VOICE-OVER: Welcome to one of ConsExpo Web's online tutorials.
This video will give you insight into the oral exposure models...
that are used in the ConsExpo Web software.
Oral exposure from using non-food consumer products...
is typically the result of unintended contact or related to the incorrect use of a product.
Only teething rings and toys for the very young are intended for oral exposure.
Within ConsExpo Web, three types of oral exposure are distinguished.
The first is direct ingestion from products...
or through contaminated fingers that come into contact with the mouth.
The second is oral exposure to food packaging materials...
through the consumption of food.
The third is secondary ingestion...
through the inhalation of aerosols from spray application.
The direct ingestion model is subdivided into three modes.
The direct oral intake mode, the constant rate mode and the product mouthing mode.
Direct oral intake is a low-tier mode...
that describes the amount of the product ingested directly.
It is suitable to describe accidental oral exposure...
or in cases when details regarding oral exposure are lacking.
The mode requires information on the ingested amount...
the weight fraction of the substance and body weight...
to determine the exposure per unit of body weight.
The constant rate model describes ingestion per unit of time.
This mode can be used to refine the direct oral intake mode...
when information on the period of time...
someone has ingested a product or material is available.
The mode requires a rate and duration.
It can also be used to describe mouthing behaviour.
However, a more suitable mode to describe mouthing behaviour is described next.
The product mouthing mode...
describes the migration process of a substance to the mouth during mouthing.
The migration rate is described as the amount of substance...
that is released per product surface area mouthed per second.
This mode is used for typical mouthing scenarios with toys or baby products...
and when the migration rate is known.
The more product is mouthed...
the longer and the faster a substance is released...
and therefore the higher the exposure will be.
The next model is the migration from packaging material model.
It describes indirect exposure to substances from packaging material...
that migrated into food.
It has two modes describing the way a substance migrates...
from the packaging material to the food.
The instant release mode and the constant release mode.
The model describes the step during which the substance migrates...
from the packaging material to the food, which is then consumed.
When selecting the constant release mode...
storage time is relevant to determine the concentration...
that may have already migrated to the food prior to consumption.
The information on migration is vital for the use of this model.
Finally, a model is available to the user that describes secondary ingestion...
resulting from the inhalation of spray particles.
This model is an option when using the spray model.
In the spray model, there is a tick box marked...
'Include oral non-respirable material exposure'.
When selected, the model assumes that inhaled spray particles...
that do not enter the respiratory tract are ingested.
By default, it considers sprays...
in the range between 15 and 50 micrometres in diameter.
The model calculates the oral exposure itself...
and does not require more information than already required for the spray model.
We hope this tutorial has helped you to familiarise yourself with ConsExpo Web.
Our support does not end here.
Visit the ConsExpo website for help pages...
that provide information on ConsExpo Web and a user manual.
You can also access the 'i' and '?' icons within the software...
which are there to give you extra help when needed.
If you still have questions or need assistance...
please contact us at consexpo@rivm.nl.