Study on Efficacy of iv PCA With Fentanyl or Sufentanil in Patients Undergoing Laparoscopic Nephrectomy

Randomized Double-blind Study on Efficacy of iv PCA With Fentanyl or Sufentanil in Patients Undergoing Laparoscopic Nephrectomy

The purpose of this study is to compare the efficacy of iv PCA with fentanyl or sufentanil in patients undergoing laparoscopic nephrectomy

Inclusion Criteria:

1. patients undergoing laparoscopic or robot-assisted laparoscopic nephrectomy (total or partial)
2. patient who want intravenous PCA for postoperative pain control

Exclusion Criteria:

1. long-term use of opioid, pain reliever or tranquilizers
2. a history of DM neuritis
3. prolonged prothrombin time or activated partial thromboplastin time
4. impairment of cognitive function
5. obesity (BMI ≥ BMI 30 kg/m2)