There's a new PSA test that has been developed for post-prostate surgery patients. The standard and high-sensitivity tests now available measure PSA in nanograms (billionths of a gram). The new PSA test (see blurb below) measures PSA in picograms (trillionth of a gram). My question is do we need a test that is super sensitive? The anxiety index for post-prostatectomy patients is high enough already without adding to it with a test that is this sensitive. Does it make any difference if a PSA result is 1 trillionth of a gram vs. 2 trillionths of a gram?
MedWire (9/30, Guy) reported that scientists at the Boston-based Quanterix Corporation "have developed a novel method to detect serum prostate-specific antigen (PSA) levels in men who have undergone surgery for prostate cancer." In fact, "in preliminary validation studies, the AccuPSA test -- which uses Single Molecule Array technology to separate individual PSA molecules and count them -- showed a lower detection limit of 0.01 pg/ml, and a quantification limit of less than 0.05 pg/ml. The assay also demonstrated good agreement with a standard PSA test when used to detect higher PSA levels
Post Edited (TimG) : 10/1/2010 9:38:33 PM (GMT-6)