Biochemical Tests and Sample Collection in Clinical Biochemistry

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What is the method for obtaining venous blood?

Venipuncture (correct)

Skin puncture

Arterial puncture

Capillary blood drawing

Which specimen is usually the choice for blood analysis?

Venous blood (correct)

Arterial blood

Capillary blood

Skin puncture blood

What is the main purpose of using arterial puncture in blood collection?

Obtaining capillary blood

Blood gas analysis (correct)

Obtaining venous blood

Obtaining plasma

How is plasma obtained from whole blood?

By using an anticoagulant Signup and view all the answers

What is the nature of capillary blood?

Oxygenated blood Signup and view all the answers

Why is it important to accurately label specimens in sample collection?

To ensure correct test results Signup and view all the answers

Which component makes up about half of the blood volume?

Plasma Signup and view all the answers

What is the clear liquid that can be separated from clotted blood called?

Serum Signup and view all the answers

What factor may lead to hypokalemia for a few hours before venipuncture?

Medication Signup and view all the answers

Applying a tourniquet proximal to the venipuncture site is usual to make it easier to enter the vein with the needle. This is known as:

Venous stasis Signup and view all the answers

What should laboratories only accept blood in?

Only in the correct containers Signup and view all the answers

Which term is defined as the disruption of the RBCs membrane and results in the release of the hemoglobin?

Hemolysis Signup and view all the answers

Which component of blood may interfere with some chemical assays if released into the plasma due to hemolysis?

Potassium Signup and view all the answers

What is the usual purpose of applying a tourniquet proximal to the venipuncture site?

To make it easier to enter the vein with the needle Signup and view all the answers

What may affect test results if a patient is receiving an intravenous infusion fluid and venipuncture is done at the same arm?

The effect of the fluid on test validity Signup and view all the answers

What may lead to an increase in plasma protein concentration when standing up compared to when supine?

Effect of posture Signup and view all the answers