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34 Cards in this Set
- Front
- Back
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APPROPRIATE uses of lab tests
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Basic screening, Establish a diagnosis, Management of dis, D/Dx
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INappropriate uses of lab tests
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Because the pt asks for it, The more info the better
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Types of Analysis "commonly done"
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Blood, Sputum, Urine, Feces, Exudates, CSF, Synovial Fluid, Tissues
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Some "other" tests
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X-Ray, CT, MRI, Ultrasound, Nuc Med, DNA test of (hair, blood, semen)
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Critical/Panic Value
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A lab value reflects a "possible" emergency & needs immediate attention.
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Specificity
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Correctly identifies pts" without" dis
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Sensitivity
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Correctly identifies pts "with" dis
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True Positive test
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Correctly identifies the "presence" of a given dis
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True Negative test
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Correctly identifies the "absence" of a given dis
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False Positive test
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Incorrectly identifies the presence of a given dis
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False Negative test
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Incorrectly identifies the absence of a given dis
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Conditions Affecting "Testing Process"
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Culture, Language, Physical Impairment, Alt mental status
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Pt Factors Affecting "Test Results"
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Incorrect Diet, Current Drug Therapy, Time of day, Pregnancy, Age/Sex, Plasma Vol
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Critical Value for Calcium (Ca)
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<=6.5 or >=13 mg/dl
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Critical Value for Creatinine
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>=5 mg/dl
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Critical Value for Glucose
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<=50 or >=450 mg/dl
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Critical Value for Sodium (Na)
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<=120 or >=160 mmol/L
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Critical Value for Potassium (K)
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<=2.8 or >=6 mmol/L
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Critical Value for Lactic Acid
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>=5 mmol/L
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Critical Value for WBC's
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<2.5 or >50
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Critical Value for Hemoglobin (Hb)
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<8 or >20
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Critical Value for Hematocrit (HCT)
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<25 or >60
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Critical Value for Platelets
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<50 or >1000
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Critical Value for Prothrombin Time(PT)
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>24
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Critical value for Int'l Ratio (INR)
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>4
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Yellow- Top
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Blood Cultures
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Red/Gold
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Serum-Chemistry
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Light Blue
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Plasma Coagulation
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Tan/Brown
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Lead Levels
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Lavender
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Hematology & CBC
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Royal Blue
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Toxicology
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Gray
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Glucose & Alcohol
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Black
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Westergren Sedimentation Rate
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Green
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ABG, Special tests like Ammonia, Hormones & Electrolytes
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