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Clinical Research Directory

Browse clinical research sites, groups, and studies.

398 clinical studies listed.

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Surgery

Tundra lists 398 Surgery clinical trials. Each listing includes eligibility criteria, study locations, and direct links to research sites in the Tundra directory.

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RECRUITING

NCT05722002

Comparing Analgesic Regimen Effectiveness and Safety for Surgery (CARES) Trial

This trial is being completed to compare two commonly used options to treat pain after surgery. Participants that undergo gallbladder removal, hernia repair, and breast lump removal will be eligible to enroll. Eligible participants will be randomized to 1 of 2 groups of medications (Non-Steroidal Anti-Inflammatory Drugs (NSAIDS) plus acetaminophen or low dose opioids plus acetaminophen). It is anticipated that the NSAID group will have superior clinical outcomes and fewer side effects when compared to the opioid group.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-28

6 states

Surgery
Pain, Postoperative
RECRUITING

NCT07223853

AI-driven Clinical Decision Support for Perioperative Blood Orders

20 million patients have surgery in the United States every year, with approximately 1 million of those patients requiring life-saving blood transfusion. Presurgical preparation for transfusion is important to allow for safe and timely transfusion during surgery; however, excessive preparation is unfortunately common, costly, and contributes to blood waste. This study aims to evaluate an intelligent clinical decision support system that helps clinicians prepare blood for patients who are likely to need it, while avoiding excessive preparation for patients who don't, potentially improving patient safety while reducing blood waste and healthcare costs.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-27

1 state

Surgery
RECRUITING

NCT07707401

Effectiveness of WeChat-Supported Neck Rehabilitation Exercises on Early Recovery After Thyroidectomy

This study aimed to evaluate the effectiveness, safety, and implementation outcomes of a WeChat mini program-supported tele-neck rehabilitation exercises for improving early postoperative neck recovery after thyroidectomy.

Gender: All

Ages: 18 Years - 60 Years

Updated: 2026-08-27

1 state

Thyroid Diseases
Thyroid Cancer
Surgery
+1
NOT YET RECRUITING

NCT07720089

Developing Pilot Postoperative Guidelines for Improved Functional Outcomes After High-Risk Cancer Surgery

The objective of this study is to develop and evaluate the implementation of novel timeline-specific National Comprehensive Cancer Network (NCCN)-style clinical guidelines designed to improve functional outcomes after high-risk abdominal surgery for cancer.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-26

1 state

Cancer
Abdominal Cancer Surgery
Surgery
+2
COMPLETED

NCT05258825

Preoperative Monoferric for Abdominal Surgery

Although there are multiple formulations of intravenous (IV) iron to choose from, a one-time dose of Monoferric would make it more feasible to integrate it in the perioperative pathway given an often-limited time between preoperative evaluation and surgery date. Furthermore, the one-dose total iron repletion model can offer health economic benefits through reducing red blood cell (RBC) transfusion applying limited resources to establish a perioperative anemia management pathway. Prior studies have described a model that can be used as a baseline which showed cost-savings and outlined each cost component. So far, no US-based approach applying this model has been published. Hypothesis: Administration of a one-time dose of IV iron to patients with preoperative iron deficiency anemia scheduled to undergo elective abdominal and/or pelvic surgery is feasible. It will result in an increase in preoperative hemoglobin from baseline, and improvement in clinical outcomes. Aim 1: Determine the change in hemoglobin from baseline after the administration of 1000mg single dose IV iron 3-4 weeks before elective surgery The investigators hypothesize that there will be an increase in hemoglobin levels by 1g/dL by the day of surgery. Aim 2: Explore the association of IV iron administration on other clinical outcomes including: complications, transfusion of blood products and length of hospital stay. The investigators hypothesize that there will be a decrease in adverse complications and requirement for transfusion, and shorter hospital stay Aim 3: Describe the feasibility and process, infrastructure and workflows required to implement an IV iron infusion program

