Anesthesiology
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Comparative Study Clinical Trial
Effect of metoclopramide on gastric fluid volumes in diabetic patients who have fasted before elective surgery.
Diabetes-induced gastroparesis is believed to increase fasting gastric fluid volume before elective surgery. Metoclopramide is routinely administered preoperatively to reduce gastric fluid volume in these patients. This study compared nondiabetic controls to non-insulin-dependent and insulin-dependent diabetics to determine the effect of metoclopramide, administered before surgery, on gastric volumes in patients who fasted before surgery. ⋯ In elective surgical patients who have fasted before surgery, gastric volumes are minimal, even in diabetics with severe neuropathic symptoms. Metoclopramide prophylaxis to reduce gastric volumes seems to be unnecessary unless the patient has a prolonged history of poor blood glucose control.
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Several studies have recognized neuromuscular blocking agents as the most common cause of anaphylaxis during general anesthesia, but the reported frequencies vary considerably between countries. In Norway, the issue has raised special concern because of reports from the Norwegian Medicines Agency that suggest a high prevalence. This article presents the results from a standardized allergy follow-up examination of 83 anaphylactic reactions related to general anesthesia performed at one allergy center in Bergen, Norway. ⋯ Neuromuscular blocking agents were the dominating antigens causing immunoglobulin E-mediated anaphylaxis in this study. The data could not be used for estimation of the incidence of allergy toward neuromuscular blocking agents in Norway. Larger patient samples, standardization of reporting, and diagnostic protocols should be pursued by network formation to produce data more suitable for epidemiologic research.
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Comparative Study
Intravenous versus nebulized ceftazidime in ventilated piglets with and without experimental bronchopneumonia: comparative effects of helium and nitrogen.
Lung deposition of intravenous cephalosporins is low. The lung deposition of equivalent doses of ceftazidime administered either intravenously or by ultrasonic nebulization using either nitrogen-oxygen or helium-oxygen as the carrying gas of the aerosol was compared in ventilated piglets with and without experimental bronchopneumonia. ⋯ Nebulization of ceftazidime induced a 5- to 30-fold increase in lung tissue concentrations as compared with intravenous administration. Using a helium-oxygen mixture as the carrying gas of the aerosol induced a substantial additional increase in lung deposition in noninfected piglets but not in piglets with experimental bronchopneumonia.
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Acupuncture and related techniques are increasingly practiced in conventional medical settings, and the number of patients willing to use these techniques is increasing. Despite more than 30 yr of research, the exact mechanism of action and efficacy of acupuncture have not been established. Furthermore, most aspects of acupuncture have yet to be adequately tested. ⋯ However, preoperative sedation seems to be a promising application of acupuncture in perioperative settings. Acupuncture may be effective for postoperative pain relief but requires a high level of expertise by the acupuncture practitioner. Acupuncture and related techniques can be used for treatment and prophylaxis of postoperative nausea and vomiting in routine clinical practice in combination with or as an alternative to conventional antiemetics when administered before induction of general anesthesia.
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Preoperative smoking cessation has been suggested to be effective in reducing various postoperative complications. However, the optimal duration of preoperative smoking cessation for reducing wound complications is unclear. ⋯ Preoperative smoking abstinence of longer than 3 weeks reduces the incidence of impaired wound healing among patients who have undergone reconstructive head and neck surgery.