| Not Yet Recruiting | Simplified Exercise-based Risk Assessment in Lung Cancer NCT07506889 | Linkoeping University | — |
| Recruiting | Mitigating Delirium With Fluvoxamine Treatment for Non-Cardiac Surgery NCT06969287 | Washington University School of Medicine | Phase 3 |
| Recruiting | Postoperative Complications of Ankle Arthroscopy NCT07335133 | Clinique Saint Jean, France | N/A |
| Recruiting | IntraVenous Iron in Kids With Iron Deficiency and Scoliosis Study NCT07217873 | Columbia University | Phase 2 / Phase 3 |
| Not Yet Recruiting | Effects of GDHT (Goal Directed Hemodynamic Therapy) Using a Non-invasive Hemodynamic Monitoring in Elective Ne NCT07101991 | Brno University Hospital | N/A |
| Not Yet Recruiting | Immune Responsiveness and Outcome After Aortic Valve Surgery (Measure) NCT04430972 | Barts & The London NHS Trust | — |
| Withdrawn | Telemedicine Notifications With Machine Learning for Postoperative Care NCT03974828 | Washington University School of Medicine | N/A |
| Recruiting | Incidence of Hypotension in the Post-anesthesia Care Unit (PACU). NCT07022210 | Tomas Bata Hospital, Czech Republic | — |
| Recruiting | Comparison of Endoscopy and Esophagram for the Routine Evaluation of Anastomosis After McKeown Esophagectomy NCT07043491 | Sun Yat-sen University | — |
| Recruiting | Assessing Pancreatic Fistula Rates After Distal Pancreatectomy Using AEON Endostapler NCT06764134 | University Hospital Heidelberg | — |
| Recruiting | The STRIVE Before Surgery Trial NCT06511258 | Ottawa Hospital Research Institute | N/A |
| Completed | Dexmedetomidine Infusion and Postoperative Lung Aeration After Thoracic Surgery NCT06502002 | Brigham and Women's Hospital | N/A |
| Recruiting | Prevent Cardiac Surgery Associated AKI Trial NCT06620523 | George Washington University | Phase 2 |
| Recruiting | Precision Medicine in Cardiovascular Surgery Associated Acute Kidney Injury NCT06471621 | Insel Gruppe AG, University Hospital Bern | — |
| Recruiting | FUNCTIONAL ASSESSMENT FOR SURGERY BY A TIMED WALK NCT06412367 | Unity Health Toronto | — |
| Not Yet Recruiting | Prolonged Hypercoagulability Following Major Liver Resection for Malignancy NCT06153394 | Western University, Canada | Phase 3 |
| Not Yet Recruiting | Use of CPETarm for Risk Stratification of Patients With CLTI NCT06404229 | University of Manchester | N/A |
| Recruiting | Depth of Anesthesia on Postoperative Delirium and Cognitive After Surgery NCT06268080 | Auckland City Hospital | N/A |
| Recruiting | Study on Optimal Temperature During Cardiopulmonary Bypass (THERMIC-4) NCT05996120 | University of Leicester | N/A |
| Active Not Recruiting | The PREPARE for Cancer Surgery Study NCT06503185 | Ottawa Hospital Research Institute | — |
| Enrolling By Invitation | Analgesic Requirement for Post-Operative Pain Control in TLIP Interbody Fusion NCT06350981 | Foundation for Orthopaedic Research and Education | Phase 2 / Phase 3 |
| Active Not Recruiting | Effects of Chest Physiotherapy Exercise in Prevention of Pre and Post Operative Complications By Cardiac Surge NCT06378073 | Superior University | N/A |
| Not Yet Recruiting | Comparison of Total Tubeless Mini-PCNL Versus Tubeless Mini-PCNL NCT06288022 | Mahidol University | N/A |
| Unknown | Evaluation of the Efficacy of Allograft Versus Tenting Technique in Open Sinus Lifting With Immediate Implant NCT06254378 | Cairo University | N/A |
| Active Not Recruiting | Factors Influencing PAP and Its PM Among Patient Undergoing Elective Surgeries at Tertiary Care Hospital Marda NCT06768866 | Superior University | — |
| Completed | The STRIVE Before Surgery Pilot Trial NCT06042491 | Ottawa Hospital Research Institute | N/A |
| Recruiting | One-year Patency Comparison Between Radial Artery and No-touch Saphenous Vein Grafts in Women Undergoing Isola NCT06179329 | University of Sao Paulo General Hospital | N/A |
| Completed | Does Continuous Vital Sign Monitoring Increase Investigations and Interventions in Complication-free Patients? NCT06361862 | Rigshospitalet, Denmark | N/A |
| Unknown | Prediction of Complications After Major Gastrointestinal Surgery With Machine Learning and Point of Care Ultra NCT06166719 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | — |
| Recruiting | Post-operative Residual Voiding Volume Following Bulking and Vaginal Prolapse Surgery and Impact on In-hospita NCT06051916 | Odense University Hospital | N/A |
