Synergism between rocuronium and cisatracurium: comparison of the Minto and Greco interaction models / 대한마취과학회지
Korean Journal of Anesthesiology
;
: 341-349, 2016.
Article
in English
| WPRIM
| ID: wpr-41325
ABSTRACT
BACKGROUND:
This study was conducted to investigate the pharmacodynamic interaction between rocuronium and cisatracurium using the response surface model, which is not subject to the limitations of traditional isobolographic analysis.METHODS:
One hundred and twenty patients were randomly allocated to receive one of the fifteen predefined combinations of rocuronium and cisatracurium. To study single drugs, cisatracurium 0.2, 0.15, or 0.1 mg/kg or rocuronium 0.8, 0.6 or 0.4 mg/kg doses were administered alone. To study the pharmacodynamic interaction, drugs were applied in three types of combination ratio, i.e., half dose of each drug alone, 75% of each single dose of rocuronium and 25% of each single dose of cisatracurium, and vice versa. Train-of-four (TOF) ratio and T1% (first twitch of the TOF presented as percentage compared to the initial T1) were used as pharmacodynamic endpoints, and the Greco and Minto models were used as surface interaction models.RESULTS:
The interaction term α of the Greco model for TOF ratio and T1% measurements showed synergism with values of 0.977 and 1.12, respectively. Application of the Minto model resulted in U₅₀ (θ) values (normalized unit of concentration that produces 50% of the maximal effect in the 0 <θ< 1 region) less than 1 for both TOF ratio and T1% measurements, indicating that rocuronium and cisatracurium exhibit synergism.CONCLUSIONS:
Response surface modeling of the interaction between rocuronium and cisatracurium, based on considerations of their effects on muscle relaxation as measured by TOF ratio and T1%, indicated that the two drugs show considerable synergism.
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Pharmacology
/
Drug Interactions
/
Muscle Relaxation
Limits:
Humans
Language:
English
Journal:
Korean Journal of Anesthesiology
Year:
2016
Type:
Article
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