Exam 5- hematology-Cha 1 Flashcards
Blood Components
made up of x4
RBC
WBC
Platelets
Plasma
Rbc carry what x2 in body
carry hemoglobin and iron in the body
Hemolysis-
breakdown
recycling
converted
excreted
Breakdown of old and damaged RBC
Recycling of amino acids and iron
Converted into bilirubin
Excreted in bile
Diseases that increase hemolysis/ impair liver function
Leads to
Can lead to
Leads to increased bilirubin in the blood
Can lead to jaundice
White Blood Cells- Leukocytes
normal is
defesnes
originate where
Normal is 4,000-11,000
Defenses against microorganisms
Originate from stem cells in bone marrow
Leukocytosis=
Leuokpenia=
Leukocytosis= high wbc
Leuokpenia= low wbc
Neutrophils
what %
do what
- 60-70% of wbc-
first to respond to injury/ inflammation
Eosinophil’s
respond to
increased
- respond to parasites and allergies
increased numbers when those are involved
Basophils
respond to
contain
- respond to allergies
contain histamines
Monocytes
immature
- immature inflammatory immune response
Lymphocytes
immature
- immature inflammatory immune response
Segs
- mature neutrophiles
Bands
- immature neutrophils
WBC are increased with
x3
infection/ inflammation
auto immune disordes
leukoemia
Decreased wbc x2
prolonged infection
bone marrow suppression
platlets
formed where
production controlled by
made where
formed in bone marrow
production is controlled by thrombopoietin
made in spleen and can circulate for 7-10 days in body
platlets
produces x2
aggregate why
requires what to clot
produce ATP and remediators for clotting
aggregate in resonse to trauma
requires calcium to clot- platelets alone will not clot
Thrombocytosis
Thrombocytopenia
Thrombocytosis- large amount of platlet cells
Thrombocytopenia- decreased amount of platelet cells
Platelets-Normal 150,000-450,000
What affects platelet levels?
x3
High altitude
Increased exercise
Chronic Cold weather
Hemostasis-
control
interaction
control of bleeding-
interaction between platelets and clotting mechanisms
goal of hemostasis
goal is to maintain a steady blood flow, blood volume , and blood pressure despite injury
first stage-Vessel spasm
does what
Five Stages of Hemostasis
- contracts for 1 minute
second stage-Formation of platelet plug-
does what
Five Stages of Hemostasis
platelets attach to damaged vessels
third stage-Formation of insoluble fibrin clots
does what
Five Stages of Hemostasis
- mesh of clots
fourth stage-Clot retraction
happens when
what happens
Five Stages of Hemostasis
- happens in 30 minutes/
platelets pull the edge of damaged vessel together
fifth stage-Clot dissolution-
what happens
Five Stages of Hemostasis
after clot is formed, body starts to dissolve it to restore blood flow to area.
Amount of oxygen that gets to tissues depends on
availability
diffusing
number
amount
ability
Availability of oxygen in alveoli
Diffusing surface and capacity of lungs
Number of RBCs
Amount and type of (hemoglobin)Hbg
Ability of cardiovascular system to transport
Anemia
is what
every type of anemia decreases
leading to
abnormally low rbc count or reduced hemoglobin count
every type of anemia decreased-> oxygen carrying capacity,
leading to tissue hypoxia
S/S of anemia- If slowly- then body may be able to develop compensation mechanisms
what skin
what hr
a
f
h
d
what chages
what rr
what repository
what pain
Pale and cool skin
Tachycardia
Angina
Fatigue- due to ischemia/hypoxia
Headache
Dizziness
Vision changes
Tachypnea
Dyspnea
Bone pain- dt inc rbc production
S/S of long term anemia-
c
m
c f
Chf,
murmurs,
clubbed fingers
Chronic blood loss
happens from what
Anemia causes-
slow bleed from ulcers and cancer
Anemia- chronic blood loss
s/s are
minimal and during exercise or increased 02 consumption situations
Acute
caused by
Anemia causes-blood loss
caused by trauma-
Acute anemia s/s
what hr
what constricts
what contracts/releases
tachycardiac,
peripheral vessels will constrict,
liver will constrict and release a bolus of blood
Anemia can also be caused by
decreased
insufficient
decreased RBC production
insufficient or abnormal hemoglobin
Most common anemia is Iron deficiency anemia-
iron needed for what
body cant do what
