Ultrasound-guided Femoral Nerve Block Without Electrical Stimulation of Peripheral Nerves
Condition: Nerve Block; Efficiency; Femoral Nerve; Ultrasonography
Study type: Interventional

Summary: 
      There is little work comparing the effectiveness of a femoral nerve block performed only
      under US guidance or US plus electrical stimulation of the peripheral nerve (EPN). The
      authors have shown the same effectiveness of these techniques(1).But the effectiveness of the
      blockade of the femoral nerve (complete blockade) performed in different ways turned out to
      be low valve: 71.7% for ultrasound in combination with electrical stimulation versus 69% for
      only ultrasound guidance.

      Research hypothesis: the blockade of the femoral nerve performed only under ultrasound
      control has the same effectiveness as the blockade performed under the ultrasound control
      with EPN.
    


Intervention name(s): Femoral nerve blockade under ultrasound control with a peripheral nerve stimulator; femoral nerve blockade under ultrasound control without a peripheral nerve stimulator
Intervention type(s): Procedure; Procedure
Intervention description(s): Following the ultrasound visualization of the femoral nerve, a insulated injection needle was connected to the nerve stimulator . Under ultrasound visualization guidance, the needle of the electronic nerve stimulator was positioned at the sciatic nerve (in plane) from its lateral side at a slightly superior position . A marker for LA introduction was the visualization of the needle end near the nerve, and a positive muscular response . Subsequently, the introduction of LA solution was initiated.If LA was spreading from the lateral side down to the nerve, then the needle was replaced to the upper point of the nerve and the rest of LA was introduced, and vice versa . The presence of a complete and incomplete spread of LA along the entire circumference of the nerve was assessed. Correspondingly, if the anesthetic was spreading upwardly, the needle would be downwardly replaced.
In addition, a sciatic femoral nerve block is performed.; Under ultrasound visualization guidance, the needle owas positioned at the femoral nerve (in plane) from its lateral side at a slightly superior position . A marker for LA introduction was the visualization of the needle end near the nerve. Subsequently, the introduction of LA solution was initiated. The position of the needle was corrected 1-2 times according to the type of anesthetic spread. If LA was spreading from the lateral side down to the nerve, then the needle was replaced to the upper point of the nerve and the rest of LA was introduced, and vice versa . The presence of a complete and incomplete spread of LA along the entire circumference of the nerve was assessed. Correspondingly, if the anesthetic was spreading upwardly, the needle would be downwardly replaced.
In addition, a sciatic nerve block is performed.
Intervention MeSH terms: Iodine
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: Single (Outcomes Assessor)
Primary purpose: Other
Keywords: femoral nerve block; ultrasound guidance; electrical stimulation of peripheral nerves