Stream: implementers
Topic: Validity date / Expiration date
Jose Costa Teixeira (Feb 03 2021 at 16:21):
Medication.batch.expirationDate says "when batch will expire" - it's not clear to me what "batch" means here. Is it reserved for the manufacturing batch expiration date? How woud we support "Valid until" date?
Melva Peters (Feb 03 2021 at 16:48):
what is your use case for "valid until"? I'm not sure how you are using this?
Jean Duteau (Feb 03 2021 at 17:07):
and isn't "this medication batch is valid until X" the same thing as "this medication batch expires on X"?
Jose Costa Teixeira (Feb 03 2021 at 18:29):
When a Manufacturer makes a product, they declare "this is valid until"
Jose Costa Teixeira (Feb 03 2021 at 18:30):
that presumes certain storage conditions. Then the product is repackaged and must be taken up to X days after this repackaging
Jose Costa Teixeira (Feb 03 2021 at 18:31):
First one is manufactured issued - whether the date is for an entire batch or just a specific box, it's up to them.
Jose Costa Teixeira (Feb 03 2021 at 18:31):
the second one is for a specific box that must be used within a certain time
Jean Duteau (Feb 03 2021 at 18:32):
we had a request to allow for the specification of an expiry date for a specific batch of product. That is what this data element is for.
Jose Costa Teixeira (Feb 03 2021 at 18:35):
Is it sensible to make a request for specifying
a) an expiry date for something that is not of a specific batch
b) other validity date?
Jean Duteau (Feb 03 2021 at 18:36):
do you have a need for that? and is it something that needs to be conveyed when ordering/dispensing/administering the medication? those are the criteria the WG will use when looking at it (which you already know)
Jose Costa Teixeira (Feb 03 2021 at 18:38):
a) is just a suggested correction. I do not think that expiry date is a property of a batch, but of an instance
Jose Costa Teixeira (Feb 03 2021 at 18:39):
b) I believe it is something that is needed when supplying, dispensing, transporting and administering the medication.
Jose Costa Teixeira (Feb 03 2021 at 18:41):
Not sure it's common, hence my questions.
Jose Costa Teixeira (Feb 03 2021 at 18:41):
(well, I hope it's not common, but nowadays it is rather pressing)
Jose Costa Teixeira (Feb 03 2021 at 18:47):
I don't know where this attribute fits best (next to / under medication.batch? Immunization.lotnumber?
Jose Costa Teixeira (Feb 03 2021 at 18:57):
Jose Costa Teixeira (Feb 03 2021 at 18:57):
This is a repackaged box of vaccines. We had a good discussion around the challenges this brings, and I think it's good to raise awareness of it.
Rik Smithies (Feb 03 2021 at 20:38):
I would say that all medication has a batch even if it is a batch of one and even if you don't know what the number is or if it doesn't have a number. So a) is already covered - a date with no number. It applies to this instance even if there is a strong possibility that it applies to other instances also.
If other dates are needed, and I don't know if they are, we could make use of the ProductShelfLife datatype. Essentially a date with a type.
I am not sure what the two dates on that picture are. An expiry date and a shelf life perhaps - 5 days, relative to the shipping date. But maybe really that is just a more dynamic expiry date that overrides the first.
Jose Costa Teixeira (Feb 03 2021 at 20:41):
both are important
Jose Costa Teixeira (Feb 03 2021 at 20:50):
The first one is the one stated by the manufacturer which should never be exceeded. The other one depends on the repackaging
If that box were prepared on April 24, the expiry date would be 30th, the "valid until" could well be 1st May, so the earliest would prevail.
Rik Smithies (Feb 03 2021 at 21:06):
Sure. Before repacking, the second one looks like "5 days from repackaging" - which is a shelf life. An expiry and a shelf life would cover it.
Once it is shipped or repackaged or whatever, that date + shelf life becomes the new expiry date, overriding the existing expiry date. I am not sure the shipping date or original expiry date are necessary in a current instance of the Medication resource.
Jose Costa Teixeira (Feb 03 2021 at 21:14):
It is currently being captured and transmitted in the QR code as you see
Jose Costa Teixeira (Feb 03 2021 at 21:17):
Shelf life would be "this type of product lasts 5 days (in certain conditions?)" - it's definitional
The second date there says "this specific package only lasts until 20 Jan."
Jose Costa Teixeira (Feb 03 2021 at 21:17):
shelf life is the definition, this is the instance.
Jose Costa Teixeira (Feb 03 2021 at 21:18):
I am looking for the instance (hence starting with transactional resources like Medication and eventually Immunization)
Richard Townley-O'Neill (Feb 04 2021 at 03:04):
Maybe have itemExpiryDate.
Last updated: Apr 12 2022 at 19:14 UTC
