| Completed | Optic Nerve Sheath Diameter Changes in Laparoscopic Cholecystectomy NCT07162922 | Engin Çetin | N/A |
| Completed | Ultrasound Assessment of Airway Edema During Laparoscopic Cholecystectomy NCT07021482 | Engin Çetin | N/A |
| Recruiting | Colchicine in Patients at Cardiac Risk Undergoing Major Non-Cardiac Surgery NCT06279000 | Cantonal Hospital of St. Gallen | Phase 3 |
| Recruiting | Perioperative Impact of Physical Activity on Short- and Long-term Morbidity and Mortality NCT06678360 | Karolinska Institutet | — |
| Recruiting | Enhanced Recovery Protocols in Gynecologic Oncology NCT06655506 | National and Kapodistrian University of Athens | — |
| Recruiting | Post Discharge After Surgery Virtual Care with Remote Automated Monitoring Technology-2 (PVC-RAM-2) Trial NCT04876950 | Population Health Research Institute | N/A |
| Recruiting | The Hypotension Prediction Index in Free Flap Transplant in Head and Neck Surgery. NCT05738603 | Jakub Szrama | N/A |
| Recruiting | The Effect of Continuous Glucose Monitoring in Surgical Patients With Diabetes. NCT06314061 | Christian S. Meyhoff | Phase 4 |
| Recruiting | Perioperative Complications After Neoadjuvant Radiotherapy for Colorectal Cancer NCT07249333 | Oncology Institute of Vojvodina | — |
| Not Yet Recruiting | Effect of Diabetes Mellitus on Cardiac Autonomic Function in Surgical Patients Undergoing General Anesthesia NCT06432270 | Zhujiang Hospital | — |
| Recruiting | Efficacy and Safety of Modified Si Jun Zi Tang in Perioperative NSCLC Treatment NCT06445881 | First Affiliated Hospital of Zhejiang University | Phase 2 |
| Unknown | SGLT2 Inhibitors and Perioperative Period NCT06326528 | Assiut University | — |
| Active Not Recruiting | Accuracy of Continuous Glucose Monitoring in Patients With Diabetes. A Prospective Observational Study NCT06297850 | University Hospital Bispebjerg and Frederiksberg | — |
| Unknown | Incidence of Perioperative Cerebrovascular Stroke in Assuit University Hospitals , Hospital Based Study NCT06314269 | Assiut University | — |
| Unknown | Medical Device for Airway Patency During Sedation NCT06270212 | Stairway Medical AB | N/A |
| Enrolling By Invitation | Exparel vs. Marcaine ESP Block for Post-cardiac Surgical Pain NCT06077422 | Rutgers, The State University of New Jersey | Phase 2 / Phase 3 |
| Completed | Standardised Drug Provocation Testing in Perioperative Hypersensitivity NCT06065137 | University Hospital, Antwerp | N/A |
| Completed | Preoperative Evaluation on Perioperative Complications NCT06203171 | Samsun University | — |
| Active Not Recruiting | The EPigenetic Consequences in Children of Intravenous vs Volatile Anaesthesia for Surgery (EPIVA) NCT05936853 | University Hospital Southampton NHS Foundation Trust | N/A |
| Not Yet Recruiting | Mitochondrial Function in the Peri-operative Setting: an Observational Study NCT05925998 | University Hospital Southampton NHS Foundation Trust | — |
| Not Yet Recruiting | Registry of Anesthesia and Perioperative Medicine NCT05869578 | Clinica Alemana de Santiago | — |
| Completed | Hypotension Predictive Index Effect on Intraoperative Hypotension During Pancreatic Surgery. NCT06097052 | Istituto Clinico Humanitas | — |
| Unknown | The Effect of Inadvertent Perioperative Hypothermia on Surgical Site Infection in Laparoscopic Choleistectomy. NCT06035627 | Cumhuriyet University | — |
| Completed | Magnesium Sulphate and Extubation Quality NCT05858957 | Cukurova University | Phase 4 |
| Completed | Sleep Quality After Cesarean Delivery NCT05757401 | Mahidol University | — |
| Completed | A Pilot Study of the Effects of 4 vs 3 Hours of Preoperative Fasting in Breast-feeding Infants NCT05573165 | Uppsala University Hospital | N/A |
| Completed | Iron Prehabilitation in Endometrial Cancer NCT06049693 | National and Kapodistrian University of Athens | Phase 4 |
| Unknown | Peri-operative Vitamin D Therapy for Hepatectomy NCT05650151 | National Taiwan University Hospital | N/A |
