Summary for Glucose Testing  Section

Key issues for Inpatient glucose monitoring:

bulletfalse low finger tip glucose levels have been reported in vasoconstricted patients
bulletfalse low finger tip glucose levels have been reported in hypotensive volume depleted patients

Timing of glucose monitoring:

bulletCovered in management section, but bottom line is that it should be timed to match eating or insulin pharmacodynamics. 

HgA1c

The chart below is the most current for correlation of glucose to this value.
Thus a HgA1c of 7 correlates to average glucoses from before and after eating for the past 3 months of 170 mg/dl.