[Epidural anesthesia with high dose fentanyl for abdominal surgery]

Area of Science:

• Anesthesiology
• Pharmacology

Context:

• Epidural anesthesia is commonly used for abdominal surgeries.
• Fentanyl is an opioid analgesic often used in combination with other anesthetic agents.
• Epinephrine is sometimes added to local anesthetics to prolong their effect and improve hemodynamic stability.

Purpose:

• To evaluate the effect of epinephrine on fentanyl epidural anesthesia during elective abdominal surgeries.
• To compare the required enflurane concentration and hemodynamic changes between fentanyl with epinephrine (E+) and fentanyl without epinephrine (E-) groups.
• To assess patient recovery, pain, and respiratory depression after anesthesia.

Summary:

• A study involving 82 patients undergoing elective abdominal surgery investigated fentanyl epidural anesthesia with or without epinephrine.
• The E+ group required significantly lower enflurane concentrations for anesthesia maintenance compared to the E- group.
• Hemodynamic parameters (systolic pressure, diastolic pressure, heart rate) were reduced by approximately 18% during surgery, with no severe changes observed. Most patients recovered well with minimal pain, though some required naloxone for respiratory depression, particularly those with shorter operation times.

Impact:

• Epidural fentanyl with epinephrine may allow for reduced volatile anesthetic requirements and stable hemodynamics in abdominal surgery.
• This technique could be beneficial for patients with ischemic heart disease or poor cardiac function.
• It may not be advantageous for patients with compromised respiratory function requiring early extubation after short procedures.