
Chapter 66 PROCEDURAL SEDATION AND ANALGESIA OF THE PEDIATRIC PATIENT464
15. What are the advantages and disadvantages of propofol for PSA?
Advantages Disadvantages
Sedative hypnotic qualities Risk of apnea
Rapid onset and offset Hypoxia-hypoventilation, 2% to 31%
High efficacy Dose-related hypotension
Amnesia Lipophilic suspension 5 pain at injection
Constant infusion for longer procedures Needs opiate for painful procedures
Contraindicated with egg or soy allergy
16. What medications would you use for a 2-year-old with a facial laceration?
For the majority of patients, local anesthetics such as topical lidocaine, epinephrine, tetracaine
(LET) or local injection with lidocaine is sufficient. The difficulty becomes reducing the child’s
anxiety. Effective sedation can be provided with midazolam, administered intravenously,
intranasal, or orally. When this does not provide adequate sedation and motion control for a
difficult repair (i.e., laceration crossing the vermillion border of the lip), an agent such as
ketamine either intravenously or intramuscularly works well.
17. What medications would you consider for a 6-year-old needing reduction of
an angulated forearm fracture?
Fracture reduction is associated with significant pain and anxiety. Both need to be treated.
Several options can be effective and include the following: fentanyl or morphine plus
midazolam, ketamine, propofol plus an opiate, or nitrous oxide with a hematoma block.
Ketamine has been shown to have fewer adverse respiratory events when compared to fentanyl
and midazolam.
18. What makes ketamine or kidamine useful as a PSA agent?
Ketamine, a dissociative agent causing a trancelike cataleptic state, has become a more
commonly used medication for pediatric PSA. It provides strong sedation, analgesia, and
amnesia while maintaining cardiovascular stability and protective airway reflexes. Ketamine
onset is within a couple of minutes intravenously and 5 to 10 minutes intramuscularly.
Because ketamine can increase salivation, coadministration with an antisialogogue such as
atropine was previously advised, however recent studies suggest this is unnecessary, with no
increase in adverse airway effects. Coadministration of midazolam has not been shown to
decrease recovery agitation or emergent phenomena (vivid dreams, hallucinations, delirium),
but can decrease recovery emesis, which occurs in 15% to 20%. Ondansetron has also been
shown to reduce recovery emesis associated with ketamine. Ketamine, although protective of
airway reflexes, may be associated with hypoxia in approximately 5%, and rarely
laryngospasm or apnea (,1%).
19. What are the contraindications for ketamine?
Glaucoma or globe injury, increased intracranial pressure (ICP) or central nervous system
(CNS) mass lesion, seizure disorder, hypertension, congestive heart failure, major psychiatric
disorder, porphyria, previous adverse reaction, procedures or conditions that can exacerbate
laryngospasm (pharyngeal procedures, endoscopy, upper respiratory infections), or age
younger than 3 months.
20. What complications are seen with PSA?
With oversedation, there is risk for:
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Respiratory events: aspiration (from vomiting and loss of airway reflexes), hypoventilation,
hypoxia, laryngospasm, and apnea
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Cardiovascular events: hypotension, bradycardia
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Vomiting