According to foreign media reports, if not treated in time, the open wounds on the stomach wall will become very serious, and sometimes even need surgical treatment. But in the not too distant future, it is possible for a small robot to transplant new cells from the body to these wounds. Although you’ve heard of biopunctures used to help heal wounds, they are usually quite large and are therefore limited to external injuries.

in cooperation with Wenxiang Zhao, a doctoral student, Xu has developed a prototype snake like robot that can be inserted into a patient’s stomach through an endoscope. This is a delta robot, which means that its head consists of a rigid base surrounded by three independently moving arms. When inserted, it folds into a very thin shape and opens when it reaches the wound site. Once it has entered the target position, its arm will squeeze out a tube and squeeze out two kinds of hydrogel bio ink, one containing human gastric epithelial cells and the other containing human gastric smooth muscle cells. The material is then deposited on two separate layers to form a scaffold covering the wound.

Zhao said, “we tested the system in two ways. Firstly, the biological model of human stomach and endoscope is used to simulate the operation elements in the insertion and printing process. Then, we carried out bioprinting experiments in cell culture dishes to test the effectiveness of the device in bioprinting usable cells and wound healing ]10 days of cell culture showed that the printing cells maintained a high viability and stable proliferation, which showed the good biological function of the cells in the printing cell scaffold Global Tech