Delayed Presentation of Horner's and Harlequin-Like Symptoms Following Interscalene Peripheral Nerve Catheter Placement.

Interscalene peripheral nerve catheters are a commonly performed procedure often used to provide continuous outpatient analgesia following orthopedic procedures. In this case report, we present an interesting case of a patient who received an interscalene catheter following an orthopedic procedure and demonstrated an atypical presentation of combined partial Horner's and Harlequin-like syndromes evolving more than 36 hours after block placement. Although several case reports in the literature exist describing incidents in which interscalene catheter migration has led to the late onset of complications, it has never before been observed with either this degree of delay or this combination of symptoms.

EEG dynamical correlates of focal and diffuse causes of coma.

Background: Rapidly determining the causes of a depressed level of consciousness (DLOC) including coma is a common clinical challenge. Quantitative analysis of the electroencephalogram (EEG) has the potential to improve DLOC assessment by providing readily deployable, temporally detailed characterization of brain activity in such patients. While used commonly for seizure detection, EEG-based assessment of DLOC etiology is less well-established.