Flashcards
Vascular II - Test Validation
Cards in this deck (30)
- 1Quality Assurance (QA): • To assure that a lab/sonographer is providing ___ ____ • Compared the ___-___ test results to a reference test/modality that is considered the ___ ___• Correct information
• Gold standard - 2Quality Assurance (QA): • This comparison helps identify any weaknesses on the part of the ____, ___, and/or ___ ___• Examination ; sonographer ; interpreting physician
- 3Quality Assurance (QA): • The goal is to have ___% correlation with the gold standard • A good rating is to have at least ___% of your non-invasive tests correlate with the gold standard• 100%
• 90% - 4Quality Assurance (QA): • There are ___ measures used to compare information ---> ____ ---> ___ ---> ___ ___ ___ ---> ___ ____ ___ ---> ____• 5
---> Sensitivity
---> Specificity
---> Positive predictive value
---> Negative predictive value
---> Accuracy - 5"True Positive" (TP): • Means that ___ the non-invasive and the gold standard found disease (or had an abnormal result) • Both agree that the test is ___• BOTH
• Positive - 6"False Positive" (FP): • Means that the non-invasive result was ___, but the gold standard was ___ • The non-invasive test is ___ ___ • ___ on the result• Abnormal ; normal
• Falsely positive
• Diagree - 7"False Negative" (FN): • Means that the non-invasive exam was ___, but the gold standard found ___ • The non-invasive exam was ___ ___ • ___ on the result• Normal ; disease
• Falsely negative
• Disagree - 8"True Negative" (TN): • Means that the non-invasive and the gold standard ___ on the absence of disease (normal) • Both agree that the test is ____• Agree
• Negative - 9Sensitivity: • The ability of a test to detect ___ • ___ ___• Disease
• Truly positive - 10Sensitivity Calculation: • The ___ ___ ___ non-invasive exams divided by the total number of ___ exams by the gold standard + ___ ___• Total true positive ; positive ; false negatives
- 11Specificity: • The ability of a test to identify ___ • ___ ___• Normality
• Truly Negative - 12Specificity Calculation: • The total number of ___ ___ non-invasive exams divided by the total number of ___ test results by the gold standard + ___ ___• True negative ; negative ; false positives
- 13Positive Predictive Value: • The ___ of non-invasive tests which accurately predict ____• Percentage ; abnormality
- 14Positive Predictive Value: • Of your ___ non-invasive exams, what PERCENTAGE correctly predict the disease as ____ by the gold standard (example: ICA stenosis %)• Positive ; confirmed
- 15Positive Predictive Value Calculation: • The number of ___ ___ non-invasive tests divided by the number of all the ___ non-invasive tests• True positive ; positive
- 16Negative Predictive Value: • The number of non-invasive tests which accurately predict ____• Normality
- 17Negative Predictive Value: • Of you ___ non-invasive exams, what PERCENTAGE accurately predicted the ____ of disease as confirmed by the gold standard• Negative ; absence
- 18Negative Predictive Value Calculation: • The number of ___ ___ non-invasive tests divided by the number of all of the ___ non-invasive exams• True negative ; negative
- 19Accuracy: • The ___ percentage of ___ non-invasive diagnoses (how well does your lab detect and rule-out disease?)• Overall ; correct
- 20Accuracy Calculation: • The total number of ___ non-invasive tests divided by the ___ number of non-invasive tests performed• Correct ; total
- 21Accuracy Misc.: • The value for accuracy will fall between those for ___ and ___ and between the ___ and ___ predictive values• Sensitivity ; specificity ; positive ; negative
- 22Statistical Correlation: • Comparing the ___-___ results and the ___ ___ results • The 2x2 box configuration that allows you to calculate the statistics is called the ___ ___• Non-invasive ; gold standard
• Chi Square - 23Chi Square: • Each box can be described as above or the letters can be used ( __, __, __, __ )• A ; B ; C ; D
- 24Chi Square Misc.: • There may be a ___ in front of the positive and negative predictive values. This stands for "___" and is abbreviated as GPPV or GNPV• G ; "group"
- 25Lab Accreditation: • The main accrediting body for vascular labs is the ___ (___) • The ___ ___ for the ___ of ___ ___ is a nonprofit organization• ICAVL (IAC)
• The Intersocietal Commission for the Accreditation of Vascular Laboratories - 26Lab Accreditation: • The purpose of the ICAVL is to provide a ___ for accreditation of facilities, which perform comprehensive testing for vascular disease with ___-___ testing modalities• Mechanism ; non-invasive
- 27Lab Accreditation: • Accreditation signifies that a facility has been reviewed by an ___ ___, which recognized the ___ for quality testing for the diagnosis of vascular disease• Independent agency ; commitment
- 28Lab Accreditation: • At this point in time participation in the accreditation process is ___• Voluntary
- 29Lab Accreditation The ICAVL offers accreditation in the following areas: • ___ ___ • ___ ___ • ___ ___ • ___ ___ • ___ ___• Extracranial cerebrovascular
• Intracranial cerebrovascular
• Peripheral arterial
• Peripheral venous
• Visceral Vascular - 30—
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- Sonography (Vascular II) Flashcards on Vascular II - Test Validation , created by Adriana Long on 21/10/2019.
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- Adriana Long
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