Is PSA Figured As a Percent to Total Blood Volume?

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Question from Tom:
Three days after I made a blood donation at a local blood donating facility, I went to have blood drawn for PSA testing. The test came back much higher than normal. Did the blood donation have an impact on the higher PSA results? Is PSA figured as a percentage to total blood volume? 

Please remember the opinions expressed on Patient Power are not necessarily the views of our sponsors, contributors, partners or Patient Power. Our discussions are not a substitute for seeking medical advice or care from your own doctor. That’s how you’ll get care that’s most appropriate for you. 

Have a question for the experts? Send them to questions@patientpower.info.