Lab Test : T4

Print this page Bookmark and Share
Phone:(937) 641-3428
SQ Code:T4
Available:Mon - Fri, first shift only
Turnaround:24 hours
Volume:0.7 mL
Container:4 mL red top tube
Temperature:Transport to lab within 30 minutes.
Rejection:Samples held at room temperature for more than 8 hours.
1 month: 7.2-15.7g/Dl
1 year: 6.0-14.2 g/dL
10 yYears: 4.7-12.4 g/dL
21 years: 5.3-10.5 g/dL
1 month: 7.2-15.7 g/dL
1 year: 6.0-14.2g/dL
10 years: 4.7-12.4g/dL
21 years:5.7-11.4 g/dL
Uses:T4 levels are useful in monitoring patients with hyperthyroidism; also used to screen for thyroid dysfunction.
Limitations:The anticonvulsant drug phenytoin may interfere with the total and free T4 levels due to competition for TBG binding sites.
Method:Competitive chemiluminescence immunoassay

Sign up for Pediatric Link

Finding the latest trusted child health and safety information doesn't have to be hard. Pediatric Link, Dayton Children's e-newsletter offers timely and up-to-date information for health care professionals from the experts you trust at Dayton Children's.  Sign up

Upcoming Events

Preble County YMCA fun family event

Free family event for parents of children birth to 5 years old

Pre-ordering now available!! Get your special edition shortbread puzzle piece cookies from Panera Bread! Cookies will be sold in stores April 13th to 19th. 100% of proceeds will benefit Dayton Childrens Hospital newly launched autism diagnostic center.

View full event calendarView full event calendar

The Right Experts

Just right for all kids


The Children's Medical Center of Dayton Dayton Children's
The Right Care for the Right Reasons

One Children's Plaza - Dayton, Ohio - 45404-1815