Two prisoner officers were attacked by an inmate serving time for stabbing his father in the back with a 30-centimetre knife.
Lewis Cooper-Taylor's dad's lung was punctured and he needed extensive surgery.
The 27-year-old had been sentenced to eight years behind bars with an extended licence of three years on his release.
He had been jailed for possessing an offensive weapon and wounding with intent after the attack on his dad.
The new offences happened on May 21 in Lowdham Grange Prison.
He punched a female officer in the face, striking her on the left ear and jaw joint.
She described experiencing "instant pain" and losing her balance and feeling dizzy, Nottingham Crown Court heard.
He smirked as he then lunged at her with an item in his hand, aimed at her face.
She believed it was a razor blade wrapped in something.
Lowdham Grange was sent into lockdown when a second officer was slashed in his face three times
Cooper-Taylor made threats. A negotiation team arrived and spent 40 minutes trying to persuade him to surrender.
He dropped a blade from a dismantled disposable razor.
Judge John Burgess said the male officer's injuries did not require stitches.
"It could have been charged as wounding which would have made a greater difference to my sentencing power," he added.
The man had to undergo tests afterwards.
The first officer needed 11 days off work with a swollen jaw.
The judge sentenced the defendant in his absence after he declined to attend a video suite to speak to his lawyer.
The judge said he is serving an extended sentence (including the licence period) of 11 years for stabbing his father with a 30-centimetre knife.
"Apparently it was something to do with a SIM card," he said of the previous attack.
The judge said he was not sentencing him for that but "it is the background to what happened in May last year".
He imposed six months each consecutive on admitted charges of assaulting an emergency worker (the prison officers) and 20 months consecutive for possessing a weapon in prison.
He said the only mitigation in the case was Cooper-Taylor's plea of guilty.
