Table 1
| Â | Â | Â | Simulated | Tube |
|---|---|---|---|---|
| Â | Isolated pig | Simulated | tracheal | motion |
| Â | trachea (n = 6) | IPPV | suction | in trachea |
Mallinckrodt Hi-lo | Leak | Leak | Leak | Leak |
Sheridan Preformed | Leak | Leak | Leak | Leak |
Portex Profile | Leak | Leak | Leak | Leak |
Portex Soft-Seal | No leak | No leak | No leak | No leak |