Articles: nerve-block.
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Anesthesia and analgesia · Jan 1997
Randomized Controlled Trial Clinical TrialDifferential sensory block after spinal bupivacaine in volunteers.
We performed this study to determine whether differential sensory block to touch, pinprick, and cold after spinal bupivacaine could be used to predict the dermatomal level of block to transcutaneous electrical stimulation (TES) equivalent to surgical stimulation, onset of tourniquet pain, or magnitude of hemodynamic depression. Eight subjects per group were randomized to receive 3.75, 7.5, or 11.25 mg of 0.75% bupivacaine with 8.25% dextrose in a double-blind fashion. Sensory block was assessed with touch, pinprick, cold, TES at T-12, L-2, S-1, and thigh tourniquet pain. ⋯ However, the extent of differential sensory block to touch, pinprick, and cold varied up to 10 dermatomes (2 SD) cephalad to block to TES and up to 7 dermatomes (2 SD) cephalad to the thigh tourniquet at the time of intolerable tourniquet pain. Sensory block to cold did not correlate with hemodynamic depression. Differential sensory block occurs after bupivacaine spinal anesthesia, but is a poor predictor for surgical anesthesia, tourniquet pain, and hemodynamic depression.
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Ann Fr Anesth Reanim · Jan 1997
Randomized Controlled Trial Comparative Study Clinical Trial[Effects of CO2 and adrenaline on 1% lidocaine in axillary block].
To compare lidocaine hydrocarbonate and lidocaine hydrochloride, with and without adrenaline, in the axillary block obtained with a neurostimulator. ⋯ Considering the cost/benefit ratio and the absence of clinical benefits of lidocaine hydrocarbonate, lidocaine hydrochloride should be preferred.
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Ann Fr Anesth Reanim · Jan 1997
Randomized Controlled Trial Comparative Study Clinical Trial[Prevention of arterial hypotension during spinal anesthesia using intramuscular ephedrine in older people].
To assess the efficacy of intramuscular ephedrine for prevention of hypotension following subarachnoid block (SB) in the elderly. ⋯ Prophylactic intramuscular ephedrine is effective to prevent hypotension associated with SB in the elderly.
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Regional anesthesia · Jan 1997
Comparative StudyFailure of meperidine to anesthetize human median nerve. A blinded comparison with lidocaine and saline.
Although meperidine safely produces clinical spinal anesthesia, the responsible mechanism is unknown. This study was undertaken to test the possibility that this drug acts as a local anesthetic by investigating its ability to inhibit conduction in a human peripheral nerve. ⋯ Meperidine produced no signs of local anesthesia, even when given at a dose (75 mg) and concentration (1.5%) that consistently produced systemic side effects. Thus, the coequivalent ability of meperidine and lidocaine to produce spinal anesthesia contrasts with their discordant ability to produce local anesthesia. This disparity suggests that meperidine may produce spinal anesthesia through mechanisms other than inhibition of sodium channel function.
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Ann Fr Anesth Reanim · Jan 1997
Randomized Controlled Trial Clinical Trial[Brachial plexus block: effect of the addition of sufentanil to local anesthetic mixture on postoperative analgesia duration].
To compare the quality and the duration of analgesia produced by a supraclavicular brachial plexus blockade obtained with a mixture of lidocaine and bupivacaine when supplemented or not with sufentanil. ⋯ Sufentanil added to a mixture of lidocaine and bupivacaine increases twofold the duration of postoperative analgesia following branchial plexus blockade.