| Recruiting | Vital Sign Monitor Device Validation - WARD NCT06106516 | Rigshospitalet, Denmark | — |
| Recruiting | Trajectories of Recovery After Intravenous Propofol Versus Inhaled VolatilE Anesthesia Trial NCT05991453 | Washington University School of Medicine | N/A |
| Not Yet Recruiting | Mitochondrial Function in the Peri-operative Setting: an Observational Study NCT05925998 | University Hospital Southampton NHS Foundation Trust | — |
| Unknown | De-implementing Low Value Preoperative Care Wisely NCT05566327 | University of Calgary | N/A |
| Unknown | Outcomes of Endoscopic Operation in COVID-19 Infection: Cohort Study. NCT05685914 | Peking University Cancer Hospital & Institute | — |
| Recruiting | REmimazolam vs Propofol Total Intravenous Anesthesia on Outcomes After Major Noncardiac SurgEry NCT05728775 | Nanfang Hospital, Southern Medical University | Phase 4 |
| Active Not Recruiting | Central London Patient Safety Research Collaboration NCT05772195 | University College London Hospitals | — |
| Withdrawn | Crystalloid Fluids and Cardiac Surgery NCT05834257 | Centre hospitalier de l'Université de Montréal (CHUM) | N/A |
| Unknown | Oxygen Partial Pressure After Breast Cancer Surgery NCT05737446 | Umeå University | — |
| Completed | Substudy of MEET-OS (NCT04948632): Monitoring of Patients After Ambulatory Surgery by Biobeat® Devices NCT05686109 | Centre hospitalier de l'Université de Montréal (CHUM) | — |
| Completed | Enhanced Recovery After Surgery Protocol on Early Mobilization After Colorectal Surgery NCT06065696 | Indonesia University | — |
| Completed | Prognostic Indicators in Pituitary Adenoma Surgery: a Comprehensive Analysis of Surgical Outcomes and Complica NCT06053437 | Central Hospital, Nancy, France | — |
| Unknown | Cerebrolysin in Prevention of Postoperative Delirium in Cardiac Surgery NCT05864677 | Medical University of Lublin | N/A |
| Unknown | Improvement of the Safety of Care in Cataract Surgery Teaching on Eyesi Simulator (E3CAPS) NCT05722080 | Nantes University Hospital | N/A |
| Completed | Restrictive- vs Individualized Goal Directed Fluid Therapy in Liver Surgery NCT05704387 | Assistance Publique - Hôpitaux de Paris | N/A |
| Unknown | Remote Patient Monitoring for Preoperative Risk Assessment NCT06042023 | University of Leeds | N/A |
| Completed | Intestinal Microbiota and Postoperative Ileus After Colorectal Surgery NCT05512741 | University Hospital, Angers | — |
| Completed | THRIVE Feasibility Trial NCT05346588 | Washington University School of Medicine | Phase 3 |
| Terminated | Preoperative Smoking Cessation in Patients Undergoing Surgery NCT05192837 | Luzerner Kantonsspital | N/A |
| Completed | Multicenter National Trial of Clinical Results of Surgical Elderly Patients NCT05254262 | Germans Trias i Pujol Hospital | — |
| Unknown | The Quality of Recovery-15 Survey After Cardiac Surgery NCT05602298 | University of British Columbia | — |
| Completed | The Effectiveness of Urine mtDNA and Beta 2-MG to Predict Acute Kidney Injury for Critically Ill Surgical Pati NCT05458063 | Wonju Severance Christian Hospital | — |
| Recruiting | Compliance With ERAS Protocol in Pancreatic Surgery, Stress Response and Outcomes NCT05518643 | University of Thessaly | — |
| Completed | Why Still in Neurosurgical Ward After Tumor Craniotomy? NCT05288088 | Rigshospitalet, Denmark | — |
| Unknown | Early Discharge After Robotic Colorectal Surgery (eRCS): a Prospective Observational Study NCT05408182 | Ospedale di Camposampiero | — |
| Recruiting | Reconstruction in Extended MArgin Cancer Surgery NCT05219058 | University Hospital Southampton NHS Foundation Trust | — |
| Completed | The Effects of Nicardipine and Esmolol Applied for Controlled Hypotension NCT05430724 | Yuzuncu Yil University | N/A |
| Completed | Malnutrition Assessment Tools in Surgery NCT05393752 | University Hospital of Crete | — |
| Completed | The Incidence of Postoperative Pulmonary Complications in Patients With a Positive and Negative AIR-Test Durin NCT05345743 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | — |
| Completed | New Surgical Approach in Labioplasty NCT05988151 | Batman Training and Research Hospital | — |
| Unknown | Volar Locking Plate Versus External Fixation for Distal Radius Fracture - a Longterm Follow up NCT05371938 | Olof Skoldenberg | N/A |
| Unknown | A Predictive Score System for AKI Following Pediatric Cardiac Surgery NCT05489263 | China National Center for Cardiovascular Diseases | — |
