Fig. 5. (  A ) Verification of the needle’s position in a longitudinal echo plane. (  B ) Posterior longitudinal paravertebral sonogram: verification of the needle’s position. ES = erector spinae; PM = psoas major muscle; ▸= lumbar plexus; →= needle; *= needle tip. 

Fig. 5. (  A ) Verification of the needle’s position in a longitudinal echo plane. (  B ) Posterior longitudinal paravertebral sonogram: verification of the needle’s position. ES = erector spinae; PM = psoas major muscle; ▸= lumbar plexus; →= needle; *= needle tip. 

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