منابع مشابه
Noxious stimulation response index: a novel anesthetic state index based on hypnotic-opioid interaction.
BACKGROUND The noxious stimulation response index (NSRI) is a novel anesthetic depth index ranging between 100 and 0, computed from hypnotic and opioid effect-site concentrations using a hierarchical interaction model. The authors validated the NSRI on previously published data. METHODS The data encompassed 44 women, American Society of Anesthesiology class I, randomly allocated to three grou...
متن کاملPupillary response to noxious stimulation during isoflurane and propofol anesthesia.
We studied the effects of noxious stimuli on arterial blood pressure, heart rate, pupil size, and the pupillary light reflex in 13 volunteers anesthetized with either isoflurane or propofol. Those given isoflurane (n = 8) were anesthetized twice, in a randomly selected order, once at an end-tidal concentration of 0.8% and once at 1.2%. An intense noxious stimulus was provided by electrical stim...
متن کاملAge-related and sex-related changes in perfusion index in response to noxious electrical stimulation in healthy subjects
BACKGROUND Even though pain is a subjective phenomenon, its objective evaluation in humans is important because subjects requiring pain evaluation may be unable to describe their pain intensity because of decreased awareness or impaired cognitive function. Previous reports indicate that the perfusion index (PI), which is calculated from pulse oximeter waveforms, has some utility in assessing pa...
متن کاملChanges in the Bispectral Index in Response to Experimental Noxious Stimuli in Adults under General Anesthesia
Objective. Pain assessment is a major challenge in nonverbal patients in the intensive care unit (ICU). Recent studies suggest a relationship between the Bispectral Index (BIS) and nociceptive stimuli. This study was designed to examine changes in BIS in response to experimental noxious stimuli. Methods. Thirty participants under general anesthesia were in this quasiexperimental, within subject...
متن کاملOptimal echo time for functional MRI of the infant brain identified in response to noxious stimulation
PURPOSE Blood oxygen level dependent (BOLD) brain activity, measured using functional MRI (fMRI), is dependent on the echo time (TE) and the reversible spin-spin relaxation time constant ( T2*) that describes the decay of transverse magnetization. Use of the optimal TE during fMRI experiments allows maximal sensitivity to BOLD to be achieved. Reports that T2* values are longer in infants (due t...
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ژورنال
عنوان ژورنال: Anesthesiology
سال: 2010
ISSN: 0003-3022
DOI: 10.1097/aln.0b013e3181d40368