| Unknown | Retrospective Study on Perioperative Safety and Quality Control Based on Real World Data NCT06003517 | Peking Union Medical College Hospital | — |
| Unknown | Binaural Beat Stimulation to Improve Patient Outcome After Surgery and Anesthesia NCT05533112 | Technical University of Munich | N/A |
| Terminated | Preoperative Smoking Cessation in Patients Undergoing Surgery NCT05192837 | Luzerner Kantonsspital | N/A |
| Unknown | Prognostic Value of the Selvester QRS Score for Perioperative Myocardial Injury Following Non-cardiac Surgery NCT05453097 | Istanbul University - Cerrahpasa | — |
| Completed | Cardiovascular Outcomes and Mortality in Vascular Surgical Patients NCT05208957 | University of Cape Town | — |
| Unknown | Outcomes After Perioperative Stroke Following Cardiac Surgery NCT05333146 | University of British Columbia | — |
| Completed | Residual Gastric Volume After the Ingestion of Supplements Containing Carbohydrates and Whey Protein NCT05573854 | Federal University of Mato Grosso | N/A |
| Unknown | Predictors of Outcome After Perioperative Stroke NCT04214613 | University of British Columbia | — |
| Completed | Preoperative Ultrasound-based Protocol for Optimization of Fluid Therapy to Prevent Early Intraoperative Hypot NCT05171608 | Semmelweis University | N/A |
| Completed | Esketamine Combined With Pregabalin on Acute Postoperative Pain in Patients Undergoing Resection of Spinal Neo NCT05096468 | Beijing Tiantan Hospital | Phase 2 / Phase 3 |
| Completed | Perineal Flap Reconstruction Following Surgery for Advanced Pelvic Malignancy NCT05074082 | St Vincent's University Hospital, Ireland | — |
| Completed | The Influence of Fasting on Selected Hemodynamic Parameters Measured in a Non-invasive Way NCT04972500 | Medical University of Gdansk | N/A |
| Unknown | Administration of Antibiotic Prophylaxis for Transperineal Prostate Biopsy in Cipto Mangunkusumo Hospital NCT04985110 | Indonesia University | Phase 2 |
| Recruiting | Implementation of a Clinical Screening and Response System for Cardiac Complications After Noncardiac Surgery NCT05859620 | University Hospital, Basel, Switzerland | — |
| Unknown | Prevention of Perioperative Pulmonary Complications by Lung Recruitment During Laparoscopic Surgery NCT04728945 | Osaka University | N/A |
| Unknown | Validation of the QoR-15 Score for Emergency Surgery NCT04845763 | University Hospital, Angers | — |
| Unknown | Effectiveness of Intensive Perioperative Nutrition Therapy Among Adults Undergoing Gastrointestinal & Oncology NCT04347772 | Universiti Putra Malaysia | N/A |
| Unknown | Study of the Role of Hemostasis in Perioperative Anaphylaxis NCT04825158 | University Hospital, Strasbourg, France | — |
| Completed | Effects of Ondansetron, Metoclopramide and Granisetron on Perioperative Nausea and Vomiting in Patients Underg NCT05087615 | Shahid Beheshti University of Medical Sciences | Phase 3 |
| Completed | Esketamine and Perioperative Depressive Symptoms NCT04425473 | Beijing Tiantan Hospital | Phase 2 / Phase 3 |
| Completed | Effects of Surgical Timing on Perioperative Clinical Outcomes in Pancreaticoduodenectomy NCT06874660 | West China Hospital | — |
| Unknown | Stentless Florence Robotic Intracorporeal Neobladder (FloRIN) NCT05891535 | University of Florence | N/A |
| Recruiting | BRAIN-targeted Goal-directed Therapy in High-risk Patients undeRgOing Major electIve SurgEry: the BRAIN-PROMIS NCT04266574 | Istituto Clinico Humanitas | N/A |
| Recruiting | Perioperative Respiratory Care and Outcomes for Patients Undergoing High Risk Abdominal Surgery NCT04256798 | University of Birmingham | Phase 3 |
| Completed | Continuous vs Intermittent Monitoring of Respiratory and Heart Rate in Relation to Length of Stay NCT06973044 | Karolinska Institutet | — |
| Completed | Defining ENDOtypes in Perioperative Hypersensitivity by Extensive Cellular and Molecular PHENotyping (ENDOPHEN NCT04006106 | Assistance Publique - Hôpitaux de Paris | — |
