Canadian researchers say they have uncovered some potential errors that pose threatening ”catastrophic” consequences for some of the thousands of cancer patients who undergo daily chemo treatments.

The findings are already seeing changes and are part of a broader investigation into chemo safety prompted by the 2006 overdose death of a 43-year-old Edmonton cancer patient.

That investigation uncovered mistakes such as hooking up patients to the wrong infusion pump, delivering the drugs too quickly and failing to infuse the crucial chemical cocktail at all.

A report on the findings was finished two years ago but never made public until now.