1 Feels thick and substantial in your hands, and is the best type of uncoated paper stock available for full-color printing. 2  Standard uses: we exclusively offer 70# Lustre for stationery, envelopes, and newsletters.
If increased effort is needed to fill the lungs, supraclavicular and infraclavicular retraction may be seen. In infants, sternal retraction occurs with only a slight increase in respiratory effort, the result of the pliability of their chests. Compare intercostal bulging.
Respiratory distress syndrome, or RDS, in premature babies is one of the more common health problems caused by being born early. Immature lungs are the culprit in RDS, which causes difficulty breathing. The working parts of the lungs are the alveoli, tiny sacs in the lungs that inflate with air when we breathe. Alveoli are covered with tiny blood vessels that carry oxygen from the air we breathe to the rest of the body. In premature babies, the alveoli donât always work as well as they should.