TRH STIMULATION TEST IS USED IN THE DIAGNOSIS OF CENTRAL HYPOTHYROIDISM IN PATIENTS WITH SHEEHANS SYNDROME. THIS TEST IS USED FOR SUSPECTED HYPOTHALAMIC-PITUITARY DYSFUNCTION. IT HELPS TO DIFFERENTIATE BETWEEN SECONDARY HYPOTHYROIDISM (PITUITARY PROBLEM) AND TERTIARY HYPOTHYROIDISM (HYPOTHALAMUS PROBLEM) WHEN TSH & T4 LEVELS ARE NOT ENOUGH TO DRAW A FIRM CONCLUSION.
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2 ML (1 ML MIN.) SERUM FROM 1 SST FOR EACH TIMED SPECIMEN. DRAW FASTING BASELINE SPECIMEN; ADMINISTER TRH AS IV BOLUS 7 UG/KG BODY WEIGHT (MAXIMUM 500 UG) OVER 30 SEC. DRAW ADDITIONAL SPECIMENS AT 30 & 60 MIN. SHIP REFRIGERATED OR FROZEN. ALL CONTAINERS MUST BE CLEARLY MARKED WITH TIME DRAWN. SUBMIT ALL SPECIMENS WITH ONE TEST REQUEST FORM.
ECLIA
4HRS
OVERNIGHT FASTING MANDATORY. INJECTION TRH IS NOT SUPPLIED BY TRUEMEDIX