A Halifax-area woman who had an unnecessary mastectomy after her test results were swapped last year says she’s still devastated but is pleased the health authority has designed a new system to prevent future errors.

Sharon Fisher was told she had breast cancer and opted to have her breast removed.  A few months later she was told her lab results were mixed up with another patient’s in the Capital Health authority. She didn't have cancer and didn’t have to lose her breast.

The reminder haunts Fisher every time she gets dressed.

“You never get used to it. I still don’t look in the mirror and I won’t… If I don’t focus on what happened, I’m OK,” Fisher told CBC.

The other patient who needed surgery was not scheduled for the procedure until after the mistake was caught.

BARCODE health

A new barcode system that replaced the program that led to a Nova Scotia woman receiving an unnecessary mastectomy cost the province about $450,000. (CBC)

In a second separate case, Capital Health admitted tissue samples were switched before a pathology analysis. One patient had an unnecessary diagnostic biopsy and the other patient’s follow up was delayed.

The mistakes were later detected in laboratories.

Capital Health has made big changes to its pathology lab since that mistake in February of 2013.

“This affected everyone working in the lab because that created anxiety for everybody. But I think we hopefully have learned from that event,” said Laurette Geldenhuys, service chief and division head of anatomical pathology at the Queen Elizabeth II Health Sciences Centre in Halifax.

'They can relax'

The changes arrived in January in the form of a $450,000 computer system.

The computer generates barcodes to match patients' paperwork and the samples themselves. At every stage, the codes ensure the samples, from moles to bowel tissue, are always linked to the right patient.

Computers talk to each other every step of the way.

“We all feel really excited that barcoding is in place now. Because this gives us some reassurance that something like that is less likely to occur,” said Geldenhuys.

For Fisher, it's bittersweet relief.

'I’m just happy something positive came out of something so negative.' - Sharon Fisher

“That’s terrific. You could feel safer now….As devastating as it was, it’s good to know something good happens, that this won’t happen to anybody else. It shouldn’t,” said Fisher.

“I’m just happy something positive came out of something so negative. That’s a big thing for me. That it was possible to correct something that was flawed in the beginning.”

She said she often thinks about other patients. Fisher says her friends have been anxious about their test results since her story made headlines.

“It's nice to know they can relax too.”

Despite the changes Fisher says she’s still nervous about returning to the hospital, especially for surgery.

“I always trusted it.  I never, ever questioned it. So when this happened it was shocking because I always felt safe,” she said.

Fisher's lawyer, Ray Wagner, says there's no agreement with Capital Health about financial compensation for the mastectomy error. He says discussions are underway.