Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · Apr 2013
Case ReportsAtypical upswing at initial part of phase III in capnograms due to technical cause.
We sporadically experienced three paediatric cases of atypical upswing at the initial part of phase III in the capnograms via side-stream capnometer immediately following endotracheal intubation and mechanical ventilation. No fault was found in the monitor or anaesthetic system including breathing circuits, carbon dioxide (CO2 ) sampling tube, water trap, and unidirectional valves. The upsurge of CO2 disappeared with increasing the respiratory rate; however, it reappeared with decreasing the respiratory rate and vice versa. We experimentally reproduced the phenomenon of overshooting CO2 measurement after the luer lock connection of the sample gas line at the water trap had been unscrewed a little bit.
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Acta Anaesthesiol Scand · Apr 2013
Randomized Controlled Trial Comparative StudyA comparison of oxycodone prolonged-release vs. oxycodone + naloxone prolonged-release after laparoscopic hysterectomy.
Targiniq®, an oxycodone prolonged-release (PR) formulation combined with the opioid antagonist naloxone PR, aims to prevent opioid-induced constipation without impairing the analgesic efficacy. This has been confirmed during prolonged use in chronic pain or cancer patients. The purpose of our study was to compare clinical effects of oxycodone PR with oxycodone PR + naloxone PR for short-term post-operative pain management. ⋯ Addition of naloxone to oxycodone PR tablets in a pain regimen administered twice daily the first three post-operative days had no significant clinical effects on constipation or other variables during the first week after hysterectomy.
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Acta Anaesthesiol Scand · Apr 2013
Review Meta AnalysisPrevention of post-dural puncture headache in parturients: a systematic review and meta-analysis.
Post-dural puncture headaches (PDPHs) present an important clinical problem. We assessed methods to decrease accidental dural punctures (ADPs) and interventions to reduce PDPH following ADP. Multiple electronic databases were searched for randomised clinical trials (RCTs) of parturients having labour epidurals, in which the studied intervention could plausibly affect ADP or PDPH, and the incidence of at least one of these was recorded. ⋯ Special Sprotte needles, epidural morphine, and cosyntropin are thus far each supported by a single, albeit good quality trial. Prophylactic blood patches are supported by three trials, but these had flawed methodology. Mostly, trials were of limited quality, and further well-conducted, large studies are needed.
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Acta Anaesthesiol Scand · Apr 2013
ReviewAn ethical analysis of proxy and waiver of consent in critical care research.
It is a central principle in medical ethics that vulnerable patients are entitled to a degree of protection that reflects their vulnerability. In critical care research, this protection is often established by means of so-called proxy consent. ⋯ If this is not fulfilled because the research is to be conducted under circumstances where the proxy is unavailable, adequate protection of the patient must be ensured by other means. Thus, the research must be designed specifically to benefit critically ill patients, and the incremental non-therapeutic risk must only comprise a minimal risk.
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Acta Anaesthesiol Scand · Apr 2013
Antagonistic effect of flumazenil after midazolam sedation on arterial-cardiac baroreflex.
Flumazenil is generally administered to antagonise the sedative effect of midazolam. However, although flumazenil completely antagonises the sedative effect of midazolam, a few effects remain unantagonised. Hence, it is unclear whether flumazenil restores the attenuation of the arterial-cardiac baroreflex (i.e. arterial-heart rate reflex) induced by midazolam. We investigated the antagonistic effect of flumazenil administered after midazolam on cardiac baroreflex, to reveal whether complete recovery from midazolam-induced sedation by flumazenil administration is accompanied by restoration of midazolam's attenuating effects on the cardiac baroreflex. ⋯ The present results suggest that complete recovery from midazolam sedation by flumazenil is accompanied by restoration of the attenuated cardiac baroreflex function induced by midazolam.