MADISON, Wis. -- Two weeks after the accidental death of a 16-year-old patient at St. Mary's Hospital in Madison, administrators responded to lingering questions on Wednesday about patient safety.

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St. Mary's officials held a news conference on Wednesday and fielded questions about steps being taken to protect all patients. However, they said that because of confidentiality rules, they weren't about to discuss the case involving Jasmine Gant, WISC-TV reported.

According to unnamed sources, Gant -- who was pregnant -- was given the wrong drug while in labor. The state agency that licenses registered nurses said last week it will investigate the potential involvement of a nurse in Gant's death.

Hospital officials said that since Gant's accidental death, there has been an influx of questions about the hospital and the care it provides. Besides the Gant case, others have come forward in the media to question patient safety, the experience of nurses and staffing levels, especially as the hospital expands.

Dr. Frank Byrne, St. Mary's president, countered those concerns by citing a recent independent study conducted last spring that reported St. Mary's has a "generous" amount of nurses, with nearly 1,000. It said that 5 percent of them are in training and about 25 percent have been there more than 16 years.

One unnamed source told WISC-TV about another incident, and said that it was against hospital policy to have just one staff nurse and one trainee in the intensive care unit. The source said that they felt that's not enough staff.

Hospital officials said on Wednesday that it's not against hospital policy, and the staff decides on a case-by-case basis who will be in a unit to deliver the best care to any patient, WISC-TV reported.

"The system is not perfect and requires judgment and part of that, of what we were commended for by the nurses credentialing center, was providing an environment where people aren't only allowed to have input, but they've been prepared," Byrne said.

Byrne also said that a bar code system in place is another safety measure, which electronically tracks the drugs that should get administered to a patient.

Officials said that the hospital is confident in the company that made the bar code system, but said the potential for human error is still a factor. Joan Ellis Beglinger, vice president of patient care, said that they've worked to reduce those chances.

"We partnered with them over a period of several years to try and figure out how technology could help us eliminate any human being potential to make a mistake," she said.

Byrne said that while precautions are made and systems arranged to avoid errors, it will always remain a possibility.

"I don't think in any setting and even here at the hospital, where people entrust their care and their lives to us, there's any system that has completely eliminated the chance for error," he said.

Administrators also emphasized that the hospital tries to ensure each patient receives exceptional care, and this year, the hospital increased the number of nurses in the ICU and emergency department.