The Efficacy and Safety of Accufuser Omnibus® (Elastomeric Infusion Pump); Comparative Clinical Trial

"* Subject patient selection: the purpose and method of this research will be explained to the patients who satisfy the exclusion criteria before surgery, and written consent regarding research participation will be obtained.~* Use of PCA equipment by patients is determined by randomization. Regardless of the PCA equipment type, the basal rate and bolus dose are equally set to 2 mL/hr and 2 mL for the entire research period.~* Epidural PCA regime: normal saline added to 0.75% ropivacaine 40 mL and fentanyl 15-20 mcg/kg for a total volume of 100 ml.~* After pretreatment, the chest epidural catheter is mounted in the pretreatment room or operating room. The catheter tip is adjusted to be fixed between T6-7 or T7-8.~* After mounting the catheter, a test dose of 1% lidocaine 3 ml and epinephrine 1:200.000 is injected. Ten minutes later, sensory loss and skin dermatome will be checked using an alcohol swab."

"* Subject patient selection: the purpose and method of this research will be explained to the patients who satisfy the exclusion criteria before surgery, and written consent regarding research participation will be obtained.~* Use of PCA equipment by patients is determined by randomization. Regardless of the PCA equipment type, the basal rate and bolus dose are equally set to 2 mL/hr and 2 mL for the entire research period.~* Epidural PCA regime: normal saline added to 0.75% ropivacaine 40 mL and fentanyl 15-20 mcg/kg for a total volume of 100 ml.~* After pretreatment, the chest epidural catheter is mounted in the pretreatment room or operating room. The catheter tip is adjusted to be fixed between T6-7 or T7-8.~* After mounting the catheter, a test dose of 1% lidocaine 3 ml and epinephrine 1:200.000 is injected. Ten minutes later, sensory loss and skin dermatome will be checked using an alcohol swab."