Artificial blood vessels

Source, Sep 16, 2011: Artificial blood vessels created on a 3D printer

From the article:

Artificial blood vessels made on a 3D printer may soon be used for
transplants of lab-created organs.

Until now, the stumbling block in tissue engineering has been supplying
artificial tissue with nutrients that have to arrive via capillary
vessels.
A team at the Fraunhofer Institute in Germany has solved that problem
using 3D printing and a technique called multiphoton polymerisation.
The findings will be shown at the Biotechnica Fair in Germany in October.
Out of thousands of patients in desperate need of an organ transplant
there are inevitably some who do not get it in time.
In Germany, for instance, more than 11,000 people have been put on an
organ transplant waiting list in 2011 alone.