AANA journal
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Aortic valve replacement (AVR) is a common surgical intervention for symptomatic aortic stenosis. For many high-risk patients with severe symptomatic aortic stenosis, AVR is not an option. ⋯ AVB is an alternative to AVR that avoids median sternotomy, cardiopulmonary bypass, cross clamping the aorta, manipulation of the native aortic valve, and aortic cannulation. This case summary reviews the anesthetic management of a patient undergoing AVB.
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Although anesthetists have long assumed that ketamine's role in neuroanesthesia is limited because of its association with increased intracranial pressure, this article presents a review of recent clinical literature suggesting otherwise. When ketamine is used as an adjuvant anesthetic agent along with mechanical ventilation to maintain normocapnia, ketamine does not have adverse cerebral hemodynamic effects. ⋯ Caution must be exercised because of ketamine's action at the N-methyl-D-aspartate receptor (NMDAR), as ketamine may antagonize both neuroprotective and neurodestructive NMDAR-mediated pathways. Still, ketamine may prove to be a safe part of a neuroanesthetic regimen, and it should no longer be considered absolutely contraindicated as a result of its cerebral hemodynamic effects.
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Morbid obesity is a relatively common and vastly increasing condition that can have a profound impact on morbidity and mortality during the administration and maintenance of general and regional anesthesia. Physiological derangements, difficult airway management, and biological augmentation in pharmacokinetics are some of the clinical challenges involved with this particular patient population. This case report discusses the advantages of regional versus general anesthesia in the morbidly obese patient population, in conjunction with an analysis of the various types of spinal anesthetics. This will be followed by a focused discussion related to the management of a morbidly obese patient undergoing a nonelective orthopedic procedure.
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Randomized Controlled Trial Comparative Study
Ease of intubation with the Parker Flex-Tip or a standard Mallinckrodt endotracheal tube using a video laryngoscope (GlideScope).
Two endotracheal tubes (ETTs) are available for use in operative suites for intubation: the Parker Flex-Tip (PFT, Parker Medical) and the standard Mallinckrodt (Covidien). To the authors' knowledge, no study has compared these 2 ETTs with each other when the anesthesia provider uses the GlideScope video laryngoscope (Verathon) for intubation. The purpose of the study was to determine if there are differences related to ease of intubation reported by anesthesia providers who use the PFT tube compared with the standard tube while using the GlideScope. ⋯ The PFT tube in suboptimal conditions demonstrated a significantly greater ease of intubation, as measured by decreased time for ETT insertion and greater ease of ETT insertion score. The number of redirections at the glottis to intubate the trachea once the glottis was visualized was not statistically different. Based on the findings from this study, anesthesia providers may want to consider the use of the PFT tube when using the GlideScope to promote ease of intubation.