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27 active trials for General Anesthesia

Population Pharmacokinetics and Clinical Individual Dosage Regimen of Propofoll Injection

Propofol is a widely used sedative anesthetic, but there are large individual differences, which making different patients with different sensitivity to propofol. The aim of this study was to analyze the effects of age, height, body weight, Drinking, metabolic enzymes CYP2B6 and UGT1A9 on Pharmacological effects and pharmacokinetics of propofol, and to provide a reasonable reference for clinical anesthesia patients and evidence for individual dosage regimens.

Start: September 2018

Different Preoperative Psychological States on Postoperative Pain and Sleep Quality

Severe knee osteoarthritis that is unresponsive to conservative treatment is effectively managed with total knee arthroplasty (TKA). Pre-operative anxiety is commonly seen among patients who are going to receive TKA, which also lead to increased anesthetics during the surgery. Some studies found that general anesthetics as an independent risk factor could result in a desynchronization of the circadian time structure and cause postoperative sleep disorders characterized by reduced rapid eye movement (REM) and slow wave sleep (SWS), which have signi?cant deleterious impacts on postoperative outcomes, such as postoperative fatigue, severe anxiety and depression, emotional detachment and delirium, and even pain sensitivity or postoperative pain of patients.

Start: January 2021

Effect of Dobutamine on Hepatic Blood Flow During Goal-directed Hemodynamic Therapy

Maintaining adequate perfusion pressure and oxygen supply is essential for organ survival. Splanchnic hypoperfusion during the perioperative period in abdominal surgery may result in mucosal ischemia with increased permeability of the gut barrier. Additionally, the liver is also sensitive for hypoxemia and hypoperfusion, especially during liver surgery. Anesthetics (such as propofol or sevoflurane) have a cardiovascular depressant effect, resulting in a reduction of cardiac output (CO). Dobutamine is used to counteract myocardial depressant effect of anesthetics. Additionally, dobutamine is frequently used during abdominal surgery to maintain splanchnic perfusion. Dobutamine could increase hepatic blood flow (HBF) indirectly by increasing cardiac output or directly by stimulating adrenergic receptors in the splanchnic circulation. The hepatic circulation has a large number of alpha and beta adrenergic receptors and could be sensitive for adrenergic stimulation such as dobutamine. Hence, dobutamine could have a direct effect on the hepatic vasculature. The aim of the study is to evaluate the effect of dobutamine on hepatic blood flow during goal directed hemodynamic therapy and to distinguish between potential direct and indirect effects.

Start: May 2021

Comparison of Receiving Painless Gastrointestinal Endoscopy in the Morning or Afternoon on Postoperative Sleep Quality

Gastrointestinal endoscopy (GIE) are important examinations for screening, diagnosing, and treating a variety of gastrointestinal diseases. Specifically, endoscopy is one of the best surveillance tools for early detection of several cancers, GIE is increasingly being used because of government support for cancer screening and growing interest in preventive medicine. But some patients refuse endoscopic examinations because of fear and anxiety of discomfort during the procedure. Sedatives is increasingly used in GIE these years to reduce the anxiety and discomfort of patients and increase patient satisfaction. Sedatives also minimize the risk of patient injury during GIE and provide ideal working conditions for endoscopists to improve patients' satisfaction with surgery. Sedation can be divided into four levels: minimal sedation (anxiolysis), conscious sedation, deep sedation, and general anesthesia. A combination of benzodiazepines and opiates (midazolam and fentanyl), the medications used most commonly by gastroenterologists for procedural sedation, provides adequate analgesia and sedation during colonoscopy. Besides above, propofol is an intravenously administered hypnotic drug used for induction and maintenance of general anaesthesia and is also used in procedural sedation. Nowadays, propofol sedation is preferred by more and more endoscopists for colonoscopy procedures with its perceived benefits of rapid postprocedure drug clearance, improved patient comfort and rapid recovery/discharge when compared to conventional sedation. And propofol provided more rapid recovery than midazolam, it has the merit of post-procedure neuropsychologic function over midazolam. Previous studies have found that general anesthesia, as an independent risk factor, may lead to desynchronization of the circadian rhythm, which could result in postoperative sleep disorders characterized by reduced rapid eye movement (REM) and slow-wave sleep (SWS). Postoperative sleep disorders could cause serious adverse effects on postoperative outcomes, such as postoperative fatigue, severe anxiety and depression, emotional detachment and delirium, and even increased pain sensitivity or postoperative pain in patients. Previous studies have found that general anesthesia, as an independent risk factor, may lead to desynchronization of the circadian rhythm, which could result in postoperative sleep disorders characterized by reduced rapid eye movement (REM) and slow-wave sleep (SWS). Postoperative sleep disorders could cause serious adverse effects on postoperative outcomes, such as postoperative fatigue, severe anxiety and depression, emotional detachment and delirium, and even increased pain sensitivity or postoperative pain in patients. At present, there are few studies that have assessed the effect of circadian rhythm during different timings of gastrointestinal endoscopy on postoperative sleep quality, and pain under general anesthesia. Based on these considerations, we sought to answer the questions in this study: What is the impact of morning operation and evening operation on the intraoperative anesthetic requirement under general anesthesia? What are the effects of different timings of surgery on the postoperative sleep quality and pain under general anesthesia?

