OraQuick HIV and HCV Rapid Test Kit Proficiency Training.
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Transcript of OraQuick HIV and HCV Rapid Test Kit Proficiency Training.
OraQuick HIV and HCV Rapid Test Kit Proficiency Training
Overview
Background Presentation
Demo of the basic OraQuick rapid test
You will practice running 2 tests, 1 HIV and 1 HCV We will not be testing anyone in the room
Proficiency Test - You will run 3 of each test without assistance Run, read, and document 6 tests Read results of 10 test images Pass / fail course, must get 100% to pass
What Do You Know About Rapid Tests?
Introduction to the OraQuick Rapid Tests
One-step test Visual interpretation Uses blood HIV test can also use oral fluid Looks for HIV or HCV antibodies Results in 20 to 40 minutes
Who can run tests?
California Health and Safety Code Section 120917 allows non-medical personnel that have been trained as HIV test counselors to perform CLIA-waived HCV tests if they:
(Next Slide)
(continue……..) 1. Have been trained in HIV test counseling by OA or
its agents;
2. Work in a HIV testing site that is funded by OA or that uses staff trained by OA or its agents and has a QA plan approved by the local health department and has HIV testing staff that complies with state regulatory QA requirements.
3. Have been trained by OA or its agents in both HIV
and HCV test kit proficiency for finger-stick blood tests and in universal infection control precautions, consistent with best infection control practices.
Package Insert
CLIA requires following the manufacturer’s instructions to the letter!!
Contains instructions
HIV Subject Information Brochure
Contains information about the test that is relevant to the client
Package Insert says, “All subjects must receive the Subject Information Brochure”
Check in with your site to see how this is handled
No brochure for HCV test
Test Accuracy
We’re going to talk about how well the tests work
You do not need to memorize what I’m saying
- only need to know test is very accurate
There are two components of test accuracy: Sensitivity Specificity
Specificity
When a test finds something, it should be the right thing
Tests ability to detect a true negative
HIV SpecificityTest True Neg Tested Neg False Pos Specificity
EIA 1 467 442 25 94.7%
EIA RR 467 463 4 99.1%
OraQuick I 464 463 1 99.8%
OraQuick RR 464 463 1 99.8%
More specific than standard HIV test (EIA) Test is very accurate (but not perfect) Screening test is designed to be very sensitive. Due to this design, we sacrifice a little specificity. Must confirm preliminary positives (SOC, false+)
Draw blood and send to lab (conventional oral test is back up)
HCV Specificity
Total tests OraQuick negative
True negative
Difference % Specificity
1660 923 937 14 98.5
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
HIV Sensitivity
Rapid test is at least as sensitive as conventional HIV test (EIA) Same window period
RR = repeatedly reactive
Test True Pos Tested Pos False Neg Sensitivity
EIA 1 340 340 0 100%
EIA RR 340 340 0 100%
OraQuick 1 340 340 0 100%
OraQuick RR 340 340 0 100%
HCV Sensitivity
Total tests OraQuick reactive
True positive
Difference % Specificity
1660 708 723 15 97.9
The test’s ability to detect true positives and not miss anything
HCV test
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 Two Tests are Highly Sensitive…
We do not need to confirm negatives
For both HIV and HCV, additional testing always needs to be done if a reaction is detected
Stat-Pak1st 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
_
Testing Process for HIV
+ +
_ +
OraQuick Test
Negative Reactive
Client referred to follow-upHCV nucleic acid testing
Testing Process for HCV
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 flashlight
Steady hand
Adequate lighting
External Controls
Fluids made from human plasma Biohazards – wear gloves! 3 HIV controls - Negative, Positive for HIV-1,
Positive for HIV-2 2 HCV controls – Negative, Positive Store controls at 35 to 46 degrees F Expire 56 days after opening
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
When to Run External Controls
New operator
New setting or conditions changed significantly
New test kit lot or shipment
Out of range testing area or storage area temperature
Two invalid results in a row
Every 40 tests or once a month (whichever comes first) Why?
Perform test,
59-99 degrees
If testing temperature is out of required
temperature range stop testing
If out of temp range, run controls before proceeding
Store test: HIV – 35 to 80 degrees
HCV – 36 to 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, and….
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 loops 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 list)
Rapid testing log or lab slip
Lab stickers
HIV/HCV Testing Form
Always use blue or black ink only!
Test Device
Control line
Test line
Flat pad
Paddle must be inserted into the vial no later than 60 minutes after sample has been introduced
Vent holes – Do NOT obstruct
Trainers Demo
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 doDo all steps in orderIf you finish a step quickly, wait for the
next step
Reading Time Results in 20-40 minutes
If a reactive result appears before 20 minutes have passed, the result may still not be read until at least 20 minutes have passed
OraQuick Test Results
Two lines: “C” - Control line “T” - Test line
Negative result
Reactive result
Invalid result
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 lines mean?
NOTHING
C
T
C
T
C
T
C
T
C
T
C
T
C
T
C
T
A B C D
E F G H
Participants’ Second Practice
Pair up One person run a test at their own pace,
using the short checklist Partner 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 “C” Line
The control line is the “C” line Internal control tells us:
Specimen was adequately applied Proper hydration Migration of reagents past the “T” zone.
Internal & external controls are standard lab practice – not a sign of test kit unreliability
Test Line The “T” Line
The “T” line is the “test line”. It works with the external control fluids to:
tell us if the result is reactive or non-reactive.
tell us if the reader can see lines.
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 & the external controls both tell us the test kit is working, why do we need both?
Because they tell us something different!“C” line tells us test kit is working properly“T” line tells us the test kit can detect HIV or
HCV 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”Light control line verifies lighting is OKVerifies test kit detecting small amount of antibodyDarkness of line 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
Think about the picture with the pink background – if you have a light line would you be able to see it on this test?
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….
OraQuick Test Proficiency:
Follow the checklist!!!!
This is not a test of memorization
Run 3 HIV and 3 HCV tests using different vials
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
Words of Caution