Clinical Trials

Physiology-guided vs Angiography-guided Non-culprit Lesion Complete Revascularization for Acute MI & Multivessel Disease (COMPLETE-2)

Physiology-guided vs Angiography-guided Non-culprit Lesion Complete Revascularization for Acute MI & Multivessel Disease (COMPLETE-2)COMPLETE-2 is a prospective, multi-centre, randomized controlled trial comparing a strategy of physiology-guided complete revascularization to angiography-guided complete revascularization in patients with acute ST-segment elevation myocardial infarction (STEMI) or non-ST-segment elevation myocardial infarction (NSTEMI) and multivessel coronary artery disease (CAD) who have undergone successful culprit lesion Percutaneous Coronary Intervention (PCI). COMPLETE-2 OCT is a large scale, prospective, multi-centre, observational, imaging study of patients with STEMI or NSTEMI and multivessel CAD in a subset of eligible COMPLETE-2 patients.

Measure Airway Compliance by Endobronchial Optical Coherence Tomography

Measure Airway Compliance by Endobronchial Optical Coherence Tomography Optical Coherence Tomography (OCT)is a novel, non-invasive, high resolution special optical imaging techniques. In airway, Measure airway area and airway wall thickness is the most usage of Endobronchial Optical Coherence Tomography (EB-OCT). Recently, the new protocol of EB-OCT is used to measure airway compliance, We will establish a new methodology of EB-OCT for measuring airway compliance, which will provide a new means to study respiratory diseases.

Crystalline Lens Tilt Evaluation Using Swept-source Optical Coherence Tomography (PhysTilt)

Crystalline Lens Tilt Evaluation Using Swept-source Optical Coherence Tomography (PhysTilt) The human (crystalline or phakic) lens is located in the capsular bag which is attached to zonules. Zonules are fibres, that hold the lens in place. In the course of life, an opacification on the lens occurs, which is called cataract. To replace the cloudy lens, cataract surgery is being performed and an artificial intraocular lens (IOL) is implanted in the eye, after the phakic lens is removed. Misalignment or tilting of IOLs can result in reduction of visual quality, therefore prediction of the position may be beneficial. Modern optical coherence tomography (OCT) devices already provide profound information about phakic lens tilt. Still there is little data on the values that influence the tilt of the crystalline lens. Before each cataract surgery, each eye is measured using biometry (IOL Master 700). However, a statement about the tilt cannot be made with this device. For this purpose, an anterior segment OCT is required (CASIA 2). In our study, preoperative biometry data are c...

Comfortable and Stabilizing Chin & Forehead Rest Attachment for Slit Lamp Configurations

Comfortable and Stabilizing Chin & Forehead Rest Attachment for Slit Lamp Configurations In this study, participants will be imaged using two Optical Coherence Tomography (OCT) devices: device N, a standard conventional OCT device with an invention (comfortable chin and forehead rest that can be adjusted to fit each individual's size) attached to the device; and device C, the standard conventional OCT device with no invention attached. The investigators will assess whether the chin and forehead rest attachment (invention) provides a more comfortable experience for patients.

Histopathological Analysis of Temporal Artery Biopsy Following Dynamic Full-field Optical Coherence Tomography, a Comparison to Conventional Histopathological Findings in Patients With Suspected Giant Cell Arteritis (DOCTA)

Giant cell arteritis (GCA) is a type of large vessel granulomatous vasculitis responsible for the inflammation of the aorta and the branches of the external carotid, notably temporal arteries. The diagnosis of GCA relies upon the identification of vasculitis following histopathological analysis of temporal artery biopsy (TAB) showing mononuclear cells infiltration, fragmentation of the internal elastic lamina as well as significant intimal hyperplasia. Apart from its lack of sensitivity, one of the weaknesses of TAB is the delay in obtaining the result due to the time required to prepare the sample for histological analysis. Pursuing the idea to improve TAB performances, our group recently demonstrated the use of full-field optical coherence tomography (FF-OCT) to visualize structural changes associated with the inflammatory processes of GCA. The present work suggests a further use of dynamic FF-OCT on TAB for a direct visualization of the mononuclear cells infiltration to ensure ra...

Evaluate the Safety and Efficacy of Intracoronary Lithotripsy Balloon Catheter and Intracoronary Lithotripsy Apparatus

This is a prospective, multi-center, single-group target value clinical trial, which will be carried out in many clinical trial institutions in China. A total of 184 subjects (70 of them are OCT subgroups) are planned to be enrolled, all subjects were treated surgically with intracoronary lithotripsy using a balloon dilatation catheter and intracoronary lithotripsy apparatus after a single-group registration, clinical follow-up was carried out within 7 days after operation or before discharge, 1 month and 6 months after operation. The success rate of operation was taken as the main end point to verify the effectiveness of balloon dilatation catheter and intracoronary lithotripsy apparatus. ( Read Full Article )

Retinal Neurovascular Coupling in Patients Previously Infected With COVID-19

The coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is affecting almost all countries in the world and because of its worldwide spread has been declared as pandemic in March 2020. While respiratory symptoms are the main manifestation of acute infection, there is also increasing evidence that neurological and vascular symptoms occur, and it is unknown whether residuals remain after patients have recovered. A recent report shows that changes in the human retina are even present one month after onset of symptoms. The eye, as an extension of the brain, offers the advantage that blood vessels as well as neural tissue can be visualized non-invasively in-vivo. Neurovascular coupling is the ability of neural tissue to adapt its blood flow to its metabolic demands, a phenomenon that does not only occur in the brain, but also in the retina. In the retina, neurovascular coupling can be studied by stimulating the retina with flicker lig...