Start: May 2021

Interest of the Study of Electroencephalogram and Peripheral Vegetative Markers for the Evaluation of Nociception Under General Anesthesia.

General anesthesia (GA) is a state of loss of consciousness induced by anesthetic products. In a GA, two classes of products are usually used: on the one hand, hypnotics that are responsible for the sleep component (hypnosis) and memory loss (amnesia), and on the other hand opioids that have an analgesic role. The doses of hypnotic and morphine necessary to achieve this state of loss of consciousness and lack of response to painful stimulation vary from subject to subject, and during surgery depending on the intensity of the stimulus, requiring permanent adaptation to avoid overdose or underdosing, responsible for morbidity. Several monitors of the hypnotic component have been developed in recent years, which can now be used routinely, such as the Bispectral Index (BIS) or Spectral Entropy. However, there is currently no clinically validated technique for monitoring pain or the effect of opioids in the operating room. Spectral analysis of the electroencephalogram (EEG) revealed a significant decrease (-30%) in alpha spectral power, observed specifically in painful experimental conditions in healthy awake subjects. On the other hand, a painful experience is accompanied by transient changes in various parameters under vegetative control, whether cardiovascular, cutaneous or pupillary, essentially underpinned by the activation of the sympathetic system. The investigators hypothesize that a real-time dynamic analysis of the spectral power of EEG combined with that of cardiovascular vegetative parameters, cutaneous conductance and pupillary diameter is likely to be a marker of nociception under GA.

Start: May 2021

Assessment of Changes in Oral Health-related Quality of Life , Oral Hygiene Status and Body Growth in CSHCN Following Dental Treatment Under General Anaesthesia

evaluation of the impact of dental treatment under GA on oral health-related quality of life (OHRQoL) in children with SHCN with severe dental caries with Assessment in change in oral health status and the impact on children's weight (Wt), height (Ht), Body Mass Index (BMI).

Start: July 2021

Safe Use of CPAP and PEEP During Induction of General Anesthesia

The study compares the safety of using pressure controlled ventilation with a positive end-expiratory pressure (PEEP) during induction of general anaesthesia immediately after apnoea to a standard method starting ventilation manually without PEEP immediately after apnoea.

Start: September 2021

Translation and Validation of the Turkish Version of the ObsQoR-11 Questionnaire

Ciechanowicz et al. developed and validated a postpartum recovery score for women with a caesarean section: the ObsQoR-11. The psychometric validation of the ObsQoR-11 confirms its reliability, its response to change, its acceptability and its feasibility. The use of this score allows the investigators to quantify the quality of the patient's recovery between 0 and 110, by allocating a score from 0 to 10 for each item. ObsQoR-11 has not yet been validated for use in Turkish. Therefore the investigators aimed to psychometrically evaluate the Turkish translated version of the ObsQoR-11 in a Turkish cohort of women.

Start: January 2021

Canine Occlusal Relationship Changes After Stainless-Steel Crown Placement Under General Anesthesia

The aim of the study is to Assess and compare canine occlusal relation in children with carious primary molars before they are treated by stainless steel crowns under general anaesthesia and after their placement, evaluate the possibility and the time required for the post-operative canine relation to resolve and how the treatment affects frequency and type of food intake.

Start: February 2021

Canine Occlusal Relationship Changes After Full Mouth Rehabilitation Under General Anesthesia

The aim of the study is to assess and compare canine occlusal relation in children with carious primary molars before they are treated by stainless steel crowns under general anesthesia and after their placement ,to evaluate the possibility and the time required for the post operative canine relation to resolve and how the treatment affects frequency and type of food intake.

Start: February 2021

Application of Visual Laryngeal Mask Airway Combined With Endotracheal Intubation in General Anesthesia

To study the advantages of visual laryngeal mask combined with endotracheal intubation in general anesthesia surgery, we compared intubation time, intubation times and intubation success rate of endotracheal intubation through laryngeal mask airway under visual and non-visual conditions, at the same time, the laryngeal mask displacement rate, volume of secretion in airway, the incidence of laryngeal spasm, the incidence and severity of postoperative oropharyngeal pain were also compared between two groups.

