Journal of neurosurgical anesthesiology
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J Neurosurg Anesthesiol · Jul 2024
Neonatal Diazepam Exposure Decreases Dendritic Arborization and Spine Density of Cortical Pyramidal Neurons in Rats.
Benzodiazepines are extensively utilized in pediatric anesthesia and critical care for their anxiolytic and sedative properties. However, preclinical studies indicate that neonatal exposure to GABAergic drugs, including benzodiazepines, leads to long-term cognitive deficits, potentially mediated by altered GABAergic signaling during brain development. This preclinical study investigated the impact of early-life diazepam exposure on cortical neuronal morphology, specifically exploring dendritic arborization and spine density, crucial factors in synaptogenesis. ⋯ Neonatal diazepam exposure adversely affected cortical pyramidal neuron development, leading to persistent alterations in dendritic arborization and spine density. These structural changes suggest potential risks associated with early-life diazepam exposure. Further research is needed to unravel the functional consequences of these anatomic alterations.
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J Neurosurg Anesthesiol · Jul 2024
ReviewA Reappraisal of the Pathophysiology of Cushing Ulcer: A Narrative Review.
In 1932, Harvey Cushing described peptic ulceration secondary to raised intracranial pressure and attributed this to vagal overactivity, causing excess gastric acid secretion. Cushing ulcer remains a cause of morbidity in patients, albeit one that is preventable. This narrative review evaluates the evidence pertaining to the pathophysiology of neurogenic peptic ulceration. ⋯ Alternations in the gut microbiome in patients with severe traumatic brain injury include colonization with commensal flora associated with peptic ulceration. The brain-gut-microbiome axis integrates the central nervous system, the enteric nervous system, and the immune system. Following the review of the literature, we propose a novel hypothesis that neurogenic peptic ulcer may be associated with alterations in the gut microbiome, resulting in gastrointestinal inflammation leading to ulceration.
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J Neurosurg Anesthesiol · Jul 2024
Meta AnalysisRisk Factors for Postanesthetic Emergence Delirium in Adults: A Systematic Review and Meta-analysis.
Emergence delirium (ED) is delirium that occurs during or immediately after emergence from general anesthesia or sedation. Effective pharmacological treatments for ED are lacking, so preventive measures should be taken to minimize the risk of ED. However, the risk factors for ED in adults are unclear. ⋯ Postoperative risk factors were indwelling urinary catheters, the presence of a tracheal tube in the postanesthetic care unit or intensive care unit, the presence of a nasogastric tube, and pain. Knowledge of these risk factors may guide the implementation of stratified management and timely interventions for patients at high risk of ED. The majority of studies included in this review investigated only hyperactive ED and further research is required to determine risk factors for hypoactive and mixed ED types.
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J Neurosurg Anesthesiol · Jul 2024
Multicenter StudyBlood Pressure Management Goals in Critically Ill Aneurysmal Subarachnoid Hemorrhage Patients in Australia and New Zealand.
Blood pressure (BP) management is common in patients with aneurysmal subarachnoid hemorrhage (SAH) admitted to an intensive care unit. However, the practice patterns of BP management (timing, dose, and duration) have not been studied locally. ⋯ BP management goals are commonly 'prescribed' to aSAH patients admitted to an intensive care unit in Australia and New Zealand, but BP management goal setting was not associated with improved outcomes in the adjusted analysis.
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J Neurosurg Anesthesiol · Jul 2024
Randomized Controlled TrialAdding Ketamine to Epidural Morphine Does Not Prolong Postoperative Analgesia After Lumbar Laminectomy or Discectomy.
Epidural opioids provide effective postoperative analgesia after lumbar spine surgery. Ketamine has been shown to reduce opioid-induced central sensitization and hyperalgesia. We hypothesized that adding ketamine to epidural opioids would prolong the duration of analgesia and enhance analgesic efficacy after lumbar spine surgery. ⋯ The addition of ketamine to epidural morphine did not prolong the duration of analgesia after lumbar laminectomy.