Juan Manuel Correa has been placed in an induced coma after being diagnosed with respiratory failure upon his arrival at a new hospital in London.
The American-Venezuelan suffered broken legs and a spinal injury in the crash which killed Anthoine Hubert in the Formula 2 feature race at the Belgian Grand Prix.
After undergoing treatment in Belgium, Correa was transferred to London for specialist care, where his latest symptoms were discovered.
A statement from the Sauber junior's parents read: "Honouring our son’s straight-to-the-point and honesty that characterises him, we wish to update you on the status of his injuries and physical condition.
"As time has progressed, new complications have surfaced as a consequence of the massive impact he suffered Saturday in Belgium. On his arrival to London, Juan Manuel was diagnosed with Acute Respiratory Distress Syndrome.
"This is an injury considered common in high impact accidents such as this one.
"Unfortunately, this injury resulted in Juan Manuel falling into Acute Respiratory Failure. Juan Manuel is currently in an Intensive Care Unit that specialises in respiratory injuries. At this point of time he is an in induced state of unconsciousness and under ECMO support. Juan Manuel is in critical but stable condition.
"We are confident that our son will surprise us like he always does with his tremendous fighting will and strength and will recover completely."
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.