Equi-lasting doses of rocuronium, compared to mivacurium, result in improved neuromuscular blockade in patients undergoing gynecological laparoscopy : [Des doses de durée équivalente de rocuronium, comparé au mivacurium, améliorent la curarisation chez des patientes qui subissent une laparoscopie gynécologique].

Abstract

PURPOSE:

To compare equi-lasting doses of a short-acting (mivacurium) to an intermediate-acting (rocuronium) neuromuscular relaxant, with regard to intubating conditions, efficacy, number of maintenance doses, hemodynamic alterations, adverse events and costs, in patients undergoing laparoscopic gynecological surgery.

METHODS:

Sixty patients were randomly allocated to receive either 0.2 mg*kg(-1) (3 x ED(95)) mivacurium or 0.5 mg*kg(-1) (1.7 x ED(95)) rocuronium, under propofol/fentanyl anesthesia. T1, first twitch of the train-of-four (TOF) and TOF ratio (T4:T1) were used to evaluate neuromuscular block using the Relaxometer(R) mechanomyograph. The trachea was intubated when T1 was maximally suppressed. Neuromuscular block was maintained at 25% T1 with equi-lasting doses of 0.075 mg*kg(-1) mivacurium or 0.15 mg*kg(-1) rocuronium.

RESULTS:

Mean (min) +/- SD mivacurium onset time (1.9 +/- 0.4) was longer than that of rocuronium (1.3 +/- 0.3). This did not yield a statistical difference in intubating conditions between the two groups. Interval 25-75% T1 recovery and time to 0.8 TOF recovery were prolonged following rocuronium (11.9 +/- 3.9, 52.6 +/- 15.5 respectively) compared to mivacurium (6.7 +/- 2.3, 39.2 +/- 8.1 respectively). More patients, 22/30, required mivacurium maintenance doses compared to 14/30 patients in the rocuronium group. Arterial blood pressure declined and 13/30 patients manifested erythema following mivacurium administration. The acquisition costs of rocuronium (6.93 Euro/patient) were 23% lower compared to mivacurium (8.96 Euro/patient).

CONCLUSION:

Equi-lasting doses of rocuronium resulted in favourable intubating conditions more rapidly, improved hemodynamic stability, required less frequent administration of maintenance doses and were not associated with erythema, compared to mivacurium.

• Authors: A A Dahaba, E Schweitzer, R D Fitzgerald, S Schwarz
• Journal: Canadian journal of anaesthesia = Journal canadien d'anesthesie (Can J Anaesth) Vol. 48 Issue 11 Pg. 1084-90 (Dec 2001) ISSN: 0832-610X [Print] United States
• PMID: 11744584 (Publication Type: Clinical Trial, Comparative Study, Journal Article, Randomized Controlled Trial)

Chemical References

• Androstanols
• Isoquinolines
• Neuromuscular Nondepolarizing Agents
• Mivacurium
• Rocuronium

Topics

• Adolescent
• Adult
• Androstanols (administration & dosage, adverse effects, economics)
• Anesthesia, Inhalation
• Double-Blind Method
• Female
• Gynecologic Surgical Procedures
• Hemodynamics (drug effects)
• Humans
• Intubation, Intratracheal
• Isoquinolines (administration & dosage, adverse effects, economics)
• Laparoscopy
• Middle Aged
• Mivacurium
• Neuromuscular Blockade (adverse effects, economics)
• Neuromuscular Nondepolarizing Agents (administration & dosage, adverse effects, economics)
• Prospective Studies
• Rocuronium