Selective distal block of the infrapatellar branch of the saphenous nerve: anatomical and ultrasonographic insights.

Purpose: The infrapatellar branch of the saphenous nerve (IPBSN) plays a critical role in cutaneous innervation of the anterior knee and is frequently implicated in both acute and chronic post-surgical pain. Due to its anatomical variability, precise localization is essential for effective nerve blocks and minimizing iatrogenic injury. This study evaluates the feasibility of two distal ultrasound-guided approaches for selective IPBSN blocks, with the aim of addressing the limitations of proximal techniques.