Procedure Sedation With Dexmedetomidine in Children With Autism Spectrum Disorders During Magnetic Resonance Imaging

Completed

Brief Summary: Autism spectrum disorders (ASD) is a neurodevelopmental disorder and is characterized by functional impairment in social communication, restricted interests, and repetitive behaviors.The children with ASD has been shown different drug responses from the normal population of children. The children with ASD maybe more prone to elevate anxiety and the difficult of sedation during MRI scanning.The purpose of this investigation was to compare the effectiveness of dexmedetomidine sedation in children with and without ASD undergoing MRI scanning.

Detailed Description: The use of medications in adolescents and young adults with ASD is extremely common. However, few data address the effectiveness and harms of medications for procedural sedation in this population. It's advisable to be used as a first line medication with alpha-2 agonists for procedure sedation. The primary goal of this study was to compare the effectiveness of dexmedetomidine sedation, also determine the 50% and 95% effective doses in children with and without ASD undergoing MRI scanning.

Recruitment & Eligibility

Inclusion Criteria

ASA physical status I or II,
Patients aged 2 years through 12 years of age scheduled for procedure sedation during MRI scanning
Patients must have a diagnosis of Autism Spectrum Disorder (ASD) according to the DSM V (autism group) or no history of neurodevelopmental concerns (control group). Child in control group is matched to an autism spectrum disorder participant according to age, gender, and ASA level.

Exclusion Criteria

Known allergy or hypersensitive reaction to dexmedetomidine
Organ dysfunction, and significant developmental delays or behavior problems
Cardiac arrhythmia
Known. acyanotic congenital heart disease or children after cardiac interventional procedures for follow-up examination

Arm && Interventions

Group	Intervention	Description
Autism Spectrum Disorder	Dexmedetomidine	Patients with a diagnosis of autism spectrum disorder
Control	Dexmedetomidine	Patients with no developmental diagnoses

Primary Outcome Measures

Name	Time	Method
The 50% and 95% effective doses of intranasal dexmedetomidine	up to 1 hours after MRI scanning	Children were randomly allocated to receive sedation with 1 of 4 doses (1.0, 1.5, 2.0, and 2.5 ug/kg) of dexmedetomidine. Sedation status was evaluated by a attending anesthesiologists every 5-10 min with a 6-point sedation scale, which was modified from the Modified Observer Assessment of Alertness and Sedation Scale (MOAA/S).Successful sedation was defined as an MOAA/S of between 0 and 3. Probit analysis (linear regression plot of log concentration vs percentage response) was used to estimate the 50% and 95% effective concentration values of dexmedetomidine. MOAA/S scale: 0 Does not respond to a noxious stimulus 1. Does not respond to mild prodding or shaking 2. Responds only after mild prodding or shaking 3. Responds only after name is called loudly or repeatedly 4. Lethargic response to name spoken in normal tone 5. Appears asleep, but responds readily to name spoken in normal tone 6. Appears alert and awake, responds readily to name spoken in normal tone

Secondary Outcome Measures

Name	Time	Method
sedation induction time	up to 45 min after drug administration	Successful sedation was defined as an MOAA/S of between 0 and 3, and sedation induction time was defined as the time from midazolam and dexmedetomidine administration to the onset of satisfactory sedation
Wake -up time	up to 4 hours after drug administration	Children were classified as awake if the MOAA/S was between 4 and 6. Wake -up time was defined as the time from successful sedation until the time that the child awoke

Locations (1): Guangzhou Women and Children Medical Center
🇨🇳
Guangzhou, Guangdong, China

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