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Updated: Dec 2, 2025

Guidelines for Elective Pediatric Fiberoptic Intubation
Published on: January 17, 2011
Higher doses of fentanyl during bronchoscopy in infants significantly reduces perioperative complication rates
Marinov Ts1, M Belitova1, T M Popov2
1Department of Anesthesiology and Intensive Care, Medical University-Sofia, Sofia, Bulgaria.
Insights
Higher fentanyl doses during infant rigid bronchoscopy significantly reduced perioperative complications like bronchospasm and laryngospasm. This refinement improves intraoperative hemodynamics without new risks.
Area of Science:
- Anesthesiology
- Pediatric Surgery
- Otolaryngology
Background:
- Rigid bronchoscopy is a common procedure for foreign body removal in infants.
- Anesthesia management for rigid bronchoscopy in infants aims to minimize hemodynamic instability and complications.
- Current anesthetic protocols may not fully optimize outcomes for this vulnerable population.
Purpose of the Study:
- To evaluate the impact of higher fentanyl doses on perioperative complication rates in infants undergoing rigid bronchoscopy.
- To assess the effect of increased fentanyl administration on intraoperative hemodynamic parameters.
Main Methods:
- A prospective cohort study involving 60 infants undergoing rigid bronchoscopy for foreign body removal.
- Random assignment of infants into two groups: lower fentanyl dose (1-2 μg/kg) and higher fentanyl dose (6-7 μg/kg).
- Monitoring and recording of hemodynamic parameters and perioperative complications.
Main Results:
- Infants receiving higher fentanyl doses exhibited significantly lower heart rate, systolic, and diastolic blood pressure post-intubation and post-extubation compared to the lower dose group.
- Bronchospasm and laryngospasm were significantly more frequent in the lower fentanyl dose group (p=0.020).
- The association between lower fentanyl dose and increased complications showed moderate strength (V=0.302).
Conclusions:
- Higher doses of fentanyl during rigid bronchoscopy in infants are associated with reduced perioperative complications.
- Increased fentanyl administration improves intraoperative hemodynamics in this pediatric population.
- Refinement of anesthetic protocols with higher fentanyl doses is proposed for safer infant rigid bronchoscopy.
Objectives:
The specific aim of this study was to assess the effect of higher fentanyl doses on reducing perioperative complication rates among infants undergoing rigid bronchoscopy.
Methods:
Sixty children who underwent rigid bronchoscopy for foreign body removal were enlisted in our 2-year prospective cohort study at the Department of ENT and Head & Neck Surgery, Medical University - Sofia. Infants were randomly distributed into two groups according to fentanyl dose (group 1 - 1-2 μg/kg vs group 2 - 6-7 μg/kg). Hemodynamic parameters and perioperative complications were recorded.
Results:
The mean age of the whole study group was 1.94 years. Five minutes prior to anesthesia both groups presented with similar parameter levels and no statistically significant difference was found. In contrast, at 5th and 10th minutes after intubation the heart rate, systolic and diastolic blood pressure levels were recorded at significantly higher levels in group 1 compared to group 2 (p = .000). Same results were obtained five minutes after extubation. Additionally, after performing the Pearson chi-Square test we found that bronchospasm and laryngospasm were significantly more frequent among patients from group 1 infused with lower dosage of fentanyl in comparison to the infants that were administered with a higher dose of this medication (p = .020). Phi and Cramer's V tests both display moderate strength of this association (V = 0.302).
Conclusion:
In the current study we propose refinement of current anesthetic protocols by using higher doses of fentanyl during rigid bronchoscopy in infants. This significantly reduces perioperative complication rates and improves intraoperative hemodynamics without presenting any newly formed risks.
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