Assessment of Neuromuscular Function in Patients With Prior Cosmetic Procedures: A Case Report

Objective: The use of Botulinum toxin type A (Botox) for cosmetic procedures has become so prevalent that many patients do not always consider it to be a past surgical procedure, and it goes excluded from the medical record. Without the knowledge of prior Botox use, interpretation of facial nerve train-of-four testing may be inaccurate. Methods: We describe a 61-year-old woman with a history of multiple cosmetic procedures whose postoperative course was complicated by multiorgan system failure, requiring neuromuscular blockade while on mechanical ventilatory support. Results: Gauged by facial nerve stimulation, adequate neuromuscular blockade was assumed. However, patient-ventilator dyssynchrony motivated the decision to move the peripheral nerve stimulator to the ulnar nerve, where muscle twitches were observed. This indicated inadequate paralysis. Conclusions: This case report highlights the importance of monitoring neuromuscular function with ulnar nerve testing in patients with a history of cosmetic Botox procedures.