When the morphine PCA use was tracked postoperatively,
group one (AA) used 25 mg of morphine in
the first 48 hours postoperatively and reported good
pain relief, and group two (AG) used 25 mg of morphine
and also reported good pain relief. Group three
(GG) used 40 mg of morphine, had poorer pain relief,
and had many more attempts over injections on the
PCA trying to obtain a better level of pain relief