| SMNB | submaximal neuromuscular block |
|---|---|
| SNR | selective nerve root [block]; signal-to-noise ratio; substantia nigra zona reticulata; supernumerary... |
| SNRB | selective nerve root block |
| SSBG | sex steroid-binding globulin; social services block grant |
| TAVB | total atrioventricular block |