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We list hundreds of Clinical Trials about "The Effect of Hyperoxia and Hypoxia on Fluorescence Lifetime Imaging Ophthalmoscopy in Healthy Subjects- a Randomized, Double Blind, Crossover Study" on BioPortfolio. We draw our references from global clinical trials data listed on ClinicalTrials.gov and refresh our database daily.
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The present study aims to investigate whether FLIO can also detect shorttime changes in retinal metabolism induced by hyperoxia and hypoxia. For this purpose, 48 healthy subjects will be included in the present study and changes in FLIO will be assessed during breathing of 100% oxygen to induce hyperoxia as well as during breathing of 12% oxygen in nitrogen to induce hypoxia. Since stimulation with flickering light also induces a higher metabolic demand in the retina (functiona...
Pulmonary Hypertension (PH) is a severe disease with a bad prognosis. However, thanks to extensive research in this field, there are more and better treatment options that allow patients to participate in recreational activities at moderate altitude or bring up the question of air-travel. Still very few is known about the effects hypoxic conditions have on PH patients. The aim of this study is to investigate the effects of hypoxia and hyperoxia on pulmonary hemodynamics ...
Masimo Corporation has developed a new parameter for noninvasive monitoring by optical sensors, Oxygen Reserve index (ORI). ORI is believed to correlate with the partial pressure of arterial blood oxygen (PaO2). Aim of this study is to validate the oxygen reserve index in healthy volunteers undergoing controlled hyperoxia and hypoxia.
The purpose of this research study is to measure the hypoxia (low oxygen condition) in prostate cancers and its effect in survival. In this study, investigators will assess hypoxia by magnetic resonance imaging (MRI) and create a hypoxia score. Investigators will study the hypoxia score and how it correlates (if any) to the disease aggressiveness as well as its effect on the treatment outcomes.
Hypoxia is a key factor in malignant progression of a neoplasm. It is our aim to explore the basis for quantitative in vivo tumor imaging by Cu-61 diacetyl-bis(N4-methylthiosemicarbazone)PET imaging as a surrogate of tissue hypoxia. We hypothesize that the hypoxia levels are predictive of the tumor response to therapy. Patients will have 2 CU-ATSM PET scans done and the goal is to show spatially stable tracer distributions that correlate with tumor hypoxia. This study will ser...
Rational: Preoxygenation is a standard procedure before (deep) sedation in the ED. However, there is literature suggesting that too much oxygen can be harmful. One potential detrimental effect is a decrease in cardiac output due to coronary vasoconstriction. So far, it is unknown if this effect is rate dependent and if it also occurs after only a short period of hyperoxia, as patients experience during procedural sedation pre-oxygenation. Objective: To investigate if hyperoxia...
The goal of this clinical research study is to evaluate fluorescence imaging, widefield fluorescence imaging, point spectroscopy imaging methods, and or/ oral brush cytology that may help doctors monitor patients at an increased risk of developing an oral cancer, including those with pre-cancerous lesions in the mouth.
This study aims to first apply near-infrared fluorescence imaging technology in thoracic surgery with indocyanine green in China. To evaluate the feasibility usage of the investigators' fluorescence imaging systems and the safety applications in intraoperative sentinel lymph node mapping of lung and esophageal cancer, lung nodule imaging, lung segment resection boundary determination, esophagus - tubular anastomosis, thoracic duct imaging and chylothorax repairing thoracic surg...
This study aims to evaluate the feasibility of indocyanine green (ICG)-based fluorescence imaging in the detection of liver tumors. By correlating the ICG fluorescence patterns with pathologically confirmed tumors , it would be possible to use fluorescence navigation system in helping promoting oncology treatment.
In this phase 1 study, the lymphatic transport will be examined using Near InfraRed Indocyanine Green fluorescence imaging (NIR-ICG) of the upper extremities in healthy individuals using a MultiSpectral Imaging System (MSImager).
Investigators want to use 18F-FDG PET/CT imaging to reflect tumor perfusion and hypoxia.
Hypoxia imaging has not been studied extensively by combining PET and MRI data. Few studies performed the double imaging and none associated anatomopathology with it . This study will use a rigorous methodology through the production of PET/MRI images at the same time by transferring the patient directly from PET to MRI. In addition, the population, unlike other studies, will include preoperative patients with 24-hour surgery for hypoxia imaging by obtaining additional data thr...
