| RESTT | respiratory therapy technician |
|---|---|
| RF | radial fiber; radio frequency; receptive field; regurgitant fraction; Reitland-Franklin [unit]; rela... |
| Rf | respiratory frequency; rutherfordium |
| RFT | respiratory function test; rod-and-frame test; right frontotransverse [fetal position] |
| RICU | respiratory intensive care unit |