| Completed | Use of Point-of-care Lung Ultrasound Before and After Surgery Trying to Predict Post-operative Pulmonary Compl NCT05502926 | Moshe Rucham MD | — |
| Unknown | Effect of Multimodal Postoperative Rehabilitation on Functional and Cognitive Decline NCT05290532 | Hospital of Navarra | N/A |
| Terminated | Standardization of Non-academic Center Surgical Morbidity and Mortality Conference: a Type I Hybrid Implementa NCT05286580 | Poudre Valley Health System | N/A |
| Unknown | The Intraoperative Complication Assessment and Reporting With Universal Standards - Calculator (ICARUS-C) NCT05270603 | University of Southern California | — |
| Unknown | Evaluation of Neuronal Damage in Patients Undergoing Robot-assisted Laparoscopic Radical Prostatectomy With Bi NCT05692804 | Akdeniz University | — |
| Unknown | Effect of Perioperative OPEP Therapy on Post-operative Pulmonary Complications NCT05134610 | Western University, Canada | N/A |
| Unknown | Preoperative Oral Antibiotics With vs Without Mechanical Bowel Preparation to Reduce Surgical Site Infections NCT04161599 | Hospital Universitari Vall d'Hebron Research Institute | Phase 4 |
| Completed | Adaptation of High Activity Arthroplasty Score to Turkish NCT05217264 | Harran University | — |
| Active Not Recruiting | Kerecis Case Registry for SurgiBind : Soft Tissue Reinforcement NCT05898711 | Kerecis Ltd. | — |
| Completed | Optimization of Outpatient Surgery at the CHUM Using the LeoMed Telecare Platform NCT04948632 | Centre hospitalier de l'Université de Montréal (CHUM) | N/A |
| Completed | Cardiology Consultation in Noncardiac Surgery NCT05532917 | Diskapi Yildirim Beyazit Education and Research Hospital | — |
| Completed | Quantification and Characterization of Foot Postoperative Edema NCT05190835 | Clinique MEGIVAL | N/A |
| Completed | Factors Affecting the Difficulty of Laparoscopic D2 Lymph Node Dissection for Gastric Cancer NCT05585073 | Fujian Medical University | — |
| Unknown | Predicting Morbidity and Mortality in Elderly Surgical Patients NCT05216107 | Hospital of Navarra | — |
| Completed | Early Postoperative Pain and 30-day Complications Following Major Abdominal Surgery: an Observational Study NCT05244655 | Radboud University Medical Center | — |
| Recruiting | Vascular Events In Patients Undergoing Same-day Noncardiac Surgery (VALIANCE) Study NCT04973397 | Centre hospitalier de l'Université de Montréal (CHUM) | — |
| Withdrawn | Novel Methods for Characterizing Patients With Post-operative Atrial Fibrillation Secondary to Abdominal Surge NCT04090918 | Frederiksberg University Hospital | — |
| Completed | Same Day Discharge After Laparoscopic Hysterectomy NCT05373238 | Bezmialem Vakif University | — |
| Unknown | PACU for Postoperative Care After Major Thoracic and Abdominal Surgery NCT05046925 | First Affiliated Hospital of Zhejiang University | — |
| Completed | Efficacy of LipiFlow in Patients Affected by Meibomian Gland Dysfunction in Reducing Post-cataract Surgery Dry NCT05062564 | Azienda Ospedaliero-Universitaria Careggi | N/A |
| Completed | Respiratory Strength Training in Cardiac Surgical Patients NCT04887415 | University of Florida | N/A |
| Active Not Recruiting | Tumescence in HNC Skin Graft Reconstruction NCT04967391 | University of California, Davis | Phase 3 |
| Recruiting | Zinc Oxide Versus Petrolatum Following Skin Surgery NCT03561376 | Melissa Pugliano-Mauro | EARLY_Phase 1 |
| Recruiting | Prognostic Factors in Periampullary Tumors and Cysts NCT05155878 | Umeå University | — |
| Completed | Risk Factors for Mechanical Failure After Spinal Fusion : an Observational Study NCT04983576 | Istituto Ortopedico Rizzoli | — |
| Completed | Laryngeal Disorders After Childhood Cardiac Surgery NCT04638361 | Hospices Civils de Lyon | — |
| Terminated | Opioid Free vs. Standard Perioperative Pain Regimen for Anterior Cervical Discectomy and Fusion (ACDF) Surgery NCT04990804 | Vanderbilt University Medical Center | Phase 4 |
| Completed | Gender Differences in Robotic Surgery for Rectal Cancer: a Retrospective Study NCT06391060 | Daorong Wang | — |
| Recruiting | The Role of Wearable Devices in Cardiothoracic Surgery: Predicting and Detecting Early Postoperative Complicat NCT04824066 | Massachusetts General Hospital | — |
| Completed | Intra-Operative Complication Assessment and Reporting With Universal Standards: Survey NCT04994392 | University of Southern California | — |
