Question

The following analytes needs timed samples due to their diurnal levels in the body, EXCEPT: A. uric acid C. iron

B. cortisol D. ACTH

briefly explain why it is the answer and why the other are not

A phlebotomist was given 3 laboratory requests for morning pick-up as follows:

Px Request 1 - Complete Blood Count

Px Request 2 - Fasting Blood Sugar

Px Request 3 - Potassium

Based on the information given above, which of the following laboratory requests should be given priority of the phlebotomist even not requested as STAT?
A.) Patient request 1 C.) Patient request 3
B.) Patient request 2 D.) Patient request 1 and 2

briefly explain why it is the answer and why the other are not

Answer 1

Qn.No 1.

The following analytes needs timed samples due to their diurnal levels in the body, EXCEPT:

A. uric acid C. iron

B. cortisol D. ACTH

briefly explain why it is the answer and why the other are not

Answer is A uric acid . Uric acid test does not need timed samples.It is an end product of protein metabolism. But the client abstainfrom some medictions , which alter protien metabolism.

All other needs timed samples.

B. Cortisol. It has diurnal variation during day and night. Serum level is high at 4 am . then reduce angain it raise at peak level in the evening 4pm. Hence, the patient need to take blood twice( 4 am & 4pm)

C.Iron. The bioavilability of iron is high during early morning . The client need 12 hours starvation , then the sample blood can be collected in the early morning.

D. ACTH. the variation in the secretion of ACTH occur.The serum level is high in the morning before 10 am. Better to collect sample for ACTH test is at 8am.

Qn.No.2. Based on the information given above, which of the following laboratory requests should be given priority of the phlebotomist even not requested as STAT?

Ans: Patient request 2. fasting blood sugar.

The aim of fasting blood sugar testing to fing out amount of glcose present in the blood after considerable period of starvation. Blood should be withdrawn in the early morning, before taking oral food. Because , if the client consumes oral food, glucose will absorbe in to the blood. Then it is called random blood sugar or post prandial blood sugar. So, the phlebotomist should give priority for Fasting blood sugar test.

Complete blood count- CBC can be checked at any time Food intake or client activity will not alter results.

Potassium level will not be alter by food intake or by time , unless the patient have renal disease or metabolic disorders.