Active clinical trials for "Hypoxia"

In our study, we aimed to investigate the relationship between STOP-BANG and 4-Variable Screening questionnaires in postoperative period in patients who underwent bariatric surgery.

For almost a century, many hypotheses have converged on the idea of altered chemosensitivity in patients suffering from hyperventilation syndrome (HVS). Given the evolution of current technical equipment and the ability to maximise true positives in HVS ( using the revised hyperventilation provocation test), it seems reasonable to investigate central and peripheral chemosensitivities in HVS subjects.

With functional imaging development, it becomes possible to increase radiation dose to radioresistant areas (located inside tumor volume) using radiotherapy dose-painting. This strategy is particularly suitable for prostate cancer where tumor hypoxia plays a major role in the resistance of these tumors to radiation. In order to develop intratumoral hypoxia targeting by radiotherapy dose-painting areas, we should characterize changes in hypoxia before treatment and during radiotherapy. If hypoxia does not change during radiotherapy, radiotherapy dose-painting strategy by an "integrated" boost is performed. If hypoxia varied (increasing or incomplete regression), a "final" boost strategy of radiotherapy dose-painting(IMRT, stereotactic brachytherapy or high dose rate) after a first fractionated IMRT could be considered. This study should show that PET imaging with fluoromisonidazole (18F-MISO) is an available tool to physicians in assessing tumor hypoxia.

There is growing evidence that the risk of postoperative complications can be decreased by optimizing the amount and type of infusion fluids given during surgery, steered by goal-directed therapy based on flow-related hemodynamic parameters, particularly in high-risk patients. This study is undertaken subsequently to test the hypothesis that the intraoperative goal-directed strategy based on FloTrac/Vigileo, a minimally invasive monitor, can partially prevented postoperative complications and shorten hospital stay in the elderly high-risk patients undergoing total hip replacement with continuous spinal anaesthesia .

Performance testing of pulse oximeters. The protocol involves brief stable arterial oxygen desaturation in healthy volunteers and sampling arterial blood when a stable level of hypoxia has been attained. The blood sample is analyzed for oxygen saturation with a gold standard bench CO-oximeter. This protocol is aligned with the latest ISO and FDA guidance documents for pulse oximeter testing.

The purpose of this study is to identify patient and provider-chosen factors that put patients at risk for the development of hypoxemia (oxygen saturation < 90% for 5 seconds) during endoscopy and to use this knowledge to develop a treatment protocol for specific causes of hypoxemia in adult esophagogastroduodenoscopy outpatients.

Prospective, randomized clinical multicentric study, in ICU, during preoxygenation for the intubation of hypoxemic patients.

The investigators tested the hypothesis that alveolar recruitment maneuver during cesarean section and in women under general anesthesia improves lung compliance and gas exchange. The investigators applied recruitment maneuver and positive end expiratory pressure (PEEP) 8 cmH2O. The maximum alveolar pressure limit (Ppeak)was 45 cmH2O during the recruitment maneuver. The primary end point of the study is the improvement of the lung compliance measured as volume difference/pressure difference (dv/dp) or ml/cmH2O

To prevent bronchial aspiration during induction of anaesthesia it has been a common procedure to perform a cricoid pressure, called Sellicks Maneuver, to occlude esophagus, and thereby prevent aspiration. During the last ten years the efficiency of this maneuver has been discussed, since it probably prolong the intubation time and do not significantly reduces the risk of aspiration. The hypothesis is that Sellicks Maneuver prolong the time of intubation and reduces the view of the laryngeal inlet, during intubation with a videolaryngoscopy. The hypothesis is tested by a double-blinded randomized study where patients is intubated twice, with and without Sellicks Maneuver, in a randomized order. The specific cricoid pressure is blinded to the personal performing the intubation.

In the study the value of capnography for avoiding complications during sedation for colonoscopy is evaluated.