Helping The War Effort With 3D Printed Tourniquets

It’s a sad statement on the modern world that even civilians are at risk for severe traumatic injuries in the course of going about their lives. And if something unthinkable happens to you or someone you love, here’s hoping both that the injury can be treated, and that someone is nearby who both knows what to do and is properly equipped to do it.

That’s the thinking behind these 3D printed tourniquets, an unfortunate but necessary response to the ongoing war in Ukraine. To get tourniquets into the hands of those trained to use them, [3DPrintingforUkraine] is working on plans for a printable version of the C-A-T, or combat application tourniquet, a lightweight but strong tourniquet that can be rapidly applied, even by victims themselves. The commercial device consists of molded nylon buckles and hook-and-loop fastener bands, along with a very sturdy plastic handle that serves as a windlass that provides the necessary occlusive force when twisted. The 3D printed version’s parts aren’t as streamlined as the commercial unit’s, but they appear to be strong enough to withstand the considerable forces involved. From the look of their site, STL files and instructions for assembly will be available soon.

To be clear, tourniquets should only be applied by someone properly trained to do so. But having ample tourniquets available where traumatic injuries to the extremities are likely to occur can only improve the odds that one will be available when it’s needed. So hats off to [3DPrintingforUkraine] for making the effort to push this forward.

[Austin Everman] sent us this tip. Thanks!

3D Printed Tourniquets Are Not A Cinch

Saying that something is a cinch is a way of saying that it is easy. Modeling a thin handle with a hole through the middle seems like it would be a simple task accomplishable in a single afternoon and that includes the time to print a copy or two. We are here to tell you that is only the first task when making tourniquets for gunshot victims. Content warning: there are real pictures of severe trauma. Below, is a video of a training session with the tourniquets in Hayat Center in Gaza and has a simulated wound on a mannequin.

On the first pass, many things are done correctly: the handle is the correct length and diameter, the strap hole fit the strap, and the part is well oriented on the platen. As with many first iterations, it looks good on a screen, but in the real world, we all live under Murphy’s law. In practice, some of the strap holes had sharp edges that cut into the strap, and one of the printed buckles broke unexpectedly.

On the whole, the low cost and availability of the open-source tourniquets outweigh the danger of operating without them. Open-source medical devices are not just for use in the field, they can help with training too. This tourniquet is saving people and proving that modeling skills can be a big help in the real world.
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