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Published on: December 6, 2016
The performance of a postinduction fentanyl test in identifying severe obstructive sleep apnea syndrome
Ru Wu1, Xuan Wang1, Peijun Zhuang1
1Department of Anesthesiology, Children's Hospital of Fudan University, Shanghai, China.
Insights
A postinduction fentanyl test effectively identifies children with severe obstructive sleep apnea syndrome (OSAS), aiding in safer opioid use during surgery. This test helps predict respiratory risks in pediatric patients undergoing adenotonsillectomy.
Area of Science:
- Anesthesiology and critical care medicine
- Pediatric respiratory medicine
- Sleep medicine
Background:
- Children with severe obstructive sleep apnea syndrome (OSAS) exhibit heightened sensitivity to opioids.
- Identifying these children is crucial for minimizing opioid-related risks, yet it remains a clinical challenge.
- Previous research indicated that fentanyl sensitivity intraoperatively correlates with reduced postoperative opioid requirements.
Purpose of the Study:
- To assess the efficacy of a postinduction fentanyl test in accurately identifying severe obstructive sleep apnea syndrome (OSAS) in pediatric patients.
- To determine the sensitivity and specificity of this test compared to polysomnography.
Main Methods:
- A prospective, observational, assessor-blinded study involved 104 children undergoing elective adenotonsillectomy.
- A 1 µg/kg intravenous fentanyl dose was administered as a test before intubation in spontaneously breathing, sevoflurane-induced patients.
- Respiratory rates were monitored pre- and post-fentanyl administration to evaluate the test's diagnostic performance.
Main Results:
- The postinduction fentanyl test demonstrated a likelihood ratio of 7.2 and an AUC of 0.896 for identifying severe OSAS.
- A >50% reduction in respiratory rate was established as the pragmatic cut-off, achieving 87% sensitivity and 88% specificity.
- The test showed high predictive values: 85% positive and 89% negative, for detecting severe OSAS.
Conclusions:
- The postinduction fentanyl test is a valuable tool with good predictive accuracy for identifying severe OSAS in children.
- This test can help anticipate early postoperative adverse respiratory events.
- Findings provide a basis for informed postoperative analgesia strategies in pediatric adenotonsillectomy patients.
Background:
Children with severe obstructive sleep apnea syndrome (OSAS) are more sensitive to opioids. Identifying such children and reducing or even eliminating opioids are necessary but difficult. We have previously shown that patients sensitive to intraoperative fentanyl require less opioids postoperatively.
Aim:
The objective of this study was to evaluate the performance of a postinduction fentanyl test in identifying severe obstructive sleep apnea syndrome.
Methods:
A prospective, observational, assessor-blinded study was carried out with 104 sleep study assessed children undergoing elective adenotonsillectomy. Intravenous fentanyl (1 µg/kg) was administered as a test in nonpremedicated, spontaneously breathing, sevoflurane-induced patients before endotracheal intubation. The respiratory rates before and after fentanyl administration were studied. The primary outcome was the sensitivity and specificity of the postinduction fentanyl test in identifying severe OSAS compared with polysomnography.
Results:
A postinduction fentanyl test had a likelihood ratio of 7.2 (95% CI: 3.6-14.6) and an area under the curve value of 0.896 (95% CI: 0.821-0.947) to identify severe obstructive sleep apnea syndrome. The pragmatic cut-off value for the postinduction fentanyl test was found to be 50%. Using a reduction in respiratory rate of >50%, the postinduction fentanyl test detected severe OSAS with a sensitivity of 87%, a specificity of 88%, a positive predictive value of 85%, and a negative predictive value of 89%.
Conclusion:
Our study showed that a postinduction fentanyl test had good predictive value in identifying severe obstructive sleep apnea syndrome and early postoperative adverse respiratory events and could provide a reference for postoperative analgesia in children undergoing adenotonsillectomy.
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