Cholecystolithiasis Clinical Trial
Official title:
Dual-Loop Target Controlled Infusion of Propofol and Remifentanil Guided by Narcotrend Index in Laparoscopic Cholecystectomy
Laparoscopic Cholecystectomy applied to Artificial pneumoperitoneum and the extent of Surgical stimulation cause the wave of hemodynamics increase vigorously, which make it difficult to judge the depth of anesthesia according to traditional hemodynamics index such as heart rate and blood pressure.In case of this, the investigators design this research to study the Closed-Loop Target Controlled Infusion to anaesthesia of individualization guided by a Narcotrend index monitor in Laparoscopic Cholecystectomy.
Anesthetics alter electrocortical activity in a dose-dependent manner,and it is suggested that electroencephalographic(EEG)activity can provide a reliable basis for a surrogate measurement of hypnosis.An EEG monitor,the Narcotrend Index(NI),has proven useful to titrate hypnotic drugs.Because it is a single composite measure monitored continuously,it has been used in controlled studies to automatically guide propofol administration.Conversely,automated delivery systems for opioids have seldom been described using EEG activity There are no specific measures to quantify analgesia directly.Nevertheless,in the interaction between opioid-hypnotic synergy and loss of consciousness,when the dose of analgesic administered is sufficient to inhibit autonomic response to noxious stimuli,then the required hypnotic concentration is only that needed to achieve loss of consciousness.Moreover,a noxious stimulus such as laryngoscopy or periosteal pressure to the tibia may cause electrocortical activation with an increase in Narcotrend index,which indirectly reflects the analgesic state or the level of antinociception.Finally,an excitatory EEG arousal reaction resulting from nociceptive stimulation can provide a rational basis for analgesia administration.It can then be hypothesized that Narcotrend index could also be the controlled variable for opioid administration. ;
Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Supportive Care
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