Recognition
- Polycythemia vera (PV): A myeloproliferative neoplasm (bone marrow cancer) driven by the JAK2 V617F mutation in ~95% of cases. The mutation causes uncontrolled proliferation of RBCs independent of normal erythropoietin (EPO) regulation, often with concurrent elevation of WBCs and platelets. Typically presents in adults over 60, slightly more common in males.
- Secondary polycythemia: Appropriate physiological response to chronic tissue hypoxia — the body produces more RBCs to improve oxygen delivery. Causes include chronic lung disease (COPD), living at high altitude, heavy smoking (carbon monoxide displaces oxygen on hemoglobin), obstructive sleep apnea, and EPO-producing tumors (renal cell carcinoma, hepatocellular carcinoma).
- Relative polycythemia: Not a true increase in RBC mass — reduced plasma volume (dehydration, burns, diuretic use) concentrates existing RBCs, raising the hematocrit without actual overproduction.
- Hallmark signs: Ruddy, plethoric (flushed, reddish) complexion — the most visible finding. Pruritus (itching), characteristically worse after a warm bath or shower (histamine release from elevated basophils). Headache, dizziness, tinnitus, and visual disturbances from hyperviscosity. Splenomegaly and hepatomegaly. Erythromelalgia — burning pain and redness in the hands and feet.
- Thrombotic complications: DVT, stroke, MI, and PE are the primary causes of morbidity and mortality. Paradoxical bleeding may also occur despite the thrombosis risk, due to platelet dysfunction in extreme thrombocytosis.
MT Relevance
- Thrombosis awareness: Clients with PV are at elevated baseline risk for thrombotic events. Monitor for signs of DVT (unilateral limb swelling), stroke (neurological changes), or MI (chest pain) during treatment. Standard precautions for thrombus risk apply.
- Avoid hot modalities: Hot stone massage, prolonged hot packs, and excessive heat trigger pruritus (intense itching) and may affect vascular dynamics. Use warm (not hot) applications only.
- Moderate pressure: Avoid deep tissue work that could theoretically affect thrombus stability. Standard Swedish massage at moderate pressure is generally safe.
- Anticoagulant and antiplatelet awareness: PV clients are commonly on aspirin (antiplatelet) and may be on anticoagulants for thrombotic complications. Both increase bruising risk — adjust pressure accordingly.
- Hydration: Encourage pre- and post-session hydration. Dehydration increases blood viscosity and worsens the underlying problem.
- Avoid prolonged immobility during treatment: Periodic position changes help prevent venous stasis in clients already prone to clot formation.
Required Actions
- Sudden severe headache, visual changes, chest pain, unilateral limb swelling, or confusion during treatment — possible thrombotic event. Stop treatment, call 911
- New or worsening pruritus during treatment — reduce heat exposure, cool the room, and adjust modalities
Key Takeaways
- Polycythemia vera is a myeloproliferative neoplasm driven by the JAK2 mutation — uncontrolled RBC production creates hyperviscosity and thrombosis risk
- Blood viscosity is the central clinical problem, creating risk for DVT, stroke, MI, and PE
- Pruritus triggered by warm water or heat is a characteristic symptom — avoid hot modalities
- Moderate pressure with standard Swedish techniques is appropriate. Avoid deep tissue work
- Aspirin and anticoagulant use require pressure modification to prevent bruising
- Encourage hydration to counteract hyperviscosity