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Types of Errors
30問 • 5ヶ月前
  • Almira Coleen
    • 通報

    問題一覧

  • 1

    Types of Errors:

    Random Error , Systematic Error , Clerical Error

  • 2

    Due to chance – unpredictable, indeterminate

    Random Error

  • 3

    Varies from sample to sample

    Random Error

  • 4

    Basis for differences between repeated measurements

    Random Error

  • 5

    Random Error:

    Due to chance – unpredictable, indeterminate, Varies from sample to sample, Basis for differences between repeated measurements

  • 6

    Random Error Causes:

    Instrument, operator, environmental conditions, temp fluctuations, techniques (pipetting, mislabeling, mixing of samples and reagents)

  • 7

    Constant difference in one direction

    Systematic Error

  • 8

    Example of Random Errors:

    Dirty optics, fluctuating light source

  • 9

    Detected as either + or – bias

    Systematic Error

  • 10

    Measure the agreement bet measured quantity and true value

    Systematic Error

  • 11

    Systematic Error:

    Constant difference in one direction, Detected as either + or – bias, Measure the agreement bet measured quantity and true value

  • 12

    Systematic Error Causes:

    Calibration problems, reagent & QC materials deterioration, improperly made standard solutions, contaminated solutions, unstable/inadequate blanks, leaky and failing instrument, poorly written SOP

  • 13

    Systematic Errors:

    Constant Error , Proportional/Slope/Percent Error

  • 14

    Exists when there is continual difference between the comparative method and test method independent of sample concentration

    Constant Error

  • 15

    Exists when difference between test method and comparative method values is proportional to analyte concentration

    Proportional/Slope/Percent Error

  • 16

    Constant Error

    Exists when there is continual difference between the comparative method and test method independent of sample concentration

  • 17

    Proportional/Slope/Percent Error

    Exists when difference between test method and comparative method values is proportional to analyte concentration

  • 18

    Highest frequency

    Clerical Error

  • 19

    Clerical Error Examples:

    Handwritten Labels, Request Forms

  • 20

    Based on quantity of error that will negatively affect clinical decisions

    Allowable Error

  • 21

    Clerical Error

    Highest frequency , E.g. handwritten labels, request forms

  • 22

    Allowable Error: Formula

    Acceptable = ET (Random + Systematic [Proportional + Constant] < Ea

  • 23

    Pre-analytical Errors

    Improper Patient Preparation, Mislabeled specimen , Incorrect Order of Draw, Incorrect Patient Identification, Wrong specimen Container, Incorrect Blood: Anticoagulant ratio, Improper mixing of sample and additives, Incorrect specimen preservation, Mishandled specimen – transport & storage, Missed or incorrectly interpreted lab requisition

  • 24

    Post-Analytical Errors

    Unavailable or delayed results – STAT and routine, Incomplete lab results , Wrong transcription of patient’s data and lab results

  • 25

    Indicators of Analytic Performance

    Internal QC, Proficiency testing, Accreditation, QA assurance monitoring and laboratory utilization and automation

  • 26

    Precision Study

    First step in method evaluation, Detect random errors, 2 control solutions - run twice a day in 10-20 day period

  • 27

    First step in method evaluation

    Precision Study

  • 28

    most error-free means of lab requisition

    Online computer

  • 29

    Precision Study: 2 control solutions - run twice a day in ____________

    10-20 day period

  • 30

    Detect random errors

    Precision Study

    • STATISTIC 1

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    BIOSTAT

    BIOSTAT

    ユーザ名非公開 · 23問 · 1年前

    BIOSTAT

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    23問 • 1年前
    ユーザ名非公開

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    41問 • 1年前
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    問題一覧

  • 1

    Types of Errors:

    Random Error , Systematic Error , Clerical Error

  • 2

    Due to chance – unpredictable, indeterminate

    Random Error

  • 3

    Varies from sample to sample

    Random Error

  • 4

    Basis for differences between repeated measurements

    Random Error

  • 5

    Random Error:

    Due to chance – unpredictable, indeterminate, Varies from sample to sample, Basis for differences between repeated measurements

  • 6

    Random Error Causes:

    Instrument, operator, environmental conditions, temp fluctuations, techniques (pipetting, mislabeling, mixing of samples and reagents)

  • 7

    Constant difference in one direction

    Systematic Error

  • 8

    Example of Random Errors:

    Dirty optics, fluctuating light source

  • 9

    Detected as either + or – bias

    Systematic Error

  • 10

    Measure the agreement bet measured quantity and true value

    Systematic Error

  • 11

    Systematic Error:

    Constant difference in one direction, Detected as either + or – bias, Measure the agreement bet measured quantity and true value

  • 12

    Systematic Error Causes:

    Calibration problems, reagent & QC materials deterioration, improperly made standard solutions, contaminated solutions, unstable/inadequate blanks, leaky and failing instrument, poorly written SOP

  • 13

    Systematic Errors:

    Constant Error , Proportional/Slope/Percent Error

  • 14

    Exists when there is continual difference between the comparative method and test method independent of sample concentration

    Constant Error

  • 15

    Exists when difference between test method and comparative method values is proportional to analyte concentration

    Proportional/Slope/Percent Error

  • 16

    Constant Error

    Exists when there is continual difference between the comparative method and test method independent of sample concentration

  • 17

    Proportional/Slope/Percent Error

    Exists when difference between test method and comparative method values is proportional to analyte concentration

  • 18

    Highest frequency

    Clerical Error

  • 19

    Clerical Error Examples:

    Handwritten Labels, Request Forms

  • 20

    Based on quantity of error that will negatively affect clinical decisions

    Allowable Error

  • 21

    Clerical Error

    Highest frequency , E.g. handwritten labels, request forms

  • 22

    Allowable Error: Formula

    Acceptable = ET (Random + Systematic [Proportional + Constant] < Ea

  • 23

    Pre-analytical Errors

    Improper Patient Preparation, Mislabeled specimen , Incorrect Order of Draw, Incorrect Patient Identification, Wrong specimen Container, Incorrect Blood: Anticoagulant ratio, Improper mixing of sample and additives, Incorrect specimen preservation, Mishandled specimen – transport & storage, Missed or incorrectly interpreted lab requisition

  • 24

    Post-Analytical Errors

    Unavailable or delayed results – STAT and routine, Incomplete lab results , Wrong transcription of patient’s data and lab results

  • 25

    Indicators of Analytic Performance

    Internal QC, Proficiency testing, Accreditation, QA assurance monitoring and laboratory utilization and automation

  • 26

    Precision Study

    First step in method evaluation, Detect random errors, 2 control solutions - run twice a day in 10-20 day period

  • 27

    First step in method evaluation

    Precision Study

  • 28

    most error-free means of lab requisition

    Online computer

  • 29

    Precision Study: 2 control solutions - run twice a day in ____________

    10-20 day period

  • 30

    Detect random errors

    Precision Study