View clinical trials related to Oxygen.
Filter by:IIn this study, the investigators planned to investigate effectiveness of supplemental oxygen in patients (18-65 years) who were diagnosed as headache related to migraine without aura in the emergency department (ED). Patients who will be ordered standard migraine therapy (50 mg dexketoprofen and 10 mg metoclopramide HCl in 100 cc normal saline IV) by the physician blind to research, will be evaluated by the researchers before the treatment and patients met the study criteria will be included. Included patients randomly divided to two group, study group will receive supplemental oxygen with face mask for 1 hour. Patients' visual analog score (VAS) will be measured at 0th, 15th, 30th and 60th minute of treatment. If there will not be a 50% decrease at VAS score from the beginning, patients will be examined again by the physician again. Patients who will be ordered 100 mg tramadol as rescue therapy by the physician, will be continued to observed, VAS scores will be measured at 120th minute again. To avoid drug related bias, patients who will be ordered any other drug for primary care or rescue treatment other than mentioned above will not be included into the study.
Endoscopic microsurgical procedures of the larynx (direct examination-bx, microlaryngeal resection) require the anesthesiologist and surgeon to work in the same area throughout the procedure, and while ventilation is provided during the procedure, small diameter endotracheal tubes are preferred to see the surgical area as easily as possible. However, it is sometimes observed that even conventional endotracheal tubes of this diameter make surgery difficult by obstructing the view. On the other hand, apneic laryngoscopy techniques used in upper airway surgeries, such as microlaryngoscopy and laryngotracheal surgery, where the airway is shared by the anesthesiologist and surgeon, have been replaced by safer and controlled high-frequency jet ventilation applications due to the risk of hypoxemia and hypercapnia. In recent years, oxygenation has come to the fore with Transnasal High Flow Insufflation (OptiflowTM - Fischer & Paykel Healthcare, Auckland, New Zealand), an apneic oxygenation method. This randomized study aimed to compare the effects of high-flow nasal oxygen and jet ventilation on oxygenation in patients receiving general anaesthesia for endolaryngeal surgery.
Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) allows to extend the apnoeic window in patients undergoing general anesthesia by delivering 100% of heated and humidified oxygen at 70L/min in order to maintain viable gas exchange during an extended period of cessation of spontaneous ventilation. This technique has been successfully applied in several clinical settings (induction of general anesthesia, laryngoscopy in predicted difficult airway management, and as unique airway management technique for procedural sedation or general anesthesia for brief surgical procedures). Operative hysteroscopy is a brief surgical procedure usually performed under general anesthesia with intravenous agents (propofol plus fentanyl) and positive pressure ventilation through facial or laryngeal mask. The aim of this study is to investigate the effects of THRIVE apnoeic ventilation during hysteroscopy under general anesthesia. Our primary outcome is to describe the trend of SpO2 and tcCO2 during the procedures. Secondary outcomes include description of arrhythmias requiring medical treatment, hemodynamic instability, unmanageable copious secretions, airway obstruction or inability to maintain airway patency, witnessed aspiration, airway related complications, number of airway manipulations, adverse events, assessment of postoperative dyspnoea and comfort, patient satisfaction. Women (> 18 years old and < 70 years old), ASA physical status I and II presenting for elective operative hysteroscopies will be included. A number of 30 patients was planned to target the primary outcome.
Carbon dioxide which is insufflated to inflate the abdominal area is absorbed from the peritoneal area and it increases endogenous catecholamines, which may consequently increase nausea and vomiting. In the literature, it is indicated that oxygen application which is one of the applications aiming to prevent nausea and vomiting is a cheap method with fewer side effects in the prevention of postoperative nausea and vomiting. In the literature, studies on the prevention of nausea and vomiting by oxygen application in different surgical interventions have not arrived at a consensus regarding surgery type and oxygen amounts. There are studies evaluating 80% and 30% oxygen amounts in removing postoperative nausea and vomiting. Taking these conditions into consideration; the study has been planned for the purpose of examining the impact of giving 80% and 60% oxygen to patients to whom laparoscopic cholecystectomy is applied on postoperative nausea and vomiting in the postoperative period. The study has been planned as a randomized controlled study for the purpose of determining the impact of giving oxygen (80% to the group A, 60% to the group B and control group C) to patients who apply to the general surgery service to undergo a laparoscopic cholecystectomy on postoperative nausea and vomiting in the postoperative period. The patients in the study will have the same standard anesthesia protocol and hospital routine. The study will be terminated once a total of 111 patients have been reached. In the study randomization, the patients will be assigned to the sample group according to weeks as they may influence each other. Data will be collected using Patient Introductory Information Form, which evaluates patients' socio-demographic characteristics, as well as Perioperative Period Patient Follow-Up Form and Postoperative Period Nausea-Vomiting Frequency and Severity Evaluation Form. Statistical analysis of the data to be acquired as a result of the study will be performed in the computer environment. The results to be obtained will be evaluated at p<0,05 significance level. It is expected that the study results will provide an alternative method, which will be used in preventing the possible side effects of postoperative nausea and vomiting in patients who undergo a laparoscopic cholecystectomy. Thus, the study results may make scientific and socio-economic contributions.
