How this hold feeds the lactic-acidosis box
Contrast is on the boxed-warning risk list because a kidney hit plus metformin is an accumulation setup. The symptom cluster stays on the lactic scan.
This URL only files the hold and the 48-hour restart. It does not reprint the full box.
Where a five-day holiday is not a protocol
Comment threads invent week-long stops. The labelled move is hold at or before the study in the named groups, then a 48-hour eGFR. Ask if your center writes extra hours.
The 850 panel keeps a short dye chip. Board-check: named groups, 48 hours, restart if stable. Then stop.
Why the last 850 time belongs on the card
Radiology needs the last swallow hour and the restart rule in one place. Guessing from a forum ('stop five days before every CT') creates either a glucose gap or a missed hold.
If last month's eGFR was already 32, the dye talk is secondary. You should not have been starting 850. Kidney cuts are the eGFR scan.
Who actually holds the 850 around dye
The hold is not 'everyone who ever swallowed metformin.' It is eGFR 30-60, liver disease, alcoholism, heart failure, or intra-arterial iodinated contrast. Write which of those apply before radiology.
People with eGFR well above 60 and none of those stories still ask. The prescriber and the radiology protocol own extras. This scan names the labelled set.
How route of dye changes the hold
Intra-arterial iodinated contrast is named even when the other comorbidity boxes are empty. Venous studies still trigger the hold when eGFR is 30-60 or when liver, alcohol, or heart-failure history is present.
Do not treat every X-ray as a dye study. Iodinated contrast is the labelled trigger, not a plain film.
What the 48-hour eGFR is for
Re-evaluate eGFR 48 hours after the imaging procedure. Restart metformin if renal function is stable. Feeling fine on the table is not that draw.
Restarting in the recovery bay because the IV came out is the other error. The kidney number after the dye is the tag.