All Patient Hazards AEBCDF Fault Tree Analysis for an ALS Neck Brace Margaret Bennewitz, Laura Hansen, David McGurl, Kristin Wescoe

Support Rods Fail Chin Track Fails Suffocation Mechanical Part Failure Incorrect Size A Improper Placement or Use Device Put On Too Tight

Skin Irritation Allergic Reaction User Factors Excessive Rubbing Clammy or Sweatiness B Device Not Tightened Sufficiently Overuse Without Replacement Improper Padding Thickness

Overheating Environmental Factors Exercise or Strenuous Work Hot Weather C

Neck, Chest, and Shoulder Pain Improper Placement or Use Incorrect Size Insufficient Padding D Padding Factors Hardening of the Pads

Difficulty Eating, Swallowing, and Talking Incorrect Size Chin Pad Too Stiff Jaw Movement Restrained E Brace On Too Tight

Cuts or Scrapes Broken Support Rods Broken Chin Cup or Track Rough Surface Exposed Improper Placement or Use Mechanical Failure User Error F