The Brooklyn teen accusing two NYPD detectives of raping her in the back of a police van insists she was handcuffed during the brutal assault — and that she has the hospital records to prove it.

The 19-year-old, who uses the alias Anna Chambers, said she suffered cuts to her wrists and hands when she was allegedly raped by Detectives Eddie Martins and Richard Hall in the unmarked van in Coney Island in September.

“The way [Martins] tightened it, it was so tight I couldn’t move my hands behind my back. My hands and wrists were so red, it scratched up my whole wrist, my hand, everything,” Chambers told The Post on Tuesday. “I just felt helpless. I couldn’t move, nothing. It was just cutting me. Every time he would move me, it would just cut at me more.”

A doctor who examined Chambers in the hours after the alleged sex attack wrote “scratches noted to the top of both hands” and “multiple small superficial abrasions over both hands,” according to the hospital report provided to The Post.

Martins and Hall have said the sex was consensual and that the teen was not handcuffed. They’ve pleaded not guilty to charges including rape, sex assault, bribery and coercion.

The teen’s lawyer, Michael David, said the medical records prove she was handcuffed.

“This is physical evidence from the hospital records that further substantiates Anna’s claims,” David said. “This completely discredits the allegation made by the defense counsel that she wasn’t in cuffs the entire time.”

“She has tiny hands. She’s petite, her hands are petite,” David said. “So these cuffs go onto her hand, too. That whole area got bruised. When you have cuffs on a little hand, the hand gets all swollen, too.”

Martins’ lawyer Mark Bederow called it “sad that a plaintiff’s lawyer would disclose medical records of his own client to shamelessly shop ‘news’ stories to prejudice the jury pool.

“She has testified that her hands were very bloody and battered at the hospital, yet no photos were taken by any hospital staff, police or prosecutors,” he added. “Furthermore, it’s odd that nurses first noticed the alleged injuries an hour and a half after she arrived and claimed she had been cuffed. We stand by our assertion that she never was handcuffed.”

Hall’s lawyer didn’t immediately comment.