In our latest infographic analysis, today’s post highlights medical device warning letters with quality system deficiencies. Surprisingly, warning letters were actually down 12.2% from 2012. However, they are almost double the number (77) issued in 2009. Are we looking at a downward trend? The jury’s still out. The highest number of warning letters issued in the past 10 years was in 2012, with a total of 164. The lowest was 2007, with only 74 warning letters issued.