Patient Selection

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Documentation

Patient Selection

Patient suitability must be confirmed by the responsible medical officer or anaesthetist before administering intranasal dexmedetomidine. This guide supports — but does not replace — that assessment.

Suitable Patients

Intranasal dexmedetomidine is appropriate for children who:

Are 6 months to 12 years of age (use outside this range requires senior anaesthetist review)
Require anxiolysis or light-to-moderate sedation for a procedure or premedication
Have no absolute contraindications
Are accompanied by a parent or carer who can remain present throughout
Are in a setting with appropriate monitoring and resuscitation equipment available

Particularly Well-Suited Patients

Anxious, needle-phobic, or previously traumatised children
Children undergoing brief procedures where cooperation is more important than deep sedation (IV cannulation, wound care)
Children requiring MRI where stillness rather than analgesia is the primary goal
Children as premedication before inhalational induction of general anaesthesia

Contraindications

Absolute Contraindications

Do not administer intranasal dexmedetomidine to children with:

Second or third degree AV block without a functioning pacemaker
Severe sinus node dysfunction (sick sinus syndrome) without pacemaker
Significant haemodynamic instability or shock of any cause
Nasal obstruction, trauma, or active epistaxis precluding intranasal delivery
Known hypersensitivity to dexmedetomidine or any excipient

Relative Contraindications — Seek Senior Review

Condition	Reason for Caution
Age <6 months	Limited safety and pharmacokinetic data
Known congenital heart disease	Variable haemodynamic effects; case-by-case assessment
Resting HR at lower limit for age	Increased risk of significant bradycardia
Significant respiratory compromise	Reduced physiological reserve
Concurrent sedative or opioid use	Additive sedation; unpredictable depth
Hepatic impairment	Reduced drug clearance
Weight <5 kg	Dose calculation and volume at extremes of range
Significant upper respiratory tract infection	Nasal congestion reduces intranasal absorption

Suitability Checklist

Complete before administration:

Child is aged 6 months to 12 years (or senior review obtained)
No absolute contraindications present
Resting heart rate is within normal range for age
Child is haemodynamically stable
Nasal passages are patent and unobstructed
Parent or carer is present and consents to the procedure
Appropriate monitoring is available and set up (continuous SpO₂, HR, BP capability)
Resuscitation equipment and oxygen are immediately available
Responsible medical officer has assessed and prescribed the dose
Staff present are familiar with the Monitoring protocol and Troubleshooting guide

Special Considerations

Infants (6–12 months)

Use with caution. Drug clearance is more variable, and haemodynamic effects may be more pronounced. Start at the lower end of the dose range (1 mcg/kg). Ensure senior anaesthetic involvement.

Children with Upper Respiratory Tract Infection

Nasal congestion significantly reduces absorption. Consider alternative premedication or postpone non-urgent procedures. If proceeding, nasal saline drops administered 5 minutes before dexmedetomidine may improve absorption — discuss with the responsible clinician.

Previously Failed Intranasal Administration

If a child has previously received intranasal dexmedetomidine with inadequate effect, review the dose, preparation, and administration technique before repeating. Consider whether an alternative route or agent is more appropriate.