Forearm & Motor-sparing Wrist Blocks (Distal Upper Limb Blocks - Part 3 of 3) 

Hi Stefan, thanks for the very clear and pertinent question. Apologies for any confusion, and I appreciate the opportunity to clarify. For carpal tunnel release surgery specifically, I would do a median nerve + ulnar nerve + LACN block. See here - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-C728WYn7dGU.html Based on my accumulated experience, I can say that the LACN lies superficial and close to the radial artery - so in this respect, a "blind" SC infiltration to target the LACN should extend into the region just lateral to the radial artery to be sure of blocking it. So just slightly onto the volar aspect - but you do not have to go further out onto the volar surface than that. Since the publication of the video aboce, I have discovered that the LACN and the SRN are now very easily identified by looking for the brachioradialis muscle - they have a very consistent relationship superficial and deep to it. This is now what I teach all my trainees and colleagues. See here - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-QhaI84RUDNA.html and here - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-i6CUFSaU_vI.html