1. Articles in category: Clinical Trials

    1-24 of 553 1 2 3 4 ... 21 22 23 »
    1. Evaluation of Ocular Biometry in PACD With Two Swept Source Optical Coherence Tomography Devices

      Evaluation of Ocular Biometry in PACD With Two Swept Source Optical Coherence Tomography Devices

      urpose: To investigate agreement between 2 swept source OCT biometers, IOL M.aster700 and Anterion, in various ocular biometry and intraocular lens (IOL) calculations of primary angle-closure disease (PACD). Methods: This was a prospective study conducted in a tertiary eye care centre involving biometric measurements obtained with 2 devices in phakic eye with diagnosis of PACD. Mean difference and intraclass correlation coefficient (ICC) with confidence limits were assessed, and calculations of estimated residual refraction of the IOL were analysed using Barrett's formula

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    2. Optical-Coherence Tomography for the Non-invasive Diagnosis and Subtyping of Basal Cell Carcinoma

      Optical-Coherence Tomography for the Non-invasive Diagnosis and Subtyping of Basal Cell Carcinoma

      To date, the diagnosis and subtyping of basal cell carcinoma (BCC) is verified with histopathology which requires a biopsy. Because this technique is invasive, new non-invasive strategies have been developed, including Optical Coherence Tomography (OCT). This innovative technique enables microscopically detailed examination of lesions, which is useful for diagnosing and identification of various subtypes of BCC. The diagnostic value of the VIVOSIGHT OCT in daily clinical practice, has not been established to date.

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    3. Evaluation of Lacrimal Punctal Changes by Anterior Segment Optical Coherence Tomography AS-OCT After Topical Combined Antibiotics and Steroids Treatment in Cases of Inflammatory Punctual Stenosis

      Evaluation of Lacrimal Punctal Changes by Anterior Segment Optical Coherence Tomography AS-OCT After Topical Combined Antibiotics and Steroids Treatment in Cases of Inflammatory Punctual Stenosis

      Punctal stenosis is an important etiological factor that should be considered when assessing patients with epiphora. Anatomically, acquired punctal stenosis is a condition in which the external opening of the lacrimal canaliculus is narrowed or occluded and also can be accompanied by canalicular ductal stenosis.1,2. Defining an anatomical clear cut-off value for punctal stenosis is difficult due to wide variations in patients' demographics. Clinically, punctal stenosis is defined as a punctum size restricting tear drainage in the absence of distal tear drainage abnormalities.2 Acquired punctal stenosis can be involutional, inflammatory, infectious or idiopathic.3,4 Inflammatory endogenous ...

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    4. Interventional Strategy for Non-culprit Lesions With Major Vulnerability Criteria at OCT in Patients With ACS

      Interventional Strategy for Non-culprit Lesions With Major Vulnerability Criteria at OCT in Patients With ACS

      he INTERCLIMA (Interventional Strategy for Non-culprit Lesions With Major Vulnerability Criteria Identified by Optical Coherence Tomography in Patients With Acute Coronary Syndrome) is a multi-center, prospective, randomized trial of optical coherence tomography (OCT)-based versus physiology-based (i.e. fractional flow reserve[FFR]/instantaneous Wave-Free Ratio[iFR]/resting full-cycle ratio[RFR]) treatment of intermediate (40-70% diameter stenosis at quantitative coronary angiography), non-culprit coronary lesions in acute coronary syndrome (ACS) patients undergoing coronary angiography. About 1400 patients with ACS will be randomized into the study at approximately 40 sites worldwide.

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    5. Countermeasures for Visual Impairment in Astronauts

      Countermeasures for Visual Impairment in Astronauts

      This study is being done to prevent changes in the vision of astronauts during prolonged residence on the International Space Station or a mission to Mars. This project will provide data about the efficacy of lower body negative pressure to mimic daily upright posture by intermittently lowering central venous pressure while in simulated microgravity (3 days of bed rest). The investigators expect that 3 days of bed rest will increase choroid thickness, and choroid area. The investigators hypothesize that nightly LBNP (-20mmHg) will prevent these changes.

