View clinical trials related to Propofol.
Filter by:The aim of this study is to determine whether ALDH2 gene polymorphisms (G/G, G/A A/A) have effect on the potency of propofol.
120 consecutive female patients, 18-65 years old, American Society of Anesthesiologists (ASA) physical status I to II, scheduled for hysteroscopic surgery under propofol-based intravenous anesthesia will be recruited in this cohort study. The day before surgery, participants will be assessed the state of preoperative anxiety and depression. On the day of surgery, propofol will be administered by target controlled infusion (TCI) pump. During induction of anesthesia, the level of sedation will be evaluated. The induction dose of propofol, target effect-site concentration(Cet), plasma concentration(Cp) and effect-site concentration (Ce) of propofol will be recorded.
To investigate the effect of sevoflurane and propofol on the concentrations of serum homocysteine and folic acid in children who received cochlear implant surgery.
In order to determine the speed of onset of the anaesthetic propofol in children, investigators will compare the two age groups 1-6 years vs 8-13 years. The primary outcome measure is the time to peak effect of a bolus of proposal, which is measured by analysing the electroencephalogram by using the permutation entropy. Further pharmacodynamic modelling will enable investigators to quantify the difference with age in the hypnotic effect of propofol.
The investigators will perform clinical studies to test the hypothesis that participants who have total hip/knee replacement under sevoflurane, propofol or desflurane anesthesia will have different effects on the incidence and severity of POD/POCD, and POD/POCD is associated with retinal nerve fiber layer (RNFL) thickness, as well as Serum level of vitamin B12, folic acid, homocysteine and human myeloid differentiation protein-2 (MD-2s). The investigators plan to perform the studies in 300 participants at Shanghai 10th People's Hospital.
Delirium occurs commonly in elderly patients. Its incidence after orthopedic surgery has been reported to be 5-61%. Delirium is classified into three sub-types: Hypoactive, hyperactive, and mixed. Although hyperactive delirium is not as common as hypoactive delirium, the abnormal behavior pattern of hyperactive delirium, such as agitation, confusion, or aggressiveness, is considered to be harmful to patients and medical personnel. Thus, it is important to promptly manage such behaviors associated with hyperactive delirium. Intraoperative sedation plays an important role in relieving anxiety or stress response of patients. Propofol-a common sedative agent-was reported to cause delirium more frequently, compared with dexmedetomidine, in post-cardiac surgery patients or mechanically-ventilated patients in the intensive care unit (ICU). In addition to the benefits of reducing opioid consumption and postoperative nausea/vomiting, dexmedetomidine is most often used for ICU sedation or procedural sedation. However, there has not been any prospective randomized study investigating how intraoperative dexmedetomidine sedation during regional anesthesia affects postoperative consciousness, perception, memory, behavior, emotion, and so on. In this study, based on the hypothesis that intraoperative dexmedetomidine sedation may reduce the incidence of abnormal psycho-motor behavior compared with propofol sedation, investigators prospectively will investigate the incidence of postoperative delirium in elderly patients who undergo orthopedic surgery with regional anesthesia.
Sevoflurane and propofol are the most popular drug choices for maintenance of general anaesthesia for caesarean section. However, effects of these two anesthetics on maternal and fetal outcomes after caesarean section haven't been compared directly. The aim of this study is to compare the effects of sevoflurane and propofol as maintenance of general anesthesia, and to try to determine which anesthetic is better for maternal and fetal outcomes after caesarean section.
Although propofol is widely used as an induction agent for a general anesthesia, it can induce a profound hypotension, which leads to the hypo-perfusion of end organs and eventually increases morbidities. Theoretically, applying Trendelenburg position (head down and leg up position) increases cardiac preloads and cardiac outputs. However, in past researches, changing to Trendelenburg position alone is not enough and does not prevent propofol induced hypotension. Previous studies proved that leg wrapping effectively prevent hypotension after neuraxial anesthesia during Cesarean section. The leg wrapping prevents hypotension by increasing vascular resistance of lower extremities. The investigators made a hypothesis that applying both Trendelenburg position and leg wrapping prevent propofol induced hypotension more effectively than either applying Trendelenburg position only or taking no preventive measures.
Endoscopic examinations and particularly long-lasting interventions can be uncomfortable for patients. Pain and vasovagal reactions are common. Therefore, the implementation is generally recommended under sedation and also carried out in practice here. The vital signs monitoring to avoid complications is dictated by current national guidelines. Necessary measures of monitoring include pulse oximetry and blood pressure measurements. In patients with severe heart disease an ECG recording should be used additionally. Moreover, the guidelines require that the sedation is clinically monitored continuously to avoid an unwanted anesthetic stage. Such evaluation, however, is often difficult under clinical conditions and even counterproductive, since a constant response and tactile stimulation of the patient (to check clinically the depth level of sedation ), interrupts endoscopic complex intervention. However, clinical most relevant aspect is the avoidance of unrecognized transition of patients from the stage of deep sedation in an anesthetic stage. Current recommendations do not take into account new study results from a gender perspective, which showed that women and men need a different wake-up time using the EEG derivation means by using the Narcotrend after total intravenous anesthesia, which may be due to different total doses of sedatives needed. However, the research group has been demonstrated in a previous study that most likely caused by the use of EEG monitoring (Narcotrend) an effective adaptation of sedation, in particular a more rapid recovery time by a lower dose of the administered sedative for a continuous sedation stage D0-D2 endoscopic retrograde cholangiopancreatography-(ERCP). In the presented study the investigators evaluate the extent of gender differences in the wake-up time after sedation with propofol during colonoscopy when using EEG monitoring.
1. Adequate sedation with classical sedative agents, propofol 2. Sedation with propofol may induce paradoxical excitement response in heavy alcohol drinkers 3. Dexmedetomidine, α2 receptor agonist, may provide adequate sedation in heavy alcohol drinkers