Discuss how effective is PCA for pain compared to IM prn medication for controlling pain during the first 72 hours post-operatively?

Discuss how effective is PCA for pain compared to IM prn medication for controlling pain during the first 72 hours post-operatively?

In elderly patients undergoing total knee replacement, how effective is PCA for pain compared to IM prn medication for controlling pain during the first 72 hours post-operatively? a.Identify the variables which correlate to each letter of the PICOT acronym. b.Discuss one benefit of using the PICOT approach. Provide at least three citations with full references to credible nursing scholarly articles supporting your answer.