Quadratus lumborum block for total hip arthroplasty: anatomical knowledge is always key for choice of blocks and execution.

To the Editor We acknowledge Kukreja et al for their study regarding anterior quadratus lumborum (QL) block efficacy for total hip arthroplasty (THA).[1][1] However, we have some comments regarding the choice of block for this surgical procedure. The anterior QL block, initially entitled the