Prospective surveillance of patients after palliative radiation for painful bone metastases: a feasibility study.

Background: Bone metastasis is the most common cause of cancer-related pain. Radiation therapy (RT) can provide successful palliation but there is currently no consensus for surveillance after palliative radiation. This study aimed to assess the feasibility of surveillance after RT for painful bone metastases.

Methods: The study took place in an academic cancer center. Patient feasibility measures included % of calls answered, ease of recruitment and study retention. Clinician measures included % of calls made within 3 days, call time and qualitative feedback. Patients were identified with a painful bone metastasis treated with RT. The bone metastasis had a worst pain score of at least 4 (0-10 scale), with pain localized to a radiographically confirmed lesion. Patients were called at weeks 1, 4 and 8 following RT. Pain response and opioid use were assessed. Quality of life was assessed using a validated questionnaire. Descriptive statistics were used to assess if these metrics were met for patients and clinicians over 8 weeks post-RT.

Results: Twenty patients were consented: 14 participants completed treatment and were not hospitalized or deceased prior to week 1. The patients were 50% male and 50% female. Recruitment was completed quickly, with no patients withdrawing. Response rate was week 1: 85% week 4: 83% and week 8: 83%. Six patients were referred back to their provider for pain management. Calls were made to patients within 3 days a median of 63% of the time (range, 40-82%), with a median call time of 16 (range, 8-42) minutes. Call lengths were longer for patients who required interpretation. Nurse feedback highlighted length of call and nursing time available as limitations.

Conclusions: All patient feasibility measures were met. Six patients required further pain management, highlighting a need for improved follow up post-RT for bone metastases. Staffing challenges for this intervention must be overcome.