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An intrathecal fentanyl dose-response study in lower extremity revascularization procedures
S S Reuben1, S M Dunn, K M Duprat
1Acute Pain Service, Baystate Medical Center, Springfield, Massachusetts 01199.
Anesthesiology
|December 1, 1994
Summary
For elderly patients undergoing lower extremity revascularization, 40 micrograms of intrathecal fentanyl provides effective postoperative pain relief with minimal side effects. This dose ensures satisfactory analgesia for approximately 5 hours.
Area of Science:
- Anesthesiology
- Pain Management
- Geriatric Medicine
Background:
- Intrathecal opioids are standard for prolonged postoperative pain relief.
- Elderly patients undergoing lower extremity revascularization require effective analgesia.
Purpose of the Study:
- To evaluate the dose-response effects of intrathecal fentanyl in elderly patients.
- To determine optimal fentanyl dosage for postoperative pain management in this population.
Main Methods:
- Continuous spinal anesthesia was used.
- Postoperatively, patients received varying doses of intrathecal fentanyl (0-50 mcg).
- Pain scores and vital signs were monitored closely for efficacy and safety.
Main Results:
- Doses of 40 and 50 mcg provided excellent analgesia (pain scores < 1) within 10 minutes.
- Satisfactory analgesia (pain scores < 3) began at 20 mcg.
- No respiratory depression, hypoxemia, or hemodynamic changes were observed.
Conclusions:
- 40 mcg of intrathecal fentanyl offers approximately 5 hours of satisfactory analgesia in elderly patients.
- This dosage is associated with a low incidence of adverse effects.
- Intrathecal fentanyl is a safe and effective option for postoperative pain management in this demographic.