View clinical trials related to Anesthesia.
Filter by:The occurrence of arterial oxygen desaturation (hypoxemia) during the induction of general anesthesia remains one of the main causes of complications and mortality in anesthesia. In a healthy patient breathing in ambient air [Inspired O2 fraction (FiO2) = 21%] before the onset of narcosis, a drop in arterial O2 saturation (SpO2) occurs within 1 to 2 minutes. When pre-oxygenation is performed for 3 minutes in healthy subjects with FiO2 = 100%, SpO2 is less than 97% after 7.9 minutes of apnea and arterial O2 desaturation (SpO2 <93%) occurs after 8 to 9 minutes. For this reason and "in order to prevent arterial desaturation during tracheal intubation or supraglottic device insertion maneuvers", it is recommended "to systematically perform a pre-oxygenation procedure (3 min / 8 deep breaths) , including in the context of an emergency ". Tolerance to apnea is conditioned by the amount of O2 stored during the pre-oxygenation phase. Oxygen is transported to different tissues in 2 forms: combined with hemoglobin (Hb) and in dissolved form. In ambient air, the quantity of O2 transported by the Hb is much greater than the part transported in dissolved form. However, when the patient breathes a gas enriched in O2, all the molecules of Hb are quickly saturated (SpO2 = 100%), while the content of dissolved O2 increases constituting a reserve allowing to increase the tolerance to apnea. Under usual conditions (3 minutes pre-oxygenation with FiO2 = 1), tolerance to apnea is shorter in obese subjects. Arterial O2 desaturation occurs after 2-3 minutes of apnea in patients with grade III obesity [Body Mass Index (BMI)> 35 kg / m2]. In addition, arterial O2 desaturation is faster the higher the BMI is. In fact, in obese patients, the lung volumes that can be mobilized in the supine position are modified compared to the non-obese subject: decrease in vital capacity, decrease in expiratory reserve volume, increase in airway resistance, decrease in thoracic compliance. These changes are, in part, explained by the weight of tissue on the rib cage and abdomen leading to compression of the lungs and diaphragm. In addition, there is also an increase in oxygen consumption in patients with a BMI> 40. Different techniques have been proposed to increase apnea tolerance in obese patients. For Dixon et al., The desaturation of the morbidly obese subject (BMI> 40 kg / m2) is less rapid after 3 minutes of pre-oxygenation carried out with the patient in a half-seated position at 25 °: 201 seconds against 155 seconds in the Control group. This additional time seems to correlate with the value of the arterial pressure in O2 (PaO2) measured at the end of the pre-oxygenation (442 vs 360 mmHg). Likewise, the proclive position (30 ° reverse Trendelenburg) during the pre-oxygenation phase seems effective in limiting the occurrence of desaturation after induction. The O2 reserve is usually assessed by measuring the partial pressure of O2 in the arterial blood. A value greater than 100 mmHg indicates that an amount of O2 is "in reserve", increasing tolerance to apnea. In practice, this examination is not feasible in current practice because it requires the performance of an invasive procedure, cannot be measured continuously and the rendering of the result is delayed by several minutes. In recent years, a technology based on spectrophotometry has been developed to measure the saturation of Hb in O2 in non-pulsatile blood. By algorithmic transformation, an Oxygen Reserve Index (ORI) is calculated. Its value varies from 0 to 1 and covers a data range between 100 and 200 mmHg of blood pressure in O2 (moderate hyperoxia). This data is obtained continuously and non-invasively from a sensor (RD Rainbow SET R Sensors; Masimo) placed on the 3rd or 4th finger of the hand. When a patient receives an O2 enriched gas mixture, the value of ORI increases rapidly and reaches a plateau. When the patient is in apnea, the drop in the ORI value precedes the drop in SpO2 by several tens of seconds. In a pilot study observing the kinetics of ORI in non-obese (BMI <25 kg / m2) or obese (BMI> 30 kg / m2) anesthetized patients, we observed that the time required to reach the plateau of l The ORI was longer (133 ± 30 seconds) in "obese" patients compared to "non-obese" patients (89 ± 28 seconds). Thus, one hypothesis to explain the poorer tolerance to apnea in obese patients would be that the duration of 3 minutes of pre-oxygenation as recommended in the recommendations is insufficient.
Improving the anesthesiology management for surgical correction of spinal deformations with introducing the diagnostic methods and treatment strategy of acute pain, preventing the evolution of chronic pain. Development and implementation in clinical practice perioperative intensive care protocols for surgical correction of spinal deformities.
Purpose: 1. To determine the efficacy of low-dose esketamine in painless gastrointestinal endoscopy. 2. To determine the safety of low-dose esketamine in painless gastrointestinal endoscopy. 3. To provide a theoretical basis and new ideas for the application of esketamine as a new drug in perioperative period.
To identify the benefits from regional anesthesia use as pain management in the pediatric population by delineating the differences in efficacy of continuous nerve blockade versus single-shot techniques after pediatric orthopaedic limb procedures. By doing this, the investigators can determine if specific anesthetic techniques should become a standard of care in pain management for the pediatric population and supersede the need for opioid medication.
Moderate to deep levels of sedation and analgesia are required for ERCP. Propofol-based sedation is simple, easy to use, and effective, but is not without cardiovascular and respiratory adverse effects. The combination of remimazolam and alfentanil has shown promising results for sedation in other similar scenarios. The aim of this study was to compare the efficacy and safety of a standard propofol-alfentanil regimen with a remimazolam-alfentanil combination.
Neuroimaging data will be collected for patients that are given low doses of dexmedetomidine in order to understand its analgesic effects.
This study investigates the impact of different levels of anesthesia exposure on children's neurocognitive development and evaluates the concurrent validity of different methods that assess neurodevelopmental outcome.
The aim of our study is to prevent unnecessary intensive care unit hospitalizations by developing a scoring system to detect low-risk patients after elective intracranial neurosurgery operation.
Laparoscopic nephrectomy is a surgical technique to excise a diseased kidney. It's a minimally invasive technique, so when compared to open surgery, it can mean significantly less post-operative pain, shorter hospital stay, earlier return to work and daily life activities, a more favourable cosmetic result and outcomes similar to that of open surgery. Recently, advanced laparoscopic surgery has targeted older and high risk patients for general anesthesia; in these patients, regional anesthesia offers several advantages with improved patient satisfaction. Compared with alternative anesthetic techniques, epidural anesthesia may reduce the risks of venous thromboembolism, myocardial infarction, bleeding complications, pneumonia, respiratory depression and renal failure. The aim of this study is to compare the conventional general anesthetic technique to the regional anesthesia for laparoscopic nephrectomy, in modified lateral decubitus position using low-pressure pneumoperitoneum.
Prospective randomized controlled trial to determine if opioid-free anesthetic for tonsillectomy is non-inferior to standard opioid-containing anesthetic