Related Experiment Video
Updated: May 25, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
Published on: September 11, 2011
Chloral hydrate sedation in radiology: retrospective audit of reduced dose
Jennifer Bracken1, Ingrid Heaslip, Stephanie Ryan
1Radiology Department, Children's University Hospital, Temple Street, Dublin, Ireland. jenny_bracken@hotmail.com
Insights
Reduced doses of chloral hydrate (CH) provide safe and effective sedation for pediatric outpatient imaging. Lower initial CH doses did not negatively impact sedation success or timing, with no significant complications observed.
Area of Science:
- Pediatric Sedation
- Pharmacology
- Medical Imaging
Background:
- Chloral hydrate (CH) is a recognized safe and effective agent for sedating children.
- Optimizing CH dosage is crucial for balancing efficacy and safety in pediatric outpatient settings.
Purpose of the Study:
- To evaluate the efficacy and safety of reduced chloral hydrate (CH) doses for pediatric outpatient sedation.
- To determine if lower CH doses impact sedation success rates or procedural timing.
Main Methods:
- Retrospective analysis of 653 outpatient CH sedations over one year.
- Defined standard CH doses as 50 mg/kg for infants and 75 mg/kg for children over one year.
- Reduced doses were at least 20% lower than standard, with specific recommendations of 40 mg/kg for infants and 60 mg/kg for older children.
Main Results:
- 42% of children received a reduced initial CH dose.
- Overall sedation success rate was 96.7%, with higher success in infants (98.3%) than older children (95.3%).
- Reduced initial CH doses showed no negative impact on sedation outcome or time, and no significant complications were reported.
Conclusions:
- Reduced chloral hydrate (CH) doses (40 mg/kg for infants, 60 mg/kg for children >1 year) are advocated for outpatient imaging.
- This approach is recommended for children who are calm or drowsy upon arrival.
- Lower CH doses maintain safety and effectiveness in pediatric procedural sedation.
Background:
Chloral hydrate (CH) is safe and effective for sedation of suitable children.
Objective:
The purpose of this study was to assess whether adequate sedation is achieved with reduced CH doses.
Materials And Methods:
We retrospectively recorded outpatient CH sedations over 1 year. We defined standard doses of CH as 50 mg/kg (infants) and 75 mg/kg (children >1 year). A reduced dose was defined as at least 20% lower than the standard dose.
Results:
In total, 653 children received CH sedation (age, 1 month-3 years 10 months), 42% were given a reduced initial dose. Augmentation dose was required in 10.9% of all children, and in a higher proportion of children >1 year (15.7%) compared to infants (5.7%; P < 0.001). Sedation was successful in 96.7%, and more frequently successful in infants (98.3%) than children >1 year (95.3%; P = 0.03). A reduced initial dose had no negative effect on outcome (P = 0.19) or time to sedation. No significant complications were seen.
Conclusion:
We advocate sedation with reduced CH doses (40 mg/kg for infants; 60 mg/kg for children >1 year of age) for outpatient imaging procedures when the child is judged to be quiet or sleepy on arrival.
Related Concept Videos
Radiological Investigation I: X-ray and CT
Imaging Studies I: CT and MRI
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
Imaging Studies III: Computed Tomography
Stages of General Anesthesia
Radiological Investigation III: Pulmonary Angiogram and PET Scan
Pulmonary Angiogram
A Pulmonary Angiogram is an invasive procedure involving injecting a contrast medium through a catheter threaded into the pulmonary artery or the right side of the heart to visualize the pulmonary vasculature. Computed Tomography (CT) scans have mainly replaced this...
Sedatives and Hypnotics: Overview
Sedative-hypnotics are categorized into barbiturates, benzodiazepines (BZDs), and non-benzodiazepines or Z-drugs. These drugs work by suppressing central nervous system activity, and this suppression is dose-dependent. Older sedative medications, like barbiturates, follow a linear curve in...