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-26

1 state

Anemia
Surgery
ACTIVE NOT RECRUITING

NCT05560815

Epidemiology of Perioperative Care in Sweden

The Epidemiology of Perioperative Care in Sweden (EPeCS) study is a registry-based, retrospective extensive analysis of the whole adult (≥18 years) surgical population in Sweden during six full years, 1 January 2015 - 31 December 2020. Patients are retrieved from the Swedish Perioperative Registry (SPOR) which has full national coverage of public healthcare. The study aspire to integrate pre-, peri- and postoperative components of the whole perioperative process as well as process, patient, anaesthesia and surgical factors. This allows for careful risk-adjustment and is a major strength of the project. This will require cross-matching data from several national quality registries. EPeCS will serve as a database to be used as the foundation for several substudies that are to be conducted (10 at the present moment). Specific study focuses and aims are described in the "Detailed Description" section below. The present study aims to provide a comprehensive audit of the surgical population in Sweden, and to identify factors that are of importance for outcome. The investigators aim to identify factors that will allow a better prediction of outcome, if they are modifiable, and if they are different for different lengths of follow-up. The ultimate goal is to provide hypotheses for directed therapies (eg. different types of anaesthesia), processes (eg. designated around-the-clock hip-fracture surgical teams), postoperative care (eg. extended PACU care instead of intensive care) in order to decrease suffering and increase cost-efficacy in Swedish healthcare.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-26

1 state

Surgery
NOT YET RECRUITING

NCT07785076

SurgWeek-2: Identifying the Global Burden of Post Operative Complications: an International Prospective Cohort Study Protocol

This study aims to assess and improve the global outcomes following surgery. Every year approximately 313 million operations are performed, with 50 million people experiencing a complication and unfortunately 3.5 million people will die following these operations. This study will assess how outcomes vary following surgery throughout the world and explore system access, quality and efficiency. The secondary aims of this study are to (1) assess the use of antibiotics and the impact of resistant organisms globally, (2) assess who dies after an operation and whether there are factors that were identified that could have prevented the death, (3) assess the assess and outcomes to minimally invasive and robotic surgery, (4) assess the outcomes of the Bellwether procedures (laparotomy, caesarean delivery, open fracture management) as these are conditions used to assess the functioning of a health system. The study will take place for six week in May-June 2026 and will aim to collect data from 100,000 patients across 1000 hospitals in 100 countries to give a global perspective on the above outcome measures. The data will be analysed by hospital income group to understand how resources impact on outcomes. By combining global data on clinical outcomes with information on hospital resources, this study hopes to provide valuable insights into how to improve surgical care across diverse settings, making recommendations that lead to better access to safe, timely and affordable care for surgical problems worldwide.

Gender: All

Updated: 2026-08-25

Surgery Complications
Surgery
Global Surgery
+8
NOT YET RECRUITING

NCT07076641

Efficacy and Safety of Intravenous Lidocaine Versus Placebo in Patients Receiving Morphine-rachi Analgesia

The purpose of this study is to evaluate the superiority of IV lidocaine combined with morphine spinal anesthesia versus placebo combined with morphine spinal anesthesia, in reducing postoperative morphine consumption at 48 hours, in patients undergoing major digestive or abdominal surgery by laparotomy.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-25

Digestive System Disease
Surgery
RECRUITING

NCT06232876

Continuous Versus Intermittent Ward Monitoring

The investigators will randomize adults having major non-cardiac inpatient surgery to blinded versus unblinded continuous postoperative vital sign monitoring (saturation, ventilation, and heart rate). The investigators will use a wearable, untethered, and battery-powered sensor (Masimo Radius PPG, Masimo, Irvine, CA) that wirelessly connects to a Masimo monitor and continuously records saturation, ventilation, and pulse rate. The primary outcome will be areas-exceeding-thresholds for desaturation (\<85%), bradypnea (\<7 breaths/min), tachypnea (\>30 breaths/min), tachycardia (heart rate \>130 beats/min), and bradycardia (heart rate \<45 beats/min). These exposure thresholds represent a balance between events that are clinically meaningful and excessive alarms that will discourage clinician participation. The investigators expect about 1 alert per patient per day with these thresholds, with most being considered informative or actionable by nurses. In unblinded patients, clinician alerts will be activated at these thresholds.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-24

1 state

Surgery
RECRUITING

NCT05148494

TES RCT Fleet Enema vs Oral Mechanical Bowel Prep

There is no consensus about the best bowel preparation prior to transanal endoscopic surgery TES). Cleanliness and visibility in the rectosigmoid and rectum are of utmost importance, possibly even more so than during colonoscopy, to facilitate safe, precise and efficient resection of the rectal lesion and potentially adequate closure of the defect. Both Fleet enemas and oral mechanical bowel preparation are considered standard of care in preparation for TES. This single center two arm single blinded randomized controlled trial will compare the effectiveness of Fleet enemas in comparison to Pico Salax oral mechanical bowel preparation in cleansing the rectum as measured by a modified version of the Ottawa Bowel Prep Scale.

