Anna Byers

Anna Byers was a patient in the Critical Care Unit at Saint Barnabas Medical Center whose severe, recurring insulin crashes tracked the use of her heparin drip. Her case became one of the clearest early signs that the hospital’s unexplained patient collapses might involve insulin entering IV bags rather than a routine medical error.

Patient and first crisis

On Valentine’s Day, three days after a suspicious IV bag at the hospital had been found to contain insulin as well as its intended saline and heparin, Byers was placed on a heparin drip. Within half an hour she was sweating, confused, nauseous, and shaking with weakness. A blood test showed an extraordinarily high insulin level.

The staff first tried orange juice, but it did not correct the crisis. They then gave her dextrose intravenously, delivering sugar directly into her bloodstream. Even that could not keep pace with the insulin’s effects: Byers continued to crash through the morning, afternoon, and night. With a catheter procedure scheduled for the next morning and concern that she might be too unstable to undergo it, her physician ordered the heparin drip removed.

Relapse and recovery

The change was striking. Once the drip was unplugged, Byers’s insulin-related symptoms eased and she began to feel better. By 2 p.m. she was stable in her room, her blood-sugar crisis had vanished, and her surgical wounds had clotted. She was ready to resume heparin, so an IV was started again.

Soon afterward, the crisis returned. Nurses gave her sugar water in an effort to counter the continuing collapse; she repeatedly stabilized and worsened, drifting in and out of consciousness. By 11 p.m., her blood sugar was too low to register. The nurses rushed her to the ICU, and within twenty minutes of removing her from the drip, she was feeling better again. The repeated sequence—worsening on heparin, improvement when it stopped—made the connection difficult to dismiss.

Significance in the investigation

Byers’s experience was part of a wider pattern of unexplained insulin crashes at Saint Barnabas Medical Center. Investigators later found insulin in another patient’s heparin bag, and microscopic examination of that bag revealed unusual needle punctures, including marks around its perimeter. Those findings supported the suspicion that IV bags had been intentionally tampered with, but the available account does not say that Byers’s own bag was tested or establish who exposed her to insulin.

Her role in the narrative is therefore that of a patient whose repeated clinical reversals exposed a dangerous pattern. The drip that was supposed to support her care became the circumstance associated with her recurring crisis; removing it brought relief, and restarting it brought the crisis back. Her case helped turn unexplained collapses into a focused question about contaminated medication and patient safety.