Acta anaesthesiologica Scandinavica
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Acta Anaesthesiol Scand · Aug 1998
Randomized Controlled Trial Comparative Study Clinical TrialWaste gas exposure during desflurane and isoflurane anaesthesia.
Currently, there are no data available concerning the occupational exposure to desflurane during general anaesthesia. This prospective, randomized study reports on occupational exposure to desflurane, compared to isoflurane, in a modern operation theatre (OT). ⋯ Occupational exposure to desflurane is low in the environment of a modern OT, even though it has to be administered in approximately 5-fold higher concentrations compared to isoflurane.
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Acta Anaesthesiol Scand · Aug 1998
Randomized Controlled Trial Comparative Study Clinical TrialModified double burst stimulation of varying stimulating currents.
Using modified double burst stimulation (modified DBS), sufficient level of recovery from neuromuscular blockade (train-of-four (TOF) ratio > 0.7) can properly be diagnosed. Modified DBS may often be applied in awake patients in the postanesthetic care unit. As the stimulating current decreases, the neurostimulation-induced discomfort becomes less for awake subjects. It is relevant to investigate the usefulness of the modified DBS delivered at low currents. ⋯ Modified DBS-induced discomfort becomes less as the stimulating current decreases. However, when stimulated at 30 or 20 mA, fade in response to modified DBS is felt in too many cases, even after neuromuscular blockage subsides to an adequate level.
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Acta Anaesthesiol Scand · Aug 1998
Randomized Controlled Trial Comparative Study Clinical TrialPostoperative analgesia with epidural bupivacaine and low-dose fentanyl--a comparison of two concentrations.
The purpose of the study was to compare the analgesic and side effects of two epidurally administered mixtures of bupivacaine and fentanyl with the same drug ratios. ⋯ Both groups had low pain scores with few and comparable adverse effects. It thus seems that the volume is not important when mixtures of bupivacaine and fentanyl in the studies concentrations are infused epidurally at a low thoracic level. Practical reasons favour the higher concentration mixture.
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Acta Anaesthesiol Scand · Aug 1998
Randomized Controlled Trial Clinical TrialTransient radicular irritation after spinal anesthesia induced with hyperbaric solutions of cerebrospinal fluid-diluted lidocaine 50 mg/ml or mepivacaine 40 mg/ml or bupivacaine 5 mg/ml.
Transient radicular irritation (TRI) is common after spinal anesthesia induced with hyperbaric lidocaine 50 mg/ml. The purpose of this study was to determine the incidence of TRI after spinal anesthesia with hyperbaric lidocaine 50 mg/ml diluted with cerebrospinal fluid (CSF) 1:1 and hyperbaric mepivacaine 40 mg/ml and hyperbaric bupivacaine 5 mg/ml. ⋯ TRI is frequent after spinal anesthesia induced with hyperbaric lidocaine 50 mg/ml diluted with CSF 1:1. The incidence of TRI after hyperbaric mepivacaine 40 mg/ml is of the same magnitude. TRI could not be observed after bupivacaine spinal anesthesia.
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Acta Anaesthesiol Scand · Aug 1998
Randomized Controlled Trial Clinical TrialPreservation of humidity and heat of respiratory gases in spontaneously breathing, tracheostomized patients.
Ventilation with endotracheal intubation bypasses the upper airway and the normal heat and moisture exchanging process of inspired gases. A continuous loss of moisture and heat occurs and predisposes patients to serious airway damage. We therefore prospectively studied one heated humidifier system, one cold humidifier system and one heat and moisture exchanger in spontaneously breathing, tracheostomized intensive care unit patients to determine the ability to preserve patients' heat and water. ⋯ In spontaneously breathing, tracheostomized intensive care unit patients, the Trach-Vent heat and moisture exchanger and the Aerodyne heated system achieved satisfactorily preservation of heat and humidity of inspired gases.