Bio-artificial trachea made in Iran..A world's first

"Iranian doctors have carried out an in situ transplant of bio-artificial trachea in humans for the first time in the world.
A team of tissue-engineering scientists at the Lung and Tuberculosis Center at Tehran's Shahid Beheshti University of Medical Sciences and Health Services carried out the transplant on a 29-year-old woman who had lost her trachea in a car accident two years ago.
The researchers used bio artificial materials instead of stem cells and injected them directly into the trachea to make a good architecture of the organ.
Doctor Jalaladdin Anghavi, the head of the tissue-engineering team, told Press TV on Monday that a scaffold and Nanocapsules, with growth factors inside them, were injected to the patient's trachea.
"The Nanocapsules are designed in a way that could open and release the growth factors at the required time, with pre-determined density to build the needed tissue," he noted.
We injected Nanocapusles in a period of 21-28 days to rebuild the trachea, resembling the natural procedure of cure in the body, added Anghavi.
He said the patient is now in good state and breathing easily.
The innovative breakthrough was carried out without surgery and does not have any side effects.
Aljazeera