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108 Cards in this Set

  • Front
  • Back

average human has how much blood

4-6 L

plasma is what % of blood

50-55

blood cells is what % of blood

45-50

nitrogenous substances (5)

urea, uric acid, xanthine, creatinine, amino acids

what % water in plasma

91-92

term for formation of blood cells

hematopoiesis

all normal blood cells thought to derive from

single pluripotent stem cell with mitotic capability

3 types of RBC

immature RBC, reticulocyte, mature RBC

immature RBC

nucleated

reticulocyte

RBC that still have their endoplasmic reticulum

RBC last how long

120 days

how do RBC die

by squeezing through capillary

most RBC break where

spleen

broken RBC creates

unconjugated bilirubin

major component of RBC is

hgb

how many types of hgb

300

hgb A

normal

hgb S

sickle cell disease

hgb A1C

copmliance with dm diet

RBC outer cells contains

blood group antigens A and B and the Rh factor

hgb is a

protein

heme is a

large flat iron-protoporphyrin disk

hgb is "saturated" when

all four heme sites are carrying o2

the rate at which hgb is synthesized depends

on the availability of iron

iron absorbed in duodenum and transported through plasma by what to where

transferrin to the transferrin iron receptors on the red cell membrane

iron and red cell membrane engulfed into

RBC

after RBC engulfment, iron is then what and stored as what or used to what

released and stored as ferritin or used to synthesize heme

normal RBC development requires

adequate supplies of protein, vitamins, and minerals

specific vitamins for erythropoiesis

folate, b12

abnormal erythrocytes are called

megaloblasts

erythropoiesis governed mostly by

tissue oxygen needs

what is main stimulus for RBC production that does not directly act on bone marrow

hypoxia

hypoxia sensed where

kidneys

how long does it take RBC to mature and be released

5 days

globin does what after hgb is phagocytosed and reduced to globin and heme

globin reenters amino acid pool

iron is what RBC dies

recycled - brought to bone marrow or liver

bilirubin is a

toxic substance

what is required for heme production

iron

excretion of iron is

minimal

if no iron consumed for a year, body stores would decline by only

10%

majority of iron loss occurs from

blood loss

who needs more iron

infants, pregnant, chronic blood loss

8 foods high in iron

liver, muscle meats, fish, fowl, egg yolk, beans, wheat germ, cereal grains, green leafy vegetables

what is required for synthesis of DNA molecules forming RBC

vit b12

vit b12 is large and cannot

easily penetrate mucosa of GI tract

vit b12 bound to what for absorption

glycoprotein called intrinsic factor

long standing lack of b12 leads to

maturation failure

maturation failure known as

pernicious anemia

another thing necessary for DNA synthesis and RBC maturation

folic acid

folic acid anemia is a type of

maturation failure anemia

hct measures

packed cell volume

hct is normally

3 x hgb level

look at what value only if hgb is low

mcv

mchc

mean corpuscular hgb concentration

mchc indicates

proportion of hgb occupied

mchc and mch measure

hgb color

normo/hypo/hyperchromic

normal/pale/bright color

rdw

red cell distribution width

rdw indicates

relative amount of abn cells

mpv

mean platelet volume

term for too many RBCs

polycythemia

conditions that can elevate RBC

high altitude, physcial training

polycythemia known as

PV or polycemia vera

PV results in

whole blood viscosity

causes of PV (6)

dehydration, tumors, cushing syndrome, ESRD, hypoxemia, long term dialysis

PV sns (5)

plethora, retinal and sublingual vein engorgement, splenomegaly, hepatomegaly, manifestations of vascular disease

plethora

engorged or distended blood vessels causing a ruddy color of the face, hands, feet, ears, and mucous membranes

retinal vein engorgement

blood shot eyes

manifestations of vascular disease (3)

angina, intermittent claudication, cerebral insufficiency

thrombocytopenia caused by (3)

accelerated plt destruction or consumption, defective plt production, disordered plt distribution

2 types of thrombocytopenia

idiopathic thrombocytopenia purpura (ITP), secondary thrombocytopenia

ITP is accelerated what of plt

destruction

ITP destruction caused by

body's own immune system

acute ITP is more common in

children

chronic ITP is in

adults

patho ITP - platelets become

coated with antibodies as result of autoimmune response

patho ITP - although plt function ____ the what sees them as what

function normally, the spleen sees them as foreign and destroys them

secondary thrombocytopenia

deficiency in plt production

secondary thrombocytopenia caused by (6)

medications, spices, infections, bone marrow disorders, chemo or radiation

medications causing thrombocytopenia (10)

thiazide, ASA, ibuprofen, NSAIDS, sulfonamides, tagamet, lasic, lanoxin, MS, heparin

spices causing thrombocytopenia (5)

ginger, cumin, turmeric, cloves, garlic

thrombocytopenia sns (8)

signs of hemorrhage, petechaie, purpura, epistaxis, menorrhagia, hematuria, GI bleed, activity intolerance

thrombocytopenia GI bleed (3)

cough is bright red blood, bleed in middle intestine tract is dark or black from bile, bleed in rectum is bright red

anemia is not a dx bu a reflection of an

underlying pathophysiologic alteration

clinical manifestations of anemia depend on (5)

rate anemia develops, age, activity level, underlying disease state, severity of anemia

sudden blood loss (30% or more) results in

symptoms of hypoxemia

hypoxemia symptoms (5)

listlessness, diaphoresis, tachycardia, SOB, rapid progression to circulatory collapse or shock

what type of response to hypoxemia

SNS

symptom if anemia develops slowly

fatigue is main complaint

3 ways body adapts to slowly developed anemia

1) increasing cardiac output, resp rate, O2 to tissues 2) increasing release of O2 by hgb 3) redistributing blood flow to vital organs

one of most common signs of anemia

pallor

what is not a reliable index of anemia

skin color

where to look for color with anemia (3)

nail beds, palms, mucous membranes

4 other sns of anemia

tachycardia, angina, dyspnea/SOB/fatigue, headache/dizziness/ringing in ears

anemia angina from

myocardial ischemia

dyspnea/SOB/fatigue with anemia from

decreased oxygen delivery

headache/dizziness/ear ringing with anemia from

decreased O2 to CNS

2 ways to classify anemia

morphology of red blood cell, etiology

normocytic, normochromic anemia

low H&H, norm MC and MCHC

macrocytic normochromic anemia

large normal color, low H&H, norm MCV and MCHC

microcytic hypochromic anemia

small pale, low H&H, low MCV and MCHC

normocytic normochromic anemia from (2)

acute blood loss, drug induced aplastic anemia

macrocytic normochromic anemia results from

interrupted synthesis of DNA, pernicious anemia

interrupted synthesis of DNA in states of

deficiency of B12 or folic acid

4 etiology of anemia

blood loss, nutritional, hemolytic, bone marrow debression

nutritional etiology of anemia

iron deficiency, B12, folic acid

hemolytic etiology of anemia

sickle cell, thalassemia, acquired hemolytic

bone marrow depression etiology of anemia

aplastic anemia