PENG vs L-ESPB With S-ESPB for Analgesia in Total Hip Arthroplasty

"Sham ultrasound-guided pericapsular nerve group (PENG) block, lateral femoral cutaneous nerve (LFCN) block, lumbar erector spinae plane block (L-ESPB), and sacral erector spinae plane block (S-ESPB).~At each anatomical site, under ultrasound guidance, a block needle will be inserted to the correct position, and 1-2 mL of preservative-free normal saline (0.9% NaCl) will be injected to mimic the sensation of an active block. No local anesthetic will be administered. All patients will receive standard spinal anesthesia with 0.5% ropivacaine, 10-15 mg intrathecally for total hip arthroplasty."

"Ultrasound-guided pericapsular nerve group (PENG) block and lateral femoral cutaneous nerve (LFCN) block, with sham lumbar and sacral ESPBs.~PENG block: 20 mL of 0.2% ropivacaine. LFCN block: 5 mL of 0.2% ropivacaine. Sham lumbar ESPB: 1-2 mL preservative-free normal saline at lumbar ESPB site. Sham sacral ESPB: 1-2 mL preservative-free normal saline at sacral ESPB site. All patients will receive standard spinal anesthesia with 0.5% ropivacaine, 10-15 mg intrathecally for total hip arthroplasty."

"Ultrasound-guided lumbar erector spinae plane block (L-ESPB) and sacral erector spinae plane block (S-ESPB), with sham PENG and LFCN blocks.~Lumbar ESPB: 20 mL of 0.2% ropivacaine at L3 transverse process level. Sacral ESPB: 20 mL of 0.2% ropivacaine at sacral intermediate crest. Sham PENG block: 1-2 mL preservative-free normal saline at PENG site. Sham LFCN block: 1-2 mL preservative-free normal saline at LFCN site. All patients will receive standard spinal anesthesia with 0.5% ropivacaine, 10-15 mg intrathecally for total hip arthroplasty."