Moulds of an organ's delicate blood vessel network can be made with 3D-printed ice, helping to overcome the intricacies of growing transplant organs in a lab
Complex artificial organs could be created by 3D printing a mould of veins, arteries and capillaries in ice, casting that in organic material and then allowing the ice to melt away, resulting in a delicate, hollow network. This leaves a space for the intricate artificial blood vessels that are required to develop lab-grown internal organs.
Existing techniques can grow artificial skin or ears, but any flesh or organ material dies off if more than 200 micrometres from a blood vessel, says“It’s like twice the width of a hair; after you get past that, if there’s no access to nutrients, the cells start to die,” he says. Internal organs therefore require new processes if they are to become cheap and fast to manufacture.
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