IDA, ACI, SDA Flashcards
● Cells are smaller than usual
MICROCYTIC
MICROCYTIC
● Size:
<6 um
● Caused by 1 or more cell division due to the depression of mean corpuscular hemoglobin concentration (MCHC)
MICROCYTIC
● Anemia = division of RBC making the cell
MICROCYTIC
● Microcytic also inhibit
HYPOCHROMIA
● ↓ MCHC = ↓ overall hemoglobin concentration (no red or pink coloration of blood) =
HYPOCHROMIC
● Due to the problem of hemoglobin (there would be an impairment with the hemoglobin in the hemoglobin synthesis or an abnormality to heme or globin)
HYPOCHROMIC
● Components of a Hemoglobin:
(any abnormality of the two can cause a defect in the hemoglobin)
Heme and Globin
● Under a larger classification of anemia
- IRON DEFICIENCY ANEMIA (IDA)
- IRON DEFICIENCY ANEMIA (IDA)
● Etiology: A cause of anemia where in there is an (?)
abnormal iron metabolism
ANEMIA OF ABNORMAL IRON METABOLISM:
- Iron Deficiency Anemia
- Anemia of Chronic Disease (Sideroblastic Anemia)
Normal Hgb production and synthesis is dependent on (3 major requirement of Hb to be functional):
● Polypeptide chain (Adult Hb: Alpha & Beta chains)
● Protoporphyrin IX
● Iron (needs to be integrated to the Hgb in order to function well)
● Polypeptide chain (?)
● Protoporphyrin IX
Adult Hb: Alpha & Beta chains
(needs to be integrated to the Hgb in order to function well)
● Iron
The body contains approx:
4,000 mg Fe (60%: in form of Hgb)
IRON METABOLISM
For storage
For use
Largest source of iron is from the ingestion of food
For storage
For storage
Diet (?) → Mucosal cell (oxidized by the cells of the (?) to become Fe3+ or ferric form) → passed onto the bloodstream (transported to the bloodstream and(?) where it can be stored; Fe3+ will be bound to a storage protein known as (?) → forms FERRITIN
Fe2+ or ferrous form
duodenum and jejunum
liver
Apoferritin
: a storage protein that carries iron up to the bloodstream in which once the Fe3+ will go to bloodstream it will become a Ferritin
Apoferritin
: storage form of iron in the liver cells
Ferritin
stores metabolically active iron which we can get anytime if our body demands increased iron use
Ferritin
Iron → bloodstream → mononuclear phagocytic cells in the BM and other tissues
For use
: storage protein that transports Fe2+, Fe3+, and Apoferritin in the blood stream
Transferrin
carries iron from the bloodstream to the bm
Transferrin
: incorporates the iron to the hemoglobin.
Mononuclear phagocytic cells
: process in which the mononuclear phagocytic cells will incorporate the ferrous to rbc (hemoglobin)
Ropheocytosis
FACTORS AFFECTING IRON ABSORPTION
Promote Absorption
Reduce Absorption
Ferrous form
Promote Absorption
Ferric Form
Reduce Absorption
Inorganic Form
Promote Absorption
Organic Form
Reduce Absorption
Acids (HCl, Vit. C)
Promote Absorption
Alkalis (antacids, pancreatic juices)
Reduce Absorption
Solubilizing agents (Sugar, Amino Acids)
Promote Absorption
Precipitating agents: phosphates
Reduce Absorption
Iron Deficiency
Promote Absorption
Iron Excess
Reduce Absorption
Increased erythropoiesis
Promote Absorption
Decreased erythropoiesis, infection
Reduce Absorption
Iron in [?] form will be stored in ferritin
ferric
: stomach; increases the chance of the iron to be absorb
HCl
: medications
● antacids
: alkaline, so if iron is exposed in this kind of environment, it will have less absorption or decrease absorption rate in the intestines
● pancreatic juices
it will have less absorption or decrease absorption rate in the intestines
● pancreatic juices
● Iron is absorbed in an increased level
Iron Deficiency
● faster absorption because cells needs it
Iron Deficiency
● Regulatory hormones will try to block the absorption of iron to the intestines
Iron Excess
● absorption should not exceed
Iron Excess
● There is a need for you to absorb the iron so that it can be stored also in some parts of the cell
Increased erythropoiesis
● Iron absorption is also decreased
Decreased erythropoiesis, infection
IDA is caused mainly by 4 reasons:
- INTAKE OF IRON IS INADEQUATE FROM THE LEVEL OF DEMAND OF THE BODY.
