Use of smart glasses imaging for interscalene brachial plexus block: a randomised clinical trial
Authors' conclusion
Smart glasses reduced the procedure time for experienced anaesthetists performing interscalene brachial plexus block compared with the control group, and improved their hand-eye coordination and satisfaction.
Study context
- Population
- Patients undergoing upper limb surgery requiring interscalene brachial plexus block (ISB)146 analysed
- Participants
- 151 patients
- Comparison
- Smart glasses-assisted vs conventional ultrasound guidance for ISB
- Smart glassesn = 73
- Controln = 73reference
- Primary endpoint
- Total procedure time
Methodological detailsprospective, Four anaesthesiologists received standardised training
- Prospective
- Four anaesthesiologists received standardised training
Primary result
As reported in the abstract
Total puncture time
P < 0.001
Further findings
Ultrasound probe imaging time
P < 0.001
Time from first skin puncture to reaching target area
P < 0.001
Ergonomic satisfaction (score 4 or 5)
P < 0.001
| Outcome | Smart glasses | Control | P value |
|---|---|---|---|
| Operator head movements | 1.0 (IQR 1.0–2.0) | 5.0 (IQR 3.0–8.0) | P < 0.001 |
| Needle redirections | 3.00 (IQR 2.0–3.0) | 3.0 (IQR 2.0–4.0) | P = 0.004 |
Pain scores
- Similarly low in both groups
Safety
- No significant differences in adverse event rates
Original publication
Use of smart glasses imaging for interscalene brachial plexus block: a randomised clinical trial. Br J Anaesth. Published 14 August 2025. doi:10.
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