Conditions: Urinary Tract Problem
Keywords: Remifentanil Laryngeal mask airway removal Hemodynamic changing Infusion Ureterorenoscopy
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 42
Healthy volunteers: no

Brief summary:
The effect of maintenance remifentanil infusion with target controlled infusion during laryngeal mask airway removal on hemodynamic parameters and emergence quality is going to be investigated.

Detailed description:
In all patients (control group and remifentanil group induction of anesthesia will be achieved with desflurane and remifentanil.Anesthesia will be maintained with remifentanil (1-4 ng/mL) by TCI target controlled infusion, and desflurane . Throughout the surgery hemodynamic parameters are going to be recorded. As soon as the surgery has been finished, in control group remifentanil infusion and desflurane inhalation is going to be stopped.In remifentanil group,desflurane inhalation is going to be stopped and remifentanil infusion will be maintained until the removal of LMA. During the emergence period the time of eye opening, hemodynamic parameters and emergence quality (score 1-2)are going to be recorded.

Arms:
arm 1: Remifentanil:1.5ng/ml remifentanil infusion maintained at the end of the surgery arm 2: Control:Remifentanil stopped at the end of the surgery

Interventions: intervention 1: remifentanil
Intervention descriptions: intervention 1: 1-4 ng/mL i.v. infusion during the surgery, maintenance dosage till LMA removal is 1.5 ng/mL.

Protocol document: