Efficacy and Safety of Propofol as a Sole Sedative for fMRI Sedation in Autism Spectrum Disorder Individuals with Low IQ.
One shot of propofol safely gives clear fMRI pictures in 4- to young learners with autism and low IQ a large share of the time.
01Research in Context
What this study did
Doctors gave one dose of the sleep drug propofol to 77 kids and young adults with autism. All had IQ scores below 70 and needed an fMRI brain scan.
The team watched heart rate, breathing, and wake-up time. They also rated if the scan pictures were clear enough to use.
What they found
Four out of five scans (a large share) came out crystal clear. No child had a serious drug reaction.
Kids woke up in about 20 minutes and went home the same day.
How this fits with other research
Grodberg et al. (2012) and Mandell et al. (2016) built quick autism screens for clinic rooms. Xiong’s work adds a safe way to get brain data when those same low-IQ patients need imaging.
Robinson et al. (2016) showed observer scales can track empathy in autism. Propofol does the opposite—it turns the brain “off” for a few minutes so pictures can be taken. Both studies use case-series designs, but for very different goals.
Bao et al. (2017) validated a pain checklist for preschoolers with autism. Together these papers show the field is filling the toolbox: we can now measure pain, behavior, and even brain waves without hurting the child.
Why it matters
If you serve youth with severe autism, you can now tell parents that a single propofol shot gives an a large share chance of a usable fMRI with no serious side effects. That may cut repeat scans, save money, and reduce stress for the whole family.
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02At a glance
03Original abstract
Autism spectrum disorder (ASD) is a group of complicated neurodevelopmental disorders. Functional magnetic resonance imaging (fMRI) can help to analyze the aberrant neurological functioning in ASD. However, due to their limited cognitive abilities, ASD individuals with low IQ may face challenges in cooperating during fMRI scanning. Consequently, sedation becomes necessary for them. To analyze and evaluate the sedative efficacy and safety of a single intravenous propofol sedation regimen for ASD individuals with low IQ undergoing fMRI examination. Seventy-seven ASD individuals with low IQ, aged 4 to 23 years, who underwent fMRI examination under propofol sedation, were included. Details of the sedation protocol, evaluation indices for effectiveness such as framewise displacement (FD) and temporal signal-to-noise ratio (tSNR), as well as safety assessment measures including pulse oxygen saturation (SPO2) and blood pressure were collected. Adverse events were also recorded. Data analysis was conducted upon completion of the study. Body movement was observed in 12 patients. The median and quartiles (25th percentile, 75th percentile) of FD was 0.065 (0.057, 0.086) mm, while the tSNR averaged at 89.6 ± 11.4. The image data from sixty-two cases (80.5%) were classified as high quality based on their tSNR surpassing 80. No serious adverse events, such as oxygen desaturation, hypotension, nausea, or vomiting, occurred that necessitated hospitalization. The exclusive propofol intravenous sedation protocol employed in this study demonstrates efficacy and safety for administering fMRI examinations to ASD individuals with low IQ, thereby warranting further investigation and validation towards its adoption in clinical practice.
Journal of autism and developmental disorders, 2025 · doi:10.1111/pcn.12014