Articles: nerve-block.
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Anesthesia and analgesia · Mar 1992
Comparative StudyHemidiaphragmatic paresis during interscalene brachial plexus block: effects on pulmonary function and chest wall mechanics.
We studied the effects of unilateral hemidiaphragmatic paresis caused by interscalene brachial plexus block on routine pulmonary function in eight patients. In an additional four patients, we studied changes in chest wall motion during interscalene block anesthesia by chest wall magnetometry. Ipsilateral hemidiaphragmatic paresis, as diagnosed by ultrasonography, developed in all patients within 5 min of interscalene injection of 45 mL of 1.5% mepivacaine with added epinephrine and bicarbonate. ⋯ Peak expiratory and maximum midexpiratory flow rates were also significantly reduced. Interscalene block caused changes in pulmonary function and chest wall mechanical motion that were similar to those published in previous studies on patients with hemidiaphragmatic paresis of pathological or surgical etiology. Interscalene block probably should not be performed in patients who are dependent on intact diaphragmatic function and in those patients unable to tolerate a 25% reduction in pulmonary function.
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A new technique for regional anaesthesia for arthroscopy of the knee is presented. The method includes sciatic nerve block according to the technique proposed by Labat, through a posterior approach and the block of the femoral and lateral cutaneous nerves using a single anterior approach. Results obtained in 30 patients are presented: they include good stability of the cardiovascular and respiratory parameters, high efficiency and duration of anaesthesia resulting in a satisfactory surgical procedure.
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Rev Esp Anestesiol Reanim · Mar 1992
[Utility of the brachial plexus block combined with continuous intradural anesthesia for axillo-femoral bypass surgery].
Extra-anatomic axillofemoral bypass is a surgical procedure that is indicated in cases of occlusive aortoiliac pathology in which the transabdominal way is not feasible or in patients of high risk. We present a preliminary study in which we have prospectively evaluated 14 patients who were received an axillofemoral bypass during 1990. After preoperative evaluation two groups were identified: Group ALR (5 patients) with combined anesthetic blockade of supraclavicular brachial plexus and continuous subarachnoid blockade. ⋯ One patient subjected to general anesthesia died. Combined blockade induces a satisfactory analgesia in all surgical interventions without exceeding in any case the maximal doses of anesthetic drugs. Additionally, this technique affords the advantages of regional anesthesia and can be used as an alternative anesthetic procedure in patients of high risk who undergo axillofemoral bypass.
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Randomized Controlled Trial Comparative Study Clinical Trial
A comparison of two approaches to sciatic nerve block.
This study compared the posterior and popliteal fossa approaches for sciatic nerve block. Patients scheduled to undergo foot surgery were allocated randomly into one of two groups: group A (n = 20) received sciatic nerve block via the posterior approach and group B (n = 20) received a block using the popliteal fossa approach. All blocks were performed with the aid of a peripheral nerve stimulator and alkalinised 0.5% bupivacaine with 1 in 200,000 adrenaline was injected in a dose of 2 mg.kg-1. ⋯ There was no significant difference between the groups in respect of time to onset or duration of block. Patients in group B reported less discomfort during performance of the sciatic nerve block but required supplementary nerve blocks more frequently. We recommend the use of the posterior approach for sciatic nerve block.