Start: February 2021

Effect OF Nitrous Oxide On Acute Pain and Opioid Consumption, and Chronic Pain After Hysterectomy

The study is prospective and double blind. In the clinic, patients undergoing hysterectomy that meet the criteria for inclusion into the study and agreed to participate in the study will be randomized into two groups.

Start: May 2012

Plasmatic Concentrations of Propofol and Remifentanil in Obese and Non Obese Patients.

This prospective monocentric phamacokinetics study aims to compare plasmatic concentrations of Propofol and Remifentanil required to target a specific range of monitored anesthesia and analgesia during sus-mesocolic surgery in obese and non obese patients.

Start: December 2018

Correlation Between Core Temperature and Skin Temperature Measured by 3M SpotOn

Core temperature should be monitored under general anesthesia. Recently developed 3M Spoton skin temeprature which is applied on temporal artery is correlated with core temperature measure by esophageal prove in several studies. Conventional skin temperature over carotid artery is also correlated with core temperature in several studies. The purpose of this study is comparing 3 methods of temperature monitoring. First, conventional core temperature measure by esophageal stethoscope. Second, 3M Spoton applying on temporal artery. Third, 3M Spoton applying on carotid artery

Start: September 2019

The Disorder of Circadian Clock Gene and Early Cognitive Dysfunction After General Anesthesia

Postoperative cognitive dysfunction (POCD) is a common postoperative complication in patients aged 65 and over, which refers to cognitive function changes such as memory decline and attention deficit after anesthesia and surgery. In severe cases, personality changes and social behavior decline may also occur, resulting in irreversible cognitive impairment.Previous studies have suggested that cognitive dysfunction after general anesthesia is linked to a genetic disorder of the body clock.Exosomes are cellular forms of cellular microvesicles containing complex RNA and proteins.Exosomes can mediate the expression of genes in the late transcriptional period of the clock system, and directly or indirectly participate in the negative regulation of rhythm expression of minute control genes, playing an important role in the intercellular circadian rhythm information output pathway.Rhythm disorders in the core biological clock system of urinary exosomes and the clock control genes related to kidney can early indicate circadian rhythm changes in the core biological clock system.The sorting and detection of urinary exosome clock information materials in patients has the advantages of easy access, continuous monitoring, early diagnosis and less damage, making urinary exosome a biomarker for the diagnosis and monitoring of circadian rhythm of a good kidney biological clock system.

Start: July 2020

End-eXpiratory Occlusion Test to Predict fluId REsponsiveness in the Operating Room (EXPIRE)

The purpose of the study is to evaluate the influence of different durations of the end-expiratory occlusion test to predict fluid responsiveness in mechanically ventilated patients in the operating room.

Start: June 2020

Effect of Etomidate and Propofol on Electroencephalography

Electroencephalography (EEG) monitoring reflect the brain electro-activity. Different anesthetics may show different changes in EEG during anesthesia. Etomidate and propofol are widely used for general anesthesia. The characteristic changes of these two anesthetics may be different.

Start: April 2020

Effect of Multimodal Opioid-free Anesthesia on Return of Bowel Function in Laparoscopic Colorectal Surgery

The objective of this study is to determine if an opioid-free general anesthetic (OFA) technique utilizing lidocaine, ketamine, dexmedetomidine and magnesium reduce postoperative opioid consumption and speed return of bowel function in patients undergoing elective, laparoscopic, colorectal surgery compared to traditional opioid-containing general anesthetic techniques. It is hypothesized that this intraoperative OFA regimen will reduce postoperative opioid consumption, and expedite return of bowel function in this population.

Start: June 2020

Efficacy of Opioid-free Anesthesia in Reducing Postoperative Respiratory Depression in Children Undergoing Tonsillectomy

The objective of this trial is to determine whether an opioid-free general anesthetic (OFA) technique utilizing ketamine, dexmedetomidine, lidocaine, and gabapentin can help reduce postoperative respiratory depression in the post-anesthesia care unit and ward in children with sleep-disordered breathing undergoing tonsillectomy when compared with traditional opioid-containing techniques. It is expected that this OFA regimen will have a measurable reduction on postoperative respiratory depression in children with sleep-disordered breathing.

Start: October 2017

Magnetically Guided Endotracheal Intubation and Airway Cleaning Robot System

Endotracheal intubation refers to the use of special equipment, through the nasal cavity or oral cavity, through the throat, glottis, the process of inserting the endotracheal tube into the trachea or bronchus. Its main function is to maintain respiratory tract patency, positive pressure ventilation and removal of respiratory secretions. Endotracheal intubation and sputum suction are important parts of first aid and surgical anesthesia. Our team developed a magnetic navigation tracheal intubation and airway cleaning robot system to achieve mechanization and integration of surgical anesthesia, airway management. This study is designed to investigate the safety and efficacy of the Magnetic navigation tracheal intubation and airway cleaning robot.

Start: August 2020