Jon does this for a living. Dennis discusses some more practical aspects  of analgesia and sedation, such as how to assess for pain when your  patient is unconscious. Jon also discusses the practicality  using IV  lidocaine in an austere environment. This is another podcast from the study discussed on IV lidocaine.  

http://www.oxfordjournals.org/podcasts/bjaed_intravenous_lidocaine_vol_16_issue_9.mp3