Tumor Lysis Syndrome: Implications for Oncology Nursing Practice.

OBJECTIVES

To provide an overview of tumor lysis syndrome, which is one of the metabolic oncologic emergencies.

DATA SOURCES: A review and synthesis of empirical articles.

CONCLUSION

One of the metabolic oncologic emergencies identified by the Oncology Nursing Society is tumor lysis syndrome. This condition is life-threatening and is characterized by metabolic derangements that can lead to acute kidney injury and multiple organ dysfunction. Normal intracellular components (potassium, phosphorus, and nucleic acids) spill into the bloodstream when cancer cells die. If the tumor is large and highly responsive to chemotherapy, the resulting cascade of dead tumor cells may overwhelm normal homeostatic mechanisms. The cells enter the bloodstream faster than they can be cleared by the kidneys. This results in hyperkalemia and hyperphosphatemia. Nucleic acids convert to uric acid in the liver with a resultant hyperuricemia. Excess uric acid in the kidneys can lead to uric acid nephropathy and renal insufficiency. Phosphorus binds with calcium, leading to hypocalcemia from the formation of calcium phosphate precipitate or crystals. These crystals can also lead to renal insufficiency or acute kidney injury, which can lead to a metabolic acidosis and exacerbation of the hyperkalemic state. These metabolic derangements define presence of tumor lysis syndrome.

IMPLICATIONS FOR NURSING PRACTICE: Multidisciplinary collaboration and communication is essential to identifying patients at risk prior to treatment. Meticulous nursing care in terms of prevention and treatment is critical to patient survival.