Gender: All

Ages: 18 Years - 75 Years

Updated: 2026-08-21

1 state

Colorectal Neoplasms
Surgery
ACTIVE NOT RECRUITING

NCT06213454

Transversus Abdominis Plane Block Compared to Local Anesthetic Wound Infiltration in Gynecologic Oncology Surgery

This study is being done to see if preoperative transversus abdominis plane (TAP) analgesia will provide similar postoperative pain control, hospital length of stay, and postoperative outcomes compared to surgeon-initiated wound infiltration with local anesthetic in participants undergoing laparotomy for gynecologic indications.

Gender: FEMALE

Ages: 18 Years - Any

Updated: 2026-08-20

1 state

Analgesia
Surgery
RECRUITING

NCT07151417

Use of Corticosteroid in Intraopertive Injections in Total Knee Replacement Surgery.

The goal of this clinical trial is to find out which type of steroid medicine, when added to a standard pain-control injection during total knee replacement surgery, works best at reducing pain, limiting opioid use, and improving recovery in adults undergoing surgery for severe knee arthritis or injury. The main questions it aims to answer are: Does adding a steroid to the injection improve pain control and reduce opioid use after surgery? Is the newer extended-release steroid (Zilretta) more effective and safer-especially for patients with diabetes-than the traditional steroid (methylprednisolone)? Researchers will compare: Standard pain-control injection alone Standard injection plus methylprednisolone Standard injection plus Zilretta to see which option provides better pain relief, less opioid use, and improved knee function. (Patients with diabetes or prediabetes will only be in the standard injection or Zilretta groups so researchers can study whether Zilretta is safer for blood sugar control.) Participants will: Be randomly assigned to one of the study groups during their total knee replacement surgery Receive the assigned pain-control injection around the knee joint Be followed after surgery to measure: Pain levels Opioid pain medication use Knee movement (range of motion) Whether another procedure (such as manipulation under anesthesia) is needed if the knee becomes too stiff Patient-reported outcome surveys about pain and function

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-19

1 state

Knee Osteoarthritis
Musculoskeletal Disease
Surgery
ACTIVE NOT RECRUITING

NCT05776758

Role of NAC in cT0 Muscle-invasive Bladder Cancer After Maximal TURBt

This prospective randomized controlled trial (RCT) is designed to provide high level evidence describing the non-inferiority of radical cystectomy (RC) alone versus neoadjuvant chemotherapy (NAC) plus RC on survival outcomes of patients with a diagnostic transurethral resection of bladder tumor (TURBt) of non-metastatic muscle invasive bladder cancer (MIBC) (T2-T4 N0 M0) and non-radiologic or endoscopic residual tumor after a maximal TURBt (cT0). Our hypothesis is that performing NAC in the absence of residual disease, after a maximal TURBt, has no survival benefit over performing an early cystectomy. Since no downstaging could be achieved in patients with no residual tumor into the bladder, the benefits of neoadjuvant chemotherapy in this setting could be not significant and it might turn into unnecessary toxicity and a substantial delay to surgical treatment.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-17

