Korean J Anesthesiol.  2014 Feb;66(2):153-156. 10.4097/kjae.2014.66.2.153.

The effect of long-term oral dantrolene on the neuromuscular action of rocuronium: a case report

• Jeon J
• Song S
• Kim MC
• Kim KM
• Lee S

• KMID: 2092436
• DOI: http://doi.org/10.4097/kjae.2014.66.2.153

Abstract

Oral dantrolene causes a dose-dependent depression of skeletal muscle contractility. A 52-year-old man treated with oral dantrolene for spasticity after spinal cord injury was scheduled to undergo irrigation and drainage of a thigh abscess under general anesthesia. He had taken 50 mg oral dantrolene per day for 3 years. Under standard neuromuscular monitoring, anesthesia was performed with propofol, rocuronium, and sevoflurane. A bolus dose of ED95 (0.3 mg/kg) of rocuronium could not depress T1 up to 95%. An additional dose of rocuronium depressed T1 completely and decreased the train-of-four (TOF) count to zero. There was no apparent prolongation of the neuromuscular blocking action of rocuronium. The TOF ratio was recovered to more than 0.9 within 40 minutes after the last dose of rocuronium. A small dose of oral dantrolene does not prolong the duration of action and recovery of rocuronium.

Keyword

Dantrolene; Relaxant; Rocuronium

MeSH Terms

Abscess
Anesthesia
Anesthesia, General
Dantrolene*
Depression
Drainage
Humans
Middle Aged
Muscle Spasticity
Muscle, Skeletal
Neuromuscular Blockade
Neuromuscular Monitoring
Propofol
Spinal Cord Injuries
Thigh
Dantrolene
Propofol