Lab Tests Beginning With T

19 tests in the Lab Values reference begin with the letter T. Every name links to a page with its typical adult range in both unit systems, plain-language notes on high and low results, and preparation notes where they apply.

A B C D E F G H I L M N NUMBERS O P R S T U V W Z

Test	Abbr.	Typical range (conventional)	Typical range (SI)
Testosterone, Total	—	Male 300–1,000; Female 15–70 ng/dL	Male 10.4–34.7; Female 0.5–2.4 nmol/L
Thiamine (Vitamin B1)	—	70–180 nmol/L	70–180 nmol/L
Thrombin Time	TT	14–21 sec	14–21 sec
Thyroglobulin	Tg	1.5–38.5 ng/mL	1.5–38.5 ng/mL
Thyroglobulin Antibodies	Anti-Tg	<20 IU/mL	<20 IU/mL
Thyroid Peroxidase Antibodies	Anti-TPO	<35 IU/mL	<35 IU/mL
Thyroid-Stimulating Hormone	TSH	0.4–4.5 mIU/L	0.4–4.5 mIU/L
Thyroid-Stimulating Immunoglobulin	TSI	<140 % of baseline	<140 % of baseline
Total Cholesterol	—	Desirable <200 mg/dL	Desirable <5.17 mmol/L
Total Complement Activity	CH50	41–95 U/mL	41–95 U/mL
Total Iron-Binding Capacity	TIBC	250–450 µg/dL	45–81 µmol/L
Total Protein	TP	6.0–8.3 g/dL	60–83 g/L
Total Thyroxine	Total T4	5.0–12.0 µg/dL	64–154 nmol/L
Total Triiodothyronine	Total T3	80–200 ng/dL	1.2–3.1 nmol/L
Transferrin	—	200–360 mg/dL	2.0–3.6 g/L
Transferrin Saturation	TSAT	20–50 %	20–50 %
Triglycerides	TG	Desirable <150 mg/dL	Desirable <1.69 mmol/L
Troponin I	cTnI	≤0.04 ng/mL	≤40 ng/L
Troponin T	cTnT	≤0.01 ng/mL	≤10 ng/L

Please note: Reference ranges vary between laboratories, and between the methods and instruments they use — the range printed on your own report is the one your result should be compared with. A result outside the range is not by itself a diagnosis, and a result inside it does not rule out illness. These pages are an educational summary, not medical advice: always discuss your results with the clinician who ordered them, who can interpret them in the context of your health and history.

Lab Tests Beginning With T

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