Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 74 for “"Intra-operative"”.
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Intra-operative Assessment of Breast Tumor Margins Using Diffuse Reflectance Spectroscopy
… close or positive surgical margin diagnosed post-operatively [3-11]. Histopathology is the current gold standard for determining surgical margin status; however, given the large volumes of resected breast tissue it is not feasible to section the entire specimen. High re-excision rates and limited …
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Which pre-operative findings translate to a positive intra-operative cholangiogram?
… The most common investigations used in the pre-operative diagnosis of choledocholithiasis are ultrasound and liver function tests (LFTs). These modalities have a low sensitivity for detecting common bile duct stones amongst the intermediate-risk groups. Aim: Identify pre-operative findings which …
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Intra-operative Prophylactic Pyloric Balloon Dilatation During Oesophagectomy to Prevent Early Delayed Gastric Emptying
Early delayed gastric emptying (DGE) occurs in 27% of patients undergoing an Oesophagectomy in University Hospital Plymouth (UHP) as per our local definition. It has a profound effect on patients’ recovery and may lead to anastomotic leak and pneumonia. Pyloric balloon dilatation (PBD) is a …
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Intra-operative optical monitoring of bowel tissue viability based on photoplethysmography and laser doppler flowmetry
… blood flow in abdominal surgery especially intraoperatively would be a valuable tool for prevention of a postoperative anastomosis complication (e.g. anastomotic leak, which is the main complication after colorectal resection). The development of a continuous method for monitoring perfusion …
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Validation of Monte Carlo-based calculations for small irregularly shaped intra-operative radiotherapy electron beams
… objective was to implement a Monte Carlo-based Intra-operative radiation therapy programme at the institution of the author.
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Development of in vivo Raman spectroscopy for the diagnosis of breast cancer and intra-operative margin assessment
… this research is the demonstration of accurate intra-operative margin status assessment during partial mastectomy surgeries.
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Comparative imaging of surgical small intestinal disease in dogs: evaluation of pre-operative contrast-enhanced ultrasound, intra-operative contrast-enhanced ultrasound, and triple-phase contrast-enhanced computed tomography
… practices. Failure to identify ischemic tissue intra-operatively can result in surgical dehiscence, require surgical revision, and lead to sepsis or death. Currently contrast-enhanced computed tomography (CT) is the standard of care for evaluating ischemic lesions of the bowel in humans. …
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Anxiety and it's management during awake procedures in operating theatres. A survey and randomised controlled trial.
This study investigates the prevalence of peri-operative anxiety and the effective management of intra-operative anxiety during awake surgery. Plastic and vascular surgical patients were selected for the study as many procedures performed within these specialities are performed under local or …
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Anastomotic leakage in rectal surgery: Where are we and where do we go from here?
… its prevention. We proposed the routine use of intra-operative endoscopy as a method of reducing the risk of anastomotic leak. This thesis explores current knowledge regarding anastomotic leaks, including the causes, prevention and management. We also present the findings from a feasibility …
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Does the Intra-operatively measured Leg Length Correction compare to the Post-operative radiograph in Total Hip Replacement surgery?
… compare the leg length correction (LLC) measured intra-operatively using the Vertical Measurement SystemTM (VMS) in total hip arthroplasty (THA), with the LLC measured on a 6-week post-operative Xray. We also wanted to quantify any residual leg length discrepancy (LLD) using this method. Patients …
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Target localization in MRI-guided prostate biopsy
… needle placements are often inaccurate due to intra-operative prostate motion and the lack of motion compensation techniques. As a result, malignant tumors can be missed, which in turn will lead to an increased number of repeated biopsies and delaying of treatment. To increase the needle …
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Localization of Human Pelvis Anatomical Coordinate System Using Ultrasound Registration to Statistical Shape Model
… anatomical coordinate system (PaCS) is to use intra-operative X-ray fluoroscopy in a specialized interventional radiology facility to guide the procedure. Employing intra-operative ultrasound (US) imaging fused with pre-operative CT scan or fluoroscopy imaging was proposed to eliminate the …
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Pelvic Positioning and Acetabular Orientation in Total Hip Replacement
… component orientations are observed on post-operative radiographs, despite the use of fixed intra-operative target angles. This work sought to answer the question of how pelvic orientation affects acetabular cup orientation in current practice and whether it can be accounted for without the …
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The relationship between preoperative hypertension and intraoperative haemodynamic changes known to be associated with postoperative morbidity
… is not consistently associated with postoperative cardiovascular morbidity and therefore not considered a major peri-operative risk factor. However, hypertension may predispose to peri-operative haemodynamic changes known to be associated with perioperative morbidity and mortality, such …
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Navigation with Local Sensors in Surgical Robotics
… and planning purposes. Additional information -- intra-process, spatial, current, and persistent sensor data -- is useful to cope with uncertainty, measurement errors, and incompleteness of data. Between global pre-operative navigation and control, this work introduces the concept of …
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3D Reconstruction of Patient Specific Bone Models for Image Guided Orthopaedic Surgery
… surgery. Existing research often focuses on intra-operative registration of the patients' anatomy with pre-operatively obtained 3D volumetric data (e.g. CT scans) utilising fiduciary markers. This expensive and invasive approach is not routinely available for diagnostics, and a majority of …
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A CBCT study of canalis sinuosus and its accessory canals in patients attending a South African dental hospital
… structure residing in this region. CS is an intra-osseous canal housing the anterior superior alveolar nerve (ASAN) and artery (ASAA). The terminal portion of CS frequently gives rise to discrete intra-osseous canals, termed accessory canals (AC), which descend to terminate in various …
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Feasibility of Spinal Neuronavigation and Evaluation of Registration and Application Error Modalities Using Optical Topographic Imaging
Intra-operative navigation began with the localization of subsurface structures in cranial neurosurgery using frame-based stereotaxy. Advances in imaging and computing power have led to the development of modern frameless three-dimensional (3D) computer-assisted navigation (CAN), employed across …
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Implementing an enhanced recovery after surgery protocol for adult surgical patients undergoing a gynecological oncology procedure
… protocol that guides recommendations for the pre-operative, intra-operative and postoperative phases of surgical care. ERAS protocols have been developed and applied to various surgical populations showing favorable outcomes including shorter length of hospital stay (LOS), a reduction in …
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