Journal of clinical anesthesia
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A patient undergoing total knee replacement was fitted with a stimulating femoral catheter for postoperative analgesia. After the catheter was secured to the skin, the minimal stimulatory threshold was verified again and found to be extremely low (0.00-0.01 mA; pulse width, 0.1 ms). However, in spite of this situation, no paresthesia or pain was experienced by the patient. ⋯ On the basis of this single report, we cannot recommend the routine use of a threshold inferior to 0.2 mA for neural electrolocation. However, we do not advocate the requirement of strict numerical thresholds either. Further research is needed to understand the relationship linking stimulatory threshold and distance between needle (or catheter) tip and nerve.
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Randomized Controlled Trial Comparative Study
Effect of preoperative oral erythromycin, erythromycin-ranitidine, and ranitidine-metoclopramide on gastric fluid pH and volume.
To determine whether combining erythromycin with ranitidine is more efficacious than erythromycin or established ranitidine-metoclopramide combination in reducing the volume and acidity of gastric aspirate. ⋯ Erythromycin and ranitidine combination is more efficacious than erythromycin alone in reducing the acidity and volume of gastric fluid. No difference was found between erythromycin-ranitidine and ranitidine-metoclopramide combination.
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Randomized Controlled Trial Comparative Study
Epidural analgesia after scoliosis surgery: electrophysiologic and clinical assessment of the effects of bupivacaine 0.125% plus morphine versus ropivacaine 0.2% plus morphine.
To study the electrophysiologic and clinical effects of epidural morphine combined with either bupivacaine 0.125% or ropivacaine 0.2%. ⋯ After epidural administration during the study conditions, bupivacaine 0.125% and ropivacaine 0.2% combined with morphine allow for neurologic examination.
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Randomized Controlled Trial
Blocking noise but not music lowers bispectral index scores during sedation in noisy operating rooms.
To determine whether playing music or blocking noise can reduce bispectral index (BIS) values during propofol sedation. ⋯ Blocking noise is more effective than playing music in reducing BIS scores during propofol sedation in a noisy environment.
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Randomized Controlled Trial Comparative Study
Comparison of the cardiovascular effects of isoflurane and sevoflurane as measured by magnetic resonance imaging in children with congenital heart disease.
To compare the cardiovascular effects of isoflurane and sevoflurane at minimum alveolar concentration (MAC) = 1 in children with congenital heart disease using cardiac magnetic resonance imaging. ⋯ Both isoflurane and sevoflurane were found to be comparable in terms of cardiovascular effects.