Travel agents or agencies must have an identifying number called an IATA, or International Air Transport Association, number to work with travel suppliers such as tour operators and airlines. Having IATA accreditation simplifies the business relationship between travel suppliers and travel agents.
Shunt (medical) In medicine, a shunt is a hole or a small passage which moves, or allows movement of, fluid from one part of the body to another. The term may describe either congenital or acquired shunts; and acquired shunts (sometimes referred to as iatrogenic shunts) may be either biological or mechanical.
intrapulmonary shunt. (in respiratory therapy) a condition in which a region of the lungs is perfused with little or no ventilation. It is indicated by a low ratio of QS/QT, in which QS represents the difference between end capillary oxygen content and mixed venous oxygen content and QT represents cardiac output.