| Unknown | Clinical Study on the Safety of Double and a Half Layered Esophagojejunal Anastomosis in Curative Gastrectomy NCT05282563 | Henan Cancer Hospital | N/A |
| Unknown | Preoperative Exercise for Patients Undergoing Complex Cancer Surgery NCT03978325 | University of Dublin, Trinity College | N/A |
| Unknown | Prospective Snapshot Audit of Distal Pancreatectomy in Spain NCT04900012 | Hospital General Universitario de Alicante | — |
| Completed | Wearable Health Technology for Perioperative Risk Assessment NCT05083598 | Istituto Clinico Humanitas | — |
| Completed | BiZact Tonsillectomy in the Pediatric Population NCT04725305 | Baylor College of Medicine | N/A |
| Completed | Pilot Study for Postoperative Machine Learning NCT04877535 | Washington University School of Medicine | N/A |
| Completed | Accuracy of the Dexcom G6 Continuous Glucose Monitoring System Following Cardiac Surgery NCT04569240 | The Cleveland Clinic | N/A |
| Unknown | Wound And Symptom Tracking After Colorectal Surgery Using How2trak NCT04869774 | University of Ottawa | N/A |
| Not Yet Recruiting | Continuously Iterative Perioperative Holistic Evaluation of Risk and Hypotension Prediction Index NCT04807036 | University Hospital Southampton NHS Foundation Trust | — |
| Unknown | Ureteral Patency After Uterosacral Ligaments Suspension NCT05477043 | University of Milano Bicocca | — |
| Unknown | Effect of the Nutraceutical "MICODIGEST 2.0" on the Complications After Surgery for Colorectal Cancer NCT04821258 | Fundacin Biomedica Galicia Sur | N/A |
| Completed | Intraoperative Phlebotomies and Bleeding in Liver Transplantation NCT04826666 | Centre hospitalier de l'Université de Montréal (CHUM) | — |
| Completed | Development of Synthetic Medical Data Generation Technology to Predict Postoperative Complications NCT05986474 | Seoul National University Hospital | — |
| Completed | Goal-directed Therapy in Neurosurgery. NCT04754295 | Brno University Hospital | N/A |
| Completed | Relieving the Bile Ducts Prior to Pancreatoduodenectomy NCT05434520 | Rigshospitalet, Denmark | — |
| Unknown | Comparing the Efficacy of Conservative Treatment With Minimally Invasive Surgery in the Treatment of Rib Fract NCT04541758 | Shanghai 6th People's Hospital | N/A |
| Unknown | Evaluation of Surgical Complications and DFS in Obese Rectal Cancer Patients NCT06056726 | Federico II University | — |
| Withdrawn | Preoperative Microcirculation and Postoperative Outcome After Major Vascular Surgery NCT04679077 | Universitair Ziekenhuis Brussel | N/A |
| Completed | Ureteral Jets and Patient Positioning Study NCT04732403 | University of Arizona | N/A |
| Completed | Morbimortality in Major Urgent General Surgery in the Geriatric Patient. NCT04725968 | Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau | — |
| Unknown | GO SOAR1: Post-Operative Morbidity and Mortality Following Gynaecological Oncology Surgery NCT04579861 | Faiza Gaba | — |
| Completed | Intraoperative Hemodynamic Management and Postoperative Outcomes in Liver Transplantation NCT04732689 | Centre hospitalier de l'Université de Montréal (CHUM) | — |
| Completed | Screening for Postoperative Vital Signs Abnormalities, and Particularly Hemodynamic Ones, by Continuous Monito NCT04585178 | Hopital Foch | N/A |
| Unknown | Routine Staple Line Reinforcement for Minimally Invasive Distal Pancreatectomy NCT04663789 | Peking Union Medical College Hospital | N/A |
| Completed | Continuous vs Intermittent Monitoring of Respiratory and Heart Rate in Relation to Length of Stay NCT06973044 | Karolinska Institutet | — |
| Completed | Evaluation of the Introduction of a Colorectal Bundle in Left Sided Colorectal Resections NCT04550156 | University Hospital, Basel, Switzerland | N/A |
| Not Yet Recruiting | Does Prehabilitation Improve Outcome in Coloncancer Surgery? NCT04199208 | Region Skane | N/A |
| Terminated | ERAS Protocol in Pancreaticoduodenectomy and Total Pancreatectomy NCT03757455 | Tampere University Hospital | N/A |
| Unknown | Non-invasive Methods and Surgical Risk Stratification in Cirrhotics Undergoing Elective Extrahepatic Surgery NCT04615091 | Azienda Ospedaliera Universitaria Integrata Verona | — |
| Active Not Recruiting | The PreQ-20 TRIAL, a Prospective Cohort Study of Patients Undergoing Prepectoral Breast Reconstruction NCT04642508 | University Hospital A Coruña | N/A |
