Go to http://www.sonosite.com for more videos and information about ultrasound technology. This video details how bedside ultrasound imaging can be used to guide thoracentesis, detect pleural fluid levels, and analyze patient anatomy. It also discusses patient positioning during the thoracentesis and probe placement. This video is of particular interest to critical care, emergency medicine, internal medicine, and primary care clinicians. To receive notifications about the YouTube videos from SonoSite, click the Subscribe button to subscribe to this channel. For a more comprehensive and portable video library, please download the SonoAccess™ iPhone® app at http://www.sonoaccess.com. Become a fan! Keep up with SonoSite on Twitter (http://twitter.com/sonosite) and Facebook (http://bit.ly/5KiQMX).