![]() ![]() Circadian variation in thyroid-stimulating hormone (TSH) levels has been well described, with secretion partially pulsatile and partially basal. The timing of phlebotomy is not usually considered when ordering thyroid function tests. insulin tolerance test or glucagon stress test). 2,3 Given that 5- to 20-minute sampling for 24 hours is not practical, we usually rely on dynamic testing to investigate GH excess (oral glucose tolerance test) or deficiency (e.g. age, sex, weight, sleep, food, stress and exercise) influence the complex regulatory mechanism of the GH axis. ![]() Numerous other endogenous and exogenous factors (e.g. Between pulses, the serum GH concentration may be undetectable. Frequent blood-sampling techniques have demonstrated the pulsatile nature of GH secretion, with approximately eight peaks per 24-hour period, predominately at night. Generally, ordering a random growth hormone (GH) level is unhelpful the results will be difficult to interpret. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |