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I’ve been using the Innova LFTs for a few months. We have been advised to insert the swab 1.5 cm into each nostril only. No mention of a throat swab whatsoever.
Instructions here https://www.england.nhs.uk/coronavirus/wp-content/uploads/sites/52/2020/11/LFD_NHSStaff_A4_161120_.pdf
or google ‘ A guide for healthcare staff self-testing for coronavirus using a Lateral Flow Device (LFD)’
Cheers :)
Zero - the instructions for performing the test are actually identical in both instruction manuals i.e 2.5cm and 10 circles. The updated version is mainly different in the COVID guidance section. And notably the revised manual includes a "Test Performance" section that states the test is more likely to give a positive result if someone has high levels of virus and the need to immediately self isolate if positive (that section is missing from the earlier version).
Part of the PA Consulting brief was coming up with standardised instructions for use. You might find that Abakta tests end up with the same instructions. The govt aren’t shy in ignoring manufacturer instructions. I’ve included the word instructions a lot in this post. Instructions.
@Paul0410, I’d be interested to know what part of the instructions in the box were you advised to ignore?
Atb, zb
Can’t see any on the packaging or instructions, but they’ll probably be on the device, so I’ll find out tomorrow.
Also, regarding my earlier post, looks like ukgov have approved this change of use.
Dated February 24,
“In the UK, the MHRA has granted NHS Test & Trace an exceptional use authorisation to use certain lateral flow devices as self-tests to detect infection in asymptomatic individuals who otherwise would not be tested. For more information, please see the section on self-testing.”
No drama then....
The kits I've got are manufactured by Xiamen Bio - same version update as quoted below.
With the Innova rebadged products, are there any CE marks?
Good update Pottery, thanks
1 inch or 1 cm is anterior can't right remember. But have seen some demonstrations of these tests and the people testing themselves end up with their eyes watering, so not anterior.
If the swab is meant to go up the nose until resistance is met, then this would be a mid-turbinate swab rather than anterior. Pretty sure 1cm is anterior. Mid-turbinate offers better sampling while only providing slight discomfort. But again, some variability in sample taking like nasopharyngeal. The notorious John Bell interview mentioned that they were looking at converting the then current nasopharyngeal swabs to anterior. My guess is they tried it with Innova, suffered greater variability in sensitivity and thus revised it to use mid-turbinate instead.
The Biosure test mentioned the other day with Edinburgh airport involves a swab that only samples the side of the mouth rather than the back of the throat. I guess that the back of throat swab alongside the nasal is meant to enhance virus capture. But Avacta's test could very likely only be anterior. And the saliva version, a swab of the back of the throat or sides. The Biosure test is also spike protein so more likely the sides of the mouth.
And 2.5 cm means an inch up the nose
Not a different test. The brain tickler description was a myth from people who hadn't a clue about the Innova test. It's still very much a 1st generation test and looking forward to avacta's far more accurate lfd
Looks like they’ve updated it again?
This box had instructions inside the box:
Version 1.1.4, 24 November 2020
Manufactured for DHSC Westminster London
Another set of instructions outside the box:
Version 1.3.2, 15 January 2021
Manufactured under contract to DHSC Westminster London
Both versions, swab use method is the same.
Zero - I was given what appear to be the same tests as you a couple of weeks ago. When they were issued to me I was told to ignore the instructions that were in the box and was given a separate glossy instruction leaflet. I was told the old instructions had been revised hence the new leaflet. So I assume that the test itself is the original one but with revised instructions as to use.
My wife brought home a box of LFT’s today from the school where she works. They are de-badged Innova, the only reference I could find was on a 4cm square QA slip with tiny print naming Xiamen Biotime.
Manufactured 15 December 2020, Expiry 14 December 2022.
There are 7 tests in the box, she has to test twice a week, Wed night, (tomorrow) & Sun night, use up the box, get some more.
The instructions look different in the way to what I’ve always thought this nasopharyngeal “brain tickler” was supposed to be used.
The throat swab section “has to rub each tonsil 4 times,” but the instructions for nasal says to “put the same swab gently into 1 nostril until you feel slight resistance, (about 2.5cm up your nose). Roll the swab firmly around the inside of the nostril, making 10 complete circles.”
2/2.5cm into the nostril sounds very much like the “Anterior Nasal” procedure we are about to adopt on our tests.
Also, in the instruction manual it states that the test is suitable for:
“Adults aged 18+ Self test & report
Adolescents aged 12-17, Self test & report with adult supervision
Children under 12, Children under 12 should be tested by an adult, do not conduct this test if you do not feel confident testing a child. Do not continue if the child feels any pain.”
So now it looks like the original Innova test which poked your brain & was only able to be administered by a trained person, now only needs a shallow entry to the nose and can be done by anyone.
Is this the original Innova test, with newly approved instructions to enable testing by anyone? If so, how much more inaccurate is this going to be? It can’t be a “new” test, as I personally haven’t seen any new approval updates from Porton Down.
It might just be me, but I’m a little confused by this.
Atb, ZB