Anesthesia and analgesia
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Mask ventilation is the most fundamental skill in airway management. In this review, we summarize the current knowledge about difficult mask ventilation (DMV) situations. Various definitions for DMV have been used in the literature. ⋯ These signs should, therefore, be recognized and documented during the preoperative evaluation. DMV can be even more challenging in infants and children, because they develop hypoxemia much faster than adults. Finally, difficult tracheal intubation is more frequent in patients who experience DMV, and thus, clinicians should be familiar with the corrective measures and management options when faced with a challenging, difficult, or impossible mask ventilation situation.
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Anesthesia and analgesia · Dec 2009
Improvement in psychosocial outcomes in chronic pain patients receiving intrathecal morphine infusions.
When conventional multimodal analgesic therapy is unsuccessful, more aggressive analgesic treatments are required for patients with intractable chronic pain. Despite extensive clinical experience with implanted morphine pumps, there is still controversy regarding the psychosocial effects of this invasive analgesic therapy. In this prospective study, we evaluated the impact of intrathecal (IT) morphine infusions on pain perception and psychosocial functionality. A secondary objective of this pilot study was to assess the effect of IT morphine infusion on the patient's level of functional activity. ⋯ IT infusion of morphine using an implantable pump was helpful in improving psychosocial function in patients with intractable pain that had failed to respond to standard multimodal analgesic therapy.
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Anesthesia and analgesia · Dec 2009
Randomized Controlled Trial Comparative StudyThe effects of crystalloid and colloid preload on cardiac output in the parturient undergoing planned cesarean delivery under spinal anesthesia: a randomized trial.
Hypotension after spinal anesthesia for cesarean delivery remains a major clinical problem. Fluid preloading regimens together with vasopressors have been used to reduce its incidence. Previous studies have used noninvasive arterial blood pressure measurement and vasopressor requirements to evaluate the effect of preload. We used a suprasternal Doppler flow technique to measure maternal cardiac output (CO) and corrected flow time (FTc, a measure of intravascular volume) before and after spinal anesthesia after 3 fluid preload regimens. We hypothesized that colloid solutions, compared with crystalloid, would produce the largest increase in CO and have the lowest incidence of hypotension. ⋯ Despite CO and FTc increases after fluid preload, particularly with HES 1.0 L, hypotension still occurred. The data suggest that CO increases after these preload regimens cannot compensate for reductions in arterial blood pressure after spinal anesthesia.
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Anesthesia and analgesia · Dec 2009
Review Meta AnalysisEpidural space identification: a meta-analysis of complications after air versus liquid as the medium for loss of resistance.
The best method for identifying the epidural space for neuraxial blocks is controversial. We conducted this meta-analysis to test the hypothesis that loss of resistance with liquid reduces complications with epidural placement. ⋯ Larger studies that overcome limitations of heterogeneity across studies and a relatively infrequent occurrence of complications are required to determine the optimal medium for loss of resistance during epidural block.