Nokea
Through the process of hematopoiesis, stem cells differentiate into either myeloid or lymphoid stem cells. Into what do myeloid stem cells further differentiate?
- A. Leukocytes
- B. Natural killer cells
- C. Cytokines
- D. Platelets
- E. Erythrocytes
Correct Answer: A,D,E
Rationale: Myeloid stem cells differentiate into three broad cell types: erythrocytes, leukocytes, and platelets. Natural killer cells and cytokines do not originate as myeloid stem cells.
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A patients low hemoglobin level has necessitated transfusion of PRBCs. Prior to administration, what action should the nurse perform?
- A. Have the patient identify his or her blood type in writing.
- B. Ensure that the patient has granted verbal consent for transfusion.
- C. Assess the patients vital signs to establish baselines.
- D. Facilitate insertion of a central venous catheter.
Correct Answer: C
Rationale: Prior to a transfusion, the nurse must take the patients temperature, pulse, respiration, and BP to establish a baseline. Written consent is required and the patients blood type is determined by type and cross match, not by the patients self-declaration. Peripheral venous access is sufficient for blood transfusion.
A patient has been scheduled for a bone marrow biopsy and admits to the nurse that she is worried about the pain involved with the procedure. What patient education is most accurate?
- A. Youll be given painkillers before the test, so there wont likely be any pain?
- B. Youll feel some pain when the needle enters your skin, but none when the needle enters the bone because of the absence of nerves in bone.
- C. Most people feel some brief, sharp pain when the needle enters the bone.
- D. Ill be there with you, and Ill try to help you keep your mind off the pain.
Correct Answer: C
Rationale: Patients typically feel a pressure sensation as the needle is advanced into position. The actual aspiration always causes sharp, but brief pain, resulting from the suction exerted as the marrow is aspirated into the syringe; the patient should be warned about this. Stating, Ill try to help you keep your mind off the pain may increase the patients fears of pain, because this does not help the patient know what to expect.
Which of the following circumstances would most clearly warrant autologous blood donation?
- A. The patient has type-O blood.
- B. The patient has sickle cell disease or a thalassemia.
- C. The patient has elective surgery pending.
- D. The patient has hepatitis C.
Correct Answer: C
Rationale: Autologous blood donation is useful for many elective surgeries where the potential need for transfusion is high. Type-O blood, hepatitis, sickle cell disease, and thalassemia are not clear indications for autologous donation.
A patient is scheduled for a splenectomy. During discharge education, what teaching point should the nurse prioritize?
- A. The importance of adhering to prescribed immunosuppressant therapy
- B. The need to report any signs or symptoms of infection promptly
- C. The need to ensure adequate folic acid, iron, and vitamin B12 intake
- D. The importance of limiting activity postoperatively to prevent hemorrhage
Correct Answer: B
Rationale: After splenectomy, the patient is instructed to seek prompt medical attention if even relatively minor symptoms of infection occur. Often, patients with high platelet counts have even higher counts after splenectomy, which can predispose them to serious thrombotic or hemorrhagic problems. However, this increase is usually transient and therefore often does not warrant additional treatment. Dietary modifications are not normally necessary and immunosuppressants would be strongly contraindicated.
The nurse is describing normal RBC physiology to a patient who has a diagnosis of anemia. The nurse should explain that the RBCs consist primarily of which of the following?
- A. Plasminogen
- B. Hemoglobin
- C. Hematocrit
- D. Fibrin
Correct Answer: B
Rationale: Mature erythrocytes consist primarily of hemoglobin, which contains iron and makes up 95% of the cell mass. RBCs are not made of fibrin or plasminogen. Hematocrit is a measure of RBC volume in whole blood.