Hindlimb unilateral Psoas compartment block

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Anesthesia of the ipsilateral hindlimb including the hemipelvis and the hip joint (in combination with parasacral sciatic nerve block)

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Local anesthetics

Psoas compartment block (Nerve stimulation/US)

(Campoy et al. 2008)

Local anesthetics: Lidocain 0.5%, Mepivacain 0.5%, Bupivacain 0.5%, Ropivacain 0.75%
Initial setting NS: 0.5-1.0 mA, 2 Hz, 0.10 ms
Needle orientation: needle insertion at the level of spinous process L5, 1-2 cm paramedian, "in plane"
Muscle contraction: knee extension
Reduction of the amperage: in small increments to <0.5 mA
Correction of the needle position: in case of contact with the transverse process of L5 redirect needle caudally
MSC control: to avoid block failure
Aspiration and injection: slowly, Raj test, BSmart
Injection volume: 0.3-0.4 ml/kg
(Campoy et al. 2008)


Contrast radiograph: block of the lumbar plexus


  • Psoas compartment block (Nerve stimulation/US)

    Placing the linear array transducer at the level of the 5th lumbar vertebra in a transverse plane

  • Psoas compartment block (Nerve stimulation/US)

    Correct muscle response (Quadriceps muscle)

With the friendly assistance of
Dr. Georg Papadopoulos
Veterinary Specialist for Small Animals
Additional Certification: Anesthesia in Small Animals
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B. Braun Vet Care GmbH
Am Aesculap Platz
78532 Tuttlingen


As with any intervention in the body, peripheral nerve blocks also carry the risk of complications. The presented procedures and dosages are thoroughly reviewed and based on currently available scientific data and clinical experience but should only be considered as guidelines along the contents of the course. The responsibility for performing the nerve blocks shown on this site as part of any anesthesia regimen or pain management lies with the executing clinician. B. Braun Vet Care GmbH and Dr. Papadopoulos cannot be held responsible for any complications or adverse effects, that may arise from the described techniques or for any mistakes in the information provided.