- THE NEED FOR IRON EXPANDS AND COMPENSATION IS NOT MET
- IMPAIRED ABSORPTION OF IRON
- CHRONIC LOSS OF HEMOGLOBIN FROM THE BODY
Fe lost is not replaced
1mg/day
● Normally,[?] of Iron is lost and if the lost iron is not replaced by intaking or from the diet, then that could lead to the erythrocyte/ RBC being slowly starved of iron.
1mg/day
● Usually, Fe is lost in the
mitochondria of desquamated cells.
when our cells die in the skin, they slough off =
desquamate
the [?] has iron content
mitochondria
inside the cells that was desquamated is the
mitochondria
● Although, the body conserves iron from the [?], but it is not enough because the level that was lost is not the same to what the body can conserve
senescent RBC
● A replacement of [?] of iron from the diet every day is needed to maintain the RBC production.
1 mg
● If you have an inadequate intake eventually, [?] will be decreased since it is the source of RBCs iron (not present in the diet)
iron stores
● If the [?]:
↓ hemoglobin production (hemoglobin needs iron) = not present in the diet = anemia
iron stores are decreased
a. Iron needs increase →
no compensation
● no compensation for
iron needs
Iron needs increase → no compensation
● usually occurs during
infancy, childhood, adolescence, pregnancy and nursing (breastfeeding)
● during infancy, childhood, adolescence, the body needs an iron for
rapid growth
● need a lot of iron so that the body can grow in synchrony with RBC production.
babies
● [?] with no compensation = anemia.
↑ iron needs
- IMPAIRED ABSORPTION OF IRON
a. Malabsorption
b. Genetic mutations
c. Decreased stomach acidity
: most of the nutrition including iron is being malabsorbed (not absorbed properly)
Celiac disease
● A mutation in the regulatory protein called
matriptase 2 protein
: a regulatory protein which normally would keep hepcidin inactivated or not triggered but in a normal condition, so that it won’t stop ferroprotein to help in iron absorption
● Matriptase 2 Protein
: a regulatory/blocking hormone that blocks the absorption of iron in the intestinal lumen by binding to ferroportin
Hepcidin
: helps in the absorption of iron to the intestinal lumen in the absence of hepcidin
Ferroportin
In the mutation of matriptase 2, it activates
hepcidin
: increased in production = ferroportin will be inactivated = iron will not be absorbed in the lumen of the intestine = low iron or absorption
Activation of hepcidin
: continues production of hepcidin
● Activation of matriptase
: one of the factors that promote absorption
● acidity
if the stomach has a [?], that means that iron could not be absorbed very well
decreased acidity
example: [?] has something to do with GIT (stomach: acidic part of our body)
gastrectomy or bariatric surgery
: ferric is not reduced back to ferrous (Fe2+ or ferrous is the absorbable form of iron)
↓ stomach acidity
an alkaline; it will bind iron and decrease the rate of iron absorption
● Antacids
Loss of small amount of [?] from the body develops over a prolonged period of time.
