Disorders of Hemostasis Quiz

Even when the platelet count is in the normal reference range, a phlebotomist can still encounter a bleeding problem during a blood draw.

• True

• False

A phlebotomist is often required to perform tests such as PT, APTT, bleeding time, and platelet count to assess hemostatic function during routine blood work.

• True

• False

A phlebotomist is performing a blood draw on a patient with von Willebrand’s disease. This disease is an acquired disorder of platelets.

• True

• False

A phlebotomist needs to know that the vitamin-K-dependent coagulation factors are II, VII, IX, and X for proper blood clotting during venipuncture.

• True

• False

A patient comes in for a phlebotomy procedure. They have a history of Idiopathic thrombocytopenic purpura (ITP), an inherited platelet disorder.

• True

• False

A phlebotomist is dealing with a patient who has a disorder of hemostasis. Which of the following is true of this patient's acquired and inherited disorder?

• It can cause either abnormal bleeding or abnormal thrombus formation during the blood draw.

• Drugs or treatments can accelerate clot formation, affecting the blood draw.

• It requires laboratory testing to confirm.

• All of the above

All of the following statements are true about phlebotomy EXCEPT:

• It is a procedure that removes blood from the body.

• Phlebotomy is often used to diagnose illness or for blood donation.

• Phlebotomists are trained professionals who perform this procedure.

• Phlebotomy is a treatment for hemophilia.

A phlebotomist is preparing to draw blood from a patient with hemophilia A. Which of the following statements about this condition is true?

• It is caused by functional deficiency of coagulation factor VIII, the VIII:C protein.

• The symptoms usually appear in early infancy.

• It is a functional deficiency in factors VIII and IX.

• It is a functional deficiency of coagulation factor IX.

A phlebotomist is preparing to draw blood from a patient. Which of the following conditions would NOT affect the coagulation factor of the blood sample?

• von Willebrand’s disease

• vitamin K deficiency

• DIC

• anticoagulant therapy

A phlebotomist is concerned about a patient's prolonged bleeding time after a venipuncture. Which more definitive tests should the phlebotomist suggest to the doctor?

• platelet adhesion

• platelet aggregation

• prothrombin time

• only (a) and (b)

• all of the above (a–c)