View clinical trials related to Anesthesia.
Filter by:The study purpose is to compare the effect of different Administration Routes of Pediatric Premedication (including oral administration, intramuscular injection, rectal perfusion, intranasal).
The study try to illustrate the possible mechanisms of tending to induce airway spasms and the impact of dexmedetomidine on inflammatory reaction in general anesthesia patients with asthma，by detecting the differences of plasma inflammatory factor interleukin(IL)-4, IL-5, IL-13, IL-17, IL-33, MBP and immunoglobulin E(IgE) levels between asthma patients and non-asthma patients.
Emergence from sedation involves an increase in both the level of consciousness and arousal. Some insight to the neural core of consciousness was gained in the recent past. Our research objective is to characterize for the first time the spatiotemporal mobilization of the ascending reticular activating system during emergence from sedation; stated otherwise - to capture the neural core of arousal. To achieve this objective we plan to utilize the advanced imaging modality of EEG-fMRI. In short, volunteers will be placed in the MRI. Following baseline recordings they will be sedated with a continuous drip of propofol, titrated to deep sedation. Once in that sedation level, propofol administration will cease until emerging to an awake-calm/light sedation. Continuous EEG recordings and fMRI scans will be taken, both task specific (auditory oddball) and resting-fMRI. Analyses will focus (but will not be restricted to) on constituents of the ascending reticular activating system. The expected advances of this proposal are: 1. Emergence from sedation (and anesthesia) is one of the critical stages and least elucidated area in the practice of anesthesia. Delayed awakening of varying degree is not uncommon after anesthesia and may have a number of different causes, individual or combined, which may be both drug or non-drug related, thus causing a diagnostic dilemma. Eventually - better insight into this subject will lead to better clinical practice and better understanding why patients emerge in such a diverse and sometimes unexpected manner. 2. Knowledge of the internal structure underlying arousal from anesthesia will help develop / upgrade brain monitors that could tell the anesthesiologist the patient's level of consciousness and prediction of arousal. 3. A detailed reproducible mapping of the arousal process may serve as the core of a drug screening platform for drugs that may expedite patient arousal. 4. Elucidation of the arousal paradigm from sedation will enhance our knowledge of physiological sleep. Research hypothesis Return of consciousness is a complex phenomenon comprising of interplay between the cortex and deeper brain structures. We hypothesize that the activation signature is conserved and similar between subjects. Furthermore, we hypothesize that inter-subject variability will arise mainly in the time domain, as evident from the clinical observation of variable time to emergence in different patients.
The investigators want to evaluate the efficacy of the propofol and sevoflurane for the prevention of catheter-related bladder discomfort.
To explore the feasibility of different doses of etomidate admixed with propofol in induced abortion: a randomized, double blind controlled trial.
To explore the effect of induction and maintenance of anesthesia with etomidate on hemodynamics and oxidative stress in diabetic patients.
The purpose of this study is to evaluate the latency period (timing between the injection of the local anesthetic and the onset of complete sensory nerve block) of two approaches for ultrasound-guided popliteal sciatic nerve block: One of the approaches is the injection of the anesthetic just at the site of the bifurcation of the sciatic nerve and the other one is injecting the local anesthetic at least 2 cm beyond the bifurcation of the aforementioned nerve. Our main hypothesis is that the first approach will decrease the latency period, and probably, will increase the success rate of the nerve block as well as patient satisfaction.
This study is intended to evaluate the effect of decreasing the maximum plasma concentration target of remifentanil of the Target Controlled Infusion system on the the incidence of major and minor side-effects.
Although data on cardioprotective effects (as profile of troponin I)of perioperative maintenance of normothermia during CABGs are already known, little is known about the effects of maintaining normothermia on clinical outcomes of patients submitted to coronary surgery. Being acute renal failure (ARF) and atrial fibrillation (AF) the two most frequent complications of this surgery, this study compare as primary end point the rate of postoperative ARF and AF in two group of patients, one actively warmed with Thermowrap and the control group receiving standard institutional care.