Pre-filled saline syringes

What would be a good use for these other than to flush an IV? Do they expire?

At first I thought they could be used for flushing the eyes, but apparently they don't have a buffer (whatever that is) and aren't supposed to be used for that. Then I thought maybe a person could use them to rinse around a wound?

Any ideas you care to share, health care professionals?

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Pre-filled saline syringes