| RTU | real-time ultrasonography; relative time unit; renal transplantation unit |
|---|---|
| SCU | self-care unit; special care unit |
| SDU | standard deviation unit; step-down unit |
| SICU | spinal intensive care unit; surgical intensive care unit |
| SPU | short procedure unit; Society of Pediatric Urology; standardized photometric unit |
| lung unit | A respiratory bronchiole together with the alveolar ducts and sacs and pulmonary alveoli into which the respiratory bronchiole leads, considered by some to include the terminal bronchiole and its subdivisions, and called a pulmonary acinus. (05 Mar 2000) |
|---|