Upload
cai
View
394
Download
2
Tags:
Embed Size (px)
DESCRIPTION
INSTI HIV 1 Rapid Test How To Run and Read. Overview. Background Presentation D emo of the test You will practice running 2 tests We will not be testing anyone in the room Proficiency Test - You will run 5 tests without assistance R un, read, and document 5 tests - PowerPoint PPT Presentation
Citation preview
INSTI HIV 1 Rapid TestHow To Run and Read
Overview Background Presentation
Demo of the test
You will practice running 2 testsWe will not be testing anyone in the room
Proficiency Test - You will run 5 tests without assistanceRun, read, and document 5 testsRead results of 12 test images (?)Pass / fail course, must get 100% to pass
What do you know about rapid HIV tests?
Intro to INSTI Rapid Test
Screening test Visual interpretation Looks for HIV antibodies Uses blood Results in 1 minute
In California…. Individuals who have been trained by CDPH/OA and are
working in a OA-funded HIV testing site can run HIV/Hep C rapid tests
OR
Are working in an HIV testing site that meets these two criteria: Utilizes HIV counseling staff who are trained by OA or its agents and Has a quality assurance plan (QA) approved by the local health
department in the jurisdiction where the site is located and has HIV testing staff who comply with specific QA requirements.*
They must also be certified to perform finger sticks (or be occupationally exempt, like nurses)
* QA requirements are specified in Section 1230 of Title 17 of the California Code of Regulations
Package Insert
CLIA requires following the manufacturer’s instructions to the letter!!
Contains instructions
Subject Information Notice Contains information
about the test that is relevant to the client
Package Insert says, “All subjects must receive the Subject Information Notice”
Check in with your site to see how this is handled
Test Accuracy
We’re going to talk about how well the test works
You do not need to memorize the details- only need to know test is very accurate
There are two components of test accuracy:SensitivitySpecificity
Specificity
When a test finds something, it should be the right thing
Tests ability to detect a true negative
SpecificityTotal True
negativesINSTI
negativesDifference % Specific
1408 1382 1375 7 99.5%
Not exact, but very accurate
Sensitivity
The ability of a test to find what it’s looking for and not miss anything.
Test’s ability to detect a true positive
SensitivityTotal Confirmed
positivesINSTI
reactivesDifference % Specific
3507 820 817 3 99.6
INSTI test
The test’s ability to detect true positives and not miss anything
Combining Specificity and Sensitivity
An ideal test would find the right thing (specificity)
and not miss anything (sensitivity)
A net that gets all the tuna and none of the dolphins
Think of a Tuna net….
Because the Test is Highly Sensitive…
We do not need to confirm negatives
We do, however, always need to confirm reactive and preliminary positives
INSTI1st Test
Negative, please come back
and see us in 6 months
Lab Testing
OraQuick Test Reactive, 2nd Test
Both tests were reactive your next step is to see a doctor and we can
help you with that
_
2 Different Tests
+ +
_ +
With Clients…
Emphasize that the test is extremely accurate
De-emphasize statistics and percentages
For example “This test is highly accurate”
Quality Assurance Requirements
QA are practices and procedures which ensure that every client receives an accurate test result
QA reduces human error as much as possible
Components of Quality Assurance
Personal and logistical characteristics
External controls
Lab space
Universal precautions
Must Have… Good eye sight
Organizational skills
Full/bright light, task light Do not use a flash light
Steady hand
Adequate lighting
External Controls Fluids made from
inactivated human plasma
Biohazards – wear gloves!
Negative, Positive for HIV-1
External Controls are Used for:
Training, we will use them today
Determining if test is working properly
Determining if lighting is adequate
Determining if the test reader has sufficient eye site
HIV-1 vs HIV-2 Two different strains
Both are transmitted the same way
HIV-2 is less infectious
HIV-2 progresses more slowly
HIV-2 found in West Africa and is rarely found elsewhere
HIV-1 vs HIV-2 Two different strains
Both are transmitted the same way
HIV-2 is less infectious
HIV-2 progresses more slowly
HIV-2 found in West Africa and is rarely found elsewhere
When to Run External Controls
New operator
New test kit lot or shipment
Two invalid results in a row
Out of temperature range in testing area or in storage area
Every 40 tests or once a month (whichever comes first)
Perform test, 59 to 86 degrees
If testing temperature is out of required temperature range stop testing
If out of temp range, run controls before proceeding
Store test: 59-86 degrees
Temperature Control
Lab Space
A space for undisturbed test processing
Your site is a lab Separate from counseling area No smoking, eating or drinking
Universal Precautions
The universal practice of avoiding contact with patients' bodily fluids, (blood) by means of the wearing of nonporous articles such as
medical gloves
Gloves Wear them when handling blood or blood
products
TODAY – whenever you touch the control fluid vials!!!!
How often do you change them?
How do you remove them?
Sharps: Handling & Disposal Medical instruments that are used to
puncture the skin (syringes, lancets, needles)
Dispose of sharps immediately, in a hard red plastic bio bin!
