Comparison of the efficacy of pericapsular nerve group block (PENG) block versus suprainguinal fascia iliaca block (SFIB) in total hip arthroplasty: A randomized control trial

Background and aims: Hip replacement surgery is a commonly performed surgery with the aim of improving mobility in patients suffering from hip conditions. Though the modified suprainguinal approach of fascia iliaca block (SFIB) is commonly used, the analgesic efficacy is moderate and is associated with quadriceps weakness. The pericapsular nerve group (PENG) block has been used to block the sensory articular branches of the hip joint in various hip surgeries. This study aimed to compare SFIB with PENG block in terms of pain relief, opioid consumption and their adverse effects in patients undergoing primary total hip arthroplasties. (THA).

Methods: Seventy ASA I/II patients undergoing primary THA were enrolled in this double-blinded, randomized trial. Patients were randomly allocated to one of the two groups: Group P: ultrasound (US)-guided PENG block and Group S: patients received the US-guided SFIB.

Results: Postoperatively, there was statistically significant difference in numerical rating scale (NRS) scores at all-time intervals. Total morphine consumption in 24 hours and 48 hours was statistically more in SFIB group. Five patients had quadriceps weakness in the SFIB group. There was no difference in any other adverse effects.

Conclusion: US-guided PENG block significantly reduces perioperative morphine consumption and pain scores in THA patients when compared to SFI block. It is not associated with quadriceps weakness as seen in SFIB.