Characteristics of trials incuded in this review
| Reference | HFV type | Ventilator type | HLVS* | Surfactant | No of patients | Mean birthweight (kg) | Mean gestational age (weeks) | Mean age HFV started (hours) |
|---|---|---|---|---|---|---|---|---|
| Froese, 1987 16 | HFOV | HSMVB, (Metrex Instruments) | No | No | 15 | 1.1 (0.8) | 28 (1) | Not reported |
| HIFI, 1989 6 | HFOV | Hummingbird, (Senko Medical Instrument Manufacturing) | No | No | 673 | 1.1 (0.3) | 28 (2) | 6 (0.5) |
| Carlo, 1990 17 | HFJV | Self constructed¶ | No | No | 42 | 1.4 (0.3) | 30 (2) | 15 (4-30)† |
| Clark, 1992 7 | HFOV | Sensormedics 3100, (Sensormedics) | Yes | No | 83 | 1.1 (0.3) | 28 (3) | 9 (5) |
| Ogawa, 1993 8 | HFOV | Hummingbird BMO 20 N, (Senko Medical Instruments Manufacturing) | Yes | Yes | 92 | 1.2 (0.3) | 29 (2) | 2 (2) |
| Gerstmann, 1996 9 | HFOV | Sensormedics 3100 (A), (Sensormedics) | Yes | Yes | 125 | 1.5 (0.5) | 31 (2) | 3 (1) |
| Wiswell, 1996 23 | HFJV | Life Pulse HFJV, (Bunnell Inc) | No | Yes | 73 | 0.9 (0.3) | 27 (2) | 7 (5) |
| Keszler, 1997 10 | HFJV | Life Pulse HFJV (Bunnell Inc) | Yes | Yes | 130 | 1.0 (0.2) | 27 (2) | 8 (4) |
| Rettwitz-Volk 25 | HFOV | Stephan SHF 3000, (F Stephan Medizintechnik) | No | Yes | 96 | 1.1 (0.1) | 28 (1) | 1 (0.5) |
| Plavka 11 (in press) | HFOV | Sensormedics 3100A (Sensormedics) | Yes | Yes | 43 | 0.85 (0.2) | 26 (2) | Not reported‡ |
All values are expressed as mean (SD); * HLVS: high lung volume strategy; ¶ as described by Carlo WA et al in J Pediatr 1984;104:101-7 and by Carlon GC et al in Crit Care Med 1981;9:47-50. †Value expressed as mean (range); ‡ Ventilatory stabilisation on assigned ventilator mode according to the protocol within 3 hours after birth. HFV=high frequency ventilation; HFOV=high frequency oscillatory ventilation; HFJV=high frequency jet ventilation; CV=conventional ventilation; RDS=respiratory distress syndrome; BPD=bronchopulmonary dysplasia; CLD=chronic lung disease; HLVS=high lung volume strategy; RR=relative risk; CI=confidence interval.