Doctors studied 980 very sick patients who needed machines to help them breathe. These patients did not have severe lung injury. The team compared using very low pressure versus higher pressure settings on the breathing machines.
For the group as a whole, the low pressure setting did not clearly win. The chance of improvement was about the same for both groups. Some specific outcomes showed a small chance of benefit, but it was not strong enough to say it worked for everyone.
Safety checks showed no new problems with the lower pressure setting. The study was a re-look at old data, which means it cannot prove cause and effect. More research is needed to see if this works for different types of patients.
The findings suggest that doctors should be careful. Changing breathing settings might help some people, but it is not a magic fix for all critically ill patients.