Just to be absolutely clear:
- each resident has their own meter
- a number of different nurses administer tests on individual residents using only that resident's meter
- that meter retains the results of tests by other nurses but not the tests you administer
If this is so, it indicates that you are doing something different to the other nurses.
Probably best to team up with another nurse and check the procedures you both follow, and both check after each test that you can retrieve the reading.
Edit: had a quick look at the user manual and there is nothing in there to indicate that you can delete an individual reading from the meter. Have you used a computer to download the readings and check that all your readings are missing but all the others are there?
Edit 2: "
Deleting the Memory.
With “dEL” and a flashing “ M” symbol on the display, press M
button and select “No” to keep the results in memory then press
SET to skip.
To delete all the results, press M button and select “Yes” then
press SET to confirm. “OK” and “M” are displayed on the meter,
which indicates that all data stored is deleted.
"
However this states that ALL data stored in memory is deleted, not an individual reading.