{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,15]],"date-time":"2025-11-15T10:17:22Z","timestamp":1763201842664},"reference-count":18,"publisher":"Wiley","issue":"6","license":[{"start":{"date-parts":[[2014,6,1]],"date-time":"2014-06-01T00:00:00Z","timestamp":1401580800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Ultrasound Medicine"],"published-print":{"date-parts":[[2014,6]]},"abstract":"<jats:sec><jats:title>Objectives<\/jats:title><jats:p>Ultrasound guidance may decrease the procedural time for many peripheral nerve blocks compared to nerve stimulation, but these studies have generally excluded obese patients. This single\u2010blinded randomized clinical trial was designed to compare procedural times and related outcomes for ultrasound\u2010 versus nerve stimulation\u2010guided lateral popliteal\u2010sciatic nerve blockade specifically in obese patients.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>With Institutional Review Board approval and informed consent, patients with a body mass index greater than 30 kg\/m<jats:sup>2<\/jats:sup> who were scheduled for foot\/ankle surgery and desiring a peripheral nerve block were offered enrollment. Study patients were randomly assigned to receive a lateral popliteal\u2010sciatic nerve block under either ultrasound or nerve stimulation guidance. The patient and assessor were blinded to group assignment. The primary outcome was procedural time in seconds. Secondary outcomes included number of needle redirections, procedure\u2010related pain, patient satisfaction with the block, success rate, sensory and motor onset times, block duration, and complication rates.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Twenty\u2010four patients were enrolled and completed the study. All patients had successful nerve blocks. The mean procedural times (SD) were 577 (57) seconds under nerve stimulation and 206 (40) seconds with ultrasound guidance (<jats:italic>P<\/jats:italic>&lt; .001; 95% confidence interval for difference, 329\u2013412 seconds). Patients in the ultrasound group had fewer needle redirections and less procedure\u2010related pain, required less opioids, and were more satisfied with their block procedures. There were no statistically significant differences in other outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The results of this study show that, for obese patients undergoing lateral popliteal\u2010sciatic nerve blocks, ultrasound guidance reduces the procedural time and procedure\u2010related pain and increases patient satisfaction compared to nerve stimulation while providing similar block characteristics.<\/jats:p><\/jats:sec>","DOI":"10.7863\/ultra.33.6.1057","type":"journal-article","created":{"date-parts":[[2014,5,27]],"date-time":"2014-05-27T22:09:44Z","timestamp":1401228584000},"page":"1057-1063","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["A Randomized Clinical Trial Comparing the Effectiveness of Ultrasound Guidance Versus Nerve Stimulation for Lateral Popliteal\u2010Sciatic Nerve Blocks in Obese Patients"],"prefix":"10.1002","volume":"33","author":[{"given":"Nicholas C. 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