1. Articles in category: Clinical Trials

    1-24 of 646 1 2 3 4 ... 25 26 27 »
    1. Correlating the Measure of Retinal Vascular Density Through Angio-OCT With Calcium Score

      Correlating the Measure of Retinal Vascular Density Through Angio-OCT With Calcium Score

      Recent case-control studies have proven that the retinal vascularization mirrors the cardiac vascularization: more the coronary network is altered, more the density of retinal vessels is reduced. No studies have yet been realised in primary prevention. Our study aims to demonstrate a link between the density of the retinal vascularization and the calcium score, which is currently the gold standard for the classification of cardiovascular risk in primary prevention. Thus, a simple image of the retinal vascularization could predict the cardiovascular risk of a patient. OCT angiography would become a major aid in the classification of cardiovascular risk in asymptomatic ...

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    2. Ophthalmologic Outcomes in Patients With Carotid Artery Stenosis

      Ophthalmologic Outcomes in Patients With Carotid Artery Stenosis

      The retinal vessels have been shown to reflect vascular changes inherent to systemic pathologies, even when no ocular disease is identified. As such, the eye's vasculature is ableto serve as a window to the vascular health of the human body and a means of assessing systemic endothelial function. Optical coherence tomography angiography (OCTA) employs optical means to image all the retinal vascular layers and the choroid, providing an extremely detailed image of the microvascular network in a fast, reproducible and totally non-invasive way. As such, it is currently the best non-invasive way of having an image of human capillaries ...

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    3. Validation of Interleukins and Other Cytokines Together With OCT Imaging for Rapid Infectious Keratitis Assessment

      Validation of Interleukins and Other Cytokines Together With OCT Imaging for Rapid Infectious Keratitis Assessment

      As conventional corneal scraping with bacterial culturing has several disadvantages such as long duration until diagnosis, invasiveness and lacks alternatives, there is demand for a novel non-invasive, rapid test in keratitis management. First aim of this study will be to evaluate the influence of TNF-alpha on Gram+ and Gram- bacteria causing keratitis. Second aim of this study will be to develop an algorithm, that should help to distinguish between different pathogens causing keratitis.

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    4. Prevention of Onset and Transition to an Advanced Form of Diabetic Retinopathy in Children

      Prevention of Onset and Transition to an Advanced Form of Diabetic Retinopathy in Children

      Diabetic retinopathy, or damage to the retina caused by diabetes, is one of the most common complications in all patients with newly diagnosed diabetes mellitus of both types. These are mainly pathological changes affecting the vascular supply of the retina, which precede changes affecting the peripheral nervous system. Children and in general patients with type I diabetes mellitus are around 0.6% of the population in the long term. the first changes in the retinal vessels can usually be expected after 2-5 years from the first detection of the disease. These changes are diagnosed using a biomicroscopic examination of the ...

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    5. Structural Description of Skin Biopsies With Dynamic Full-field Optical Coherence Tomography on Suspected Basal Cell Carcinoma Lesions, a Pilot Study (DOCTOBA)

      Structural Description of Skin Biopsies With Dynamic Full-field Optical Coherence Tomography on Suspected Basal Cell Carcinoma Lesions, a Pilot Study (DOCTOBA)

      Basal cell carcinoma (BCC) are the most frequent skin cancers. Their incidence is constantly increasing. BCC diagnosis is first clinically suspected and then confirmed following histological examination of either a skin biopsy or the excisional specimen. Surgery is the first-line treatment and some procedures (notably Mohs surgery) require extemporaneous histological analysis of the edges to ensure a complete excision. Such on-site histopathological examination can be time consuming and associated with decreased sensitivity. Skin imaging techniques have already been tested to overcome these limitations and seem promising. Although some of them - such as confocal microscopy - are already even used in vivo ...

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    6. Treatment of Functionally Non-significant Vulnerable Plaques in Patients With Multivessel ST-elevation Myocardial Infarction The VULNERABLE Randomized Trial

      Treatment of Functionally Non-significant Vulnerable Plaques in Patients With Multivessel ST-elevation Myocardial Infarction The VULNERABLE Randomized Trial

      The study aims to compare a preventive percutaneous coronary intervention (PCI) plus optimal medical treatment (OMT) strategy vs. OMT for treatment of non-functionally significant non-culprit lesions presenting with optical coherence tomography (OCT) findings indicative of vulnerable plaque, in patients with ST-elevation myocardial infarction (STEMI) and multivessel disease.

