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Canada-QC-DEGELIS företaget Kataloger
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- Comparison of Three Assays for Total and Free PSA Using . . .
Currently available commercial assays for the measurement of total PSA (tPSA) and free PSA (fPSA) are based on the immunochemical quantification of the circulating free and complexed to α1-antichymotrypsin forms of PSA (6-8) The free-to-total serum PSA ratio, usually given as a percentage (%fPSA), has been proposed to differentiate benign
- Use of the Percentage of Free Prostate-Specific Antigen to . . .
Specimens held for longer times were stored at −70°C until analyzed 18 Concentrations of PSA were determined using the Tandem PSA and free PSA monoclonal antibody assays (Hybritech Inc, San Diego, Calif) 19 The same serum sample was used to determine both total PSA and free PSA concentrations, as would be done in clinical practice Total
- PSA, Free Total
Includes measurement of Total PSA and Free PSA by the Hybritech methods, and calculation of Percent Free PSA as follows: %Free PSA = 100 x (Free Total) Percent Free PSA is indicated primarily with Total PSA results in the 3-10 ng mL range Generally %Free PSA levels of 20% or more suggest a higher probability of BPH whereas levels of 10% or
- 140405: Prostate Health Index (phi) Profile | Labcorp
The Access Hybritech free PSA assay is intended to be used with Hybritech (total) PSA to calculate the ratio of free PSA to total PSA expressed as a percentage (percent free PSA) 2 Percent free PSA as measured by the Hybritech assays is indicated for use as an aid in distinguishing prostate cancer from benign prostatic conditions, when used in
- Hybritech Total and Free Prostate-specific Antigen Assays . . .
Men with prostate cancer tend to have lower percent free PSA (%FPSA) values than men with benign disease (2)(3)(4); %FPSA is the ratio of free PSA to total PSA times 100% Beckman Coulter, Inc (Fullerton, CA) has developed the Access Hybritech PSA and Hybritech PSA assays for use on the automated Access Immunoassay System
- ACCESS Access Hybritech PSA Instructions For Use Prostate . . .
Equimolar-response assays detect the free and complexed forms of PSA equally; non-equimolar or skewed-response assays have been shown to produce two to three times more signal per free PSA molecule than with PSA-ACT The Access Hybritech PSA assay is an equimolar assay in which sample recovery is unaffected by the ratio of PSA forms in serum
- Comparison of three assays for total serum prostate-specific . . .
The overlap between the total PSA values for those patients diagnosed with BPH versus those diagnosed with prostate cancer is shown for the Hybritech method in Fig 1 Using free PSA values by the Hybritech method as the numerator, free total PSA ratios were cal- culated for the Hybritech (F T,), the Abbott IMx (F T,), and the Tosoh AIA-600 (F
- Value of free prostate-specific antigen (Hybritech Tandem-R . . .
Percent f-PSA seems to decrease the biopsy rate at PSA levels from 4 to 10 ng ml without missing a relevant number of cancers and to increase the detection rate at PSA <4 ng ml Our data indicate that it might be necessary to choose high cutoff points (25%; Tandem-E and R assay, Hybritech) in a s …
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