Plasma More information

Inpatients receiving therapy with high biotin doses (>5 mg/day) no specimen should be taken until at least 8 hours after the last biotin administration.

A morning fasting specimen preferred.

Preferred Minimum: 1 mL plasma in Pink top tube
Absolute Minimum: 0.5 mL plasma in Pink top tube

Hemolyzed specimens.

Deliver to laboratory immediately after collection.

Sunday - Saturday

24 hours (upon receipt in laboratory)

Effective May 16, 2022

Age                    Female             Male 
6 months-6 years       500-1800 pg/mL     500-1700 pg/mL 
7-9 years              566-1690 pg/mL     522-1682 pg/mL 
10-12 years            503-2077 pg/mL     553-2071 pg/mL 
13-15 years            160-1590 pg/mL     485-2468 pg/mL 
16-17 years            167-933 pg/mL      276-1546 pg/mL 
18-29 years                               238-1019 pg/mL 
30-39 years                               225-936 pg/mL 
40-49 years                               182-801 pg/mL 
50-59 years                               161-737 pg/mL 
60-69 years                               132-752 pg/mL 
70 years or greater                       118-776 pg/mL
Premenopausal          136-689 pg/mL
Postmenopausal         177-1015 pg/mL	

CTx is useful to assess bone resorption in patients with metabolic bone disease. The test is also useful in monitoring therapy to slow or halt osteoporotic bone loss.

Quantitative Electrochemiluminescent Immunoassay

82523

See Additional Information:
Fasting Specimen Requirements