| Not Yet Recruiting | Comparison of the Efficacy and Safety of Intravenous Buprenorphine Administered Via PCA System Versus Oxycodon NCT07434427 | Medical University of Silesia | Phase 4 |
| Not Yet Recruiting | Benefit on Chronic Pain of Early Screening and Management of Patients With Persistent Postoperative Pain at 3 NCT07160595 | Fondation Hôpital Saint-Joseph | N/A |
| Recruiting | Comparison of IV Analgesia, Thoracic Epidural Analgesia, and ESP Block for Chronic Pain After Open Heart Surge NCT07257744 | Karadeniz Technical University | — |
| Not Yet Recruiting | Prevention of Postsurgical Chronic Pain in Children and Adolescents (PREVENDOL) NCT06638437 | University Rovira i Virgili | N/A |
| Recruiting | Placebo Effect In Spinal Cord Electrical Stimulation for Pain NCT06585033 | Sahlgrenska University Hospital | N/A |
| Not Yet Recruiting | Preoperative Erector Spinae Plane Block Versus Paravertebral Plane Block in Decreasing Post Mastectomy Pain Sy NCT06036979 | National Cancer Institute, Egypt | N/A |
| Active Not Recruiting | PANDORA: Paravertebral AdjuNctive DexamethasOne Palmitate Reducing Chronic Pain After Caridiac Surgery NCT05920967 | Xijing Hospital | N/A |
| Recruiting | A Comparative Effect of Echogenic Needle for Nerve Block on Acute and Chronic Postoperative Pain NCT06281431 | The Second Affiliated Hospital of Chongqing Medical University | N/A |
| Terminated | Surgical Outcomes Following Neurectomy Based Upon Response to Local Anesthetic Injection in Chronic Groin Pain NCT05386693 | The Cleveland Clinic | — |
| Completed | Pain Control Following Total Hip Arthroplasty NCT05062356 | St. Mary's Research Center, Canada | Phase 1 |
| Completed | The Effectiveness of Thoracal Epidural Steroid and Local Anesthetic Injection NCT06507995 | Ankara University | N/A |
| Withdrawn | Using Peripheral Nerve Stimulation (PNS) to Treat Chronic Post-surgical Pain (CPSP) After Knee Surgery NCT04670042 | Stanford University | N/A |
| Unknown | Chronic Postsurgical Pediatric Pain. Evaluation Risk Factors to Develop Chronic Postsurgical Pain in Children NCT04735211 | Guillermo Ceniza Bordallo | — |
| Completed | Help With Early Detection of Postoperative Neuropathic Pain Using SMS After Ambulatory Surgery NCT04313855 | Fondation Hôpital Saint-Joseph | N/A |
| Completed | Postoperative Painful Chronicization After Knee Replacement Surgery : Exploratory Study of BDNF's Kinetics NCT04604847 | University Hospital, Montpellier | N/A |
| Unknown | Persistent Postoperative Pain After Major Emergency Abdominal Surgery NCT04508465 | Zealand University Hospital | — |
| Completed | QLB After Nephrectomy NCT03529201 | Medical University of Lublin | N/A |
| Unknown | Dexmedetomidine for Prevention of Chronic Postoperative Pain NCT03275207 | Zhongda Hospital | Phase 4 |
| Unknown | Prevalence, Impact and Predictors of Chronic Postoperative Pain NCT03363672 | Peking Union Medical College Hospital | — |
| Completed | Monocentric Observational Study: Postoperative Pain After Cesarean Section: Incidence and Risk Factors. NCT04280432 | Instituto de Investigación Hospital Universitario La Paz | — |
| Unknown | Validation of Predictive Scale of Chronic Postsurgical Pain NCT02991287 | Parc de Salut Mar | — |
| Completed | Data Collection for Prediction of Postoperative Chronic Pain for a Software NCT02190682 | Istanbul University | — |
| Unknown | Postoperative Pain After Ambulatory Arthroscopic Shoulder Surgery NCT02924519 | University of Aarhus | — |
| Withdrawn | Effects of Perioperative Pregabalin for Post-Craniotomy Pain NCT01591980 | Unity Health Toronto | Phase 4 |
| Completed | Femoral and Epidural Block After Total Knee Arthroplasty NCT02115945 | Aydin Adnan Menderes University | EARLY_Phase 1 |
| Completed | Menstrual Phase and Postoperative Pain NCT02137135 | Aydin Adnan Menderes University | EARLY_Phase 1 |
| Completed | Does a Multimodal no-Compression Suture Technique of the Intercostal Space Reduce Chronic Post-Thoracotomy Pai NCT02630849 | University of Roma La Sapienza | N/A |
| Completed | euCPSP: European Observational Study on Chronic Post Surgical Pain,PAIN-OUT Study NCT01467102 | European Society of Anaesthesiology | — |
| Completed | Low Dose Peri-operative IV Ketamine for Chronic Post-surgery Pain Prevention NCT01296347 | Imperial College Healthcare NHS Trust | Phase 4 |
| Completed | Analgesia in Laparoscopic Cholecystectomy NCT01388946 | University of Athens | N/A |
| Completed | Transition From Acute to Chronic Pain After Inguinal Hernia, Hysterectomy and Thoracotomy: Analysis of Risk Fa NCT01510496 | Fundacion IMIM | — |