| RSNA | Radiological Society of North America |
|---|---|
| RSO | radiation safety officer; Resident Surgical Officer; right superior oblique [muscle] |
| rSO2 | regional oxygen saturation |
| RSP | Rapid Sequence IVP |
| RSP | removable silicone plug; ribose-5-phosphatase; right sacroposterior [fetal position] |
| RSPCA | Royal Society for the Prevention of Cruelty to Animals |
| RSPH | Royal Society for the Promotion of Health |
| RSPK | recurrent spontaneous psychokinesis |
| RSR | regular sinus rhythm; relative survival rate; right superior rectus [muscle] |
| rSr | an electrocardiographic complex |