Monica777

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Author:
Anonymous
ID:
47712
Filename:
Monica777
Updated:
2010-11-06 16:43:34
Tags:
chemistry
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Description:
quality control test
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  1. what 4 things does an accurate chemical analysis depend on
    proper collection, perservation, processing, method of anlysis ( all are equally inportant)
  2. what is the idea time for lab measurements to be performed
    within 1 hr or you must perserve the sample
  3. why are specimens preserved
    • 1. so the substance wont be altered
    • 2. speciment collected in a timely sequience should be stored ntil they can be analysed at the same time
    • 3. so the samples retained long enough to repeat if necessary
  4. what sample is most often used for chemical analysis
    serum
  5. what is the differance between serum and plasma
    • 1. serum is liquid portion with fibergins and clotting factors removed
    • 2. plasma is liquid portion of the circulating blood and it contains fibergins and clotting factors
  6. what vacutainer is used to collect serum and why
    gold top or red, the tubes have no anticolagent in the tube
  7. how is a
  8. how is a gold top tube processed
    • 1. inverted 5 times- do not remove stopper, or centerfuge after drawing
    • 2. allow to clot upright- atleast 15 mins. no more than 60 min.
    • 3. centerfuge at least 15 min. within 1 hr. of collection
    • 4. transfer to a labeled plastic screw cap vial
    • 5. cool or freeze
  9. what are the precautions when handing blood
    • 1. gloves
    • 2. open stopper away from you
    • 3. disinfect blood spills immediatly with 10% bleach or disinfectant
    • 4. discard tubs and sharps in container
  10. hemolyzed serum
    a clear red color to the serum or plasma
  11. icteric or (hyperbilirubinemia, jundice)
    brownish yellow, patient may have jaundice or hepetisis
  12. lipemic
    is milky white (serum or plasma)
  13. accuracy
    the true or actual size
  14. percision
    repeat ability
  15. normal value
    average results of healthy indivuals
  16. standard
    calibrator used to set machine value
  17. control
    check accuracy, must fall within a acceptable range befor patient valur report
  18. duplicate determination
    one of the specimens in the batch is measured twice and it check precision
  19. proficiency survey
    speciments are sent to the lab, you analize sample and send the results. the agency will let you know how you did
  20. what does a quality control program include
    • 1. standards or calibrators
    • 2. controls
    • 3. duplicates
    • 4. profenecy service
  21. what 4 things does the control check for
    • 1. machine or instrument
    • 2. reagents, strips, test cards, and starting manual
    • 3. operator
    • 4. environment tempture and humidity
  22. what steps should follow if a control fall outside of the acceptable range
    • 1. document it ( in lab book)
    • 2. check everything
    • 3. retest the same control vial
    • 4. retest new vial
    • 5. recalerbrate the machine
    • 6. call customer service
  23. what is great about fasting
    • reflects metabolic base line
    • avoids lipema

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