heme iron
● Overtime, [?] decreases until it impairs with heme/iron production
iron content
- CHRONIC LOSS OF HEMOGLOBIN FROM THE BODY:
: the iron in the hemoglobin is passed out in the urine
Hemolysis (Paroxysmal Nocturnal Hemoglobinuria)
Due to hemolysis
Hemolysis (Paroxysmal Nocturnal Hemoglobinuria)
we can detect Hgb in urine
Hemolysis (Paroxysmal Nocturnal Hemoglobinuria)
: due to ulcerations (affects the absorption of iron)
Chronic GIT bleeding
: due to increased alcohol or aspirin ingestion (affects the absorption of iron in the GIT tract)
Gastritis
: specially hookworm, whipworm and schistosoma spp. (involved in causing iron deficiency anemia)
Parasitosis
: means that there is inflamed mucosal lining of the intestines (affects the absorption of iron)
Diverticulitis
: seen in females
Prolonged menorraghia (menstruation)/fibroid tumors/uterine malignancy
loss of RBC overtime = ↓ RBC count and iron stores are pressured to release iron so that the body can produce more Hgb and more RBC
Prolonged menorraghia (menstruation)/fibroid tumors/uterine malignancy
Renal diseases: such as
kidney stones, tumor or chronic UTI
IDA PATHOGENESIS
● RBC development is normal
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
● No evidence of iron deficiency in this phase
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
RBC production continues to rely on iron available in the transport compartment
STAGE 2
Exhaustion of the storage pool of iron (severely decreased iron stores/ferritin)
STAGE 2
Anemia not evident
STAGE 1& 2
Hgb and hct are low
STAGE 3
Iron deficiency: readily display frank anemia
STAGE 3
Compensation is remarkably slow (no iron available)
STAGE 3
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON Aka
Latent/subclinical IDA
the body’s iron reserve is sufficient to maintain the transport and functional compartments (the iron reserve is still sufficient)
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
● PB: will not exhibit anemia yet
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
STAGE 2
Iron stores or serum ferritin begins to decrease (first) but the Hgb will still appear Normal
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
RBC survival is 120 days: before iron is depleted, normal RBCs are already prodyced (RBC has enough iron and normal Hgb)
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
In 120 days that the iron stores are continuously depleting, it’s still not very obvious because RBC can still compensate with it (iron stores are not yet needed due to the presence iron)
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
Anemia is not evident (no evidence of IDA)
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
STAGE 2
● BM (iron staining): (-) iron stores
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
: very invasive; not performed unless there are no correlations with the symptoms and signs that a patient present
BM aspiration
In this stage there is really no evidence of leukemia: test should not be performed (usually skipped)
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
ongoing decrease in the iron store
STAGE 1: PROGRESSIVE LOSS OF STORAGE IRON
: transport compartment.
transferrin
When the RBC has lost its iron = ↓serum iron & free iron and transferrin
STAGE 2
transferrin in the serum contains iron (used up; no use for it to circulate if no iron is attached)
STAGE 2
because the bulk of circulating RBCs are produced during adequate iron availability so the overall hemoglobin measurement is still present (iron is used up in transferrin, but still attached to Hb)
STAGE 2
Hb: normal (no tests are required)
STAGE 1 & 2
: signifies an onset of iron deficient erythropoiesis (but we don’t have a way to know it unless we go to bone marrow to see the reticulocytes and hemoglobin)
↓ retic hemoglobin in STAGE 2
: smaller RBCs will be released from the bone marrow
↑ RDW in STAGE 2
muscles and other iron-dependent tissues will be affected