Do NOT dispose of sharps in a red bio hazard bag
Biohazard Bags Handling & Disposal Bandages, used cotton and
gauze, and gloves with body fluids on them are bio hazardous waste
By law, if fluid cannot be squeezed out of the cotton, gauze, etc., the waste item can be disposed of in regular trash.
For Today’s Training Place pipettes and
used test kits in the sharps container
Place gloves and all other trash in the brown paper bag
Paperwork Needed
Expanded Checklist Short Checklist (Competency
Assessment Test) Rapid testing log or lab slip Lab stickers HIV Testing Form
Always use blue or black ink only!
Basic Materials
3 solutions
Test device
Pipette and lancet
Package insert
The Test Device
Control spot
Test spot
THIS TAB DOWN
How to Run INSTI Controls1. Bring controls to room temperature2. Mix controls by swirling3. Collect 50ul (microliters) in clean pipette4. Transfer control sample to Sample Diluent bottle (#1- a diluting
agent)5. Mix by inversion6. Pour into center of membrane within 5 minutes (absorbs in 30
seconds)7. Mix Color Developer (#2) by inverting8. Check that Color Developer suspension is thoroughly mixed9. Pour Color Developer into center of membrane (absorbs in 20
seconds)10. Add Clarifying Solution (#3) to center of membrane, read result
immediately while membrane is still wet11. Do not read if 5 minutes have passed after adding Clarifying Solution
Why INSTI is a 1-Minute Test
30 seconds for the first step
20 seconds for the second step
10 seconds or less for the third step
Trainers Demonstrate Trainer Reads Other Trainer preforms test Participants follow along
(Expanded Checklist)
Participants’ First Practice
No food or drink
Listen to detailed steps: Only do what we tell you to doThe time it takes between introducing
the fluids is importantDo all steps in orderIf you finish step a quickly, wait for the
next step, unless time-sensitive
Negative Result
After Clarifying Solution (#3) has been absorbed,
control spot is shaded, test spot
is not
Light or dark, still negative
THIS TAB DOWN THIS TAB DOWN
THIS TAB DOWN
Negative Result
Rarely a faint ring will appear around the test spot. This is still a negative result.
THIS TAB DOWN
Reactive Result After Clarifying
Solution (#3) has been absorbed, control spot is shaded, test spot is also shaded
Test spot must be completely shaded, light or dark
Indeterminate Result After Clarifying Solution (#3) has been absorbed:
control area is not shaded
THIS TAB DOWN THIS TAB DOWN THIS TAB DOWN THIS TAB DOWN
membrane displays “uniform tint” or “blue specks”
What causes invalids?
Human error (e.g., no specimen) Unknown Manufacturer error
If you ever have an unusual result, do not deliver it
What does it mean if a client has an invalid test result?
What does the darkness of the spots mean?
NOTHING
Results (change to INSTI)
Participants’ Second Practice
Pair upOne person run a test at their own pace, using
the short checklistPartner observe them and help only as needed
(e.g., if you see any steps that were missed, say something)
Switch
Use the checklist!!!!
Internal Control – the Control Spot
Internal control tells us: Specimen was adequately applied Proper absorption of solutions
Internal & external controls are standard lab practice – not a sign of test kit unreliability
Test Spot
It works with the external control fluids to:
tell us if the result is reactive or non-reactive
tell us if reader can see spots
tell us if there is proper lighting
tell us if the reader’s eyesight is adequate to run the test
Controls Work Together
If the internal control (control spot) & the external controls (control fluids) both tell us the test kit is working, why do we need both?
Because they tell us something different!The Control Spot tells us test kit is working
properlyThe Test Spot tells us the test kit can detect
HIV antibodies when they’re present
Results of Practice Test
Did you get the correct result?
Any questions?
The control fluid that we use provides a “challenge sample”A light test spot verifies lighting is OKVerifies test kit detecting small amount of antibodyDarkness of test spot NOT related to viral load,
disease progression, or anything else about the client
If a Client Asks to See the Test Kit, What Would You Do?
Say “No” – Why?
Could compromise confidentiality
Only trained personnel may read the test
Test is disposed of in biohazard bag as soon as it’s read
How Do You Correct a Written Mistake?
7:22pm T.K. 12/15/2011 End time: 7:12pm
Use blue or black ink only on all forms
A single crossed-out line, corrected entry written clearly above, include date and initials of the individual making the change
At no time should an original entry be obliterated or otherwise made illegible by a change on the record
Any questions?Proficiency tests coming next….
Follow the checklist!!!! This is not a test of memorization
Run five tests using five different controls
Put your name on the top of your paper(s)
Take your time, double & triple checking your work
If you make a mistake on your paperwork and you catch it, you can fix it. and I catch it, you will have to come back another day
INSTI HIV Test Proficiency:Words of Caution
Additional Resources
The current package insert (including instructions for operation) for the BioLytical INSTI HIV1Rapid test
http://www.biolyticalus.com/instructions.html
The California Quality Assurance Guidelines are available on the Office of AIDS website at: http://www.cdph.ca.gov/aids