| Unknown | Variability of Heart Rate as a Marker of Complication of Colorectal Surgery NCT04367987 | Centre Hospitalier Universitaire de Nīmes | — |
| Completed | Incidence of Post-operative Atrial Fibrillation Secondary to Abdominal Surgery NCT04090905 | Frederiksberg University Hospital | — |
| Completed | Surgical and Oncologic Outcomes After Robotic Nipple Sparing Mastectomy and Immediate Reconstruction NCT04108117 | Severance Hospital | — |
| Completed | Textbook and Survival Outcomes of MIPD in South Korea NCT05975710 | Asan Medical Center | — |
| Unknown | The Utility of Enhanced Pre and Post-surgical Work-out to Prevent the Spread of COVID-19 in a Large Urology De NCT04409899 | Fundacio Puigvert | — |
| Active Not Recruiting | Mechanical Bowel Preparation and Oral Antibiotics Versus Mechanical Bowel Preparation Only Prior Rectal Surger NCT04281667 | Helsinki University Central Hospital | Phase 4 |
| Recruiting | The Impact of Abdominal Wall Closure Technique on Incidence of Incisional Hernia in Kidney Transplantation NCT03959904 | Manchester University NHS Foundation Trust | N/A |
| Unknown | Management of Acutely Symptomatic Hernia NCT04197271 | Sheffield Teaching Hospitals NHS Foundation Trust | — |
| Unknown | Celecoxib vs. Acetaminophen/Codeine/Caffeine for Post-operative Analgesia in Rhinoplasty. NCT04259333 | Blake Raggio | Phase 4 |
| Completed | Complications and Mortality Following Emergency Digestive Surgery During the COVID-19 Pandemic NCT04479150 | Hospital Universitari de Bellvitge | — |
| Terminated | ZEPLAST- PED: ZEro_PLASma Trial in Small Infants Undergoing Cardiac Surgery NCT04434001 | IRCCS Policlinico S. Donato | Phase 2 |
| Active Not Recruiting | The PREPARE Trial: Exercise Before Surgery to Improve Recovery in Older People With Frailty NCT04221295 | Ottawa Hospital Research Institute | N/A |
| Completed | Impact of the COVID-19 Pandemic on the Surgical Activity of Bellvitge University Hospital NCT04780594 | Hospital Universitari de Bellvitge | — |
| Unknown | 3D-HD Optic Systems Influence Surgical Performance NCT04185116 | Hospital Clinic of Barcelona | N/A |
| Completed | Impact of Deep Versus Standard Muscle Relaxation on Intra-operative Safety NCT04124757 | Leiden University Medical Center | N/A |
| Completed | Assessment of Complications in Patients Who Underwent LPN According to the CCI NCT05823545 | Samsun Liv Hospital | — |
| Unknown | CiNPT for Abdominoplasties in Post-bariatric Patients Study NCT04214236 | Azienda Ospedaliera, Ospedale Civile di Legnano | N/A |
| Completed | Influence of Cataract Surgery on Early DME The DICAT-II Study NCT04096131 | European School of Advanced Studies in Ophthalmology | — |
| Completed | Protocol for Patients Above 75 Years Undergoing Emergency Laparotomy NCT04293653 | Haukeland University Hospital | N/A |
| Completed | Machine Learning Models for Predicting Unforeseen Hospital Admissions or Discharges After Anesthesia NCT06582407 | HUmani | — |
| Completed | Neonatal Surgery Intensive Care Unit: Hacettepe Experience NCT04734002 | Hacettepe University | — |
| Completed | Robotic Versus Laparoscopic Roux En-y Gastric Bypass NCT05746936 | University of Foggia | — |
| Unknown | Thrombembolism After Robot- Assisted Surgery in Urology NCT04796740 | University Hospital Schleswig-Holstein | — |
| Unknown | Preemptive Endoluminal Negative Pressure in Minimally Invasive Transthoracic Esophagectomy NCT04162860 | University of Zurich | N/A |
| Completed | Can Thyroidectomy be Considered Safe in Obese Patients? NCT04273711 | University of Cagliari | — |
| Unknown | Role of Chest Ultrasound in Detection of Post-operative Pulmonary Complications After Cardiothoracic Surgery NCT04118621 | Assiut University | — |
| Suspended | Surgical and Patient Reported Outcomes of Robotic Nipple-Sparing Mastectomy NCT04151368 | University Health Network, Toronto | N/A |
| Not Yet Recruiting | Preoperative Intravenous Iron Therapy in Patients With Gastric Cancer NCT04168346 | Helsinki University Central Hospital | Phase 4 |
| Completed | Use of Wearables for Early Detection of Complications After Major Acute Abdominal Surgery NCT04257344 | Zealand University Hospital | — |
| Completed | Tonsillectomy Using BiZact™ - a Randomized Side-controlled Clinical Trial NCT03793816 | Medical University of Vienna | N/A |
| Unknown | Near Infrared (NIR) Autofluorescence Image-guided Thyroid Surgery NCT04193332 | Rigshospitalet, Denmark | N/A |
