Objective: Management of post-operative pain is important for decreasing post-operative morbidity and mortality. After evaluating our pain score database of patients undergoing cardiac surgery (2007–2009) we revised our pain protocol. The new protocol allows nurses to administer analgesic medication without consulting the attending physician. The setting was a medium care unit, a nursing ward with additional monitoring of heart rate and rhythm. We investigated the effects of this revised pain protocol in a prospective consecutive cohort study.
Methods: We evaluated 193 patients treated according to the revised protocol (RP group) during the first 72 hours post-cardiac surgery on the medium care unit. A visual analogue scale (VAS) was used as pain scoring system. These patients were compared with a control group (Ctrl group) consisting of 1535 patients.
Results: Patients from the RP group had a mean VAS of 2.2 compared to a mean VAS of 2.8 in the Ctrl group (p < 0.0001). In the Ctrl group 44% of patients with a VAS ≥ 4 maintained this score for 8 hours afterwards. In contrast, in the RP group 81% had a reduction in VAS score within 3 hours. Using the new protocol there were no adverse events requiring intervention such as medication or readmission to an intensive care unit.
Conclusions: This study shows that in post-cardiac surgery patients a significant reduction in VAS scores can be safely realized by a nurse-driven protocol. Furthermore, a reduction in time to achieve an acceptable pain score (VAS < 4) was realized.
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