Anaesthesia and intensive care
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Anaesth Intensive Care · Oct 2004
Review Comparative StudyThe single-connector technique for initial placement of double-lumen tubes.
Due to the presence of major lung or extra-pulmonary pathology, which may be unilateral or bilateral, the initial placement of a double-lumen tube is not always straightforward. Although fibreoptic bronchoscopy is often used to confirm "correct" placement, a "blind" technique is frequently used for the initial insertion. ⋯ On a purely "number of steps" basis, the single-connector approach has several advantages. Furthermore, use of a technique that involves bronchial cuff inflation and single-lung ventilation as a first manoeuvre may reduce the risk of a temporarily malplaced double-lumen tube creating a potentially harmful ball-valve effect in a partially obstructed lobe or lung.
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Anaesth Intensive Care · Oct 2004
Randomized Controlled Trial Clinical TrialGum elastic bougie-guided insertion of the ProSeal Laryngeal Mask Airway.
We tested the hypothesis that gum elastic-bougie-guided insertion of the ProSeal Laryngeal Mask Airway is more frequently successful than introducer tool guided insertion after failed digital insertion. One hundred anaesthetized patients (ASA 1-2, aged 18 to 80 years) were randomized for the second insertion attempt using either the gum elastic bougie-guided or introducer tool techniques. The bougie-guided technique involved priming the drain tube with the bougie, placing the bougie in the oesophagus using laryngoscope guidance, digital insertion along the palato-pharyngeal curve, and bougie removal. ⋯ The aetiology of failed insertion was similar for the digital and introducer tool techniques in 94% (33/35) of patients. There was no blood staining on the bougie, laryngoscope or introducer tool at removal, but blood staining was more common on the ProSeal Laryngeal Mask Airway with the introducer tool technique (9/50 vs 2/50, P=0.03). We conclude that the gum elastic bougie-guided insertion has a higher success rate and causes less trauma than the insertion tool insertion technique after failed digital insertion of the ProSeal Laryngeal Mask Airway.
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Anaesth Intensive Care · Oct 2004
Multicenter StudyMetropolitan audit of appropriate referrals refused admission to intensive care.
We undertook a three-month prospective cohort study of critically ill adult patients referred to the Intensive Care Units (ICUs) of public hospitals in metropolitan Melbourne and Geelong, Victoria. The aim was to ascertain the prevalence and immediate consequences of "refused" admission amongst patients appropriately referred to the ICU of first choice. Between August 1 and October 31, 1999, 10 (out of 12) public hospitals collected data. ⋯ The reasons for "refusal" were limited staffing (52%) and shortage of beds (46%.) Acute inter-hospital transfer (1.7 per day) was the most common immediate triage outcome (57%). These rates are higher than previously reported figures. We conclude that refused admission to the ICU of first choice, and acute inter-hospital transfer in this region and time period, were common events.
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Anaesth Intensive Care · Oct 2004
Comparative Study Clinical TrialAdjustment of anaesthesia depth using bispectral index prolongs seizure duration in electroconvulsive therapy.
Electroconvulsive therapy (ECT) under propofol anaesthesia induces relatively shorter seizures compared to barbiturate anaesthesia. Since significant correlation between seizure duration and bispectral index (BIS) value immediately before electrical stimulus has been reported among patients, adjustment of anaesthesia depth as determined by BIS may be effective in obtaining a longer seizure length. In the present study, we examined this hypothesis in those patients whose muscular seizure duration was less than 40s. ⋯ Seizure duration measured by muscle movement was 31+/-5 s when the stimulus was delivered without waiting and 46+/-10 s when delivered after waiting. There was a significant difference in seizure duration between the two treatments (P<0.01). Waiting for a recovery in BIS value before electrical stimulation can prolong seizure duration.
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Anaesth Intensive Care · Oct 2004
Comparative StudyDelayed epidural catheter removal: the impact of postoperative coagulopathy.
A retrospective analysis of 413 patients who received postoperative epidural analgesia under a standardized protocol found that 84 (20%) had a duration of epidural catheterization of greater than four days. The most common reasons were significant pain (n=64, 15%) and coagulopathy (n=26, 6%). Risk factor analysis for coagulopathy showed an odds ratio of 10.1 (95% confidence interval 4.2-24.5) for prolonged epidural catheterization among patients undergoing hepatectomy. ⋯ The signs soon resolved in all except two, one of whom had neuropathy related to intraoperative positioning and the other preoperative weakness. Accidental epidural catheter dislodgement occurred in 29 patients (7%) and is potentially hazardous if coagulopathy is unresolved. The risk-benefit ratio and factors complicating catheter removal, especially coagulopathy, should be considered when deciding whether to use epidural techniques.