Clinical Research Directory

Deformable Tissue Modelling and Augmented Reality Based Guidance for Head and Neck Tumor Re-Resection Task

Head and neck cancers have one of the highest recurrence rates among solid malignancies, and recurrence is strongly correlated with overall survival. Reducing recurrence rates depends, in part, on the surgeon's ability to accurately re-resect areas of positive or close margins during surgery. Currently, margin status is communicated primarily through verbal descriptions between the surgeon and pathologist, which can be imprecise. This challenge is further compounded by the deformable nature of soft tissues, as once the specimen is resected, the shape and size of the specimen change, making it difficult to accurately map the specimen's margins back onto the surgical site. Emerging technologies -such as augmented reality (AR), 3D scanning, and advanced soft tissue modeling- offer promising solutions for improving surgical navigation and precision. Building on these advances, an AR-based surgical navigation system was developed specifically for head and neck tumor resections. The system uses a 3D scanner to generate virtual models of both the resected specimen and the patient's surgical site, as demonstrated in prior work. A soft tissue modeling algorithm is then applied to account for specimen shrinkage and deformation, enabling accurate tracking of positive tumor margins. This guidance information is visualized through an AR headset, which overlays the margin data directly onto the patient's surgical site, providing surgeons with real-time visual guidance during re-resection. In this study, the goal is to evaluate the benefits and usability of this novel navigation software, compared to the standard of care. By assessing surgeon performance and user experience in cadaveric tasks with and without the AR system to identify strengths, limitations, and opportunities for refinement of the system, ultimately advancing surgical precision and improving patient outcomes by reducing recurrence rates.

Implementation of Clinical Nutrition Practice Guidelines in Surgical ICUs

The goal of this interventional clinical trial is to evaluate whether the implementation of an evidence-based, context-adapted clinical nutrition practice guideline can improve clinical nutrition management in surgical intensive care units (ICUs) in China. The guideline is selected based on the best available evidence from existing surgical and critical care nutrition guidelines, adapted to the Chinese healthcare context, and implemented using an i-PARIHS-guided translation strategy. The trial involves ICU healthcare professionals working in surgical ICUs of tertiary general hospitals, while assessing nutrition-related clinical outcomes among surgical critically ill patients. The main questions it aims to answer are: Does guideline implementation improve ICU healthcare professionals' adherence to recommended clinical nutrition practice guidelines? Does the implementation of the clinical nutrition practice guideline improve the proportion of surgical critically ill patients who achieve recommended energy and protein intake targets during ICU stay? Researchers will compare outcomes before and after guideline implementation to determine whether the i-PARIHS-guided guideline translation improves nutrition management processes, healthcare professional performance, and patient-related clinical outcomes. Participants will: Complete baseline and post-implementation assessments related to clinical nutrition knowledge, attitudes, and practices. Participate in guideline-based education, training, and implementation activities guided by the i-PARIHS framework. Apply the adapted clinical nutrition practice guideline during routine clinical care in surgical ICUs. Be evaluated through on-site audits, questionnaires, and clinical data collection during the implementation process.

National Registry of Surgical Treatment and Percutaneous Cryoablation of Parietal Endometriosis

National multicentric registry of a cohort of patient with suffering parietal endometriosis, carried out by a multidisciplinary radiosurgery team

Ultrasound Guided Versus Surgical Rectus Sheath Block Versus Local Anesthesia Infiltration for Postoperative Analgesia in Patients Undergoing Total Abdominal Hysterectomy

The aim of this work is to compare the efficacy and safety of the effectiveness and safety of ultrasound-guided surgical rectus sheath block and local anesthetic infiltration for postoperative analgesia in patients undergoing total abdominal hysterectomy.