US PIV: Indications
IV access is typically obtained to provide therapies not possible or less effective via alternative routes. Frequently cited indications are:
- Intravenous fluids
- Parenteral nutrition (limited duration)
- Blood products
- Medication administration*
- Prophylactic for procedures
- Prophylactic in unstable patients
In general, critically ill patients require IV access, even when not actively getting IV therapy.
By itself, venous sampling is not a good indication for peripheral IV access.
*It is generally thought that medications with a pH < 5 or > 9 should be given centrally, but there are many caveats to this. Here is one resource that lists the pH and Osm of many medications.,
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