Perioperative medicine & outcomes

Influence of Neostigmine on Early Postoperative Cognitive Dysfunction in Older Adult Patients Undergoing Noncardiac Surgery: A Double-Blind, Placebo-Controlled, Randomized Controlled Trial

Anesth AnalgPublished Randomised controlled trial

Primary result · Incidence of POCDResult — go to the resultDifference −22% 95% CI −37 to −7

Authors' conclusion

Neostigmine reduced POCD on the first day after noncardiac surgery in older patients. Neostigmine treatment inhibited oxidative stress and increased serum BDNF levels. There was no significant influence of neostigmine on POCD on the third or seventh day after surgery.

Study context

Population
Elderly patients (≥65 years) undergoing noncardiac surgery
Participants
118 patients
Comparison
Neostigmine vs placebo postoperatively
Primary endpoint
Incidence of postoperative cognitive dysfunction (POCD) (Z-scores for mini-mental state examination and Montreal Cognitive Assessment both ≤−1.96)
Methodological detailsdouble-blind, placebo-controlled
  • Double-blind
  • Placebo-controlled

Primary result

Incidence of POCD · First day after surgery

Difference

−22%

95% CI −37 to −7

Neostigmine vs Placebo
difference −22% (95% CI −37 to −7)

As reported in the abstract

Further findings

OutcomeDifference (95% CI)
Incidence of POCD · Third day after surgery8% (−4 to 20)
Incidence of POCD · Seventh day after surgery3% (−7 to 13)
OutcomeP value
Plasma MDA levels · First day after surgerySignificantly lower with neostigmineP = 0.016
Serum SOD levels · First day after surgeryIncreased with neostigmineP = 0.036
Serum BDNF levels · First day after surgeryIncreased with neostigmine.013

Original publication

Influence of Neostigmine on Early Postoperative Cognitive Dysfunction in Older Adult Patients Undergoing Noncardiac Surgery: A Double-Blind, Placebo-Controlled, Randomized Controlled Trial. Anesth Analg. Published 16 February 2024. doi:10.1213/ane.0000000000006687

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