EXAM TWO Flashcards
(238 cards)
What are the 3 types of Oncologic Emergencies?
- Metabolic
- Structural
- Hematologic
What is Tumor Lysis Syndrome TLS?
Release of intracellular components into the bloodstream following cell lysis = metabolic abnormalities
Define Hyperuricemia
Uric Acid >8 mg/dL or 25% increase from baseline
Define Hyperkalemia
Potassium >6 mEq/L or 25% increase from baseline
Define Hyperphosphatemia
Phosphorous >6.5 mg/dL or 25% increase from baseline
Define Hypocalemia
Calcium <7 mg/dL or 25% decrease from baseline
What are the Risk Factors for TLS?
- Uric Acid >8 mg/dL at baseline
- Allergy to Allopurinol
- WBC >50,000
- LDH >500 units
- Creatinine >1.8
What is the presentation of Hyperkalemia?
- Muscle Cramps/Weakness
- N/V/D
- EKG Changes/Arrhythmias
What is the presentation of Hyperuricemia?
Acute Renal Failure
What is the presentation of Hyperphosphatemia?
- Muscle Cramps
- Seizures
- Arrhythmias
- Renal Failure
What is the presentation of Hypocalcemia?
- Muscle Cramps
- Tetany
- Mental Status Changes
What 4 things can be considered in the Prevention of TLS?
- Agressive IV Fluid Hydration
- Close Electrolyte Monitoring
- Discontinue Contributing Agents
- +/- Anti-Hyperuricemic Agents
Aggressive IV Fluid Hydration in Prevention of TLS includes what?
Normal Saline 2-3 L/m2/day for 1-2 days prior to therapy
Step 3 of Preventing TLS is to DC Contributing Agents, list all agents:
- ACE/ARBs
- Diuretics
- Potassium Chloride
- Sodium Phosphate
- Supplements/Vitamins
Low Risk of TLS +/- Anti-Hyperuricemic Agents
- Hydration
- Clinical Consideration
Intermediate Risk of TLS +/- Anti-Hyperuricemic Agents
- Hydration
- Allopurinol
High Risk of TLS +/- Anti-Hyperuricemic Agents
- Hydration
- Rasburicase
Hyperuricemia is the most common lab finding for TLS and prevention is aimed here, when does it usually occur?
48-72 hours after treatment
What are the 2 Antihyperuricemic Agents?
- Allopurinol
- Rasburicase
Allopurinol Indication and MOA
- PREVENTION ONLY
- Xanthine Oxidase Inhibitor: prevents formation of more uric acid, does not decrease the amount already present
Allopurinol AEs and Max Dose
- Rash
- Urticaria
- MAX = 800 mg/day
Rasburicase Indication and MOA
- Prevention AND Treatment
- Recombinate Urate Oxidase: breaks down uric acid into allantoin
Rasburicase AEs
- Hypersensitivity
- Methemoglobinemia
- Headache
- Peripheral Edema
Hyperkalemia is an Immediate Threat because it can lead to cardiac death, when does it occur?
6-72 hours, EKG changes