A 17-year-old racing driver who fractured her spine in a horrifying crash at the Formula Three Macao Grand Prix has vowed to return to the sport after surviving surgery lasting nearly half a day.

German Sophia Floersch flew off the track on Sunday, hurtling into marshals and photographers, before being rushed to a Macao hospital in a stable condition.

"I survived the operation which took 11 hours. Hope from now on it only gets better," she wrote in a Facebook post on her official account late Tuesday.

"I'm going to come back!" she added.

Floersch said she had to stay "a few more days" in Macao until it is possible to transport her elsewhere.

She thanked the medical staff who treated her as well as the people who helped at the scene of the crash for their "encouraging, calming words in these tough minutes in my car."

Dramatic footage captured gasps from the crowd as the Van Amersfoort Racing driver's car flew through the air and into safety netting at the Grand Prix venue Guia Circuit's Lisboa bend, a sharp right-hander.

Running 16th, she lost control in a contact down the straight, launched off a curb and bounced off TOM'S Dallara-Toyota racing car of Japanese rider Sho Tsuboi.

"My thoughts are also with everyone who was involved in the accident. I hope everybody is healthy," Floersch said in her post.

The International Motoring Federation has said it will investigate the crash.

At least three people have died on the Macao Grand Prix circuit.

British rider Daniel Hegarty died last year after hitting a barrier at Fisherman's Bend during the Macao Grand Prix's feature motorcycle race.

In 2012, Portuguese motorcyclist Luis Carreira and Hong Kong driver Phillip Yau were killed within two days of each other during the Macao Grand Prix.