Flashcards in EXAM #1: ANEMIA 2.0 Deck (40)
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1
What is polycythemia?
An abnormal increase in Hb concentration in the blood
2
What is the RBC count in thalassemia?
High
3
How do you calculate an absolute retic. count?
(RBC# x %reticulocytes)/ 100
4
What do you know if the absolute retic. count is less than 100,000 microL?
NO retirculocytosis
5
What are the two primary causes of megaloblastic anemia?
- Vitamin B12 deficiency
- Folic acid deficiency
*Drugs can also cause megaloblastic anemia
6
What are the causes of nonmegaloblastic macrocytic anemia?
1) Hypothyroidism
2) Liver disease
3) Alcoholism
4) Myelodysplastic syndromes
7
Outline the BIG FAT RED CELLS mnemonic.
B= B12
I= Inherited
G= GI disease/ surgery
F= Folic acid
A= Alcholism
T= Thiamine response
R= Reticlocyte miscount
E= Endocrine
D= Dietary
C= chemotherapy
E= Erythro
L= Liver
L= Lesch-Nyhan Syndrome
S= Splenectomy
8
What are the signs of anemia?
Pallor
Pica
Koilonychia
9
What are the PBS hallmarks of megaloblastic anemia?
1) MCV greater than 100
2) Hypersegmented neutrophils
10
How do the total body stores of B12 and Folate compare?
B12= 2-5mg
Folate= 5-10mg
11
How does the daily requirement of B12 and Folate compare?
B12= 1-3 micrograms
Folate= 50-100 mircograms
12
What is the source of B12? What is the source of Folate?
B12= animals
Folate= plants
13
Compare the sites of absorption for B12 and Folate.
B12= terminal ileum
Folate= proximal jejunum
14
What is the main difference in symptomatic outcomes of B12 deficiency and Folate deficiency?
B12= neurologic complications
Folate= NTD
15
List the specific causes of B12 deficiency.
1) Vegans--veggie man
2) Pernicious anemia--prune anemone
3) Gastric bypass--stomach stapler
4) Malabsorption--mallet
5) Celiac spure--sprouts
6) Enteritis--enter intestines
7) Diphyllobathrium latum--fish tapeworm
8) Chron's Disease
16
What is the functional role of Vitamin B12?
Vitaminc B12 is an important cofactor for for conversion of:
1) Methylmalonic acid to succinly-CoA (Methylmalonyl-CoA mutase)
2) Methylation of homocysteine to methionine (methionine synthase)
17
How does B12 deficiency lead to neruologic symptoms?
Build-up of methylmalonic acid
18
What is difference between folate and B12 deficiency in regards to methylmalonic acid?
B12= methylmalonic acid increase
Folate= no increase
BOTH will be high in homocysteine
19
What is the presentation of Congenital Transcobalamin II Deficiency?
Infantile anemia in a few weeks of birth
20
What is the presentation of Congenital Methylmalonic Acidemia?
Infants ill from birth
21
What is the presentation of excessive NO inhalation?
*Irreversible oxidation of methylcobalamin*
- Presents like B12 deficiency
22
What is the major difference between the symptoms of B12 deficiency and folate deficiency?
Neurological symptoms
23
What lab values are diagnostic for B12 deficiency?
1) Increased MCV
2) Decresed retic.
3) High methylmalonic acid
4) High homocysteine
24
How is B12 deficiency treated?
1) Find the cause
2) Supplement w/ 1,000 micrograms SC or IM for a month, then monthly
25
What electrolyte needs to be monitored with B12 deficiency?
Potassium
26
What are the complications of B12 deficiency?
1) Demyelination of the posterior spinal column and lateral corticospinal tract
2) Infertility
3) Cervical smear abnormalities
27
What post-op patient populations must be B12 supplemented?
Total gastrectomy
28
What is pernicious anemia?
- Autoimmune disorder directed against gastric parietal cells
- Results in absent gastric acid and IF
29
What test can be done to diagnose Pernicious Anemia?
Schilling Test
30