| Terminated | Management of Angiotensin Inhibitors During the Perioperative Period NCT04506372 | UMC Utrecht | N/A |
| Completed | Wireless Assessment of Respiratory and Circulatory Distress - Continuous Glucose Monitoring NCT04473001 | University Hospital Bispebjerg and Frederiksberg | — |
| Completed | Post Discharge After Surgery Virtual Care With Remote Automated Monitoring Technology (PVC-RAM) Trial NCT04344665 | Population Health Research Institute | N/A |
| Completed | Prevention of Perioperative Hypothermia in Transurethral Resection Under Spinal Anaesthesia NCT04252820 | Dr. Negrin University Hospital | N/A |
| Recruiting | Perioperative Longitudinal Study of Complications and Long-term Outcomes NCT05331118 | UMC Utrecht | — |
| Completed | ERAS vs Conventional Approach in Peptic Perforation-RCT NCT04194060 | All India Institute of Medical Sciences, Bhubaneswar | N/A |
| Unknown | Development of a New Prognostic Assessment Tool for Postoperative Myocardial Injury NCT04286685 | University Hospital, Brest | — |
| Completed | The Effect of Early Mobilization and Fluid Consumption on Bowel Movements After Cholecystectomy NCT05800886 | Gazi University | N/A |
| Unknown | The Association Between Intraoperative Hypotension and Perioperative Stroke NCT04117867 | Qianfoshan Hospital | — |
| Completed | Effect of Fasting on the Non-invasive Measurement of the Body's Water Compartments NCT04665349 | Medical University of Gdansk | N/A |
| Completed | The Effect of Frailty to Perioperative Complications in the Elderly NCT04120012 | Peking Union Medical College Hospital | — |
| Completed | Preoperative Care In Ovarian Cancer Patients NCT04260334 | Dokuz Eylul University | N/A |
| Active Not Recruiting | Children's Acute Surgical Abdomen Programme NCT04602429 | University College, London | — |
| Completed | Reliability and Validity of a New Postoperative Track Assessment Tool NCT05092867 | University Hospital, Geneva | — |
| Recruiting | Exercise in Patients Undergoing Urologic Surgery NCT03954678 | Emory University | N/A |
| Completed | Large Doses of Methylprednisolone Combined With Gabapentin in Total Knee Arthroplasty NCT04653415 | Jagiellonian University | Phase 4 |
| Completed | Intraoperative Hypotension and Perioperative Myocardial Injury NCT03974321 | Karolinska Institutet | — |
| Completed | Incidence of 30 Day Return to Hospital Following Same Day Discharge Total Hip Arthroplasty NCT04120324 | University of British Columbia | — |
| Completed | Effect of Perioperative Glycemia Protocol on Glycemic Outcomes in Diabetic Patients Undergoing Abdominal Surge NCT04167410 | Saglik Bilimleri Universitesi Gulhane Tip Fakultesi | N/A |
| Completed | Fluid Optimisation in Laparoscopic Colorectal Procedures NCT04719884 | University Medical Centre Ljubljana | N/A |
| Completed | Safety and Feasibility Study of Robotic Assisted Transanal Total Mesorectal Excision for Rectal Cancer NCT04573738 | Third Military Medical University | N/A |
| Completed | Perioperative Morbidity in Elective Surgery Based on the Time of the Year NCT02958293 | TriHealth Inc. | — |
| Completed | The Effects of Listening Music During Breathing Exercises NCT05329519 | Saglik Bilimleri Universitesi Gulhane Tip Fakultesi | N/A |
| Completed | Body Mass Index and Obesity Surgery Mortality Risk Score in Perioperative Complications of Laparoscopic Sleeve NCT04427644 | Kahramanmaras Sutcu Imam University | — |
| Completed | The Factors Associated 30-day Mortality After Perioperative Cardiac Arrest in Adults Undergoing Non-cardiac Su NCT06712134 | Siriraj Hospital | — |
| Completed | Perioperative Fluid Management According to the Preoperative and Perioperative Glucose Level NCT03955237 | Istanbul University | N/A |
| Unknown | Trimodal Prehabilitation in Patients Undergoing Elective Surgery NCT05114408 | Medical University of Gdansk | N/A |
| Completed | Validation of a Novel Frailty Index in Surgical Cohorts NCT03971851 | University of Iceland | — |