Blood Flashcards
blood functions
O2/nutrient transport
clots
cells/antibodies to fight infection
brings waste to kidneys
supports water/electroly balance (pH mx)
regulated body temp/hormone circ
blood components
plasma - 55%
platelets
WBC
RBC - 44%
plasma function
coagulation
defense
mx of osmotic pressure
nutriction
acid/base regulation
normal osmotic pressure
25 mmHg
platelet function
hemostasis regulation
infmalattory process
RBC function
O2 delivery
CO2 removate
left shift curve
incr O2 affinity / decr perfusion
decr pCO2
decr H+
decr 2,3 DPG
decr temp
HbF
right shift curve
decr O2 affinity/incr perfusion
incr pCO2
incr H+
incr 2,3 DPG
incr temp
normal P50
26 mmHg
methemoglobinemia
iron is oxidize from Fe2+ to Fe 3+
“functional” anemia
unable to deliver O2 to tissue adquately
dyspnea or cyanosis
85% SpO2
methemoglobinemia curve shift
left shift
meth treatment
MB (1-2 mg/kg)
carboyhemoglobinemia
CO is bound to Hg instead of O2
normal SpO2
cherry red skin
carboxyhemogloin treatment
supplement O2
hyperbaric chamber
sickle cell anemia
substitution on beta subunit
hypoxia
autosomal recessive
hemolytic anemia
what to avoid in sickle cell pts
dehydration
acidosis
hypothermia
tourniquets
when do WBC increase
infections
inflammation
cancer
when do WBC decrease
meds
autoimmune
Hg/Hct increase
smoking
genetic polycythemia
altitude
Hg/Hct decrease
hemodilition
blood loss
low Fe/B12/folate
inherited blood condition
kidney disease
cancer
Plt increase
increased production
Plt decrease
low production
rapid destruction
primary hemostasis
plt activation/adhesion
primary hemostasis is promoted by
vWF
extrinsic patheay
response to external trauma
what is activated in extrinsic
Factor VII –> Factor X
intrinsic pathway
response to internal damage to endothelium
what is activated in intrinsic
Factor XII + Facot XI + Factor IX —> Factor X
vWF stabilized Factor VIII —> Factor X
common pathway
Factor I, II, V, X, XIII
Hgb lab values
12-17.5
Hct
34-52
Plt
150-450
WBC
4.5-11
PT
10-13
PTT
25-35
INR
0.8-1.2
PT/INR measures
extrinsic
PTT measures
intrinsic
ACT
time it takes for whole blood to clot in tube
normal ACT
70-120 seconds
unable to clot (hypocoagulable)
hemophilia
von willibrands
hpocoagulable values
thrombocytopenia
hypothermia
acidosis
anemia
what causes thrombocytopenia
drugs (heparin/NSAIDs)
alcohol
liver failure/cirrhosis
DIC
innapropriate acitivation of clotting cascade
uses up coags