This is a randomized, controlled, parallel, multicenter trial to determine the difference in post-operative anastomotic leakages in colorectal surgery, where anastomosis perfusion is evaluated using indocyanine green fluorescence imaging as an addition to standard surgical practice compared to surgical practice alone.
This research study will evaluate how Near Infrared Fluorescence imaging (NIFI) with indocyanine green (ICG) contrast dye can assist in the identification and diagnosis of lung nodules during surgery. NIFI is an intraoperative imaging technology that utilizes a coupled camera/fluorophore (ICG) system to fluoresce tissues of interest. Intravenous ICG is a fluorophore with a long-standing high safety profile.
The aim of this study was to evaluate the impact of fluorescence imaging on the location of colorectal transection lines based on evaluation of perfusion with indocyanine green, how it's going to affect surgical planning and its possible benefits in reducing anastomotic leakage.
This study aims to evaluate the feasibility of indocyanine green (ICG)-based fluorescence imaging in the detection of prostate tumors and metastatic lymph nodes. By correlating the ICG fluorescence patterns with pathologically confirmed tumor and nodal status, it would be possible to use fluorescence navigation system in helping prostate biopsy and lymph node dissection in the future.
Primary • To explore the use of OTL38 and fluorescence imaging to detect RCC in partial nephrectomy at the margins of resection, and in lymph node(s) or other metastases during radical nephrectomy.
Researchers are looking for better ways of diagnosing and treating pancreatic cancer. It is believed that looking for low levels of oxygen (hypoxia) in tumours may give a better understanding of how certain tumours grow or respond to certain treatments. This study will look at hypoxia in pancreatic tumours while participants are receiving treatment with the combination of gemcitabine and TH-302/placebo in the EMR 200592-001 clinical research study. This study will use positro...
Specific aim To examine the effect of catecholamines on the modulation of intermittent hypoxia induced TNF- in human monocytes from both healthy subjects and OSA patients (2). To map the signaling pathway of catecholamines regulating the intermittent hypoxia induced TNF- expression. (3). To explore the potential therapeutic effects of or agonists/antagonists on intermittent hypoxia induced TNF- expression
The study is a prospective field evaluation to assess the effects of the chronic Intermittent Hypoxia exposure in 12 healthy humans. Precisely, the study was designed to : Set up a new model of Chronic Intermittent Hypoxia (CIH) applied to healthy human. This CIH is mimicking the CIH undergone by patients suffering from Sleep Apnea Syndrome. Evaluate the cardiovascular effect of CIH. Neuronal and humoral sympathetic control, blood pressure control, vascular resistance....
Several studies show how patients with hyperoxia after cardiac arrest has increased mortality, but the association of hyperoxia before cardiac arrest and myocardial damage has never been investigated. Neither has the association between hyperoxia after cardiac arrest and myocardial injury. Our research hypothesis is that hyperoxia before cardiac arrest aggravates myocardial damage, secondly we wish to analyze the association between hyperoxia after cardiac arrest and myo...
Prospective observational study in 40 adult critically ill patients. Patients were eligible if they were mechanically ventilated with an FiO2 ≤0.5 and PaO2/FiO2 ≥200 mmHg and hemodynamically stable with a hemoglobin ≥9 g/dL, no acute bleeding or need for blood transfusions, no renal failure, no chronic obstructive pulmonary disease. Twenty patients (hyperoxia group) underwent a 2-hour exposure to normobaric hyperoxia (FiO2 1.0), 20 patients were evaluated as controls. Ser...
Patients undergoing ERCP procedure with biliary stricture will have epithelial mucosa labeled with QRH-882260 fluorescence peptide that binds to EGFR. A custom mini-cholangioscope will be used to image the luminal surfaces of the biliary duct that are exposed to the fluorescence peptide. The images will be recorded and analyzed for relative fluorescence pattern and intensity and correlated to patient diagnosis and clinical outcomes.
To determine if exposure of older volunteers, age 50-70y, who are healthy, but not physically active, to 7 days of mild hypoxia (15% oxygen, equivalent 2440m) will improve cardiopulmonary functional capacity.
In this study, we aim to evaluate the feasibility of anti-PSMA labelling to detect post-operative prostatic tissues by two ex vivo fluorescence techniques. We will evaluate the feasibility and detection of anti-PSMA labelling by: 1. / the FEMTO-ST institute medical device, 2. / the confocal microscope that will be used to measure fluorescence spectra of biological samples.