Pediatric anesthesia & critical care
A novel approach to calculate the required volume of air for bronchial blockers in young children
Authors' conclusion
The bronchial blocker cuff should be regarded as a high-pressure balloon.
Study context
- Population
- Pediatric patients undergoing video-assisted thoracoscopic surgery with OLV using 5F bronchial blockers
- Participants
- 79 patients
- Exposure
- Right mainstem vs Left mainstem
- Outcome
- Air volume and balloon pressure required for bronchial occlusion
Methodological detailssingle-centre
- Single-centre
Main finding
As reported in the abstract
| Group | Value | Balloon pressure | Median balloon pressure |
|---|---|---|---|
| Left mainstem | <1 mL | 27 cm H2O | |
| Right mainstem | median 1.3 mL | 44 cm H2O |
Value
Left mainstem<1 mL
Right mainstemmedian 1.3 mL
Balloon pressure
Left mainstem27 cm H2O
Right mainstem— not stated in the abstract
Median balloon pressure
Left mainstem— not stated in the abstract
Right mainstem44 cm H2O
Observational data: associations, not effects.
Further findings
| Outcome | Right mainstem | Left mainstem |
|---|---|---|
| Mainstem bronchus length | median 5.3 (IQR 4.5–6.3) mm | median 21.8 (IQR 19.6–23.4) |
| Range | 2.7-8.15 | 14-29 |
Lung isolation quality
- Right: poor lung isolation due to tracheal bronchus
- 1
- Left: high isolation quality, no displacement
Safety
Airway injury and balloon displacement
- Left mainstem occlusion: no mucosal injury or displacement
- Right mainstem occlusion: 1 patient developed mild and transient airway injury
Original publication
A novel approach to calculate the required volume of air for bronchial blockers in young children. Paediatr Anaesth. Published 12 July 2024. doi:10.
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