8-6 Consulting Reference Information
P/N 85213-30, Manual revision: B
Calculating
platelet
collection
efficiency
The platelet collection efficiency can be calculated by dividing the platelet yield
by the total number of platelets processed. The preferred method of calculating
the platelet collection efficiency is based on the average of pre-collection and
post-collection platelet counts.
The mean platelet collection efficiency of the MCS+ device can be entered by an
authorized Haemonetics representative, once a sufficient number of platelet
collection procedures have been completed.
To calculate the platelet collection efficiency:
" Determine the average platelet count of the donor.
Note: If both a platelet pre-count and a post-count are available, the average of
the pre- and post-counts can be used. When a post-collection platelet count is
not available, and only a pre-collection platelet count is available, this value can
be used.
" Determine the net volume of donor blood processed by subtracting the
volume of AC used from the total volume processed during the procedure.
" Calculate the number of platelets which have passed through the bowl
during the procedure:
Example: If the donor platelet count was 250 10e3/µl and the total donor blood
processed was 3500 ml, the total number of platelets processed was
250 x 3500/100,000 equaling 8.75 10e11 platelets processed through the bowl.
" Calculate the platelet collection efficiency as follows:
Donor Blood Processed = Total Volume Processed – AC Volume Processed
Platelets Processed =
Platelet Count x Donor Blood Processed
100,000
Platelets
Platelet Efficiency =
Platelet Yield
Platelets Processed
x 100%
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