The novel proximal para-iliopsoas (PPIP) block for hip surgery: A technical report

Minimum effective concentration of ropivacaine for ultrasound-guided transmuscular quadratus lumborum block in total hip arthroplasty: a randomized clinical trial

“…Almeida proposed the LALaT block, 34 DeFI block 35 and the PPIP. 36 These three blocks were performed on supine position, which could improve the comfort of patients. These three blocking methods were simple to operate and had good analgesic effects, which were promising and worthy of further exploration.…”