Muscle-Invasive Bladder Carcinoma
Chemotherapy Effect
Surgery
RECRUITING

NCT06038240

Optimizing Pain Self-Management in Total Knee Arthroplasty

The purpose of this study is to investigate the efficacy of a positive affect enhancing intervention designed to reduce pain and augment reward system function in knee osteoarthritis (KOA) patients undergoing total knee arthroplasty (TKA). The scientific premise is that patient use of a positive emotion generative practice - savoring meditation, which has been demonstrated to reduce pain in experimental laboratory settings, enhanced with a pain neuroscience education component about reward system dysfunction as a chronic pain mechanism - is optimally suited to reduce postsurgical pain and augment reward system functioning relative to a Pain Self-Management and Education (PSME) condition. We will randomize 150 patients with KOA undergoing unilateral TKA to a brief, 4-session (20-30 minutes each) course of Savoring Meditation (SM; n = 75) or PSME (n = 75) delivered remotely by trained interventionists in a one-on-one format. We will assess pain and as well as pain-related risk and protective factors both via questionnaire and via weeklong ecological momentary assessment (EMA) data bursts on the following schedule: baseline, post-surgery, and 3-month follow-up. In addition, participants will attend laboratory testing sessions at baseline and 6-weeks post-surgery, during which affective pain modulation and electroencephalographic (EEG) brain biomarkers associated with pain and affect will be recorded. Participants in SM be encouraged to practice their savoring for 5 minutes/day during the week following surgery, as well as to use it to manage pain flares in a self-directed manner.

Gender: All

Ages: 18 Years - 85 Years

Updated: 2026-08-17

1 state

Osteo Arthritis Knee
Knee Pain Chronic
Surgery
COMPLETED

NCT06619730

Brain Function Monitoring During Surgery

The purpose of this research is to gather information on the effectiveness of the Sedline Brain Function Monitor, and its use in this study to determine whether monitoring the brain activity during anesthesia will improve recovery, including earlier discharge and less side effects. Furthermore, the study team wants to determine whether males and females respond to anesthetics in a similar manner with and without brain monitoring.

Gender: All

Ages: 18 Years - 45 Years

Updated: 2026-08-12

1 state

Surgery
TERMINATED

NCT07081828

The Asensus Paediatric Robotic Registry

An open-label, observational, paediatric registry trial in which participating centers enroll subjects who had or will have a laparoscopically-assisted surgery using the Senhance Surgical System.

Gender: All

Ages: Any - 17 Years

Updated: 2026-08-12

Surgery
Surgery in Early Childhood
TERMINATED

NCT03385109

The TransEnterix European Patient Registry

An open label observational registry trial in which participating centers enroll subjects who had or will have a laparoscopically assisted surgery using the Senhance Surgical System.

Gender: All

Ages: 18 Years - 80 Years

Updated: 2026-08-12

Surgery
RECRUITING

NCT03274050

To Evaluate the Performance and Efficiency of Robotic Surgery in Children and Adults

Robotic minimally invasive surgery has been rapidly adopted for a wide variety of surgical procedures in adult patients across a broad spectrum of surgical specialties. This has occurred despite the high costs and uncertain benefits of surgical robots. In contrast, Children's Hospitals and pediatric surgical disciplines have been much slower to embrace the surgical robot. Many children's hospitals do not even possess a surgical robot, and many of those that do borrow them from the adult operating room within the same medical facility. Since the first case of robotic minimally invasive surgery in children in 2000, robotic procedures have been slowly adopted by select pediatric surgical specialists. Advocates of robotic minimally invasive surgical systems add many useful features that include improved dexterity, motion scaling, tremor filtration, greater optical magnification (up to 10x), stereoscopic vision, operator-controlled camera movement, and the elimination of the fulcrum effect when compared to conventional laparoscopy. The wristed laparoscopic instruments used in robotic surgery provide seven degrees of freedom. For the surgeon, these features may allow for more precise dissection with increased magnification and visibility. The intuitive controls of the robot are purported as providing the ability to perform laparoscopic procedures in an "open" fashion. In pediatric surgical procedures, these technical abilities may have the potential to surpass the physical capabilities of human performance in the tight operative fields encountered in children. This study aims to evaluate the clinical safety, effectiveness, and cost-effectiveness of robot-assisted minimally invasive surgery in both pediatric and adult patients. Robotic surgery was developed to overcome key limitations of conventional laparoscopy, including 2D visualization, limited instrument mobility, poor ergonomics, and long learning curves. The trial will assess clinical outcomes, postoperative pain, length of stay, return to daily activities, access to minimally invasive surgery, and the impact of robotic surgery on surgical training. Specific indications, such as pyeloplasty, will also be compared with open and conventional laparoscopic approaches.

