Articles: anesthetics.
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Randomized Controlled Trial
A Placebo-Controlled Randomized Trial Comparing Oral Midazolam, Dexmedetomidine, and Gabapentin on Prophylaxis of Emergence Agitation After Sevoflurane Anesthesia in Adenotonsillectomy.
Sevoflurane causes emergence agitation (EA) in up to 80% of pediatric patients. ⋯ Premedication using oral midazolam, DEX, or gabapentin reduced the incidence of EA, and DEX provided the best sedation and hemodynamics of all.
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Anesthesia and analgesia · Jan 2025
Multicenter StudyIdentifying Variation in Intraoperative Management of Brain-Dead Organ Donors and Opportunities for Improvement: A Multicenter Perioperative Outcomes Group Analysis.
Intraoperative events and clinical management of deceased organ donors after brain death are poorly characterized and may consequently vary between hospitals and organ procurement organization (OPO) regions. In a multicenter cohort, we sought to estimate the incidence of hypotension and anesthetic and nonanesthetic medication use during organ recovery procedures. ⋯ Despite guidelines recommending maintenance of MAP >60 mm Hg in adult brain-dead organ donors, hypotension during recovery procedures was common. Future research is needed to clarify the relationship between intraoperative events with donation and transplantation outcomes and to identify best practices for the anesthetic management of brain-dead donors in the operating room.
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Paediatric anaesthesia · Jan 2025
Review Meta AnalysisPerioperative intravenous lignocaine for pediatric postoperative pain-A systematic review and meta-analysis.
Intravenous lignocaine has been used as an analgesic adjunct in pediatric surgical patients, although its efficacy is still unclear. ⋯ There is low quality evidence to suggest that perioperative intravenous lignocaine bolus followed by an infusion significantly reduced the opioid consumption on the first postoperative day in pediatric surgical patients. The effects of perioperative lignocaine on postoperative pain scores and the need for rescue analgesia are uncertain.
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Numerous, sometimes conflicting, changes in brain functional connectivity have been associated with the transition from wakefulness to unresponsiveness at induction of general anesthesia. However, relatively few studies have looked at the detailed time evolution of the transition, for different electroencephalogram (EEG) frequency bands, and in the clinical scenario of surgical patients undergoing general anesthesia. ⋯ Propofol-induced loss of consciousness in surgical patients is associated with a global breakdown in low-frequency directed functional connectivity, coupled with a high-frequency increase between closely located brain regions. At loss of consciousness, Granger causality shows more pronounced changes than coherence.
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Anesthesia and analgesia · Jan 2025
Observational StudyPermutation Entropy Does Not Track the Electroencephalogram-Related Manifestations of Paradoxical Excitation During Propofol-Induced Loss of Responsiveness: Results From a Prospective Observational Cohort Study.
During the anesthetic-induced loss of responsiveness (LOR), a "paradoxical excitation" with activation of β-frequencies in the electroencephalogram (EEG) can be observed. Thus, spectral parameters-as widely used in commercial anesthesia monitoring devices-may mistakenly indicate that patients are awake when they are actually losing responsiveness. Nonlinear time-domain parameters such as permutation entropy (PeEn) may analyze additional EEG information and appropriately reflect the change in cognitive state during the transition. Determining which parameters correctly track the level of anesthesia is essential for designing monitoring algorithms but may also give valuable insight regarding the signal characteristics during state transitions. ⋯ PeEn and beta ratio seem suitable parameters to monitor the state transition during anesthesia induction. The decreasing PeEn values suggest a reduction of signal complexity and information content, which may very well describe the clinical situation at LOR. The beta ratio mainly focuses on the loss of power in the gamma-band. PeEn, in particular, may present a single parameter capable of tracking the LOR transition without being affected by paradoxical excitation.