Table 4.
| Inhaler | Counter type | Signal indicating the dose dispensed | Signal to confirm inhalation | System indicating a correct inhalation (inspiratory flow ≥ minimum value) | Possible digital DPI | |||
|---|---|---|---|---|---|---|---|---|
| Visual | Auditory | Visual | Auditory | Gustatory | ||||
| AirMaster® | U | – | + | – | – | + | – | – |
| Diskus®a | U | + | + | – | – | + | – | + |
| Easyhaler® | D | – | + | – | – | + | – | – |
| Ellipta® | U | + | + | – | – | + | – | + |
| Genuair® | Db | +c | + | +e | + | + | +g | – |
| Forspiro® | U | +d | + | – | – | + | – | – |
| NEXThaler® | Ub | – | + | +f | + | + | +h | + |
| Novolizer® | Db | +c | + | +e | + | + | +g | – |
| Spiromax® | U | + | + | – | – | + | – | + |
| Turbuhaler® | D | – | + | – | – | – | – | + |
| Twisthaler® | U | + | + | – | – | + | – | – |
U – unit dose counter, D – decimal dose counter.
a
Also the so-called disc-like DPI (G7, Diamond),
b
the dose counter activates (dispenses) only after an effective inhalation has been carried out,
c
the control window changes its colour (from red to green),
d
the empty blister coming out of the inhaler,
e
the control window changes its colour (from green to red),
f
doses are measured on the dose counter after the mouthpiece has been closed,
g
a click and the control window changing its colour (from green to red),
h
a click and measuring on the dose counter after the mouthpiece has been closed.