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    6. Pelvic Organs Prolapse Treatment Using Neodymium Laser

      Pelvic Organs Prolapse Treatment Using Neodymium Laser

      The aim of this prospective study is investigation of efficiency and safety of medical device "Magic Max" for preoperative treatment of pelvic organs prolapse I-II degree of severity. To assess the condition of the vaginal walls and vulva before and after laser treatment, the following methods will be used: ultrasonography with Doppler ultrasonography, vaginal health index, histological examination, immunohistochemical examination, optical coherence tomography (OCT) (elastography). Pelvic Floor Distress Inventory Questionnaire (PFDI-20), The Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire (PISQ-12), International Consultation on Incontinence Questionnaire - Short Form (ICIQ-SF), Pelvic Floor Impact Questionnaire (PFIQ-7) will be used to collect feedback on ...

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    7. Diagnostic Reliability of OCT Biomarkers for iERM

      Diagnostic Reliability of OCT Biomarkers for iERM

      Several optical coherence tomography (OCT) biomarkers with potential to influence postsurgical outcomes after vitrectomy with membrane peeling for idiopathic epiretinal membranes (iERM) have been described in single predictor analyses in the past. Aim of the study is to assess the reliability of diagnosis of OCT biomarkers and to calculate their impact on postsurgical visual acuity in a multiple regression analysis.

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    8. A Prospective Evaluation of Clinical Impact of Physiology Versus Optical Coherence Tomography Guided PCI in STEMI Patients Without Undergoing Primary PCI

      A Prospective Evaluation of Clinical Impact of Physiology Versus Optical Coherence Tomography Guided PCI in STEMI Patients Without Undergoing Primary PCI

      This is a prospective, randomized, controlled, multicenter clinical study that plans to continuously enroll patients with STEMI who, for various reasons, have not received direct PCI treatment within 48 hours of symptom onset. All STEMI patients will be treated according to the hospital's standard procedures and will continue to watch for plaque stability for 7 to 30 days. Treatment options for STEMI include: progressive thrombus aspiration without balloon or stent implantation; Stabilization with medication in a relatively small hospital that could not provide PCI treatment and then transfer to a tertiary hospital for further evaluation; Thrombolytic therapy. After that ...

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    9. Retinal Microanatomy in Retinopathy of Prematurity

      Retinal Microanatomy in Retinopathy of Prematurity

      Retinopathy of prematurity (ROP) is a disorder of development of the neural retina and its vasculature that can impact vision in vulnerable preterm neonates for a lifetime. This study tests high-speed optical coherence tomography (OCT) technology compared to conventional color photographs at the bedside of very preterm infants in the intensive care nursery, to characterize previously unseen abnormalities that can predict a need for referral for ROP treatment, or poor visual or neurological development later in life, up to pre-school age. Our long-term goal is to help improve preterm infant health and vision via objective bedside imaging and analysis that ...

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    10. DCB Angioplasty for Coronary Lesions: an OCT Analysis

      DCB Angioplasty for Coronary Lesions: an OCT Analysis

      The paclitaxel drug-coated balloon (DCB) is an emerging device in percutaneous coronary intervention (PCI); it allows a rapid local release of an anti-restenotic drug without the use of a durable polymer or metal scaffold. The DCB has been proven to be effective with paclitaxel in preclinical trials and in clinical practice for the treatment of coronary lesions such as in-stent restenosis (ISR), de novo and bifurcation lesions. Optical coherence tomography (OCT) is an intravascular imaging modality that has higher resolution than intravascular ultrasound. Excellent contrast among lumen, vessel, and stent in OCT images allows accurate measurement of lumen and lesion ...

