This doesn’t mean this treatment is available yet.
Why oxygen levels matter during bronchoscopy
During bronchoscopy, the scope can briefly block part of your airway. If sedation makes you too sleepy, oxygen levels can drop. Doctors watch oxygen saturation (SpO2) closely. They also watch blood pressure, because some sedatives can cause it to fall. And they want to avoid injection pain, which can make the experience uncomfortable.
Think of your airway like a highway. The scope is a car entering the lane. Sedation is the traffic controller. If the controller slows things too much, cars back up. The goal is smooth flow: you stay relaxed, but your breathing keeps moving.
How remimazolam works in the body
Remimazolam is like a key that fits a specific lock in the brain. It turns down activity to ease anxiety and discomfort. What makes it different is speed: the body has an enzyme that quickly breaks the key apart, so the effect fades fast. That quick metabolism may help people wake up sooner and may reduce lingering side effects.
Propofol works differently. It’s more like a dimmer switch for brain activity. It can be very effective, but it may also slow breathing and drop blood pressure more often.
What the study looked at
Researchers reviewed charts from October 2024 to October 2025. They included adults having fiberoptic bronchoscopy with sedation that preserved spontaneous breathing. They compared two groups: remimazolam and propofol. The main question was simple: did the sedation work as intended? They also looked at oxygen levels, blood pressure, pain, and recovery time.
The study included 76 patients in total: 36 in the remimazolam group and 40 in the propofol group. All were relatively healthy adults (ASA I–II), meaning they didn’t have major other illnesses.
Both groups had a 100% sedation success rate. In other words, the sedation worked for everyone.
Oxygen levels were higher in the remimazolam group at the start and at 5, 10, and 15 minutes into the procedure. The difference was statistically significant, meaning it was unlikely due to chance.
Fewer people in the remimazolam group had low oxygen levels: about 17% compared to 35% with propofol. Injection pain was also lower: none in the remimazolam group versus about 18% with propofol. Low blood pressure was less common too: about 6% versus 23% with propofol.
Recovery time was shorter in the remimazolam group. But there’s a catch: the researchers noted that reversal medication (flumazenil) was used routinely in that group, which can speed up wake-up. So the faster recovery may not be solely due to remimazolam itself.
Onset time and satisfaction scores were similar between the two groups.
If you’re scheduled for bronchoscopy and want to know your sedation options, ask your doctor whether remimazolam might be appropriate. It appears to offer similar success with fewer side effects in this study, especially for oxygen levels and injection pain. However, this was a small, retrospective study, and the recovery time finding may be influenced by reversal drug use.
Availability can vary by hospital and country. Remimazolam is newer and may not be used for bronchoscopy everywhere. Your doctor will consider your health history, medications, and the specific procedure.
Limitations to keep in mind
This study was retrospective, meaning it looked back at charts rather than assigning treatments in advance. The sample size was small, and only relatively healthy adults were included. Recovery time differences may be confounded by routine flumazenil use. Larger, prospective studies are needed to confirm these findings.
What happens next
Researchers will need larger, prospective trials to validate these results and to clarify whether remimazolam’s recovery advantage holds without routine reversal. If confirmed, remimazolam could become a more common choice for bronchoscopy sedation, especially for patients at higher risk of low oxygen or blood pressure. For now, talk with your doctor about the best sedation plan for your situation.