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

The Analgesic Efficacy of Pericapsular Nerve Group (PENG) Block in Patients Undergoing Primary Total Hip Arthoplasty: a Prospective, Double-blinded, Randomized Controlled Trial

The aim of this study is to investigate the analgesic efficacy of the pericapsular nerve group (PENG) block during the implantation of hip endoprostheses. The study is designed as a prospective randomized double-blind study and the study participants were randomized into 2 arms and either 20 ml ropivacaine 0.5% (verum group) or 20 ml physiological saline solution (placebo group) will be applied.

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