Based on the information you've provided, this is my best guess. Also known as "sedation vacation" or "sedation holiday".

"Daily interruptions of sedation ("sedation holiday" or "sedation vacation") became the standard of critical care for weaning from mechanical ventilation in ICUs around the world after J.P. Kress et al's landmark 2000 New England Journal of Medicine paper showing daily sedation interruptions freed ~64 patients from ventilators an average of 2 days sooner, and shortened ICU stays by 3.5 days, without safety risks, compared to ~64 patients getting usual care."
https://pulmccm.org/randomized-controlled-trials/sedation-va...

"Daily breaks from sedative infusions have been shown to decrease mortality and shorten hospital stays. Studies have shown that both lighter sedation and daily sedation holidays for mechanically ventilated patients lower the risk of mortality and complications, such as drug-induced delirium or ventilator associated pneumonia.
Sedation holidays can help avoid drug accumulation and oversedation. They may allow your patient time to reorient, and even reduce psychological trauma from critical care stresses. Finally, they may provide you with an important opportunity to assess your patient’s neurological and respiratory status, as well as his or her readiness to be weaned from sedation and mechanical ventilation."
https://www.medtronic.com/covidien/en-us/clinical-solutions/...