Articles: nerve-block.
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Comparative Study
Changes in median nerve somatosensory transmission and motor output following transient deafferentation of the radial nerve in humans.
To determine if transient anaesthetic deafferentation of the radial nerve would lead to alterations in processing of early somatosensory evoked potentials (SEPs) from the median nerve or alter cortico-motor output to the median nerve innervated abductor pollicis brevis (APB) muscle. ⋯ Transient deafferentation of the radial nerve, which supplies wrist and hand extensor muscles, has been shown to alter sensory processing from and motor output to the median nerve innervated thenar muscles.
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Reg Anesth Pain Med · Jul 2003
Comparative StudyLevobupivacaine versus ropivacaine for sciatic nerve block in the rat.
Ropivacaine and levobupivacaine, both single S- enantiomers, are being promoted as safer alternatives to racemic bupivacaine. To determine whether levobupivacaine produces a more potent and longer lasting peripheral nerve block than ropivacaine, we compared functional blockade of sciatic nerve in the rat at several doses with these 2 agents. ⋯ At the lowest concentration (0.0625%), levobupivacaine produces a greater degree of motor impairment and a longer duration of proprioceptive impairment relative to ropivacaine. At the middle concentration (0.125%), there no differences between the 2 drugs. At the higher concentration (0.25%), which is within the range used clinically for peripheral nerve block (0.25%-0.5%), levobupivacaine produces approximately a 30% longer duration of complete block in each modality compared with that by ropivacaine.
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The vertical infraclavicular blockade of the brachial plexus (VIP) according to Kilka et al.is a technique which has gained more importance over the past years. This method distinguishes itself from other periclavicular techniques by a very low risk of pneumothorax (0.2%), which seems to be increased with asthenic patients. ⋯ As a consequence, we assume that if the distance between the leading points jugulum and ventral process of acromion is smaller than 20 cm, the puncture point for a vertical infraclavicular blockade of the brachial plexus should be lateralized as described above; additionally, the "finger-point" should be determined in order to verify the puncture point and to finally give an idea of the direction, in case of a possible need for correcting the puncture point.
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Reg Anesth Pain Med · Jul 2003
Randomized Controlled Trial Comparative Study Clinical TrialComparison of continuous 3-in-1 and fascia Iliaca compartment blocks for postoperative analgesia: feasibility, catheter migration, distribution of sensory block, and analgesic efficacy.
Efficacy and technical aspects of continuous 3-in-1 and fascia iliaca compartment blocks were compared. ⋯ The authors conclude that a catheter for continuous lumbar plexus block can be placed more quickly and at lesser cost using the fascia iliaca technique than the perivascular technique with equivalent postoperative analgesic efficacy.