use of clinical labatory Flashcards
Lab Work Flow
Pre-analytical process
analytical process
post-analytical process
Preanalytical
Ordering, collection, transport
Analytical
Processing and testing
*Quality control
Postanalytical
Creating and sending reports
when are most lab errors/
pre and post analytical
which phase is tighty contorlled within the lab
analytical
uneccesary lab test
dont know
cuz patient ask
protect self from lawsuit
valid reason for ordering lab test
diagnosis
monitring disease
determine prognosis
screening for disease
invalid reasoning for odering lab test
pressure, lawyers, preparing for rounds, personal profit
lab test for MI
tropinin
CK
why use serum enzymes
for MI test
CK present in
heart, brian , muscles
—can elad to false positive tests
sensitivity of CK is
98%
what is a normal sd
results within 2 SD
-means 5% will be abnormal
variables influencing normal
physiologic
analytical
impact of multuple test
one will be outside of the reference range
panel testing
ability to order multiple test together
crticial values
lab test which are life-threatening (panic values)
real world, bell curve doesnt overlap
100% sensitivity
90% specifici
some false +
no false -
greater sensiviiy means
less specificity
greater specificity means
less sensitivity
should we screen for Mi with serum Ck
no, poor predictive value
