The Analgesic Efficacy of Pericapsular Nerve Group (PENG) Block in Patients Undergoing Primary Total Hip Arthoplasty:

Inclusion Criteria: * planned cementless hip TEP operation for primary coxarthrosis via minimally invasive anterolateral approach using the identical implant system (Taperloc stem, Plamafit cup) * Patient capable of giving consent * Informed consent has been obtained * age \> 18 years Exclusion Criteria: * Refusal to participate in the study * Regular use of opioids * Known chronic pain symptoms * Infections in the area of the puncture site * Presence of a contraindication to ropivacaine * Presence of a contraindication to metamizole * Presence of a contraindication to postoperative analgesia with diclofenac * Secondary forms of osteoarthritis with deformities (i.e. high-grade dysplasia, secondary conditions after trauma, secondary conditions after childtrauma, secondary conditions after childhood hip joint diseases * Spinopelvic dysbalance, spinal canal stenosis * Previous operations on the hip/pelvis