| Unknown | Effect of Preoperative Immunonutrition in Upper Digestive Tract NCT04027088 | Complexo Hospitalario Universitario de A Coruña | N/A |
| Completed | Management of Antiplatelet Regimen During Surgical Procedures NCT03981835 | Baylor Research Institute | — |
| Unknown | Incidence of Rhinological Morbidities During Endonasal Pituitary Surgery, With or Without Nasoseptal Flap NCT04493801 | University Hospital, Brest | — |
| Unknown | An Optimization in the Postoperative Treatment in Head and Neck--surgical Patients. NCT04021186 | University of Copenhagen | N/A |
| Completed | Telemedicine Control Tower for the Operating Room: Navigating Information, Care and Safety NCT03923699 | Washington University School of Medicine | Phase 3 |
| Unknown | Postoperative Diet With Hyperproteic Supplement Versus a Supplement With Imunonutrients, in Colorectal Cancer NCT04059731 | Hospital General Universitario Reina Sofía de Murcia | N/A |
| Completed | Quality of Life After Robotic Surgery for Endometrial Cancer NCT04281043 | Sahlgrenska University Hospital | — |
| Completed | Prediction of Sepsis After Flexible Ureteroscopy NCT04157452 | Tongji Hospital | — |
| Completed | Association of the Arteriovenous Difference in Carbon Dioxide and Its Relation to the Difference in Arterioven NCT03914976 | Hospices Civils de Lyon | — |
| Completed | Transitional Care Study 3 NCT03923127 | Philips Electronics Nederland B.V. acting through Philips CTO organization | N/A |
| Completed | Assessment of the Soluble Urokinase Plasminogen Activator Receptor in Non-cardiac Surgery (SPARSE) NCT03851965 | University of Thessaly | — |
| Terminated | Recovery of Ventilation After General Anesthesia in Morbidly Obese Patients NCT03925610 | Stanford University | — |
| Completed | Laparoscopic Partial Nephrectomy for cT1 Tumors NCT04213157 | Samsun Liv Hospital | — |
| Unknown | ROSSINI 2 - Reduction of Surgical Site Infection Using Several Novel Interventions NCT03838575 | University of Birmingham | Phase 3 |
| Completed | Side-to-side Duodenojejunostomy After Distal Duodenal Resection (DUORESECT) NCT04151394 | Universidad de Extremadura | — |
| Completed | Resection of the Inferior Vena Cava Due to Tumor Involvement NCT04154761 | Hospital Universitario Infanta Cristina | — |
| Unknown | Anastomotic Leakage and Enhanced Recovery Pathways After Colorectal Surgery NCT03771456 | Ospedale C & G Mazzoni | — |
| Unknown | Prophylaxis of Surgical Wound Infection With Topical Antibiotics NCT04476212 | Hospital de Granollers | N/A |
| Recruiting | Perioperative Management Evaluation in Patients With CIED NCT04331249 | Klinikum-Fuerth | — |
| Completed | Preoperative Oral Magnesium to Prevent Postoperative Atrial Fibrillation Following Coronary Surgery (POMAF-CS) NCT03703349 | St Joseph University, Beirut, Lebanon | Phase 4 |
| Completed | The Effect of Wound Problems Wound Dressing in Patients With Colorectal Cancer Surgery NCT04735133 | TC Erciyes University | N/A |
| Completed | The Clinical Significance of Portal Hypertension After Cardiac Surgery: a Multicenter Prospective Observationa NCT03656263 | Montreal Heart Institute | — |
| Completed | Verbal Probability Expressions in Peri-operative Risk NCT03720834 | Sheffield Teaching Hospitals NHS Foundation Trust | — |
| Completed | Abdominal Aortic Aneurysm Patients Remain at Risk for Delirium on the Surgical Ward After Intensive Care Unit NCT04080557 | Amphia Hospital | — |
| Completed | Outcome of Very Old Patients Admitted for Elective Major Surgery, the Effect of Frailty NCT03721471 | Haukeland University Hospital | — |
| Terminated | The Impact of Routine Measurement of Cardiac Troponin (hsTnT) on Outcome in Elderly Patients Undergoing Major NCT03605134 | Universitair Ziekenhuis Brussel | — |
| Completed | Intra-operative Application of HEMOPATCH to the Pancreatic Stump to Prevent Post-operative Pancreatic Fistula NCT03410914 | Sunnybrook Health Sciences Centre | Phase 2 |
| Unknown | Intraoperative Handover Checklist of Anesthesia Care Improves Outcomes Among Patients Undergoing Major Surgery NCT03597932 | First Affiliated Hospital of Zhejiang University | — |
| Completed | The Effect of Discharge Training on Surgical Recovery in Oncology Patients NCT04862104 | Aydin Adnan Menderes University | N/A |
| Completed | PeRioperative Omega Three and the Effect on ImmuNity NCT03598413 | Royal Surrey County Hospital NHS Foundation Trust | N/A |
