Bilirubinometers and Lab bilirubin correlation

We came across this several years ago. Even though its not POCT we worked with the nursing team to do a correlation study between the two system across the full range of values. (I think we did about 75 chart reviews) We then went over the data identifying the weak points of the system (an example we established was that darker skin tones had less concordance) and summarized an interpretation of any obvious limitations we found. The Nurses got to make a presentation to the providers and POC got to stretch our legs a bit. We look for every chance we can to collaborate with other departments.

Karen,
  Timely message.  I have just been told that the neonatal intensive care doctors are questioning the accuracy of a new transcutaneous bilirubin system  they recently started using.  I don't have the details yet but no correlation was done by POCT as it didn't fall under my wheelhouse.  That said, it appears that I will need to do some follow-up.  
Tom,
  I take it you looked back at charts for comparisons.  Did you do any draws to coincide with the meter use ?

We had the nurses perform transq's at the time of all bili collections and log it down with time/ date and race of the patient. after I think 3 weeks weeks we collected the logs, added our lab values and went over the data with our neonatal NP and the patient charts to identify any red flags or exceptions. (none found) Then we correlated the data and handed it over to the nurses who presented to the providers. Nothing ground breaking come of it but it was a great exercise in teamwork and got everyone on the same page as far as expectations from transq numbers.

why is my face sideways?

Would anyone know what acceptability criteria you use when comparing transcutaneous bilirubin and serum bilirubin?