Doctors Found a Way to Make Dreaming During Anesthesia Much More Common

Using the protocol, anesthesia dreams were common, pleasant, and linked to a better patient experience.

15 Jun 2026, 20:25 by Tibi Puiu · ZME Science

Credit: Unsplash.

The operating room is perhaps the last place most people expect to have a nice dream. Yet a new study suggests doctors may be able to nudge the brain toward dreaming as patients come out of general anesthesia — and most of those dreams seem to be surprisingly pleasant.

Dreaming may help make the understandably stressful experience of anesthesia feel more positive and less pressing, potentially improving patients’ psychological experience of surgery.

For their new study, researchers at Stanford University tested a five-step protocol designed to make patients more likely to report dreams after surgery. Of the 452 patients who were interviewed after surgery, 69 percent reported dreaming. Nearly all of these patients received most elements of the dream-promoting protocol, but only 57 experienced all five components exactly as planned. In that fully adherent subgroup, dream recall rose to 93 percent.

To be perfectly clear: the patients were not awake on the operating table. The researchers stress that anesthesia dreams are different from intraoperative awareness, the rare and frightening state in which someone recalls the surgical environment while they are under the knife. In this study, no patient reported awareness during surgery.

More than 100,000 people undergo general anesthesia each day in the United States, so even a small improvement in how people experience their return to wakefulness could prove helpful.

“For many patients, anesthesia is the part of surgery they fear most,” said Dr. Boris D. Heifets, the study’s corresponding author. “These findings suggest that, with a simple and structured approach, anesthesiologists may be able to shape that experience in a more positive direction.”

The Trick May Be Leaving Patients Alone

The five-step protocol goes like this. Before surgery, patients were told they might dream and would be asked about it when they woke. Near the end of surgery, doctors used propofol to help patients wake gradually from anesthesia while monitoring their brain activity. They monitored brain activity with EEG. Near the end, they tried to keep stimulation to a minimum for at least 10 minutes. Then they asked patients about dreams as soon as possible after waking.

The most difficult part of the protocol was actually giving patients 10 uninterrupted minutes of quiet before waking them. Clinicians managed it in only 14 percent of cases. Operating rooms are very active environments where patients are moved, breathing tubes are handled, monitors beep continously and staff shuffle as they prepare for the next case.

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But when the 10-minute “hands-off” period did happen, dream recall soared. Among the 57 patients who received the full protocol, 86 percent remembered dreams with content and only 7 percent reported no dream at all.

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The dreams were reportedly mostly ordinary and often featured domestic themes (family, friends, work, school, etc.). Surgery-themed dreams occurred, but they were uncommon.

Among patients who rated their dream’s emotional tone, 86 percent described it as positive. None described a very negative dream. Patients who remembered dreams also rated the quality of their anesthesia “sleep” higher than those who did not.

All of this is intriguing because, for many patients, anesthesia often feels instantaneous. You close your eyes, and the next thing you know the operation is over. But the brain may not experience that perceived missing time as a complete blank. As this study suggests, some people pass through vivid dream-like states while under anesthesia, even though they remain entirely unaware of the outside world.

A Better Wake-Up

In a subgroup of 106 breast biopsy or lumpectomy patients, dreamers did not recover faster in the post-anesthesia care unit. They did not use less pain medication or fewer anti-nausea drugs. So, while the study suggests this protocol may help ease the psychological toll of anesthesia, a pleasant dream doesn’t seem to help with physical recovery.

“We know from prior case reports that some patients have experienced reductions in post-traumatic stress disorder symptoms, depression, and anxiety following anesthetic dreams,” said Dr. Heifets. “The key ingredient may be as simple as a 10-minute period of quiet during emergence from anesthesia.”