View clinical trials related to Hypoxia, Brain.
Filter by:Severe traumatic brain injury with a decrease in cerebral oximetry is associated with multiple impaired systemic microcirculations, more morbidities, and a higher mortality rate. When using the brain as an index organ, interventions to improve brain oxygen delivery may have systemic benefits for these patients.
Studying the effect of passive versus Blanket roll III modality of therapeutic hypothermia (TH)on myocardial function of asphyxiated neonates through using tissue Doppler (TD).
In this study, we investigated the effect of the capacity to cope with oxidative stress (oxidative stress response during and after clamping) in individuals with cerebral oximetry level between 40- 60 % and above 60 % and their effect on cognitive functions. Methods: In this retrospective study, patients who were scheduled for carotid endarterectomy, examined the MOCA tests before and after the operation and collected blood samples intraoperatively were included between January 2020-2021. The time periods specified below, blood samples were taken and serums were frozen at -80 celcius all this patients. Montreal cognitive function assessment test was applied before the operation, 24 hours and 7 days after the operation. Ten mililiters venous blood samples were collected to examine the status of basal neuron specific enolase, S100B, oxydative stress parameters (HAF-1 and DAF-1) at time intervals. Time intervals as follow: T1: Peripheral baseline measurements (blood will be taken from arterial blood sampling) + Cerebral Oxymeter levels + Montreal cognitive performance test + Modified Rankin Scale (mRS) T2: 1 minute before clamping (from peripheral and jugular vena blood sampling) + Cerebral Oxymeter levels T3: Before opening clamp(from peripheral and jugular vena blood sampling) + Cerebral Oxymeter levels T4: 24 hours after the procedure. (peripheral blood sampling) + Montreal cognitive performance test T5: 7 days after the operation. (peripheral blood sampling) + Montreal cognitive performance test + CO levels+ Modified Rankin Scale (mRS) Results: We found significantly positive corelation between cerebral oxymeter levels, oxydative stress parameters and cognitive performance tests in this six patient.
A total of 40 ASA (American Society of Anesthesiology) physical status I-III who underwent lumbar disc hernia repair for one or two levels were included in this prospective study. A standard anesthesia protocol was performed in all patients. Routine intraoperative monitoring consisted of electrocardiography, automatic noninvasive arterial blood pressure, pulse oximetry, capnography, and cerebral tissue oxygen saturation through NIRS.Patients' demographics such as age, gender, height, weight, BMI, smoking status and pre-existing medical conditions were recorded.The patients were allocated equally to two groups according to BMI as Group I: BMI ≥30kg/m2,Group II <30 kg/m2.
When patients survive a severe brain injury but fail to fully recover, they often enter a Disorder of Consciousness (DoC) --that is, a set of related conditions of decreased awareness and arousal including the Vegetative State (VS) and the Minimally Conscious State (MCS). When these conditions become chronic, there are no approved treatments to help bolster any further recovery. In prior work, we have shown the clinical feasibility and potential of Low Intensity Focused Ultrasound Pulsation (LIFUP) as a remarkably safe form of non-invasive brain stimulation in these conditions.
In response to "conscious" EEG findings related to detectable cognitive function that reliably denote awareness in vegetative state patients, in the current study, we will assess the covert conscious EEG activity (as well as standard clinical overt measures) and neuroplasctic propensity (i.e., changes in EEG spectral power synchronization values following tDCS intervention) in vegetative-state patients receiving repetitive transcranial direct current stimulation (tDCS) treatment over frontal motor areas for a period of two weeks. In support of this approach, a recent tDCS study with vegetative and minimally conscious patients implied that a twenty minutes anodal stimulation (i.e., excitatory stimulation) to the left dorsolateral prefrontal cortex (DLPFC) significantly increased CRS-R scores versus sham (placebo: non-active stimulation) stimulation condition. It was noted that this tDCS effect was more pronounced in minimally conscious state patients versus vegetative state patients excluding effects of chronicity or etiology. Thus, the investigators in this study suggested that tDCS could be effective in improving cognitive recovery in severely brain-injured patients. However, their findings would benefit neural activation correlates that could support their conclusion regarding the effectiveness of this type of non-invasive intervention in promoting neurocognitive recovery. Most importantly, tDCS is safe for use in humans, has no adverse effects, is considered the most non-invasive transcranial stimulation method because it uses extremely weak currents (0.5 to 2 mA), and, is known to only temporarily shift the neuron's membrane potential towards excitation/inhibition. In regard to the method's potential to induce functional recovery in vegetative state patients, recent clinical studies indicate that tDCS could counteract the negative effects of brain damage by influencing neurophysiological mechanisms, and is likely to contribute to the "formation of functionally meaningful connections and the maintenance of existing pathways" .
Admission into a pediatric intensive care unit (PICU) is a highly stressful experience for child and family. High levels of stress can negatively impact outcomes, yet non-pharmacological interventions to decrease stress in the PICU are severely lacking. This is a prospective, single-arm feasibility trial that will explore the feasibility and acceptability of a music therapy intervention to decrease stress in the PICU among families of children receiving invasive or noninvasive mechanical ventilation. Objectives: The aims of this study are to: 1) Assess the feasibility of implementing a music therapy intervention in the PICU among children receiving invasive or non-invasive mechanical ventilation; 2) Determine the acceptability of the music therapy intervention in the ICU among caregivers, patients, and pediatric and cardiac ICU staff; 3) Explore the variability in child and caregiver stress outcomes throughout ICU admission. Hypothesis: The music therapy intervention will be feasible, as determined by recruitment, retention, protocol adherence, and data collection rates, and will be acceptable to participants and to PICU staff. Sample: This study will recruit 20 families that include children aged 2 months - 17 years old admitted with an expected length of ICU stay greater than 72 hours. Of these 20 families, the investigators will specifically recruit 10 families whose child is admitted for a hypoxic brain injury. Eligible children are receiving either noninvasive mechanical ventilation (i.e., continuous or bilevel positive airway pressure), invasive mechanical ventilation, or have an established tracheostomy tube and with escalated support settings. One primary caregiver will be enrolled along with the child admitted into the ICU.
Intermittent episodes of hypoxemia and/or bradycardia, also defined as cardio-respiratory events (CRE) are very frequent in preterm infants and may result in transient hypoxia and hypoperfusion of target organs, with possible clinical implications. The hemodynamic instability that characterizes the first 72 hours of life, also called as transitional period, place preterm infants at high risk of complications and may contribute to enhance fluctuations in end-organ perfusion and oxygenation induced by CRE. In this study we aimed to explore cardiovascular and cerebrovascular changes determined by different CRE types in preterm infants during the transitional period.
The aim of this study to evaluate the patients who underwent controlled hypotensive anesthesia under standardized depth of anesthesia; preoperative and postoperative blood HIF 1a, TAS, TOS measurement and cerebral perfusion evaluation with NIRS and to investigate tissue hypoxia secondary to hypotensive anesthesia and the changes of the mediators at the tissue level and which blood pressure parameters are related.
The objective of this study is to show that the measurement of auditory and vibro-tactile evoked potentials, or the recording of the EEG signal during a motor imaging task, can be used in routine clinical situations to explore the state of consciousness of subjects in Non-responsive Awakening (or Chronic Vegetative State) or in Minimal Consciousness (or relational state) after a severe brain injury. Assumptions : - Correlation between patient response rates obtained with the brain-machine interface and their clinical consciousness score (Coma Recovery Scale Revised score) - Differentiation of the parameters of the evoked potentials P300 between patients in a vegetative state and those in a state of minimal consciousness