Epidural morphine on ventilatory function in chest trauma and thoracotomy patients

Area of Science:

• Anesthesiology
• Critical Care Medicine
• Respiratory Therapy

Background:

• Post-operative and trauma-related chest pain significantly impairs respiratory function.
• Effective pain management is crucial for patients requiring intensive respiratory care, including mechanical ventilation.

Purpose of the Study:

• To evaluate the efficacy of epidural morphine for pain control and respiratory improvement in intensive care unit (ICU) patients.
• To assess the impact of epidural morphine on respiratory parameters, pain scores, and potential side effects.

Main Methods:

• Nineteen ICU patients received epidural morphine (2.67 +/- 0.27 mg) one to three times for respiratory care post-chest trauma or thoracotomy.
• Respiratory parameters (tidal volume, vital capacity, respiratory rate, inspiratory force), pain scores, and arterial blood gases were monitored.
• A control group admitted during a prior period without epidural morphine was used for comparison.

Main Results:

• Epidural morphine significantly increased tidal volume (4.45 to 6.91 mg/kg) and vital capacity (8.31 to 12.81 mg/kg).
• Respiratory rate decreased (26.07 to 20.07/min), and inspiratory force improved (-13.40 to -26.53 cmH2O).
• Pain scores dramatically reduced (9.22 to 3.56), with stable hemodynamics and minimal side effects (pruritus, urinary retention) managed by naloxone.

Conclusions:

• Epidural morphine is a safe and effective method for managing pain and improving respiratory mechanics in critically ill patients.
• This analgesic strategy can be beneficial for patients recovering from chest trauma or undergoing thoracic surgery in the ICU setting.