Victorian paramedics are protesting after two women avoided a prison sentence for violently assaulting an emergency worker.

Amanda Warren, 33, and Caris Underwood, 20, had the jail sentences they received for assaulting paramedic Paul Judd in 2016 quashed on appeal by Victoria County Court judge Barbara Cotterell yesterday.

Warren and Underwood were originally sentenced to six months and four months respectively, but Judge Cotterell said their difficult childhoods and young families meant the minimum six-month term should not apply.

Caris Underwood (far left) and Amanda Warren have been spared jail. (AAP) (9NEWS)

Mr Judd broke down as he was told the pair would avoid jail.

"In one word, probably injustice - I just feel that justice hasn't been done," he said.

Following the decision, emergency service workers across the state have expressed outrage.

Several ambulance vans have been spray-painted with the phrase, “it’s never okay to assault a paramedic”, with images of the vans shared to Twitter with the hashtag “itsneverokay”.

Health Minister Jill Hennessy tweeted her “thoughts are with all our paramedics and their families”.

“It’s never okay to harm a paramedic. Devastating decision… laws needs changing- and will,” Ms Hennessy said.

State laws introduced in 2014 require anyone who intentionally injures an emergency worker to be imprisoned for at least six months, unless there are "special reasons".

Judge Cotterell said she did not think Warren or Underwood were "suitable vehicles" for general deterrence and said the difficult childhoods they had constituted "special reasons".

Details about the women's past cannot be published for legal reasons, but judge Cotterell found Warren suffered from a mental illness and had impaired mental function.

She also said Underwood, who was 18 at the time of the assault, had a lowered psychosocial immaturity linked to her traumatic childhood.

The pair were drunk when they assaulted Mr Judd in Reservoir in 2016, who was attending a drug-affected patient.

Two years on, the 63-year-old continues to live with pain.

Mr Judd wiped away tears as another paramedic comforted him in court, while colleague Chenaye Bentley, who witnessed the attack, sat next to him.

The victim was repeatedly punched and left with a broken foot while he and a colleague tried to treat an unconscious man at Reservoir on March 31, 2016.

The paramedic of more than 40 years needed three operations and has been unable to return to work.

Paramedic Paul Judd told reporters he believes justice wasn't served today. (9NEWS) (9NEWS)

Judge Cotterell apologised to Mr Judd after re-sentencing Warren to a three-year community corrections order, while Underwood was given a two-year order.

"I'm really sorry and can see that you are badly affected," she told him.

"I just want to say I wish there was more I could do for you.

"I can tell that you are suffering and feel that a great injustice has been done."