STAGE 2
↓ serum iron and serum ferritin
STAGE 2
: transferrin is empty (↑ capacity to carry iron)
↑ TIBC in STAGE 2
: is an indirect measure of transferrin’s binding capacity
Total iron binding-capacity (TIBC) in STAGE 2
: clump at the surface of the RBC to capture more iron
↑ Transferrin receptors in STAGE 2
↓ Transferrin
STAGE 2
: is a portion of hemoglobin where iron is integrated so the iron holds onto it; this is where iron is attached; iron will accumulate because there’s no protein attached into it (clumping on empty RBC)
Free erythrocyte protoporphyrin (FEP) in STAGE 2
: decreases because it’s a compensatory mechanism of the body (inactivates due to lack of iron)
Hepcidin in stage 2
a natural response of the body against iron depletion
Hepcidin in stage 2
● BM (Prussian blue BM iron staining): (-) Hemosiderin or any iron containing cells/protein are
STAGE 2
: storage protein of iron that is usually stained in the bone marrow; not present due to lack of iron = iron deficient erythropoiesis
hemosiderin in STAGE 2
Hb: normal
STAGE 1 & 2
Anemia is evident (w/ s&s; cbc shows abnormalities of rbc cells, Hb, and Hct)
STAGE 3
↑ FEP, ↑ Transferrin receptors , ↑ EPO (very prominent)
STAGE 3
: a hormone that compensates to anemia by increasing the amount of rbc (anemia still persist due to lack of iron)
↑ EPO
No specific signs and symptoms
IDA
GENERAL SYMPTOMS AND SIGNS OF ANEMIA
● Fatigue
● Shortness of breath
● Palor
● Palmar crease (for dark-skinned individuals)
(for dark-skinned individuals)
● Palmar crease
IDA HIGH RISK INDIVIDUALS
Menstruating women/childbearing ages
Adolescent girls
Growing children
LOW RISK
Men
Post menopausal women
: inadequate iron-containing food in the diet w/ loss of rbc, iron and no compensation
Menstruating women
: needs to have adequate iron level otherwise they are predispose to having IDA during pregnancy (needs a lot of iron content because it is needed for fetus’ growth)
Childbearing ages (24 or 25 y/o)
prone to IDA especially during pregnancy
Childbearing ages (24 or 25 y/o)
: breastfeeding w/ low iron (IDA) affects the baby
Nursing newborns
due to rapid growth (rapid erythropoiesis = more iron = more hemoglobin & more normal rbcs)
Adolescent girls ; Growing children
IDA is rare (there is only 1 mg/day that is being lost)
Men ; Post menopausal women
there is no rate of association to IDA
Men ; Post menopausal women
DEVELOPMENT OF IDA IS POSSIBLE IN
REGULAR ASPIRIN AND ALCOHOL INGESTION
HOOKWORMS (N. amerricanus, A. duodonale), WHIPWORM (T. trichuria), AND SCHISTOSOMA SPP. (S. mansoni, S. haematobium)
EXERCISE (SOLDIERS W/ PROLONGED MANEUVERS/RUNNERS)
: causes decrease acidity in the stomach = decrease/malabsorption of iron
Gastritis and Chronic bleeding
: attach their sucking/ventral teeth of the lumen of the intestine and suck blood; blood loss is 0.03 ml per day
N. americanus
: blood loss is 0.15-0.25 ml per day
A. duodonale
(normal blood loss: )
1mg/day
: least effect on IDA
T. trichuria (whipworm)
blood loss is 0.05 ml per day
T. trichuria (whipworm)
: iron is lost through urine
S. mansoni and S. haematobium
: is an exercise induced-hemoglubinuria
March hemoglubinuria
the rbc`s are hemolysed due to foot pounding trauma (the iron will be salvaged and will be excreted in the urine
March hemoglubinuria
urine is (+) hemoglubinuria)
March hemoglubinuria
CLINICAL FEATURES Aside from general manifestations:
PARASTHESIA
GLOSSITIS
AGULAR CHEILOSIS
DIFFICULTY SWALLOWING DUE TO WEBS OF TISSUE IN B/W ESOPHAGUS AND HYPOPHARYNX
CHRONIC GASTRITIS; SPELOMEGALY
: eating disorder for non-edible things
PICA
: due to IDA there is spooning of fingernails (spoonlike/sagging/curvy fingernails attached to the skin)
Koilonychias
Atrophy (↓size) of the tongue due to excessive soreness
GLOSSITIS
IDA proliferates in the epithelial cells that makes up the tongue = soreness = tongue atrophies
GLOSSITIS
Cracking at the mouth corners
AGULAR CHEILOSIS