The investigators compared continuous epidural infusion with combined continuous femoral and single-shot sciatic nerve blocks. The primary outcome was the incidence of side effects, and secondary outcomes were pain relief, motor blockade,morphine consumption, and rehabilitation indices.
The parcicipants were randomly assingned to epidural infusion group and femoral sciatic block. In epidural infusion group, a lumbar epidural catheter was placed at the L3-4 level using loss-ofresistance procedure. ropivacaine 0.2% and fentayl 2mcg/ml were infused at a rate of 5ml/hr from the end of operation. In femoral sciatic group, the femoral and sciatic nerve are located using ultrasound and 0.2% ropivacain is injected. A catheter is inserted to femoral nerve. From the end of operation, 0.2% ropivacaine was infused through the femoral catheter at a rate of 5ml/hr. The incidence of side effects is measured.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
SINGLE
Enrollment
80
Lumbar epidural catheter is placed at the L3-4 level using loss-ofresistance procedure. Fentayl 2mcg/ml and 0.2% ropivacaine are infused at a rate of 5ml/hr.
After femoral and sciatic nerve are identified using ultrasound, 0.2% ropivacaine 20 mL is injected. A catheter is inserted to femoral nerve and 0.2% ropivacaine is infused through the femoral catheter at a rate of 5ml/hr from the end of surgery.
Lumbar epidural catheter is placed at the L3-4 level using loss-ofresistance procedure. Fentayl 2mcg/ml and 0.2% ropivacaine are infused at a rate of 5ml/hr.
Department of Anesthesiology and Pain Medicine, Yeungnam University hospital
Daegu, South Korea
RECRUITINGthe incidence of side effects
Side effects: The patients were asked to their experience of dizziness, sedation, nausea/vomiting (PONV), and pruritus. Urinary retention: bladder volume was measured by ultrasonography and if the volume was more than 400 mL and if the patient was unable to void spontaneously, single catheterization was performed.
Time frame: during 5 days after the end of operation
Pain
Pain according to visual analogue scale at rest and on mobilization.
Time frame: during 5 days after the end of operation
Motor blockade at rest and on mobilization
Motor blockade is estimated using a modified Bromage scale
Time frame: during 5 days after the end of operation
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After femoral and sciatic nerve are identified using ultrasound, 0.2% ropivacaine 20 mL is injected. A catheter is inserted to femoral nerve and 0.2% ropivacaine is infused through the femoral catheter at a rate of 5ml/hr from the end of surgery.