1.2 + 1.3 highlights pt 2 Flashcards

Anemias, etc

1
Q

1) About 10% of the avg intake of 10/15mg iron/ day is absorbed in the stomach, ________, and upper _________under acidic conditions.
2) Absorbed iron is released into blood > picked up by transferrin (iron transport protein) > delivered to body and stored in the ______

A

1) duodenum; jejunum
2) liver

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2
Q

1) Dietary iron present as _______is efficiently absorbed (10–20%) but __________iron less so (1–5%), largely because of interference by phosphates, tannins, and other food constituents.
2) Most of the Fe adults have in their body (3-4 g) is in ____; the rest is stored in the form of ferritin and __________

A

1) heme; nonheme
2) Hgb; hemosiderin

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3
Q

The RDA of iron is based on an individual’s ___ and _______.

A

age and sex

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4
Q

Ferroportin is the major iron transporter from the diet across the intestinal lumen; what does it also do?

A

Also facilitates the transport of iron to apotransferrin in macrophages for delivery to erythroid progenitor cells prepared to synthesize hemoglobin

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5
Q

Hepcidin:
1) What does it do?
2) When is more of it produced?

A

1) Negatively regulates iron transport by promoting the degradation of ferroportin
2) During inflammation (positive acute phase reactant)

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6
Q

Iron deficiency anemia:
1) What type is it?
2) The most important cause of iron deficiency anemia in adults is chronic blood loss, especially ___________ and __________ blood loss.

A

1) Microcytic anemia
2) menstrual; GI

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7
Q

Iron deficiency anemia:
1) ___________ blood loss plays a major role in iron metabolism.
2) Women with ____________ will almost always become iron deficient without iron supplementation.

A

1) Menstrual
2) menorrhagia

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8
Q

Iron defic. anemia:
1) In general, iron metabolism is balanced between ________ of 1 mg/day and _______ of 1 mg/day.
2) What 2 things upset the iron balance, since requirements increase to 2–5 mg of iron per day?
3) Why can’t normal dietary iron supply these requirements?

A

1) absorption; loss
2) Pregnancy and lactation
3) Medicinal iron supplementation is needed during pregnancy and lactation (also menorrhagia).

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9
Q

Iron defic. anemia:
1) Decreased iron absorption can also cause iron deficiency; give 3 examples
2) Give another reason for this condition

A

1) Celiac, Gastric resection or jejunal bypass surgery
Zinc deficiency
2) High-intensity athletics

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10
Q

Differentiate between heme iron and nonheme iron

A

1) From animal sources = heme
2) From plant sources = nonheme

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11
Q

What are some weird Sx of iron deficiency anemia?

A

1) Pica: craving for nonfood items (clay/dirt, rocks, chalk, paper, etc.); unknown mechanism
a) Pagophagia: craving for ice; esp. common and specific for iron-deficiency (very specific to this type of anemia)
3) Restless leg syndrome (RLS)
4) Skin/mucosal changes:

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12
Q

Plummer-Vinson Syndrome can result from what type of anemia?

A

Iron deficiency

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13
Q

Reticulocyte count is inappropriately _____ with iron deficiency anemia

A

low

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14
Q

1) Ferritin is a measure of what?
2) In someone who is anemic, a ferritin level _____ng/mL almost always indicates iron deficiency
3) Even without anemia, a ferritin value _______ ng/mL (in the absence of scurvy) is a highly reliable indicator of reduced iron stores.

(know these numbers)

A

1) total body iron stores
2) <30
3) <12

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15
Q

True or false: normal/elevated ferritin does not exclude iron deficiency. Explain

A

True; Levels may rise in response to inflammation (positive acute phase reactant) or other stimuli

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16
Q

As iron deficiency progresses:
1) __________ stores are low
2) ____________ values decline to <30mcg/dL (low)
3) Transferrin (Tf) / Total iron binding capacity (TIBC) levels do what to compensate?
4) What do all these things lead to?

A

1) Ferritin stores are low
2) Serum iron
3) Rise to compensate (high)
4) Low Transferrin saturation (TSAT) (<15%)

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17
Q

Increased transferrin/TIBC with low serum iron leads to what?

A

Low transferrin saturation

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18
Q

Iron Deficiency Anemia: Describe what the Peripheral Smear looks like

A

1) As the MCV falls, the blood smear shows hypochromic microcytic RBCs
2) With further progression, anisocytosis (variation in size) and poikilocytosis (variation in shape) develop.
3) Severe will produce a bizarre peripheral blood smear

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19
Q

Give 3 examples of peripheral smear results with severe iron def. anemia

A

1) Severely hypochromic cells
2) Target cells (bulls-eye appearance)
3) Pencil-shaped or cigar-shaped cells

20
Q

Iron def. Tx:
1) Oral iron: Most appropriate form is _________ (allows for dose titration to minimize side effects; may cause tooth discoloration) or ______ containing ferrous salts2
2) What is a common Tx and its dose? List 2 side effects

(know this dose)

A

1) liquid; tablet
2) Ferrous sulfate, 325 mg (tableta) PO once daily (QD) or every other dayb (QOD) on an empty stomach
-nausea, constipation

21
Q

Oral iron:
1) Ideally avoid taking with food, and especially avoid taking with __________ (e.g., milk)
2) _________ acidity helps with absorption (e.g., avoid taking with antacids)
3) Taking with_____________ or ____________ may increase absorption (varying efficacy results, under study)

A

1) Calcium
-taking with food reduces side effects but also iron absorption
2) Gastric
3) Vit. C (ascorbic acid) or orange juice

22
Q

Oral iron for iron def. anemia
1) Duration of therapy: continue treatment for ________ months after restoration of normal hematologic values to replenish iron stores.
2) What is the most common reason for failure of response?
3) Give 3 other reasons for failure of Tx

A

1) 3–6
2) Noncompliance
3) Poor iron absorption, Incorrect diagnosis, underlying disease

23
Q

Potential indications for IV iron include what?