This study will describe the change of mitochondrial oxygen tension (mitoPO2) compared to traditional parameters of oxygenation and oxygen balance in the first 24 hours of septic patients admitted to the intensive care unit of an academic hospital. The mitoPO2 will be measured on prespecified measurement moments in the ICU. With each measurement moment, arterial and central venous blood gasses will be taken too.
The air we breathe contains 21% of oxygen. Oxygen is vital for the cells ability to produce energy and without it we could not survive. Oxygen normally exists as a molecule consisting of two atoms, O2. It has two unpaired electrons and thus is unstable and willing to accept electrons to become stable. During the formation of ATP a transportation of electrons happens over the inner membrane of the mitochondria's. Oxygen can accept these and is thereby reduced to water. Normally about 4% is not fully reduced and instead produces superoxide. Superoxide is transformed to hydrogen peroxide by superoxide dismutase (SOD) and then into oxygen and water by catalase and glutathione peroxidase. It is also possible for hydrogen peroxide to be converted to hydroxyl radicals by Fenton reactions. All these radicals are called reactive oxygen species (ROS) and they are highly reactive and capable to induce damage to cellular components as proteins, DNA and lipids. Under normal conditions SOD, catalase and glutathione peroxidase work as anti-oxidative compounds to prevent oxidative stress and damage. However, under hyperoxic conditions these defences can be overwhelmed, resulting in the formation of excess ROS and thus oxidative damage. During general anaesthesia the use of supplemental oxygen to avoid life-threatening hypoxaemia has been common practice for many years and a fixed fraction of inspired oxygen (FiO2) ranging from 0.3 to 1.0 is often used. This lead to supranormal levels of oxygen in the lungs and most of the patients also have supranormal levels of partial pressure of arterial oxygen in their blood. This study will examine otherwise healthy ambulant patients undergoing minor orthopaedic surgery during general anaesthesia to elucidate metabolic and physiological changes caused by ventilation with FiO2 0.50 for at least 45 minutes using standard respiratory settings. Exhaled breath condensate (EBC) and arterial blood will be collected prior to and after surgery. The two EBCs and two blood samples will be stored at -80°C for analysis after all patients have been included. The metabolic changes will be measured with NMR technique and multivariate statistical analysis comparing baseline values with values obtained after oxygen exposure. Collapse of the small airways induced by anaesthesia and FiO2 will be evaluated by measuring resistance and reactance with airway oscillometry after surgery compared to a baseline measurement before surgery.
The purpose of this study is whether the mitochondrial oxygenation tension (mitoPO2) is a feasible and reliable tool in ICU patients with anaemia undergoing red cell transfusion to ultimately personalize blood transfusion decisions in the ICU.
Specific and objective guidelines for choosing endobronchial tube size for main-stem intubation in pediatric patients are lacking. The objective criteria for choosing an ETT size for OLV are likely to increase the safety and success. The primary aims of this study were to define the relationship between cricoid and mainstem bronchi (right and left) in children of various ages and to determine the effects of age, height and weight.
Upon collection, human oocytes are fertilized and culture up to the blastocyst stage, followed by transfer and / or cryopreservation. Culture media systems have been developed that support each step of this process. Although these culture media systems try to mimic the natural environment, several components of the in-vivo situation are not present in today´s media. One such component is anti-oxidants that may protect embryos against damage by reactive oxygen species. This investigation aims to compare blastocyst development using 2 different types of culture media systems, one of which contains antioxidants. Patients having at least eight oocytes and meeting other inclusion criteria can be included in this investigation. It is a prospective randomized multicenter study randomly dividing oocytes into two groups and assessing parameters of embryo development from fertilization up to blastocyst formation until day six. Embryos with acceptable developmental characteristics can be transferred into the uterus or cryopreserved for later use. The investigation is designed as a superiority study comparing utilization rate of blastocysts per normally fertilized oocyte using both media systems. In patients receiving embryo transfer in the fresh treatment cycle, detection of clinical pregnancy by ultrasound after 12 weeks gestation is the final endpoint of the investigation.
Pre-oxygenation with high-flow nasal cannula oxygen has been evaluated in a limited number of studies and seems to be better than traditional preoxygenation with a tight fitting mask. Oxygenation with high-flow nasal cannula in apnea demonstrates that this could be done safely for up to 25 mins with preserved saturation. Based on this, the investigators want to evaluate whether this novel concept of preoxygenation can prolong the time to desaturation in emergency anesthesia while securing a possibly difficult airway. This may reduce the number of hypoxic events during intubation. This novel concept has already been tested in clinical practice in certain cases but not during rapid sequence induction for acute surgery. Objectives and Purpose The general purpose of this project is to compare a new preoxygenation technique based on humidified oxygen in a high-flow nasal cannula with traditional preoxygenation with a tight fitting mask during rapid sequence induction intubation with focus on gas exchange.