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MedSurg-Endocrine

Common laboratory tests

QuestionAnswer
Thyroid tests TSH/Best screening test for thyroid function, also used to monitor thyroid hormone replacement therapy. T3 & T4
Parathyroid tests PTH/Fasting, Calcium level drawn at same time. Helps determine cause(parathyroid or nonparathyroid) of hypercalcemia. Calcium and Phosphorus tests.
Pituitary Tests GH, ADH, ACTH, Urine Specific Gravity (Measures concentration of particles in urine & determines how good of a filter your kidney is & how hydrated you are. low specific gravity indicates dilute urine. High specific gravity indicates concentrated urine.)
Adrenal tests Cortisol (higher in the morning), 24-hour urine for VMA(vanillylmandelic acid) A major metabolite of epinepherine and norepinephrine.
Pancreatic Function tests(Diabetes) Fasting Plasma Glucose (FBS Fasting Blood Sugar), Postprandial Blood Sugar(PPBS), Oral Glucose Tolerance Test, Glycosylated Hemoglobin(HbA1C, Glycohemoglobin)
Fasting Plasma Glucose levels Normal 65-99 mg/dL. Critical <50 or >400 mg/dL. Elevated fasting blood glucose level above 126 mg/dL on at least two occasions typically indicates diabetes.
Postprandial Blood Sugar (PPBS)levels less than 105 mg/dL. Drawn 2 hours after eating.
Oral Glucose Tolerance Test Blood glucose levels are assessed twice. The first is a fasting sample, the second sample is taken 2 hours after ingestion of 75 g of glucose.
Glycosylated Hemoglobin(HbA1C, Glycohemoglobin) ADA recommended treatment goal for hemoglobin A1c is less than 7%. Non-diabetic <5%. Diabetes well-controlled 2.5%-6%. Diabetes not well-controlled >8%.
What's the Purpose of the Glycosylated Hemoglobin(HbA1C)test Used for monitoring average diabetic control for preceding 3 months. Blood cells typically live for 2-3 months. Prolonged blood glucose elevation causes a greater % of RBCs to become saturated w/glucose.
Created by: krislynn