Hematology Flashcards
RBC Indices
-2-: -1-; expression of the average volume and -2- of individual -3-
> Important classification: -4-: -5-
- Mean corpuscular volume (MCV)
- Size
- erythrocytes
- Microcytic
- < 80 fl
RBC Indices - Size
> -1-: -2-
> -3-: -4-
- Normocytic
- 80-100 fL
- macrocytic
- > 100 fL
RBC Indices -1-: expression of the proportion of each RBC occupied by Hgb as a percentage; -2- of the cell; more reliable for measureing RBC pathologies than MCH > -3-: 32-36% (32-33% for newborns) > -4-: <32% > -5-: >36% (>33% for newborns)
- Mean corpuscular hemoglobin concentration (MCHC)
- “color”
- Normochromic
- Hypochromic (pale, increased central clearing)
- Hyperchromic
RBC Indices
-1-: -2- -3-; experssion of the average amount and -1- of hgb contained in a single erythrocyte; not as useful
> Physiologic: -3-
- Weight
- Mean corpuscular (MCH)
- hemoglobin
- 27 - 33 pg
RBC Indices -1- > IDA: -2- > -3-: -4- or slightly decreased > -5-: physiologic -1-
- Red cell Distribution Width (RDW)
- increased
- Thalassemia
- physiologic
- ACD
RBC Indices
-1-
> No. of -2- RBCs in circulation
> Expressed as a -3-
- Ret count
- new/young (i.e., immature)
- percentage (physiologic is 0.5-1.5%)
RBC Indices - Ret Count
Index of -1- and -2-
> Also -3-
- bone marrow health
- response to anemia
- response to therapy (sign of improving anemia as RBCs are released from the marrow)
Anemias
> Def: Anemia is not a disease itself, but rather a -1- that results in a low number of RBCs
> Classification: Anemias are classified according to RBC -2- and hgb -3-
- sign of an underlying condition
- size (MCV)
- concentration (MCHC)
Anemias - Classification
-1-: -2-, -3-, & thalassemia
- Microcytic/hypochromic
- IDA
- lead poisoning
Anemias - Classification
Microcytic/hypochromic: -2-, -3-, & -4-
- IDA
- thalassemia
- lead poisoning
Anemias - Classification
Normocytic/normochromic: -1-, acute -2-, -3-, -4-, -5-
- ACD
- blood loss
- early IDA
- infection
- medication
Anemias - Classification
-1-: -2-, -3-, early IDA, acute -4-, -5-
- Normocytic/normochromic
- infection
- ACD
- blood loss
- medication
Anemias - Classification
-1-: vitamin -2- deficiency, -3- deficiency, -4- anemia
- Macrocytic/normochromic
- B12
- folate
- pernicious
IDA
> Caused by -1-, increased needs, or -2-
> In -3-, iron deficiency is due to a(n) -1- (e.g., -4-, -5-) or microhemorrhage from the gut due to an early intake of cow’s milk (<12 months old)
- decreased iron intake
- slow GI blood loss
- infancy
- low-iron formula
- exclusive breast-feeding w/o iron supplementation
IDA
> In -1-, ID is often due to a(n) -2- the expense of iron-rich solid foods
> In -3-, -4- contribute to an inadequate -5-, specifically in girls after menarche
- toddlers
- increased reliance on dairy milk at
- Adolescents
- dieting practices
- intake of iron (green, leafy vegetables for one)
IDA - S/S
Severity depends on -1-
> Easy -2- and -3-
> -4- (-5-)
- degree of anemia
- fatigability
- lethargy
- Pica
- mostly ice
IDA - S/S
> Postural -1- in -2-
> -3-
> Flat, brittle or -4-
- hypotension
- severe anemia
- brittle hair
- spoon-shaped nails
IDA - Lab/Dx
> Low -1-
> low -2-
> Increased -3-
- MCV
- MCHC
- RDW
IDA - Lab/Dx
> Serum -1- < 12 mcg/L (indicates depleted -2-)
> -3-: low incases of inadequate iron intake; elevated in cases of blood loss & resolving anemia
- ferritin
- iron stores
- Ret count
IDA - Mgmt
A(n) -1- is required while the cause is being managed and should be contineud until the resolution of the underlying process
> Treat with -2- once daily until -3-, then
> Replace -4-
- medicinal iron supplement
- elemental iron 3-6 mg/kg/day
- Hgb returns to physiologic levels
- iron stores: 2-3 mg/kg/day for 4 months
IDA - Mgmt
> Take iron supplement with -1-; take at least 1 hour before or 2 hours after eating (empty stomach)
> Consider -2- to prevent -3- iron therapy
> Discuss the importance of -4-
- Vitamin C to improve absorption
- miralax
- constipation caused by
- adherence to iron regimen
Thalassemia
Def: a group of -1- disorders characterized by a(n) -2- and -3- chains
> -4- of each gene -5-
- hereditary
- abnormal synthesis of alpha (4 genes)
- beta (two genes) globin
- One or more
- can be missing
Thalassemia
> Type is determined by -1-
> Severity depends on -2- affected
> Usually found in individuals -3-
- which genes are missing (alpha vs. beta thalassemia)
- number of genes
- of Mediterranean descent
Thalassemia - Causes/Incidence
> Second most common cause of -1-
> Often identifed during perinatal period or -2-
> -3- genetic disorder
- microcytic anemia
- newborn screening
- Autosomal Recessive
Thalassemia - S/S
-1- to -2- of anemia
> -3- color to -4-
- varies from asymptomatic
- severe s/s
- Pale or bronze
- skin
Thalassemia - S/S > -1- > -2- > -3- > Frontal -4-
- tachypnea
- tachycardia
- hepatosplenomegaly
- bossing
Thalassemia - PE Findings > -1- >> -2- >> -3- >> -4-/severe anemia
- Infancy
- FTT
- irritability
- pallor
Thalassemia - PE Findings > -1- >> -2- >> -3- >> -4- due to -5-
- Older child
- bony changes (erythropoiesis)
- splenomegaly
- iron overload
- multiple transfusions
Thalassemia - Lab/Dx > CBC shows >> -2- >> -3- >> -4-
- low hgb
- low MCV (microcytic anemia)
- hypochromic RBCs
Thalassemia - Lab/Dx
> -1-
> -2-
> -3-
- high ret count
- hgb electrophoresis
- high ferritin
Thalassemia - Mgmt
> referral to -1-
> obtain a -2- (-3-) of affected relatives for AG
- hematology
- genogram/family history
- 3-generations
Sickle Cell Anemia
Def: A -1- in which abnormal hgb leads to the dev of -2-, which have a -3-
- chronic hemolytic anemia
- sickle-shaped RBCs
- shorter life-span