanks to our elaborate design process, we went through all that complex engineering without getting into corners and eventually created a masterpiece of a medical device. Overall, it was a good year.

Medtronic capnostream35 portable respiratory monitor
Medtronic capnostream™ 35
  • The full-blooded realization of a product
  • The value of a solid design methodology
  • The power of an elaborated design process