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The aim of the study is to assess the accuracy of a new paradigm in measuring the level of nociception during lumbar surgery. The paradigm is based the measurement of the baroreflex in response to noxious stimuli in anesthetized patients.
The study aims at exploring the changes in the baroreflex induced by 3 noxious stimulation in anesthetized patients: tracheal intubation, tetanic stimulus, and surgical incision. Patients are randomly assigned to one of 2 groups: remifentanil-2 or remifentanil-4, corresponding to the target effect site concentration of this drug delivered through a TCI system. Other drugs included propofol and cisatracurium.
The paradigm exploring the baroreflex collects information continuously recorded of the RR intervals and the changes in systolic arterial pressure, before and during noxious stimuli. The hypothesis is that this paradigm explores nociception as the group with smaller doses in remifentanil will have more cardiovascular reactions in response to noxious stimuli.
Allocation: Randomized, Control: Active Control, Endpoint Classification: Pharmacodynamics Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Basic Science
University Hospital Grenoble
University Hospital, Grenoble
Published on BioPortfolio: 2014-08-27T03:17:55-0400
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A condition of persistent pain and discomfort in the BACK and the LEG following lumbar surgery, often seen in patients enrolled in pain centers.
Tapping of the subarachnoid space in the lumbar region, usually between the third and fourth lumbar vertebrae.
The lumbar and sacral plexuses taken together. The fibers of the lumbosacral plexus originate in the lumbar and upper sacral spinal cord (L1 to S3) and innervate the lower extremities.
A nerve originating in the lumbar spinal cord (usually L2 to L4) and traveling through the lumbar plexus to provide motor innervation to extensors of the thigh and sensory innervation to parts of the thigh, lower leg, and foot, and to the hip and knee joints.
A long flat muscle that extends along the whole length of both sides of the abdomen. It flexes the vertebral column, particularly the lumbar portion; it also tenses the anterior abdominal wall and assists in compressing the abdominal contents. It is frequently the site of hematomas. In reconstructive surgery it is often used for the creation of myocutaneous flaps. (From Gray's Anatomy, 30th American ed, p491)
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