Articles: anesthetics.
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Awake craniotomies with functional cortical mapping are performed to minimize post-operative deficits from the resection of lesions adjacent to eloquent cortex. The procedure is well-established in the adult patient population and is increasingly applied to well-selected pediatric patients. A review of recent literature demonstrated that the most commonly reported anesthetic techniques were "asleep-awake-asleep" protocols that relied on propofol, remifentanil, or fentanyl. ⋯ Awake craniotomies can safely be performed in the pediatric population with appropriate patient sel7ection, planning, and a multi-disciplinary approach.
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Journal of anesthesia · Feb 2025
Randomized Controlled TrialThe effect of intravenous lidocaine infusion on subarachnoid anesthesia in patients undergoing total knee replacement: a randomised controlled trial.
Intravenous lidocaine is a non-opioid analgesic adjunct for perioperative pain relief. The aim of our study was to explore whether concurrent administration of intravenous lidocaine prolongs the duration of sensory block during total knee replacement (TKR) under spinal anaesthesia. ⋯ During unilateral TKR under spinal anaesthesia, concurrent use of intravenous lidocaine prolonged sensory block and reduced postoperative analgesic requirements.
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Intravenous lidocaine is increasingly used as a nonopioid analgesic, but how it acts in the brain is incompletely understood. We conducted a functional MRI study of pain response, resting connectivity, and cognitive task performance in volunteers to elucidate the effects of lidocaine at the brain-systems level. ⋯ NCT05501600.
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Anesthesia and analgesia · Feb 2025
Observational StudyClinical Decision-Making and Process Complications During Anticipated Difficult Airway Management for Elective Surgery.
Difficult airway management (DAM) is a challenging aspect of anesthetic care. Although nearly all DAM episodes result in successful intubation, complications are common and clinical decision-making may be complex. In adults with anticipated DAM scheduled for nonemergent surgery, we prospectively observed clinical decisions made during DAM such as awake/sedated versus anesthetized, choice of initial and subsequent devices, case cancellation/postponement, conversions between awake and anesthetized approaches, and process complications such as multiple intubation/supraglottic airway (SGA) insertion attempts, difficult bag-mask ventilation (BMV), hypoxemia, and cardiovascular destabilization. ⋯ Airway management was successful in all patients and the incidence of process complications was higher than in routine airway management. Despite a high risk of DAM, 87% of patients were intubated anesthetized and conversions between awake and anesthetized approaches were rare. That patients intubated awake had more difficult airway indicators implies that clinicians reserve awake intubation for particularly difficult airways. The high incidence of multiple attempts, hypoxemia, and cardiovascular destabilization in patients intubated awake suggests that awake airway management remains challenging. We found no clear pattern in device choices after a first failed attempt. Patients with a first failed anesthetized intubation attempt and difficult BMV were at particularly high risk for hypoxemia.
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Recent evidence indicates that general anesthesia and sleep-wake behavior share some overlapping neural substrates. γ-Aminobutyric acid-mediated (GABAergic) neurons in the central amygdala have a high firing rate during wakefulness and play a role in regulating arousal-related behaviors. The objective of this study was to investigate whether central amygdala GABAergic neurons participate in the regulation of isoflurane general anesthesia and uncover the underlying neural circuitry. ⋯ The results suggest that central amygdala GABAergic neurons play a role in general anesthesia regulation, which facilitates behavioral and cortical emergence from isoflurane anesthesia through the GABAergic central amygdala-basal forebrain pathway.