Canadian journal of anaesthesia = Journal canadien d'anesthésie
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Randomized Controlled Trial Comparative Study
The catheter-over-needle assembly facilitates delivery of a second local anesthetic bolus to prolong supraclavicular brachial plexus block without time-consuming catheterization steps: a randomized controlled study.
Single-shot delivery of a supraclavicular brachial plexus block is effective for providing outpatient surgical anesthesia; however, patients generally must use oral analgesics to control pain shortly after discharge from the hospital. Catheterized delivery of supraclavicular blocks can be challenging to perform. We aimed to show that administering a second postoperative bolus of local anesthetic through a catheter placed by a catheter-over-needle assembly not only avoids time-consuming steps but also provides an extended analgesic effect compared with the traditional single-shot approach. ⋯ Using the catheter-over-needle assembly for supraclavicular brachial plexus block facilitated effective delivery of a supplementary bolus of local anesthetic without extending the time to perform the block or increasing the number of steps. It also prolonged analgesia significantly compared with the single-shot approach. This trial was registered at: ClinicalTrials.gov, ID: NCT01522066.
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Randomized Controlled Trial Comparative Study
Factors that influence the selection of sterile glove brand: a randomized controlled trial evaluating the performance and cost of gloves.
To determine whether glove use modifies tactile and psychomotor performance of health care providers when compared with no glove use and to evaluate factors that influence the selection of sterile glove brand. ⋯ Given the observed similarities in touch sensitivity and psychomotor performance associated with five different glove types, our results suggest that subjective provider preferences, such as glove comfort, should be balanced against material costs.
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Multicenter Study Clinical Trial
Corticosteroid use in the intensive care unit: a survey of intensivists.
The efficacy of systemic corticosteroids in many critical illnesses remains uncertain. Our primary objective was to survey intensivists in North America about their perceived use of corticosteroids in clinical practice. ⋯ Respondents reported rarely prescribing corticosteroids for ALI, but accepted them for bronchospasm, suspected adrenal insufficiency due to previous corticosteroid use, and vasopressor-refractory septic shock. These competing indications will complicate the design and interpretation of any future large-scale trial of corticosteroids in critical illness.
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Comparative Study
Proximal aortic compliance and diastolic function assessed by speckle tracking imaging.
Speckle tracking imaging (STI) is a recent technique that evaluates an echocardiographic image throughout the cardiac cycle and provides dynamic variables such as tissue velocities and strain rates. The objective of our study was to determine 1) if STI can be used to quantify proximal aortic compliance and 2) if decreased aortic compliance determined by STI will reproduce the previously reported correlation with diastolic function. ⋯ Speckle tracking can be used to describe the physical motion of the aortic wall and to calculate its compliance. We confirm that variation in diastolic function can be attributed, in part, to aortic compliance. Our novel approach of measuring compliance throughout the cardiac cycle, isolating radial and longitudinal contributions, and evaluating previously obtained images retrospectively provides advantages over previously reported measures of aortic compliance. Speckle tracking promises new insights into ventricular function, aortic mechanics, and the interaction between these structures.