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      Mentions: Abbott
    7. Feasibility and Safety of Hybrid IVUS-OCT System

      Feasibility and Safety of Hybrid IVUS-OCT System

      Intravascular ultrasound (IVUS) and optical coherence tomography (OCT) were all recommended for percutaneous coronary intervention (PCI) optimization in the latest guidelines, however, which imaging modality was more suitable as either a diagnostic or guidance tool was still unknown. Recently, a novel, well-designed hybrid imaging system was approved for clinical use, allowing the accurate co-registration of two imaging modalities and immediate, simultaneous image review. For testing each modality in the hybrid imaging system, the investigators conducted this prospective, multicentre, non-inferiority trial. In this study, all participants achieved hybrid IVUS-OCT imaging after stenting, at meanwhile, patients randomly assigned to the IVUS arm ...

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    8. Added Value of OCT for Diagnosing Recurrent BCC After Non-invasive Treatment

      Added Value of OCT for Diagnosing Recurrent BCC After Non-invasive Treatment

      Superficial basal cell carcinoma (sBCC) can be treated non-invasively, but follow-up is necessary because lesions can reoccur. This study aims to evaluate the additional value of optical coherence tomography (OCT) for the detection of recurrent BCC lesions, that may remain unrecognized by clinical and dermoscopic examination (CDE). This study compared the diagnostic accuracy of CDE and CDE combined with OCT for detection of recurrent basal cell carcinoma (BCC) after non-invasive treatment of sBCC.

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    9. Prediction of Progression of Retinal Ischemia in Diabetes

      Prediction of Progression of Retinal Ischemia in Diabetes

      x Diabetes Mellitus (DM) is a major public health problem with significant socioeconomic implications due to its increased prevalence. Diabetic retinopathy (DR) is the most frequent complication in DM patients and remains the leading cause of legal blindness in working-age populations (Yau et al., 2012). Differentiating patients with higher vs low risk of progression to vision-threatening complications is of paramount importance for an efficient managing of the disease to prevent vision disability. PREDICTION is a longitudinal prospective clinical study in DMT2 patients with a higher risk of progression to explore possible imaging, functional and systemic biomarkers of progression, using non-invasive ...

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    10. Optical Coherence Tomography Angiography (OCTA) to Assess Cardiac Output and Cerebral Perfusion at the Time of Children's Cardiac Surgery

      Optical Coherence Tomography Angiography (OCTA) to Assess Cardiac Output and Cerebral Perfusion at the Time of Children's Cardiac Surgery

      Around 3500 children including 1,000 babies a year in the UK require heart surgery. Open-heart repairs involve the heart being stopped, while blood is pumped around the body using a cardiopulmonary bypass machine. Following complex operations, the patient may temporarily develop poor heart function, leading to reduced organ blood supply. Low heart output leads to post-operative complications or even death. The current methods to assess cardiac output and to see if vital organs, especially the brain, are receiving enough blood flow, are indirect and can be inaccurate. If we find a better way to detect and then avert or ...

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    11. Subthreshold Nanosecond Laser for Non-resolving Central Serous Chorioretinopathy: A Double-masked Sham-controlled Randomised Trial

      Subthreshold Nanosecond Laser for Non-resolving Central Serous Chorioretinopathy: A Double-masked Sham-controlled Randomised Trial

      This is a prospective, multicentre, sham-controlled, participant- and assessor-masked superiority trial with two parallel treatment arms which aims to investigate the safety and efficacy of subthreshold nanosecond laser (SNL) in a series of adults with sub-retinal fluid secondary to non-resolving central serous chorioretinopathy (CSCR) by visual and anatomical outcomes. The study population will be individuals with adults (aged 18-70 years inclusive) with non-resolving CSCR (defined as CSCR present for a duration of more than 3 months presenting with either focal or diffuse leakage) who meet all eligibility criteria. 60 subjects total will be enrolled into the study - 40 randomized to ...

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    12. Multimodal Equipment for Teleophthalmology Assessment (META)

      Multimodal Equipment for Teleophthalmology Assessment (META)

      We have developed a Multimodal Equipment for Teleophthalmology Assessment (META) device. This novel device is compact, portable and suitable for packaging and express delivery. With this device, there is a potential to implement a new concept of "hospital-at-home" eye care model. The present study is designed to validate the META device for future clinical usage and investigation. We will compare the performance of the META device with those provided by commercial devices in terms of image quality of optical coherence tomography (OCT), anterior segment and fundus camera, and evaluate the level of agreement in lesion detection and quantitative measurements between ...

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    13. Comparison of Results Achieved by Different Ballooning Techniques in Bifurcation Stenting

      Comparison of Results Achieved by Different Ballooning Techniques in Bifurcation Stenting

      Single-stent strategy with provisional approach represents the gold standard for percutaneous coronary intervention of bifurcation lesions, and, according to European Bifurcation Club, performing provisional approach presents two steps considered as mandatory: "crossover stenting" in main vessel (MV) and subsequent post-dilation or "POT" (proximal optimization technique). While consensus exists regarding these first two steps, the exact optimal following sequence in case of side branch (SB) jeopardize after main vessel stenting is still a matter of debate. Actually, the two most used techniques in this setting are represented by the simultaneous inflation of two balloons located respectively in the MV and SB ...

