Anesthesia and analgesia
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Anesthesia and analgesia · Jan 2015
Randomized Controlled Trial Comparative StudyNicardipine Is Superior to Esmolol for the Management of Postcraniotomy Emergence Hypertension: A Randomized Open-Label Study.
Emergence hypertension after craniotomy is a well-documented phenomenon for which natural history is poorly understood. Most clinicians attribute this phenomenon to an acute and transient increase in catecholamine release, but other mechanisms such as neurogenic hypertension or activation of the renin-angiotensin-aldosterone system have also been proposed. In this open-label study, we compared the monotherapeutic antihypertensive efficacy of the 2 most titratable drugs used to treat postcraniotomy emergence hypertension: nicardipine and esmolol. We also investigated the effect of preoperative hypertension on postcraniotomy hypertension and the natural history of postcraniotomy hypertension in the early postoperative period. ⋯ Nicardipine is superior to esmolol for the treatment of postcraniotomy emergence hypertension. This type of hypertension is thought to be a transient phenomenon not solely related to sympathetic activation and catecholamine surge but also possibly encompassing other physiologic factors. For treating postcraniotomy emergence hypertension, nicardipine is a relatively effective sole drug, whereas if esmolol is used, rescue antihypertensive medications should be readily available.
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Anesthesia and analgesia · Jan 2015
Randomized Controlled TrialBlood/Gas Partition Coefficients for Isoflurane, Sevoflurane, and Desflurane in a Clinically Relevant Patient Population.
The blood/gas partition coefficient of a certain volatile anesthetic is of clinical importance because it determines its velocity of uptake into and elimination from the body of a patient and thus its pharmacokinetic behavior. To date, the blood/gas partition coefficients of isoflurane, sevoflurane, and desflurane have been measured in small numbers of subjects or in particular study groups, for example, healthy volunteers, patients experiencing a common kind of disease, or mothers immediately after giving birth. The objective of this study was to determine the blood/gas partition coefficients of these volatile anesthetics at 37°C in a larger clinically relevant and adult patient population. Furthermore, we tested whether age, gender, body mass index, hemoglobin concentration, or hematocrit had an influence on the coefficients. ⋯ The blood/gas partition coefficients of the modern volatile anesthetics, in particular, those of sevoflurane and desflurane, may be higher than that has been hitherto reported. Therefore, their uptake and elimination may occur more slowly in some patients than has been supposed. The blood/gas partition coefficients of isoflurane, sevoflurane, and desflurane measured in this study appear to be representative because they were determined in a clinically and numerically relevant patient cohort.
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Anesthesia and analgesia · Jan 2015
Randomized Controlled Trial Comparative StudyPropofol anesthesia for children undergoing magnetic resonance imaging: a comparison with isoflurane, nitrous oxide, and a laryngeal mask airway.
Both propofol infusions with oxygen delivered through nasal cannula and isoflurane/N2O (nitrous oxide) delivered via a laryngeal mask airway (LMA) are used to provide anesthesia for children undergoing magnetic resonance imaging scans. We compared the incidence of adverse events and perioperative physiologic responses in children anesthetized with these 2 regimens. ⋯ The frequency of adverse airway events during emergence and recovery after propofol infusion with oxygen by nasal cannula is less than with isoflurane/N2O/LMA in children.
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Anesthesia and analgesia · Jan 2015
Randomized Controlled TrialAn Acetate-Buffered Balanced Crystalloid Versus 0.9% Saline in Patients with End-Stage Renal Disease Undergoing Cadaveric Renal Transplantation: A Prospective Randomized Controlled Trial.
Recent studies have shown a decline in glomerular filtration rate and increased renal vasoconstriction after administration of normal saline when compared with IV solutions with less chloride. In this study, we investigated the impact of normal saline versus a chloride-reduced, acetate-buffered crystalloid on the incidence of hyperkalemia during cadaveric renal transplantation. The incidence of metabolic acidosis and kidney function were secondary aims. ⋯ The incidence of hyperkalemia differed by less than 17% between groups. Use of balanced crystalloid resulted in less hyperchloremia and metabolic acidosis. Significantly more patients in the saline group required administration of catecholamines for circulatory support.