Final answer:
Anastomosis is the surgical procedure that connects two ducts or blood vessels together, often used in procedures like coronary artery bypass grafts or to treat a patent ductus arteriosus in newborns.
Step-by-step explanation:
The surgical procedure that joins two ducts or blood vessels to allow flow from one to the other is called anastomosis. This technique is commonly used by vascular surgeons to bypass blocked or damaged areas of blood vessels, or to redirect blood flow as required. For example, anastomosis is critical in a coronary artery bypass graft (CABG), where it facilitates blood flow around a blocked coronary artery. In the context of congenital conditions such as a patent ductus arteriosus (PDA), where the ductus arteriosus fails to close after birth, this procedure can be part of the treatment to correct the resulting abnormal blood flow between the aorta and pulmonary artery.