Retinal Microvasculature by OCT Angiography During Integrating Physical Activity in Type 2 Diabetic Subjects.

Diabetic retinopathy is a common condition of diabetes and can lead to blindness, making it one of the most feared complications of diabetes. Recently, it has been proven that the parameters measured by Optical Coherence Tomography Angiography: the vascular density of the macular retinal capillary plexi and the foveolar avascular zone, can be modified after a high-intensity sports training program in healthy subjects. the team wants to study the evolution of the macular, in type 2 diabetic subjects, before and after a stay in a care structure dedicated to the multidisciplinary and integrative management (nutrition, physical activity, therapeutic education) of a duration of 3 weeks. ( Read Full Article )

Retinal Vascular Manifestations in Patients With Common Internal Diseases on OCTA Tomography Angiography

Hypertension, diabetes mellitus, and dyslipidemia are common internal diseases, and all diseases are atherosclerosis risk factors. Previous studies applied color fundus photography to analyze retinal vascular changes (including exudation, hemorrhage, neovascularization, etc.) in patients with hypertension or diabetes, but the examination results could not be quantified. This study intends to apply optical coherence tomography angiography (OCTA) to examine retinal vessels. This method has the following advantages: 1) It can quantify vascular changes, and 2) It is noninvasive and reproducible for patients' follow-up. This study was designed to investigate retinal vascular changes in patients with hypertension, diabetes, and dyslipidemia on OCTA. We will collect the patients' general information (gender, age), comorbidities, medications, blood lipids, blood glucose, carotid ultrasound, ankle-brachial index, ambulatory blood pressure monitoring, color fundus photography, and OCTA result...

Training Health Care Professional in Detecting BCC on OCT Using E-learning and CUSUM-analysis

In this study, various health care professionals will follow an E-learning module in which BCC detection on OCT is explained. Thereafter, the participants will test their skill by assessing OCT-scans. Their performance will be monitored using cumulative-sum analysis. After completion, newly trained OCT assessors will test their diagnostic accuracy for BCC detection on OCT in a exploratory study. The trainability, amount of required training and diagnostic accuracy will be compared between dermatologist and non-dermatologists. ( Read Full Article )

All Eyes on Pcs – Analysis of the Retinal Microvasculature in Patients With Post-COVID-19 Syndrome

The investigators will recruit patients with PCS, fully COVID-19 recovered participants and COVID-19 infection naïve participants. After comprehensive clarification and given written informed consent, measurements will take place in the Klinikum rechts der Isar. To evaluate the retinal microvasculature dynamic retinal vessel analysis (DVA) and optical coherence tomography (OCT) are used. Patient reported outcomes (PROM) of PCS typical symptoms will be collected using standardized questionnaires. To ensure data quality the investigators will use standard operating procedures (SOP) for both technical measurements and data collection. For DVA measurements all examiners will be trained by a single experienced supervisor and must reach high image accuracy and quality in at least 10 volunteers. Examiners are only involved in data acquisition. ( Read Full Article )

Histopathological Analysis of Renal Biopsies With Dynamic Full-field Optical Coherence Tomography, a Comparison to Conventional Histopathological Findings in Kidney Transplant Recipients (HARBOR)

Banff classification stands as gold standard and international consensus for the identification, diagnosis and categorization of renal allograft pathology. In addition to multiple revision dedicated to the clarification and refinement of these diagnostic categories, a special attention is now dedicated to the development of automated protocols serving the use of artificial intelligence in digital pathology. To be integrated in the actual early post-transplant monitoring procedure, such original approach is considered to match various growing expectations of clinicians and pathologists regarding the future of transplant nephropathology : decrease inter-observer variability, reduce human errors and limit time-consuming analysis of kidney biopsy. Among these, an accelerated reading and access to Banff diagnostic criteria could help initiating both appropriate and immediate treatment to improve graft survival in kidney transplant recipients. Yet conventional histopathology still require...

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 patients. ( Read Full Article )

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. Recently, OCTA has been used to study the retinal vessels' structure and function in several cardiovascular diseases. As an example of its predictive potential, reduced retinal microvascular density has been associated with the cardiovascular risk profile in patients admitted to the hospital for an acute coronary syndrome. Recent studies have also shown the...

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. ( Read Full Article )

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