Activity of sternocleidomastoid (SCM) muscles with different levels of pressure support ventilation (PSV)
| Level of PSV | Patient no. | |||||||
|---|---|---|---|---|---|---|---|---|
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| PS20 | − | − | − | − | − | − | − | − |
| PS15 | − | − | − | − | − | − | − | − |
| PS10 | − | − | − | − | − | − | − | + |
| PS5 | + | + | + | + | + | − | + | + |
| SB | + | + | + | + | + | − | + | + |
− = absence of SCM activity; + = presence of SCM activity; SB = spontaneous breathing.