• A container will be created normally, with the addition of: 
    • The Receive Bottle Weight is the weight of the container once is has been received in your hospital
    • The Before Open Bottle Weight is the weight of the container before it has been opened
    • The open weight of the container is not required until the container is opened.
    • The quantity to mass conversion number is automatically populated as "1". This converts 1 gram to 1 ml.
  • For a substance that is more dense than water - you will need to do a conversion ratio calculation
    • First weigh your container (in grams) - This is the pre weight
    • Second, withdraw 10mls of the substance
    • Weigh the container again (in grams) - This is the post weight
    • Place the substance back into the container
    • Calculate the conversion ratio as follows:

      • Step 1:

        (pre weight) - (post weight) = (difference)


      • Step 2: 

        (quantity drawn) / (difference)   = the weight of 1ml (mass to quantity conversion)


        Example: Pre weight =152.60 grams, post weight = 141.60 grams

                                                   Ratio = 10 divided by 11 (11 gram difference between pre and post weight)

                                                   Ratio = 0.9 - This would be the conversion ratio you enter in



* Having the correct conversion rate is important to ensure you do not have inaccurate weights of containers when they are finished and empty. Also, do not forget to account for hub loss once a container is physically empty*



*** Keep in mind that while tracking by weight is good backup measure, it is most important to ensure your quantity of volume used (mLs) is accurate in your log to ensure DEA compliance***

                                       






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