Patient-controlled analgesia: a review

Area of Science:

• Anesthesiology
• Pain Management
• Pharmacology

Background:

• Patient-controlled analgesia (PCA) systems were developed to improve pain management.
• Early studies indicated PCA's safety and efficacy across various pain types, including surgical, cancer, and obstetric pain.

Purpose of the Study:

• To review the advantages of PCA compared to conventional analgesia in the postoperative period.
• To examine PCA's role in chronic pain management, particularly for ambulatory cancer patients.
• To identify potential adverse effects and future trends in PCA utilization.

Main Methods:

• Review of early uncontrolled trials and recent prospective, randomized trials.
• Analysis of reported outcomes including pain relief, sedation, narcotic consumption, complications, patient satisfaction, and pulmonary function.
• Assessment of preliminary results for chronic pain management and adverse event profiles.

Main Results:

• Prospective trials suggest PCA offers benefits over conventional methods in early postoperative care, including better pain relief and reduced narcotic use.
• PCA has shown potential for significant lifestyle improvements in ambulatory cancer patients with chronic pain.
• The primary adverse effect, respiratory depression, is infrequent but serious, often linked to patient predisposition or human error.

Conclusions:

• PCA is a valuable tool for postoperative pain management, with potential benefits in patient satisfaction and recovery.
• Further research is needed to fully assess the cost-effectiveness of PCA in various settings.
• Increased use of PCA, particularly epidural administration, is anticipated, especially for cancer patients.