Perioperative medicine & outcomes

Sugammadex versus neostigmine for reversal of neuromuscular blockade and postoperative pulmonary complications (SNaPP): an international, randomised, controlled, phase 4 trial

Lancet Respir MedPublished Randomised controlled trial

Primary resultResult — go to the resultRelative risk 0.88 95% CI 0.77–1.00

Authors' conclusion

Sugammadex reduced the incidence of postoperative pulmonary complications or death compared with neostigmine.

Study context

Population
Adults aged ≥40 years having abdominal or thoracic surgery under GA lasting ≥2 h, expected postoperative stay ≥1 night; 44 hospitals in Australia, Aotearoa New Zealand and Hong KongITT population
Participants
3,498 adults
Comparison
Sugammadex vs Neostigmine
  • Sugammadexn = 1,745
  • Neostigminen = 1,753reference
Primary endpoint
Postoperative pulmonary complications or death
Follow-up
Up to hospital discharge (or postoperative day 7 if still in hospital)
Methodological detailspragmatic, international, multicentre, phase 4, masked outcome assessment, stratified by centre
  • Pragmatic
  • International
  • Multicentre
  • Phase 4
  • Masked outcome assessment
  • Stratified by centre

Primary result

As reported in the abstract

Relative risk

0.88

95% CI 0.77–1.00

P = 0.049

Events by treatment group

Sugammadex vs Neostigmine
RR 0.88 (95% CI 0.77–1.00); P = 0.049

Further findings

OutcomeSugammadexNeostigmineRR (95% CI)P value
Death0.1%0.1%0.50 (0.05–5.53)P > 0.99
Atelectasis18.4%21.1%0.86 (0.76–0.99)P = 0.030
Pneumonia2.1%2.2%0.98 (0.62–1.53)P = 0.92
Pulmonary aspiration0.2%0.4%0.57 (0.17–1.96)P = 0.38

ARDS

ARDS not reported

Safety

No adverse events deemed treatment related

Original publication

Sugammadex versus neostigmine for reversal of neuromuscular blockade and postoperative pulmonary complications (SNaPP): an international, randomised, controlled, phase 4 trial. Lancet Respir Med. Published 9 June 2026. doi:10.1016/s2213-2600(26)00158-x

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