Bloqueos nerviosos bajo ultrasonido

Advantages and disadvantages of ultrasound guided

Advantage of ultrasound guided regional anesthesia methods.

  • High success rate
  • Safe performance of blocks
  • Direct visualization of neuronal and adjacent anatomical structures
  • Direct visualization of needle placement and spread of local anesthetics
  • The individual blocks are cheaper in comparison with other techniques in regional anesthesia
  • Amortization of high standard ultrasound equipment after 2500 blocks due to high success rates (with very low conversion rates to alternative anesthesia methods), low rate of complication (when the techniques are used appropriately), lower volume of local anesthetics, cheaper needle material.

Disadvantages associated with ultrasound guided regional anesthesia method.

  • High sophisticated additional education necessary
  • High initial costs of education and equipment

Techniques to block a peripheral nerve:

Recommended needle-type: Face tip. (Hybrid needle)

Painless puncture easy guidance, atraumatic and exact local anesthetic administration


In Plane Tecnique IP Ultrasound Temena GroupIn-Plane (IP) technique

  • The tip and the body of the needle are visible
  • The distance skin puncture area to the target structure is longer in comparison with OOP technique
  • Slight lateral movements of the probe are problematic
  • Reverberation artifacts impair the visibility behind the needle



Out of plane Tecnique OOP Ultrasound temena

Out-of-plane (OOP) technique

  • Only the tip of the needle is visible
  • The angle of the needle has to be adapted depending of the depth of the target structure

– Superficial target – Flat needle angle
– Deep target – steep needle angle


To view some demo videos on the techniques mentioned above, please visit our Youtube channel


Text supported by:

– Prof. Peter Marhofer
– Prof. Stephan Kapral
– Prof. Manfred Greher