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    14. Imaging Retinal Vasculature in Infant Eyes

      Imaging Retinal Vasculature in Infant Eyes

      Retinopathy of prematurity is a leading cause of childhood blindness worldwide. The fovea, a critical location in the retina determining visual acuity and visual function, and the blood vessels around it, are abnormally developed in infants with retinopathy of prematurity. However, how these blood vessels form during development of the human fovea remains unclear. This research will advance our understanding of the fundamental knowledge of how the blood vessels around the fovea form in infants, and how they change in diseased states such as preterm birth or retinopathy of prematurity.

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    15. Optical Coherence Tomography for Intracranial Atherosclerotic Stenosis

      Optical Coherence Tomography for Intracranial Atherosclerotic Stenosis

      Stroke was the second leading cause of death worldwide and the leading cause of death in China in 2017. ICAS accounted for 10% to 15% of ischemic stroke in Western countries, and as much as 46.6%in Asia in 2009. For patients with ICAS, the risk of stroke is highly related to the histopathology of atheromatous plaques. Therefore, characterizing the morphology and composition of plaques in ICAS may help to predict the risk of stroke occurrence and allow the adoption of preventive or therapeutic management to prevent such life-threatening events. OCT, with a resolution of 10μm, may provide ...

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    16. Assessment Of Diabetic Maculopathy Changes After Phacoemulsification by Using Optical Coherence Tomography

      Assessment Of Diabetic Maculopathy Changes After Phacoemulsification by Using Optical Coherence Tomography

      Diabetic patients pose a particular challenge because of the tendency for early formation of cataract in them and propensity to develop macular edema after cataract surgery. Macular edema (ME) is a major cause of vision loss after cataract surgery in patients with diabetes . Macular edema is a common cause of unfavorable visual outcome after cataract surgery. Clinically significant cystoid macular edema (CSME) has a reported incidence of 1% to 2% after cataract surgery. Diabetes has been associated with an increased incidence of postoperative macular edema. The incidence of macular edema on optical coherence tomography (OCT) was 22% in diabetic eyes ...

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    17. Intraoperative OCT Guidance of Intraocular Surgery (MIOCT)

      Intraoperative OCT Guidance of Intraocular Surgery (MIOCT)

      Optical Coherence Tomography (OCT) is used to capture reproducible ocular morphology and cross-sectional tissue measurements in-vivo in a rapid, non-invasive, non-contact manner. It has displaced ophthalmoscopy and stereo photography for clinical assessment and documentation of retinal microanatomy including thickness, cystoid structures, subretinal fluid and retinal traction.(1) Spectral Domain Optical Coherence Tomography (SDOCT) has the speed and resolution required for real-time noninvasive three-dimensional imaging of critical pathology. While modern ophthalmic surgery has benefited from rapid advances in instrumentation and techniques (2-6), the basic principles of the stereo zoom operating microscope have not changed (except for increased automation) since the 1930 ...

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    18. PREcise Percutaneous Coronary Intervention for Stent OptimizatION in Treatment of COMPLEX Lesion (PRECISION-COMPLEX)

      PREcise Percutaneous Coronary Intervention for Stent OptimizatION in Treatment of COMPLEX Lesion (PRECISION-COMPLEX)

      There has been ample evidence of the role of intracoronary imaging for optimizing the stent, especially among the patients with complex coronary lesions. Intracoronary imaging can be used during the entire process of percutaneous coronary intervention (PCI), from pre-PCI to post-PCI stages. Notably, approximately 15-20% of patients who underwent angiographically successful PCI showed significant stent underexpansion, malapposition, intra-stent thrombus formation, and edge dissection on intracoronary imaging studies, including optical coherence tomography (OCT). Meanwhile, the role of pre-interventional fractional flow reserve (FFR) measurement has been well established and recommended by recent guideline. However, although previous studies evaluated the efficacy and safety ...

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    19. OCT Evaluates the Effects of CTEPH Treated by Scoring Balloon

      OCT Evaluates the Effects of CTEPH Treated by Scoring Balloon

      Chronic thromboembolic pulmonary hypertension (CTEPH) is a disease of obstructive pulmonary artery remodelling as a consequence of major vessel thromboembolism. The diagnosis of CTEPH is based on findings obtained after at least 3 months of effective anticoagulation in order to discriminate this condition from subacute PE. These findings are mean pulmonary artery pressure ≥25mmHg with pulmonary artery wedge pressure ≤15 mmHg, mismatched perfusion defects on lung scan and specific diagnostic signs for CTEPH seen by multidetector CT angiography, MR imaging or conventional pulmonary cineangiography, such as ring-like stenoses, webs/slits and chronic total occlusions (pouch lesions or tapered lesions). Balloon ...

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    1-24 of 646 1 2 3 4 ... 25 26 27 »
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