| Completed | Postoperative Complication After Free Flap Reconstruction for Head and Neck Cancer NCT04326088 | Chang Gung Memorial Hospital | — |
| Unknown | Laparoscopic D2 Distal Gastrectomy Following Neoadjuvant Chemotherapy for Locally Advanced Gastric Cancers NCT03468712 | West China Hospital | N/A |
| Unknown | Current Surgical Practices and Surgical Site Infection at Ayder Comprehensive Specialized Hospital in Mekelle, NCT03761459 | University of Illinois at Chicago | — |
| Unknown | Prevention of Acute Kidney Injury by N-Acetylcystein in Patients Undergone Cardiac Valve Replacement NCT03440268 | University of Sao Paulo General Hospital | Phase 4 |
| Completed | Perioperative Metabolic and Hormonal Aspects in Major Emergency Surgery NCT03482830 | Zealand University Hospital | — |
| Completed | Carbohydrate Loading and Diabetes in Colorectal Surgery NCT04410419 | University of Alberta | N/A |
| Completed | Immediate Mobilization After Plate Osteosynthesis of Proximal Tibial Fractures - A Cohort Study NCT03314623 | Slagelse Hospital | — |
| Completed | A Prospective Study Frailty for Esophagectomy and Lung Resection in Thoracic Surgery NCT03413449 | The Cleveland Clinic | — |
| Completed | Myocardial Injury and Intraoperative Tissue Oximetry in Patients Undergoing Spine Surgery NCT03518372 | University of California, San Francisco | — |
| Terminated | Observatory of the Quality of Surgical Procedures for Digestive Cancers NCT03681600 | Moroccan Society of Surgery | — |
| Unknown | Thromboprophylaxis in Patients Undergoing Orthopedic Surgeries; Using Propensity Score Matching NCT03483181 | Hanoi Medical University | — |
| Completed | Bile Leakage Test in Emergency Hydatid Liver Cyst Surgery Case Report NCT04705961 | Dr. Ersin Arslan Education and Training Hospital | — |
| Completed | Myocardial Injury Following Non-cardiac Surgery NCT03317561 | Karolinska Institutet | — |
| Unknown | Preoperative Oral Nutritional Supplement vs Conventional Dietary Advice in Major Gastrointestinal Surgery NCT03315195 | Mahidol University | N/A |
| Withdrawn | Evaluation of Two Different Treatments for Lower Pore Renal Stone: Microperc Vs FURS NCT03307096 | Ningbo No. 1 Hospital | N/A |
| Completed | Acute Normovolemic Hemodilution (ANH) in Patients Undergoing Cardiac Surgery NCT04127825 | University of Minnesota | N/A |
| Completed | Pre-frailty and Rehospitalization in Cardiac Surgery NCT03949439 | Instituto Dante Pazzanese de Cardiologia | — |
| Completed | The Effect of Vitamin C on Wound Healing In Mandibular Fracture Patients NCT03938584 | Hennepin Healthcare Research Institute | N/A |
| Completed | Analysis of miRNAs Expression in Vasoplegic Syndrome After On-pump Coronary Artery Bypass Surgery NCT05354193 | University of Sao Paulo General Hospital | — |
| Completed | Connected Electronic Wrist Strap for Patient Follow-up After Cardiac Surgery NCT03113565 | CMC Ambroise Paré | — |
| Terminated | Dexamethasone, Flurbiprofen Axetil and Delirium After Lung Cancer Surgery NCT03200600 | Peking University First Hospital | Phase 4 |
| Completed | Cardiopulmonary Exercise Testing as an Outcome Predictor in Coronary Artery Bypass Surgery NCT03376542 | Eduardo Tibirica, MD, PhD | N/A |
| Unknown | Validation of Low Anterior Resection Syndrome Score in Korean Version NCT03211715 | Saint Vincent's Hospital, Korea | — |
| Completed | Periodontitis and Upper gi Post-operative Complications NCT03144973 | Helsinki University Central Hospital | N/A |
| Completed | Low Tidal MEChanical Ventilation Against NO Ventilation During Cardiopulmonary Bypass Heart Surgery NCT03098524 | CMC Ambroise Paré | N/A |
| Completed | Intraoperative Protective Ventilation for Obese Patients Undergoing Gynaecological Laparoscopic Surgery NCT03157479 | Catholic University of the Sacred Heart | N/A |
| Unknown | Complication in Laparoscopic Renal and Adrenal Surgery (CLARAS) NCT05322265 | University of Palermo | — |
| Completed | Perioperative Hypothermia and Myocardial Injury After Non-cardiac Surgery NCT03111875 | The Cleveland Clinic | N/A |
| Completed | Optical Trocar to Create the Pneumoperitoneum in Bariatric Patients NCT06207357 | University of Foggia | — |
| Completed | Cognitive Aids for the Management of Deteriorating Surgical Patients NCT03812861 | Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA) | N/A |
| Completed | Morbimortality in Older Patients Undergoing Urgent Abdominal Surgery NCT03205384 | Hospital of Navarra | — |
