Tiny pangolin-inspired robot can stop internal bleeding

The pangolin is the world’s only mammal fully covered in scales.  Depositphotos

Scientists from the Max Planck Institute for Intelligent Systems in Stuttgart have looked to the only scaled mammal for their design, inspired by the animal’s ability to move fluidly with its layers of interlocking keratin scales and curl itself up into a ball when necessary.

Led by researcher Metin Sitti, the team designed a millirobot that’s 2 cm (0.8 in) long and 1 cm (0.4 in) wide, featuring overlapping scales that can move, roll and heat on demand. It has a soft layer of polymer studded with magnetic particles, and a hard top layer featuring overlapping ‘scales’ made of aluminum.

Fortunately, the researchers decided to ditch the claws.  Max Planck Institute

When the robot is exposed to a low-frequency magnetic field, it can be manipulated to roll up and move around by the researchers. When rolled up, the device can transport particles such as medicine to a targeted spot in the body.

Then, when exposed to a high-frequency magnetic field, it can heat to more than 70 °C (158 °F). At this temperature, it can be used to treat internal bleeds, remove tumor tissue and treat thrombosis.

A graphic on the structure that enables the unthethered robot device to be moved and heated.  Soon, R et al/(CC BY 4.0)

While it’s not the first time scientists have turned to nature for mini robotics, with developments such as this caterpillar-inspired device and one modeled on a lamprey. But what makes this one special is that untethered robotics that are made of hard elements but can still move freely are rare and hold huge promise for tricky internal therapies and procedures.

In lab tests, the pangolin-like device was able to travel across soft tissue without damaging it, and then stem the flow of blood by covering a bleed and being heated. You can see this, among other tests, in the video compiled below.

Rolling robot treats wounds and targets deliveries inside the body

The study was published in the journal Nature Communications.

Source: Max Planck Institute for Intelligent Systems  View gallery – 4 images


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