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[Preventing Crying after Revascularization Surgery in Pediatric Patients with Moyamoya Disease:Sedation with
Kaori Honjo1, Toshiaki Osato, Satoshi Omori
1Department of Neurosurgery, Nakamura Memorial Hospital.
Insights
Dexmedetomidine effectively sedated pediatric moyamoya patients post-surgery, preventing crying and hypocapnia without adverse effects. This ensures hemodynamic stability and reduces ischemic event risk in young children.
Area of Science:
- Pediatric Neurology
- Neurosurgery
- Anesthesiology
Background:
- Hyperventilation is a significant risk factor for ischemic events in pediatric moyamoya disease patients.
- Crying can destabilize hemodynamics post-surgery, increasing ischemic risk in young children.
- Dexmedetomidine (DEX) was used for sedation to prevent crying after revascularization surgery.
Purpose of the Study:
- To evaluate the impact of postoperative DEX on hemodynamic changes.
- To assess DEX's effectiveness in preventing crying and hypocapnia.
- To determine the safety and utility of DEX in pediatric moyamoya patients.
Main Methods:
- Ten pediatric patients underwent revascularization surgery.
- Postoperative sedation with DEX (0.4μg/kg/hr) was administered under spontaneous breathing.
- Dose was adjusted to maintain a Ramsay scale sedation score of at least 3.
Main Results:
- All patients achieved adequate sedation without hypocapnia.
- No ischemic complications were observed post-surgery.
- No respiratory depression, significant changes in respiratory rate, SpO2, systolic blood pressure, or heart rate occurred.
Conclusions:
- Dexmedetomidine is a safe and effective sedative for pediatric moyamoya patients post-revascularization.
- DEX helps prevent crying and maintain hemodynamic stability, reducing ischemic event risk.
- The drug is well-tolerated, with no significant adverse cardiovascular or respiratory effects.
Background:
Hyperventilation is a well-known risk factor of ischemic events in pediatric patients with moyamoya disease. For young children, it is important to avoid crying to prevent ischemic events because of their unstable postoperative hemodynamics. To prevent crying in pediatric patients, we used dexmedetomidine(DEX)for sedation immediately after revascularization surgery.
Objective:
We investigated the effects of postoperative DEX use on hemodynamic changes and the avoidance of crying and hypocapnia in pediatric patients with moyamoya disease.
Case:
Ten consecutive patients(5 boys and 5 girls)who underwent surgical revascularization were enrolled, and 16 hemispheres(8 boys and 8 girls)were sedated with DEX postoperatively between August 2011 and August 2016.
Methods:
During extubation after revascularization, DEX was started at 0.4μg/kg/hr under spontaneous breathing and its dose was increased depending on the degree of consciousness, to maintain sedation of at least 3 on the Ramsay scale. DEX administration was terminated the next morning.
Results:
Sedation was maintained well in all patients without hypocapnia, and no ischemic complications were observed. One patient cried and needed additional intravenous DEX injections and was immediately re-sedated;no hypocapnia developed. Respiratory depression did not occur and changes in respiratory rate and decreases in SpO2 were not observed. No significant changes in systolic blood pressure and heart rate were observed.
Conclusion:
Dexmedetomidine is safe and useful for postoperative sedation in children with moyamoya disease.
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