Articles: nerve-block.
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This retrospective study concerns 1,373 adult patients who underwent forefoot surgery during 1988-95 under regional anaesthesia by ankle nerve blocks (of posterior tibial nerve systematically and other nerves according to the surgical site). As a rule, plain bupivacaine 0.5% (maximum 40 mL) was used, completed if necessary by lidocaine 1% (a few mL). A nerve stimulator is currently used for posterior tibial blocks. ⋯ No general anaesthesia was needed (except after one case of convulsions, likely from accidental injection of a few mL of local anaesthetic and without any sequelae). Five patients complained of temporary paraesthesias, with indication of a posterior tibial neurolysis in one case and complete recovery. Thus ankle blocks appear increasingly to be a satisfactory alternative to general anaesthesia for most surgical procedures on the forefoot, provided that all usual safety conditions are respected and the patient's acceptance of the procedure is obtained.
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Regional anesthesia · Jan 1996
A trigonometric analysis of needle redirection and needle position during neural block.
Successful regional anesthesia involves a three-dimensional visualization of anatomy and an informed approach to needle placement and repositioning. This study trigonometrically examines the relationship between needle insertion angle and resultant needle position. ⋯ Incremental needle redirection of 5 degrees allows a precise survey of neural and adjacent anatomy and results in approximately one half the change in needle position occurring with a 10 degree angle of redirection. However, a 10 degree angle of redirection may result in walking over the desired neural structure.
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J Comput Assist Tomogr · Jan 1996
Retrocrural splanchnic nerve alcohol neurolysis with a CT-guided anterior transaortic approach.
Retrocrural splanchnic nerve alcohol neurolysis with a CT-guided anterior transortic approach, a new method for splanchnic block alleviation of chronic abdominal pain, is described. Ten patients with chronic abdominal pain requiring narcotic treatment, six with pancreatic carcinoma, one with gastric carcinoma, two with chronic pancreatitis, and one with pain of unknown etiology, were referred for splanchnic nerve neurolysis. With CT guidance, a 20 gauge needle was placed through the aorta into the retrocrural space at T11-T12, and 5-15 ml 96% alcohol was injected into the retrocrural space. ⋯ There were no significant complications. CT-guided anterior transaortic retrocrural splanchnic nerve alcohol neurolysis is technically feasible, easier to perform than the classic posterolateral approach, and may have less risk of complications. The success rate in this initial trial was reasonable and, therefore, this technique provides an additional method for the treatment of abdominal pain.