Fatigue Management During Chemotherapy
A 65-year-old man with stage III colon cancer is undergoing adjuvant FOLFOX chemotherapy. He reports severe fatigue (rated 7/10 on a 0-10 scale) that limits his ability to walk more than one block or climb stairs. He used to walk 2 miles daily before diagnosis. He has peripheral neuropathy in his hands and feet (grade 2), making fine motor tasks difficult. His hemoglobin is 10.5 g/dL (mild anemia). He wants to improve his energy and return to walking for exercise. He is retired and lives with his wife, who is supportive. His oncologist has cleared him for light to moderate exercise but advises avoiding high-impact activities due to neuropathy and fatigue.
1. What are the potential causes of his fatigue, and how would you differentiate cancer-related fatigue from other types? What assessment tools would you use?
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Potential causes: cancer-related fatigue (CRF) from chemotherapy, anemia (Hb 10.5), peripheral neuropathy, deconditioning, and possible depression. Differentiating CRF: CRF is persistent, not relieved by rest, and disproportionate to activity level. It is a diagnosis of exclusion; rule out anemia, thyroid dysfunction, depression, sleep disturbances, and medication side effects. Assessment tools: Fatigue Severity Scale (FSS), Brief Fatigue Inventory (BFI), or Functional Assessment of Cancer Therapy-Fatigue (FACT-F). Also assess hemoglobin, iron studies, and screen for depression (PHQ-9). Neuropathy can be assessed with the Total Neuropathy Score or monofilament testing. A 6-minute walk test (6MWT) can measure functional capacity.
2. Design an exercise program that addresses his fatigue and neuropathy while respecting his medical status. Include specific parameters and safety considerations.
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Exercise program: Start with low-intensity walking (perceived exertion 11-13 on Borg 6-20 scale) for 5-10 minutes, 3-5 times per week, with rest breaks as needed. Gradually increase duration by 1-2 minutes per week as tolerated, aiming for 30 minutes of accumulated walking most days. Add light resistance training (bands or body weight) for major muscle groups, 2 times per week, focusing on balance and fall prevention due to neuropathy. For neuropathy: avoid walking on uneven surfaces; use well-fitting shoes; perform daily foot checks; include balance exercises (e.g., single-leg stance, heel-toe walking). Monitor for signs of cardiac ischemia (chest pain, dizziness) and stop if fatigue worsens. Adjust based on fatigue levels: if fatigue increases to >7/10 post-exercise and persists >24 hours, reduce intensity. Encourage energy conservation techniques (e.g., pacing, prioritize activities). Coordinate with oncologist regarding anemia management.