• Karl Otto Geier.
• Hospital Municipal de Pronto-socorro de Porto Alegre, Porto Alegre, RS.
• Rev Bras Anestesiol. 2006 Aug 1;56(4):413-8.

Background And ObjectivesThe clinical results of regional peripheral blockades are not always what we hope for. Sometimes the results are short of our intent and sometimes are exaggerated. To understand and learn those phenomena, radioimaging techniques are very helpful. The objective of this study is to demonstrate the different trajectories and distribution of catheters and anesthetics (local anesthetic with contrast), respectively, used in regional blockades of the upper and lower limbs.Case ReportsThree cases of peripheral regional blockade, in which unexpected clinical effects were solved using contrast X-rays, are presented.ConclusionsContrast X-rays are very useful to verify the position of catheters and solve unexpected anesthetic effects, because they are able to relate the unpredictable dispersion of anesthetics to the signs and symptoms of peripheral blockades.

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