Introduction:

Postoperative pain is the main cause of acute pain worldwide. Providing suitable analgesia in the postoperative period guarantees the reduction of hospital stay and has a positive impact on the final outcome of the interventions.

Objective:

To evaluate the effectiveness of postoperative analgesia with intrathecal administration of bupivacaine plus morphine in prostate surgery.

Methods:

A quasiexperimental research was carried out between January 2015 and January 2018. The sample was nonprobabilistic and made up by the patients who gave their informed consent and met criteria to enter the study. They were randomly distributed into two groups called bupivacaine (B) and morphine-bupivacaine (MB). To collect the information, the anesthetic medical records and a form prepared for this purpose were used. The results were shown in tables and graphs, expressed in absolute frequencies and percentages, some descriptive measures of interest were determined which showed the behavior of the variables that required it.

Results:

The most relevant result was the very significant analgesic effect in the MB group in the first 24 hours after surgery. The most frequent adverse reaction was pruritus and only occurred in the group that received morphine.

Conclusions:

Spinal anesthesia with morphine and bupivacaine is effective and safe, providing better analgesia in the immediate postoperative period when compared with bupivacaine alone.

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