LONDON — The former racecar driver Michael Schumacher was in a stable condition, with no significant changes in the 24 hours since his doctors met reporters on Tuesday, his manager said on Wednesday. Schumacher, 44, remained in a critical condition, in a medically induced coma and on life support systems, after two brain operations.

The manager, Sabine Kehm, a member of Schumacher's inner circle in the years when he was the dominant driver in Formula One, said the decision not to hold another briefing by his medical team was a measure of progress. A panel of doctors had met reporters twice in the first 48 hours after Schumacher sustained a head injury in a skiing accident on Sunday.

"Michael's condition has been supervised all night and remained stable over the night and also now," Kehm told reporters gathered outside the Grenoble University Hospital Center. "The good news for today is that we do not have the feeling to hold a press conference because there are no significant changes."

With a group of about 100 reporters and television crews encamped outside the hospital, the medical team's vow not to get caught up in a media circus — not the phrase the doctors have used, but the clear intent of statements they have made about limiting their encounters with reporters while Schumacher's prospects of survival remain uncertain — appeared to have been stiffened by a jarring incident on Tuesday.

Kehm told German reporters she had been told by hospital officials that "a journalist disguised as a priest has tried to get access to Michael's room." She did not identify the journalist involved, or his nationality, but said his bid had failed. "This is something I would not have thought possible," Kehm said, according to reports by several German newspapers on Wednesday. "As soon as his disguise was recognized, he was expelled from the hospital."

Her account was confirmed on Wednesday by hospital officials, who had previously won the voluntary agreement of photographers and television crews not to focus on the rooms being used by Schumacher and members of his family, who are said by the doctors to have given their consent to the medical procedures being used, including the second operation on Monday. They include Schumacher's wife, Corinna, his two teenage children, his brother Ralf Schumacher, also a former grand prix driver, and his widowed father, Rolf.

Members of the surgical team who performed the two operations on Sunday and Monday offered detailed descriptions to reporters of the procedures involved. But under a barrage of questions, they emphasized that their public statements would be strictly limited to "facts," without venturing into any prognoses on whether Schumacher would survive, or, if he did, how extensive the lasting brain damage involved might be, and how remediable it might be under therapy. In any case, they said, it was too early to make assessments of that kind.

It could take "weeks or months" before the situation would allow reliable judgments to be made, they said, and in the meantime Schumacher's condition could change sharply at any time. "Things can change very quickly, in a bad way or a good way," Jean-Francois Payen, an anesthesiologist who is head of the Grenoble hospital's intensive care unit, said.

The doctors said they had acted in both operations to evacuate blood clots to relieve the pressure that can cause lasting brain damage, and even prove fatal, as the brain swells in the aftermath of the kind of violent impact Schumacher suffered. Officials at the Méribel resort in the Haute-Savoie region near France's border with Italy and Switzerland have said that Schumacher fell and hit his head on a rock on an ungroomed snowfield between two of the resort's main runs.

Both operations involved drilling through Schumacher's skull. In the first, undertaken immediately after Schumacher arrived at the hospital by helicopter, barely 90 minutes after the accident, the surgery involved the right side of his head; in the second, 24 hours later, the left side. The doctors said that while both operations had been successful in relieving pressure, they had left multiple hematomas, or blood clots, deeper inside his brain that were not accessible to further surgery.

Among the many neurosurgeons who have come forward to discuss the Schumacher case since his accident — experts who are not involved in his care — the common view has been that the injuries described by the Grenoble team leave open a wide range of possibilities. They have described these as running from a full recovery to various forms of long-term impairment, and, at the worst, to a situation in which Schumacher might lose his life without ever regaining consciousness.

In the meantime, Kehm, his manager, has given reporters some details of the accident that appear intended to answer those who have suggested that the accident was in some way related to the aggressive, win-at-all-costs approach to racing that helped Schumacher win a record 91 grand prix in a Formula One career spanning 21 years.

Some reports have suggested that Schumacher might have been reckless in skiing into an ungroomed snowfield that photographs taken at the time of the accident show to have been studded with rocky outcrops. But Kehm said that Schumacher and his 14-year-old son, Mick, were part of a larger group of skiers who ventured onto the snowfield. She also said that he was not going fast when he fell and hit the rock, despite the fact that his skiing helmet was split by the force of his impact.