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Therapeutic delivery of additional oxygen to blood stream via hyperbaric and extracorporeal oxygenation that raise blood Oxygen saturation level, apart from oxygenation in the lungs, are known to induce tissue repair, restore normal body functions and improve survival. Despite the clinical benefits obtained from these interventions, Oxygen supplementation is rather a medically involved process requiring access to specialized equipment including hyperbaric chambers, cardiac catheterization laboratory and extracorporeal oxygenators, and is not generally amenable for everyday use. The current prospective study will evaluate a non-invasive route for Oxygen delivery through ingestion of super-oxygenated water in adult volunteers. The participants will be randomly assigned to one of the two treatment groups viz. super-oxygenated water or placebo control normal water at 1:1 ratio. Neither the participants nor the study doctor will know the treatment assignment. Pre- and Post-ingestion measurements will be conducted to evaluate effect of super-oxygenated water.
Patients successfully resuscitated from sudden cardiac arrest are often comatose, having suffered a period of low blood flow and oxygen delivery to the brain. They are also at risk of suffering further brain injury during the immediate period after resuscitation, in which the brain's normal regulatory functions are impaired. To diagnose and treat secondary brain injury in comatose patients after cardiac arrest, doctors use a variety of neurological monitoring techniques. One of these methods involves measuring the oxygen saturation of blood going into and out of the brain to determine whether the brain is receiving and utilizing oxygen in an optimal manner. The oxygen saturation of blood exiting the brain is called the jugular venous oxygen saturation (SjO2). It is measured by inserting a catheter into the jugular vein in the neck and sampling blood as it exits the skull. The blood sample is sent to the hospital laboratory and the oxygen saturation is measured on a blood gas machine. This method of SjO2 measurement has limitations, particularly that blood must be taken out of the patient and sent to the lab for analysis, which can only be done feasibly every few hours. Special catheters exist that can measure the oxygen saturation of blood passing by the tip of the catheter inside the patient on a second-by-second basis, without needing to withdraw blood and send it to the laboratory. With such rapidly available data, doctors may be able to better diagnose and treat brain oxygen abnormalities in post cardiac arrest patients. In this study, the investigators plan to determine the accuracy of an existing, Food and Drug Administration (FDA)-cleared catheter capable of continuous, indwelling measurement of venous blood oxygen saturation for SjO2 monitoring in comatose patients early after cardiac arrest. The SjO2 measurements from the study catheter will be compared with standard SjO2 measurements made by withdrawing blood and analyzing it in the laboratory to determine if the new catheter is accurate. The investigators will also collect blood samples using the study catheter to measure levels of specific proteins that indicate damage to brain tissue. The study will enroll 25 participants admitted to the intensive care unit at one hospital cared for by a group of doctors that specialize in the neurological care of patients after cardiac arrest. The investigators hypothesize that the study catheter will accurately measure SjO2 compared to the standard laboratory method.
This study aims to test the accuracy of the Perin Health Patch (PHP), a non-invasive, chest-worn device that measures blood oxygen levels, by comparing its readings to a standard pulse oximeter device. The PHP device uses light sensors to measure blood oxygen saturation (SpO2), similar to how standard pulse oximeters work, and could allow for continuous remote monitoring at home. Participants in this study will breathe low-oxygen air through a mask to simulate different oxygen levels in a controlled environment. The goal is to see if the PHP device can accurately measure blood oxygen levels under different conditions and meet safety standards set by the FDA and international guidelines.
The objective of this trial is to determine if Near-infrared spectroscopy (NIRS) can accurately evaluate the degree of Peripheral Arterial Disease (PAD) during a Provocative Elevation Maneuver of the Lower Extremity (PEMLE) test, as compared to routine clinical assessments.