Saline drips and ampules routinely used to treat patients on two wards at Stepping Hill Hospital in Stockport were deliberately contaminated by a "poisoner" at work during the summer of 2011, a court has been told.
Peter Wright QC, prosecuting 49-year-old nurse Victorino Chua, said the poisoner was contaminating the fluids with insulin with the intention of causing "really serious harm".
A total of 21 patients, he said, had suffered as a result of the poisoner's handiwork. Three died, one suffered a brain injury and the remaining seventeen were spared the worst effects of insulin poisoning thanks to prompt medical intervention.
The jury heard that security was tightened on the wards, and the instances stopped. But in January 2012, someone deliberately altered medical notes of patients on ward A3 of the hospital, altering recommended dosages - so a "30" would become an "80", or a "1" would become a "7".