Urology Book

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Free Testosterone

Aka: Free Testosterone, Bioavailable Testosterone, Serum Free Testosterone
  1. See Also
    1. Total Testosterone
    2. Androgen Decline in the Aging Male
    3. Testicular Failure
    4. Hypogonadism
  2. Indications
    1. Total Testosterone decreased
    2. Altered sex-hormone binding globulin (SHBG)
      1. Low SHBG
        1. Obesity
        2. Type II Diabetes
        3. Hypothyroidism
      2. High SHBG
        1. Older age patient
  3. Labs: Normal Levels
    1. Male: 100 to 680 pg/ml
    2. Female: 3 to 22 pg/ml
  4. Labs: Calculation of Testosterone Free Index (TFI)
    1. TFI = (Total Testosterone / SHBG) x100
  5. Interpretation
    1. See Androgen Decline in the Aging Male
    2. See Testicular Failure

Free testosterone (C0443483)

Concepts Hormone (T125) , Steroid (T110)
SnomedCT 259355006
LNC LP18811-7, MTHU005045
English free testosterone, testosterone free, Free testosterone, Testosterone.free, Free testosterone (substance)
Spanish testosterona libre (sustancia), testosterona libre
Sources
Derived from the NIH UMLS (Unified Medical Language System)


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