A

1) Intolerance of or refractoriness to oral
2) GI disease
3) Continued blood loss (ex: dialysis)
4) Second or third trimesters
5) Severe anemia/ rapid correction

24
Q

1) What IV formulation makes IV use of iron safer?
2) What is the dose?
3) When can it be dosed?

A

1) Low-molecular-weight iron dextran
2) 1-1.5 g in most patients
3) Single (total dose) infusion or multiple

25
Q

What med can you give to pts on dialysis who are losing iron?

A

Ferric pyrophosphate citrate (Triferic)

26
Q

1) When should you see pts begin to feel better with iron Tx?
2) How long should you continue Tx?

A

1) Within first few days
2) Administer iron until ferritin levels and TSAT normalize

27
Q

Iron def. anemia:
Patients should be referred to a ______________ if:
a) the suspected diagnosis is not confirmed or
b) if they are not responsive to oral iron therapy

A

hematologist

28
Q

Anemia of Chronic disease (ACD) / Anemia of Inflammation (AI):
1) Occurs when an acute or chronic ____________ condition leads to increased ________ production and elevated hepcidin
2) What 3 things are it often associated with? (as well as a variety of other conditions)

A

1) inflammatory; cytokine
2) infectious, inflammatory, or neoplastic disease

29
Q

The 2nd most common cause of anemia worldwide is what?

A

Anemia of Chronic disease (ACD) / Anemia of Inflammation (AI)

30
Q

ACD/ AI:
It is an immune-mediated dysregulation of iron homeostasis via ____________, the master regulator of iron homeostasis

31
Q

For ACD/AI, list the following:
1) Ferritin (iron stores)
2) TIBC (transferring)
3) Other CBC findings
4) MCV

A

1) High
2) Low
3) Normochromic
4) Normocytic

32
Q

For iron def. anemia, list the following:
1) Ferritin (iron stores)
2) TIBC (transferring)
3) Other CBC findings

A

1) Low
2) High
3) Hypochromic

33
Q

In most cases of ACD/AI, no treatment of the anemia is necessary and primary management focuses on _________________________ causing the anemia

A

addressing the underlying condition

34
Q

True or false: you can have ACD/AI + concurrent iron deficiency anemia

35
Q

Anemia of Kidney Disease
1) Affects 90% of patients with GFR ____.
2) Caused by decreased _______________ , decreased lifespan of RBCs, bone marrow suppression (from uremic toxins), and blood destruction during hemodialysis
3) Usually _______chromic and normocytic with _____ retic count (hypoproliferative)

A

1) <30
2) erythropoietin
3) normochromic and normocytic with low retic count (hypoproliferative)

36
Q

Sideroblastic Anemias (group):
1) What does it cause? What accumulates?
2) What are the Sx?
3) How is it diagnosed?

A

1) Hgb synthesis is decreased; iron
2) Anemia Sx
3) Ringed sideroblasts in bone marrow

37
Q

Sideroblastic Anemias (group):
1) What is the most common cause?
2) What type of anemia is it?
3) What are 2 characteristic findings?

A

1) lead poisoning
2) Microcytic anemia
(Sideroblastic = S in TICS for common causes of microcytic anemias)
3) Coarse basophilic stippling of RBCs, elevated serum lead levels

38
Q

1) Define pancytopenia
2) Define leukopenia (numerically)
3) Define neutropenia (numerically)

A

1) decrease in all peripheral blood lineages (anemia, neutropenia, thrombocytopenia)
2) WBC <4500 cells/microL
3) Absolute neutrophil count (ANC) <1800 cells/microL

39
Q

1) List 2 clinical findings of neutropenia
2) What is the most common cause of neutropenia?

A

1) Stomatitis; infection
2) Drug reaction

40
Q

Fever in neutropenia =________________ until proven otherwise

A

life-threatening infection

41
Q

Neutropenia:
1) How do you Tx if drug-induced?
2) ___________ neutropenia may be life-threatening: admit

A

1) stop the offending medication
2) Febrile

42
Q

1) Define polycythemia (Erythrocytosis)
2) What are the 2 main types/ causes?

A

1) Increased Hgb and/or Hct
2) Increased RBC mass (absolute polycythemia) or
Hemoconcentration (decreased plasma volume) (relative polycythemia)

43
Q

Primary polycythemia
1) What is changed abt RBC progenitor cells?
2) What is a specific kind? What is the most common complication of this? What is the Tx of choice?

A

1) Mutation
2) Polycythemia vera (PV); thrombosis; Serial phlebotomy

44
Q

Burning pain or itchiness in extremities (esp after bathing) is a Sx of what condition?

A

Polycythemia vera (PV)

45
Q

1) What things are absent in secondary polycythemia that are present in primary?
2) What is the most common cause of secondary?

A

1) thrombocytosis/leukocytosis
2) hypoxia

46
Q

Thrombocytosis:
1) Define it numerically
2) List 3 complications of this condition

A

1) Platelet count >450,000/microL
2) Thrombosis, bleeding, + vasomotor symptoms