Magnesium as Adjuvant for Sciatic Block

Evaluation of Magnesium as Adjuvant to Ropivacaine for Sciatic Block at Popliteal Level.

The aim of the study is to evaluate if Magnesium added to ropivacaine can reduce onset time and can enhance offset time.

Patients are randomly divided into two groups: group "M" (Ropivacaina 7,5 mg/ml with Mg 4 mg/Kg)and group"C" (without Mg).

Standard monitoring is applied to each patient in perioperative period. An indipendent observer collect data: time to perform block, sensitivity onset,motor onset, pain during surgery and complication.

In the post-operative period till 24 hours for each patient is evaluated off-set time, pain and analgesic consumption.

Inclusion Criteria:

• given consent
• allux valgus correction surgery

Exclusion Criteria:

• allergy to local anesthetic
• infection in the site of puncture