• Pain · May 2017

    Does expecting more pain make it more intense? Factors associated with the first week pain trajectories after breast cancer surgery.

    • Reetta M Sipilä, Lassi Haasio, Tuomo J Meretoja, Samuli Ripatti, Ann-Mari Estlander, and Eija A Kalso.
    • aDivision of Pain Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Finland bBreast Surgery Unit, Comprehensive Cancer Center, University of Helsinki and Helsinki University Hospital, Finland cInstitute for Molecular Medicine Finland (FIMM), University of Helsinki, Finland dDepartment of Public Health, Hjelt Institute, University of Helsinki, Finland.
    • Pain. 2017 May 1; 158 (5): 922-930.

    AbstractThe aim of this study was to identify clinical risk factors for unfavorable pain trajectories after breast cancer surgery, to better understand the association between pain expectation, psychological distress, and acute postoperative pain. This prospective study included 563 women treated for breast cancer. Psychological data included questionnaires for depressive symptoms and anxiety. Experimental pain tests for heat and cold were performed before surgery. The amount of oxycodone needed for satisfactory pain relief after surgery was recorded. Pain intensity in the area of operation before surgery and during the first postoperative week and expected intensity of postoperative pain were recorded using the Numerical Rating Scale (NRS 0-10). Pain trajectories were formed to describe both initial intensity (the intercept) and the direction of the pain path (the slope). Factors associated with higher initial pain intensity (the intercept) were the amount of oxycodone needed for adequate analgesia, psychological distress, type of axillary surgery, preoperative pain in the area of the operation, and expectation of postoperative pain. The higher the pain initially was, the faster it resolved over the week. Expectation of severe postoperative pain was associated with higher scores of both experimental and clinical pain intensity and psychological factors. The results confirm that acute pain after breast cancer surgery is a multidimensional phenomenon. Psychological distress, pain expectation, and the patients' report of preoperative pain in the area to be operated should be recognized before surgery. Patients having axillary clearance need more efficient analgesic approaches.

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