Study: NCT01734954

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Sciatic nerve anesthesia blockade at bifurcation.
Description: A proximal and distal initial scan and define the site to block the bifurcation. A puncture with an insulated needle guided by ultrasound and injection of levobupivacaine circumferential in 0.5% and a total volume of 20 mL.

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Sciatic nerve blockade 2 cm beyond the bifurcation
Description: A proximal and distal initial scan and define the sites to block: tibial and peroneal nerves separate distal 2 cm from the bifurcation site. A puncture with an insulated needle guided by ultrasound and injection of levobupivacaine circumferential in 0.5% 10 mL tibial nerve and 10 mL to the peroneal nerve.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Levobupivacaine 0.5%: 20 ml
Description: Levobupivacaine is a local anesthetic that is commonly use for anesthesia nerve blockade.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Levobupivacaine 0.5%: 20 ml
Description: Levobupivacaine is a local anesthetic that is commonly use for anesthesia nerve blockade.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Portable Ultrasound Machine: Sonosite, M-Turbo, Bothell, WA
Description: An ultrasound machine is a device that is widely used for the correct placement of the local anesthetic for anesthesia nerve blockade.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Portable Ultrasound Machine: Sonosite, M-Turbo, Bothell, WA
Description: An ultrasound machine is a device that is widely used for the correct placement of the local anesthetic for anesthesia nerve blockade.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Insulated Needle, (Stimuplex; Braun, Melsungen, Germany)
Description: This is a specific kind of needle that is widely used for anesthesia nerve blockade.

Intervention type: DEVICE
Group type: EXPERIMENTAL
Intervention: Insulated Needle, (Stimuplex; Braun, Melsungen, Germany)
Description: This is a specific kind of needle that is widely used for anesthesia nerve blockade.

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: supplemental oxygen
Description: supplemental oxygen during the block and/or during surgery

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: supplemental oxygen
Description: supplemental oxygen during the block and/or during surgery

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Midazolam
Description: Intravenous midazolam for sedation during the block and/or during surgery

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Midazolam
Description: Intravenous midazolam for sedation during the block and/or during surgery

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Intravenous analgesics
Description: Intraoperative administration intravenous of dipyrone 30-50 mg/Kg and or intravenous ketoprofen 100 mg or diclofenac 75 mg or ketorolac 30 mg

Intervention type: DRUG
Group type: EXPERIMENTAL
Intervention: Intravenous analgesics
Description: Intraoperative administration intravenous of dipyrone 30-50 mg/Kg and or intravenous ketoprofen 100 mg or diclofenac 75 mg or ketorolac 30 mg

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Saphenous nerve block
Description: Depending on sensitive territory committed by the type of surgery suprapatellar saphenous nerve block guided by ultrasound with 100 mm Stimuplex needle and injection of levobupivacaine 0.5% (total volume: 5 ml).

Intervention type: PROCEDURE
Group type: EXPERIMENTAL
Intervention: Saphenous nerve block
Description: Depending on sensitive territory committed by the type of surgery suprapatellar saphenous nerve block guided by ultrasound with 100 mm Stimuplex needle and injection of levobupivacaine 0.5% (total volume: 5 ml).