| Author, date, country | Patient group | Study type | Outcomes | Key results | Study weaknesses |
|---|---|---|---|---|---|
| Maslow AD et al, 2000, USA | 60 asthmatic patients undergoing intubation | Prospective randomised controlled trial | Lower pulmonary resistance | 8.2 v 7.6 cm water (ns) | |
| 1.5 mg/kg lidocaine v saline given 3 min before tracheal intubation | Frequency of airway response to intubation | 6/30 v 5/ 27 (ns) |