The wife of Broadway star Nick Cordero has revealed the “Waitress” and “Blue Bloods” actor may never walk again following a battle with Covid-19.

Amanda Kloots posted to an Instagram story that her husband was on a ventilator and needed surgery to fix a blood flow issue in his right leg.

“The surgery went well. The doctor said for Nick’s heart and lungs right now, they’re in the best condition that they could be,” Kloots said in her post.

“His right leg is still an issue. There has been some blood flow issues coming down to his foot.”

“We don’t know what the damage will be. We don’t know if he will be able to walk again. We don’t know if he can walk again, what that will look like.”

Cordero was hospitalised in early April after initially diagnosed with pneumonia. He tested positive for Covid-19 and was treated in intensive care after developing a lung infection and fever that caused a dangerous drop in blood pressure.

He was placed on extracorporeal membrane oxygenation (ECMO) life support and remained unconscious while in recovery.

“The fact that he’s off (the ECMO machine) is great,” Ms Kloots said.

“I’m exhausted and so tired. And we are doing our best over here to hold down the fort,” she said. “We got good news today ... and I want to celebrate, so I’m going to go dance.”

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Cordero’s Broadway friends have been sharing videos online with the hashtag #WakeUpNick to help Ms Kloots remain positive while caring for their 10-month-old son, Elvis.