The investigators attempted to determine an adequate priming volume for our infusion system, and investigated the extent of a possible delay of the drug effect, that would result from mechanical defects of the infusion system, with or without priming the infusion system, using direct gravimetrical measurements of virtual infusate amounts during target controlled infusion of 2 remifentanil diluents.
Priming the infusion system (PRIMING) was performed using an evacuation of 2.0 ml to the atmosphere prior to Target-controlled Infusion (TCI). Forty eight TCI, using 50 μg/ml or 20 μg/ml of remifentanil diluents, were performed targeting 4.0 ng/ml of effect site concentration (Ceff), with or without PRIMING. Using simulations, the gravimetrical measurements of the delivered infusates reproduced actual predicted concentrations.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
PREVENTION
Masking
DOUBLE
Enrollment
48
for using experimental TCIs, targeting an effect-site concentration (Ceff) of 4.0 ng/ml, was performed using 50 μg/ml (Remi50) of remifentanil, with PRIMING
For using experimental TCIs, targeting an effect-site concentration (Ceff) of 4.0 ng/ml, was 20 μg/ml (Remi20) of remifentanil, and with PRIMING
Ajou University School of Medicine
Suwon, South Korea
delivered infusates of remifentanil
For targetting an effect-site concentration (Ceff) of 4.0 ng/ml, were randomly performed using 50 μg/ml (Remi50) or 20 μg/ml (Remi20) of remifentanil, and with or without PRIMING, TCI data files, including predicted plasma (Cp-proper), and effect-site (Ceff-proper) concentrations were saved
Time frame: base line from 30 min of TCI was maintained
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