iron is optimal for rbc formation
, body cannot synthesis hemolobin without iron
Hemolytic Anemia
characterized by
premature destruction/ hemolysis of blood cells
Hemolytic Anemia
s/s
f
j
i
- fatigue,
jaundice,
irritability
Hemolytic Anemia
Intrinsic-
Two types of causes
disorder of blood cells- sickle cell
Hemolytic Anemia
Extrinsic
Two types of causes
- outside of blood cells-
drugs, toxins, chemicals, trauma, and mechanical damage
heridtary->
usually//except
episodes happen where
Hemolytic Anemia- Sickle Cell
Hereditary- most common In black americans
Usually is asymptomatic unless stressed by hypoxia
Episodes happen where cells are crescent shaped- abnormal hemoglobin form in RBCs
Hemolytic Anemia- Sickle Cell
These patients are not always in a sickle cell crisis, but can be in one–s/s of sickling
p
f
j
i
- pallor,
fatigue,
jaundice,
irritability
If person with trait for sickle cell had kid with Someone who doesn’t have trait,
then child may have trait but not the disease
If 2 people with the sickle cell trait have kids-
25% of disease in their children
Sickle Cell Anemia Signs and symptoms-
p
f
j
i
pallor,
fatigue,
jaundice
, irritbility
Sickle Cell Crisis
will experience x2 what hallmark signs
sickle cells do what
causing
Will experience Severe pain/ fever-
sickle cells clump together and obstruct capillary blood flow causing ischemia and possible infarction
sickle cell crisis
what gets back to normal shape
repeated acts
pts need to gain oxygen levels and rbc need to get back to normal shape/
repeated acts will weaken RBCs
Sickle Cell Crisis triggers
s
I
excessive
h
low
low
d
stress,
infection,
excessive exercise,
hypoxia,
low environmental 02,
low body temperature
dehydration
sickle cell crisis s/s-
f
h
what pain//how long
what resp
fever
headache,
abdominal /extremity pain for 4-6 days.
SOB
What is damaged by sickle cell crisis
what does that do
Spleen and kidney damage
kidney damage will decrease Erythpoetnan release- will decrease rbc production
Treatment for Sickle Cell Crisis
what control
large
prevention
education
pain control-pca pump- morphine
Large amounts of fluids
Prevention of stress and infection
Education on vaccines
Meds
h
f a
what transplant
Treatment for Sickle Cell Crisis
- hydroxyurea decreased production of abnormal RBC
folic acid – assists with production of mature rbc
stem cell transplant- very expensive and could lead to death- only known cure for sickle cell crisis
Treatment for Sickle Cell Crisis
most infants
Most infants are tested for this so the parents know
Be aware of blood transfusions-
may have/causes
damages
what hmg for blood transfusion
Treatment for Sickle Cell Crisis
may have immune response that causes excess iron
which damages heart, liver and other organs
hmg under 7
what 2 labs in sickle cell
decreased HGB and rbc
pt may need what if they are getting blood transfusion
pt may need treatment for excess iron if they have transufion blood
Acquired Hemolytic Anemia
Caused by something outside of RBc-
mechanical
d
b
r
what disorders
I
what responses
what chemicals
mechanical trauma like heart valves,
dialysis,
burns,
radiation,
autoimmune disorders,
infections,
immune responses to blood transfusions
chemicals like drugs/ snake venom
Acquired Hemolytic Anemia-Signs and symptoms
enlarged
j
p
what hr
what else
- enlarged spleen,
jaundice,
pallor,
tachycardia,
bone fractures leading to long term bone deformities
Aplastic Anemia-Rare-
bone marrow does what
leading to
normal/replaceed
bone marrow fails to produce all 3 types of blood cells,
leading to pancytopenia// normal marrow is replaced with fat
aplastic anemia
50% caused by
other causes are:
what damage
what infecetion
what chemicals
50% of cause is unknown
Other cause is
stem cell damage from chemo,
viral infections like hep c
, chemicals like arsenic/ benzine
Aplastic Anemia
S+Sx-
f
p
w
h
d
I
bleeding where
e
what labs
Fatigue
Pallor
Weakness
Headahce
Dyspnea
infections
bleeding gums
eccymoisis( bruising)
low rbc, wbc and platelets
decreased wbc do what
decreased platelets leads to
aplastic anemia
Decreased wbc are lead to infections
Decreased platelets can lead to bleeding gums and ecchymosis