Patient-controlled analgesia for background pain of major burn injury

Abstract

Background: Studies have suggested that intravenous patient-controlled analgesia (IV-PCA) can be used safely for the treatment of background pain in burn patients. However, no comprehensive protocols have been published. How patient or surgical factors correlate with the amount of opioid consumption remains unclear. The aim of this study is to provide an IV-PCA protocol for alleviating pain for burn injuries, and to assess factors correlated with opioid consumption.

Methods: At the Mackay Memorial Hospital, a retrospective analysis from June 27th to October 31st of 2015 was carried out to investigate the use of IV-PCA in relation to the demographic and clinical data of patients who suffered from burn injuries due to a massive explosion of flammable powder. A standardized morphine IV-PCA protocol with rapid escalation was implemented. Variables assessed included age, weight, gender, days of usage, total surface area burned (TBSAB) and operations.

Results: Among the 23 patients who received IV-PCA for burn pain control, it was noted that the larger the TBSAB and the higher the visual analogue scale (VAS), the more amount of morphine was consumed. Correlations between morphine consumption positively with weight (P < 0.01), female gender (P < 0.01), severity of injury (P = 0.01), and negatively with receiving operations (P = 0.01) were statistically significant.

Conclusion: As the daily morphine consumption was positively correlated with TBSAB, VAS, weight, female gender, the use of our IV-PCA protocol was sufficient in the management of background pain for patients with major burn injury.

Keywords: Analgesia; Body surface area; Burns; Pain; Patient-controlled; Visual analog scale.