What should the nurse do to prevent hemoconcentration when ...

[wenmo]

What should the nurse do to prevent hemoconcentration when collecting blood specimens?
 
  a. Encourage the patient to drink fluids.
  b. Do not keep the tourniquet on the arm too long.
  c. Dilute the specimen immediately.
  d. Use a large-bore needle.

Question 2

The nurse is drawing a patient's blood into a red-topped tube. This tube has
 
  a. no additive c. sodium heparin
  b. EDTA d. sodium oxalate

[ebe]

Answer to Question 1

B
Hemoconcentration is the reduced volume of plasma water and the increased concentration of blood cells, plasma proteins, and protein-bound constituents. It can be caused from prolonged standing or a prolonged time of application of a tourniquet during venipuncture. The nurse should not keep the tourniquet on the patient's arm too long.

Answer to Question 2

A
Collecting tubes are universally coded as follows: red-topped tube, no additive; lavender tube, EDTA; green tube, sodium heparin; and black tube, sodium oxalate.