Role of Reversal in General Anesthesia

Importance of Neuromuscular Blockade Reversal

Pharmacological reversal of neuromuscular blockade is strongly recommended following the use of muscle relaxants during general anesthesia to prevent residual neuromuscular blockade and associated complications, as recommended by the American Society of Anesthesiologists 1, 2
Residual neuromuscular blockade is associated with higher morbidity and mortality within the first 24 hours postoperatively, increased risk of critical respiratory events, postoperative pneumonia, pharyngeal muscle dysfunction, and delayed discharge from recovery, according to the American College of Surgeons 2

Quantitative adductor pollicis monitoring is recommended for diagnosing residual neuromuscular blockade, as suggested by the American Society of Anesthesiologists 2
A train-of-four ratio (T4/T1) of at least 0.9 at the adductor pollicis is required to eliminate the possibility of residual neuromuscular blockade, based on guidelines from the American College of Surgeons 2
No clinical test is sensitive enough to detect residual neuromuscular blockade; only quantitative instrumental monitoring can reliably assess recovery, as stated by the American Society of Anesthesiologists 2
Intraoperative monitoring of neuromuscular blockade is strongly recommended throughout the procedure, according to the American College of Surgeons 3, 4

After administering a non-depolarizing muscle relaxant, it is recommended to await spontaneous reversal with four detectable muscle responses at the adductor pollicis following TOF stimulation before administering neostigmine, as recommended by the American Society of Anesthesiologists 2
Administering neostigmine before adequate spontaneous recovery (four TOF responses) results in longer time to achieve full reversal, based on guidelines from the American College of Surgeons 2

Failure to monitor neuromuscular function quantitatively can lead to undetected residual blockade, as stated by the American Society of Anesthesiologists 2
Administering neostigmine too early (before four TOF responses are visible) results in ineffective reversal, according to the American College of Surgeons 2
Relying on clinical tests alone to assess recovery from neuromuscular blockade is inadequate, as recommended by the American Society of Anesthesiologists 2