Nurses gathered on the picket line outside of Mount Sinai Hospital Saturday for day six of their strike.

The New York State Nurses Association said Friday that its bargaining team began meetings with their counterparts at the three impacted Mount Sinai hospitals Friday morning at the request of a mediator. Nurses said negotiations lasted from 10 a.m. to 8:30 p.m., but no progress was made.

The union met Thursday night with NewYork-Presbyterian officials and a federal mediator in the first negotiations since roughly 15,000 nurses walked off the job Monday. NewYork-Presbyterian says it is also scheduling their next session through a mediator.

Both sides said the hours-long meeting ended with very little progress made to end the city’s biggest strike of its kind in decades.

“It’s really scary that we’re not being paid, and we don’t have health insurance right now, but the overall vibe is that we’re gonna take this to the end and we’re not gonna settle,” Jacqueline Vanvliet, a nurse striking at Mt. Sinai, said.

The hospital said in a statement that the discussions focused on addressing the union’s concerns about staffing levels, but that it still views the union’s proposals as “unreasonable.”

“The staffing issues up there are insane, especially in the ED [Emergency Deparment]. They got one nurse to at least 20 patients — it’s like a zoo,” Alison McCarry, a nurse on strike at Mt. Sinai, said. “We have to stick this out.”

The union said it put forward revised proposals that hospital officials rejected without offering a counter proposal. It also said the talks ran past midnight and were observed by about 70 nurses after the proceedings were eventually opened up to regular union members.

Both sides said there’s so far no further plans to meet.

“While we continue to be far apart, we are committed to bargaining in good faith,” NewYork-Presbyterian said in a statement. “We are committed to safe staffing and have the best staffing ratios in the city.”

Meanwhile union negotiations still have not resumed with Montefiore, the third major hospital system impacted.

The union said previously that it had expected to sit down with officials from the Bronx-based health care provider Friday, but the hospital disputed that claim, saying a meeting was never planned.

“NYSNA nurses respect the mediators and are ready and willing to come to the bargaining table when they call,” Nancy Hagans, the nurses’ union president, said in a statement. “We urge hospital executives to do the same.”

Each medical center is negotiating with the union independently, and not every hospital run by the three health care systems is affected by the strike.

The affected hospitals say their operations have been running smoothly since they hired thousands of temporary nurses to keep emergency rooms and other facilities open during the strike.

Dr. Philip Ozuah, president of Montefiore Einstein in the Bronx, one of the hospital campuses impacted by the strike, praised those still on the job.

“Another day, another miracle,” he wrote in a letter to staff. “Many thanks to our amazing teams, our most complex and exacting mission continues…providing life-saving care.”