Final Exam Flashcards
(190 cards)
What is anemia?
a deficiency in the
- number of RBCs
- quantity of Hgb
- vol of packed RBCs (Hct)
What are 3 causes of anemia?
- blood loss
- impaired production of RBCs
- Increased destruction of RBCs
What is the critical number of severe anemia?
Hgb less than 6 g/dl
What is the nursing intervention when Hgb is less than 6 g/dl?
blood transfusion
What are some clinical manifestations for anemia?
- pallor
- jaundice
- increase in CO
- fatigue
- sensitivity to cold
- irritability
- pain
- hypoxia with sickle-cell crisis
9.
What type pf anemia is caused by the presence of large RBCs?
Megaloblastic anemia
If Sam has Megaloblastic anemia what are 2 factors he may be deficient?
- Vitamin B12 (Cobalamin)
2. Folic Acid
What is necessary for Vitamin B12 (Cobalamin) to be absorbed by the body?
Intrinsic factor (IF).
What is the main cause of Cobalamin Deficiency/
pernicious anemia
What is pernicious anemia?
caused by the lack of IF. The gastric mucosa is not secreting IF because of either gastric mucosa atrophy or autoimmune destruction of parietal cells.
What are other causes of pernicious anemia?
- Gastrectomy
- Nutritional deficiencies
- Chronic alcoholism
- Hereditary enzymatic defects
Without IF what is the result of B12?
it cannot be absorbed by the body. pernicious anemia leads to B12 deficiency
Folic Acid Deficiency
a cause of megaloblastic anemia
What is Folic acid required for?
DNA synthesis
Define pancytopenia
decrease in all blood cell types (RBCs, WBCs, and platelets)
What type of anemia is a result of pancytopenia?
aplastic anemia
What part of the body does aplastic anemia affect most?
bone marrow
If Sam has aplastic anemia, what are 2 methods to treat his condition?
- blood transfusions
2. Bone marrow Transplant
Describe hemolytic anemia
a condition caused by the destruction or hemolysis of RBCs at a rate that exceeds production
What are the results of hemolytic anemia?
jaundice
enlarged spleen and liver
renal tubules obstruction
Describe Sickle Cell Disease (SCD)
Presence of an abnormal form of Hgb in the erythrocyte
What happens to red blood itself when a person has SCD?
it become sickle shaped, stiffens, and elongates
What are those with SCD prone to develop?
Infections
What are the nursing interventions for someone with SCD?
- Pain management
- give O2
- Increase hydration (IV and PO)
- antibiotics