British journal of anaesthesia
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Biography Historical Article Classical Article
Postoperative analgesia and lung function: a comparison of morphine with extradural block. 1971.
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Randomized Controlled Trial Clinical Trial
Effect of infiltration with ropivacaine on blood loss during reduction mammoplasty.
Ropivacaine is a new aminoamide local anaesthetic agent. Unlike other agents in its class, such as bupivacaine, it has been found to be vasoconstrictive. We have sought to investigate if this property is clinically useful and may reduce surgical blood loss. ⋯ There was no significant difference between the two regimens for duration of surgery or amount of tissue excised; however, ropivacaine was associated with markedly greater intraoperative blood loss than bupivacaine (median 696 (range 305-1366) ml kg-1 vs 300 (169-608) ml kg-1; P = 0.04, Wilcoxon rank sum test). Postoperative blood loss was not significantly different between groups (116 (14-173) ml kg-1 vs 98 (13-332) ml kg-1; P = 0.69, Wilcoxon rank sum test). We conclude that the vasoconstrictive properties of ropivacaine were not sufficiently great to merit its use as a sole agent for infiltration before reduction mammoplasty.
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Randomized Controlled Trial Clinical Trial
Tenoxicam and paracetamol-codeine combination after oral surgery: a prospective, randomized, double-blind, placebo-controlled study.
We studied 90 adults undergoing surgical removal of at least both lower third molar teeth as day cases under standardized general anaesthesia. Patients were allocated randomly (with stratification for surgeon) to receive tenoxicam 40 mg, tenoxicam 20 mg or placebo i.v. at induction of anaesthesia and orally (effervescent tablets) with food on each of the subsequent 2 days. Panadeine (paracetamol 500 mg-codeine 8 mg) was given before operation and was available as needed for pain thereafter, to a limit of two tablets every 4 h. ⋯ Over the 6-day period, patients who received tenoxicam reported less pain on rest (area under the curve; P < 0.05) and less disturbance in sleep (P < 0.01) even though they used fewer Panadeine tablets (P < 0.05). Differences between tenoxicam 40 mg and 20 mg were not significant. There was no significant difference in nefopam requirements or side effects, and no adverse event attributable to the study medication.
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Randomized Controlled Trial Comparative Study Clinical Trial
Intranasal midazolam for premedication of children undergoing day-case anaesthesia: comparison of two delivery systems with assessment of intra-observer variability.
Midazolam is often used for paediatric premedication. We have compared two methods of administering midazolam intranasally in 44 surgical day-case children allocated randomly to receive midazolam 0.2 mg kg-1 as drops or midazolam 0.1 mg kg-1 from an intranasal spray device. Behaviour was recorded on a four-point scale by the parent, nurse and anaesthetist. ⋯ There was no significant difference in the assessments between observers. Midazolam by either method was equally effective but acceptability of the premedication was poor in both groups. Intranasal midazolam cannot be recommended as a method for routine premedication of young children.
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Randomized Controlled Trial Comparative Study Clinical Trial
Comparison of the myocardial effects of desflurane and isoflurane in healthy patients: assessment by continuous oesophageal aortic blood flow echo-Doppler.
Experimentally, desflurane causes a moderate positive inotropic effect and a transient increase in arterial pressure with rapid increases in concentration compared with isoflurane. We used a continuous oesophageal aortic blood flow echo Doppler device to study the myocardial effects of equi-anaesthetic concentrations of isoflurane and desflurane in 32 healthy patients undergoing superficial surgery. After induction of anaesthesia with midazolam, etomidate and fentanyl general anaesthesia was maintained in 16 patients with 0.6% end-expired concentration of isoflurane and in 16 patients with 3% end expired concentration of desflurane. ⋯ The maximal decrease in ABF reached 71 (15)% of its initial value in the desflurane group compared with 80 (14)% in the isoflurane group (ns). Neither agent caused significant changes in other variables except for PE'CO2 which decreased in both groups. Continuous ABF echo-Doppler monitoring demonstrated an early transient positive inotropic effect of desflurane.