| Unknown | Thromboprophylaxis in Patients Undergoing Orthopedic Surgeries; Comparison Between Rivaroxaban and Enoxaparin NCT03299296 | Ahmed AbdelMoneim Hassan Ali | Phase 3 |
| Completed | Uniportal VATS Resection for Pulmonary Aspergilloma : Evaluation of Prognostic Factors in a Single Center Expe NCT06564727 | Hassan II University | N/A |
| Completed | A Real-world Study to Examine the Relationship Between Simple Physical Functioning Tests, Complications and Re NCT03930784 | University Hospital of Limerick | — |
| Completed | Probiotic Intervention After Surgical Removal of Mandibular Third Molars NCT04203771 | AB Biotics, SA | N/A |
| Completed | Fluorescent Imaging & Methylene Blue: Ureter Study NCT03177070 | University of Oxford | Phase 2 |
| Completed | Transobturator Urethral Sling Placement With an Autologous Rectus Facia NCT03949348 | Ankara Training and Research Hospital | N/A |
| Completed | Antithrombotic Therapy in Patients Undergoing CIED Surgery - HEMATOMA NO MORE Registry NCT03067909 | Azienda Ospedaliera Universitaria Senese | — |
| Completed | African Surgical Outcomes Study (ASOS) NCT03044899 | University of KwaZulu | — |
| Completed | Smoking Cessation Prior to Gynecological Surgery NCT03942146 | Sahlgrenska University Hospital | N/A |
| Completed | Effects of Video-Assisted Surgery on Ventilatory Parameters NCT04513262 | Institutul Clinic Fundeni | — |
| Completed | Survival After Emergency Laparotomy in Octogenarians NCT04176432 | Haukeland University Hospital | — |
| Completed | Sutures in Orbital Implants in Retinoblastoma Patients NCT04383860 | Sun Yat-sen University | N/A |
| Completed | Modified-FOLFIRINOX Regimen Based Neoadjuvant Therapy in Chinese Patients With Locally Advanced Pancreatic Can NCT03469375 | Second Affiliated Hospital, School of Medicine, Zhejiang University | — |
| Completed | Assessment of the 90-day Mortality Risk Score After VATS Lobectomy NCT04799509 | Università degli Studi dell'Insubria | — |
| Completed | Implementation of a Patient Blood Management Program in Gastric Cancer Surgery NCT04286984 | Hospital Universitari de Bellvitge | — |
| Completed | Patterns and Outcomes of Neurosurgery in England Over a Five-year Period NCT05097066 | University of Leeds | — |
| Active Not Recruiting | Depth of Anaesthesia and Long-term Survival: The Balanced Anaesthesia Follow-up Study NCT04965324 | Auckland City Hospital | — |
| Unknown | Development and Validation of Models to Predict Postoperative Complications for Patients With Cardiac Surgery NCT04884841 | China National Center for Cardiovascular Diseases | — |
| Completed | Predictive Factors and Complications of Delirium NCT03246165 | University of Sao Paulo | — |
| Completed | Previous Abdominal Surgery and Obesity Does Not Affect Unfavorably the Outcome of Total Laparoscopic Hysterect NCT03738085 | Ankara University | — |
| Completed | Long-term Morbidity After Surgery for Perihilar Cholangiocarcinoma NCT03999593 | University of Liverpool | — |
| Active Not Recruiting | Quality of Life, Aesthetic Result and Health Economy in Breast Reconstruction NCT03963427 | Vastra Gotaland Region | N/A |
| Completed | Machine Learning-Based Risk Profile Classification of Patients Undergoing Elective Heart Valve Surgery NCT03724123 | Kepler University Hospital | — |
| Completed | S100B in Intensive Care Patients With and Without Traumatic Brain Injury NCT04501315 | University of Erlangen-Nürnberg Medical School | — |
| Completed | Bassini Inguinal Hernia Repair: Obsolete Or Still A Viable Surgical Option? NCT04888078 | Hunter Holmes Mcguire Veteran Affairs Medical Center | — |
| Completed | Outcomes of Resection at Different Times Between the End of Neoadjuvant Treatment and Surgery NCT04013347 | Campus Bio-Medico University | — |
| Completed | Validation of a Novel Frailty Index in Surgical Cohorts NCT03971851 | University of Iceland | — |
| Completed | Complications After Epilepsy Surgery NCT04727892 | First Affiliated Hospital Xi'an Jiaotong University | — |
| Completed | The Association of Marital Status With Kidney Cancer Surgery Morbidity NCT05526599 | Beijing Tsinghua Chang Gung Hospital | — |
| Completed | The Major Bleeding Risk Following Hepatectomy NCT04748081 | China Medical University Hospital | — |
| Completed | Radical Hysterectomy: Evolution Of Surgical Approach and Related Outcomes NCT03577613 | Hospital Universitari Vall d'Hebron Research Institute | — |