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    11. Evaluating the Safety of the Spectralis Centaurus Device

      Evaluating the Safety of the Spectralis Centaurus Device

      Optical microsurgery of the retinal pigment epithelium (RPE) requires reliable real-time dosimetry to prevent unwanted overexposure of the neuroretina. The SPECTRALIS CENTAURUS device implements optical coherence tomography (OCT) to detect intentional elimination of RPE cells caused by a prototype laser for selective retina therapy (SRT). Within this clinical trial the safety of the SPECTRALIS CENTAURUS device and its ability to detect RPE cell damage towards selective real-time laser microsurgery will be evaluated

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    12. Change in Retinal and Choroidal Misrovasculature in Pregnancy Period

      Change in Retinal and Choroidal Misrovasculature in Pregnancy Period

      During pregnancy many physiological changes and adaptations occur.Hormonal, hematological and hemodynamic changes are responsible for most of the ocular adaptations.We are planning to compare the choroid and retinal blood flow values and choroidal thickness of pregnant women and healthy non pregnant women with optical coherence tomography and optic coherence tomography angiography

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    13. Evaluation of Treatment for Leukoderma by Cellular Level Resolution Full-field Optical Coherence Tomography

      Evaluation of Treatment for Leukoderma by Cellular Level Resolution Full-field Optical Coherence Tomography

      OCT is an optical technology that emerged as a non-invasive skin imaging for the skin. In this protocol, the investigators plan to study the optical imaging features of leukoderma. An estimated 50 subjects will be included in this trial. This is an observational, non-randomised, non-controlled, prospective cohort study to observe the feasibility of in vivo OCT as a image tool in the diagnosis of leukoderma. Use of the device will not affect the clinical management of the subjects. Scientific Aim: To evaluate the feasibility ApolloVue S100 image system as a tool in the differential diagnosis of leukoderma..

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    14. A Mixed Quantitative and Qualitative Study to Develop and Evaluate the Application of Artificial Intelligence (AI) Methods Using Retinal Imaging for the Identification of Adverse Retinal Changes Associated With Cancer Therapies.

      A Mixed Quantitative and Qualitative Study to Develop and Evaluate the Application of Artificial Intelligence (AI) Methods Using Retinal Imaging for the Identification of Adverse Retinal Changes Associated With Cancer Therapies.

      This is a data collection study involving the gathering of clinical data and OCT ( optical coherence tomography ) scans from 350 patients. The purpose of this study is to gather data to help develop an AI algorithm to detect eye abnormalities specifically those related to certain cancer treatments. At the end of the study interviews will be held with expert ophthalmologists to assess the acceptability of implementing AI into clinical practice.

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    15. Prediction of Postoperative Visual Acuity in Cataract Patients Using a Macular Optical Coherence Tomography-based Deep Learning Method

      Prediction of Postoperative Visual Acuity in Cataract Patients Using a Macular Optical Coherence Tomography-based Deep Learning Method

      The purpose of this study is to collect the macular OCT images and preoperative and postoperative visual acuity of cataract patients who had been operated in the eye center of the Second Affiliated Hospital of Zhejiang University Medical College, and to train a model that can relatively accurately predict the postoperative visual acuity of patients by deep learing

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    16. OCT Guided vs COmplete Pci in patieNts With sT Segment Elevation myocArdial infarCtion and mulTivessel Disease

      OCT Guided vs COmplete Pci in patieNts With sT Segment Elevation myocArdial infarCtion and mulTivessel Disease

      In patients with ST segment elevation myocardial infarction (STEMI), percutaneous coronary intervention (PCI) of the culprit lesion significally reduces the risk of cardiovascular death. How to manage in this setting non-culprit lesion in patients with multivessel disease still remain a matter of debate. Recently, the COMPLETE trial showed that complete PCI of every coronary stenosis > 70% (or 50-69% lesions with FFR < 0.8) reduces risk of myocardial infarction (MI) and unstable angina (UA) at 3 years compared with culprit-lesion PCI [1]. Whether this findings are related to revascularization of every obstructive lesions rather than lesions with vulnerable-plaque characteristics, still remain ...

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    1-24 of 553 1 2 3 4 ... 21 22 23 »
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