Overall outcomes from all studies
| Outcome measure: | n/N= | % | 95% CI |
|---|---|---|---|
| Success with HV alone: | |||
| All cases | 1060/1235 | 85.8 | 83.7 to 87.7 |
| As outpatient | 761/977 | 77.9 | 75.2 to 80.4 |
| PSP | 344/413 | 83.3 | 79.4 to 86.6 |
| SSP | 110 124 | 88.7 | 81.9 to 93.4 |
| Iatrogenic pneumothorax | 237/243 | 97.5 | 94.7 to 98.9 |
| Need for surgery (all HV cases) | 119/1181 | 10.1 | 8.5 to 11.9 |
| Reoccurrence (all HV cases: 6–31 months follow up) | 40/266 | 15.0 | 11.2 to 19.8 |
‘Success’ is defined as the ‘use only of a HV (with intercostal catheter) to manage the pneumothorax, that is, avoidance of larger ICT and/or surgery’ with all studies having variable designs and management algorithms.
HV, Heimlich valve; PSP, primary spontaneous pneumothorax; SSP, secondary spontaneous pneumothorax.