Gender: All

Updated: 2026-08-10

1 state

Surgery
RECRUITING

NCT07736092

Perioperative Transcranial Photobiomodulation and Delayed Neurocognitive Recovery in Older Patients

Delayed neurocognitive recovery is a common neurocognitive complication in older patients after surgery, especially those with preoperative neurocognitive decline. Transcranial photobiomodulation therapy is a novel neuromodulation technique using transcranial low-power light to modulate brain biological functions. This technique has been used to treat various neurological or psychiatric conditions, including ischemic stroke, traumatic brain injury, and major depression. This study is designed to explore whether using transcranial photobiomodulation therapy during the perioperative period can reduce the incidence of delayed neurocognitive recovery in older patients with pre-existing neurocognitive impairment.

Gender: All

Ages: 65 Years - Any

Updated: 2026-08-10

1 state

Older Adults
Surgery
Transcranial Photobiomodulation
+2
RECRUITING

NCT04216927

NO During CPB in Neonates to Reduce Risk of AKI

Acute kidney injury (AKI) following cardiac surgery for congenital heart defects (CHD) in children affects up to 60% of high risk-patients and is a major cause of both short- and long-term morbidity and mortality. Despite effort, to date, no successful therapeutic agent has gained widespread success in preventing this postoperative decline in renal function. Nitric oxide is an intricate regulator of acute inflammation and coagulation and is a potent vasodilator. The investigators hypothesize that nitric oxide, administered during cardiopulmonary bypass (CPB), may reduce the incidence of AKI.

Gender: All

Ages: 1 Day - 31 Days

Updated: 2026-08-05

1 state

AKI
CHD - Congenital Heart Disease
Surgery
ACTIVE NOT RECRUITING

NCT03567538

National Register Studies in Thoracic Surgery

The overall project aim is to study risk and outcomes following thoracic surgery by cross-linking high-quality national Swedish health-data registers for population-based investigations of individual level clinically relevant patient data.

Gender: All

Ages: 18 Years - 110 Years

Updated: 2026-08-05

Lung Cancer
Pulmonary Metastasis
Surgery
NOT YET RECRUITING

NCT07653594

TRANScriptional Pathways Of Surgical Pain Modulated by Music Therapy Exposure (TRANSPOSE)

Participants may take part in this study if they are scheduled to undergo a surgery that meets the following: (1) traditional open surgery via laparotomy, (2) length of surgery \>3 hours, and (3) curative-intent surgical resection of a cancer in the stomach, pancreas, bile ducts, liver, or peritoneal surfaces. The purpose of this study is (1) to evaluate the feasibility of collecting blood samples prior to surgery, post-surgery and pre- music-assisted relaxation and imagery (MARI) intervention, and immediately post-MARI intervention and (2) to identify gene expression changes associated with MARI and explore their relationship with immediate changes in pain intensity. Participants will be in this study for the duration of their hospital admission for surgery.

Gender: All

Ages: 50 Years - 80 Years

Updated: 2026-08-05

1 state

Surgery
Stomach Cancer
Pancreas Cancer
+3
COMPLETED

NCT06502184

Mental Health Outcome After Surgery for Obstructed Defecation Syndrome (ODS)

Background: Obstructed Defecation Synsdrome (ODS) causes people to strain and sometimes need help to go to the toilet. They think about going to the toilet a lot, which makes their lives worse. People with Obstructed Defecation Synsdrome (ODS) are more likely to be anxious and depressed than people with other illnesses. Aim of the study: This study looked at how mental health affects Obstructed Defecation Synsdrome (ODS) patients before and after surgery.

Gender: All

Ages: 18 Years - Any

Updated: 2026-08-04

Surgery
Obstructive Defecation Syndrome
Mental Health Issue
+2
COMPLETED

NCT06174701

Building Resilience for Surgical Recovery

The goal of this clinical trial is to test problem solving therapy (PST) in older adults who are undergoing major surgery. The main question it aims to answer is: What is the feasibility and acceptability of delivering PST to older surgical patients with depressive symptoms or report lacking social support in the pre-operative and post-operative setting?

Gender: All

Ages: 65 Years - Any

Updated: 2026-08-03

1 state

Psychosocial Functioning
Surgery
Older Adults
+3