By combining micro-imprinting and electro-spinning techniques, researchers at Shanghai University's Rapid Manufacturing Engineering Center have developed a vascular graft composed of three layers for the first time. This tri-layered composite has allowed researchers to utilize separate materials that respectively possess mechanical strength and promote new cell growth -- a significant problem for existing vascular grafts that have only consisted of a single or double layer. Vascular grafts are surgically attached to an obstructed or otherwise unhealthy blood vessel to permanently redirect blood flow, such as in coronary bypass surgery.
Traditional grafts work by repurposing existing vessels from the patient's own body or from a suitable donor. However, these sources are often insufficient for a patient's needs because of the limited supply in a patient's body, and may be afflicted by…
