For the article by Riley et al.  in the September 2002 issue of Anesthesiology (2002;97:574–7), the authors acknowledge that the manufacturer of the Sprotte needle was incorrectly identified as Pencan, B. Braun (Melsungen, Germany). The needle used in the study was from Pajunk GmbH (Geisengen, Germany). The authors do not believe that this error alters their conclusions or the validity of their findings.