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bioavailable testosterone
Decreases:
males
1) hypogonadism
2) orchidectomy
3) estrogen therapy
4) Klinefelter's syndrome
5) hypopituitarism
6) testicular feminization
7) hepatic cirrhosis
8) andropause*
9) levels drop in men with children
* 40% of men > 45 years of age
Increases:
females:
- polycystic ovary syndrome (female)
Specimen:
-> serum (red top); separate serum; store frozen
Method:
- bioavailable testosterone measures free plus albumin-bound testosterone
Procedure:
- ammonium sulfate is used to precipitate albumin
Related
free testosterone
testosterone (Delatestryl Testopel, Striant, Intrinsa, Xyosted)
testosterone in serum
General
special chemistry test
References
- ABC's of Interptretive Laboratory Data, 4th ed, Bakerman S et al
(eds), Interpretive Laboratory Data Inc, Scottsdale, AZ, 2003
http://www.bakermanbooks.com
- Panel of 5 tests
Laboratory Test Directory ARUP: 70102