EXAM TWO Flashcards
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
What is used to Stabilize the Heart with Hyperkalemia?
- Calcium Gluconate, it does NOT lower potassium levels, works within 30-60 mins to stabilize heart
What 3 Drugs can be used as Cation Exchange Resins to get rid of K+?
- Sodium Polystyrene Sulfate
- Patiromer/Veltassa
- Zicronium/Lokelma
What is the K+ Lowering Ranges of the 3 Cation Exchange Resin Drugs?
- Sodium Polystyrene Sulfate = 1 mEq
- Patiromer/Veltassa = 0.5-1 mEq
- Zicronium/Lokelma = 0.7 mEq
What other 2 MISC Agents can be used for Hyperkalemia?
- Dextrose 50% + Insulin
- Beta Agonist
How does Dextrose 50% + Insulin work for treatment of Hyperkalemia? How much K+ Lowering does it do?
- Shifts K+ Intracellularly
- 0.5 - 1.2 mEq/L
What are the treatment options for Hyperphosphatemia?
- Restrict Phosphate Containing Food
- Phosphate Binders
List the Phosphate Binders
- Aluminum Hydroxide
- Sevelamer/Renagel
- Calcium Acetate/PhosLo
What are the treatment options for Hypocalcemia?
- Fix the Phosphate
- Calcium Gluconate ONLY if Symptomatic
Calcium Homeostasis involves what organs?
- GI Tract
- Bone
- Kidneys
What is the Stimulus and Result relating to Parathyroid Hormone PTH?
Stimulus: Decreased Calcium
Result: Increased Calcium
What is the Stimulus and Result relating to Calcitriol?
Stimulus: Increase PTH
Result: Increase Calcium
What is the Stimulus and Result relating to Calcitonin?
Stimulus: Increase Calcium
Result: Decrease Calcium
What is the formula for Corrected Calcium?
Corrected Calcium = Measured Calcium + [ 0.8 x (4-albumin)]
What are the ranges of Hypercalcemia using Corrected Calcium values?
MILD = <12 – only treat if symptomatic
MOD = 12 - 13.9 – usually treated
SEVERE = >14 – immediately treated
What are the Symptoms of Hypercalcemia?
- Painful Bones
- Renal Stones
- Abdominal Groans
- Psychic Moans
What are the Principles of Treatment for Hypercalcemia?
- Rehydration/Secretion
- Stop Bone Resorption
- Treat Underlying Causes
- Remove Exogenous Sources of Calcium
What are the agents used for Hypercalcemia?
- Hydration
- Diuretics: specifically those that cause hypocalcemia
- Bisphosphonates
- Calcitonin
Causes of Hypercalcemia: VITAMIN, know N
V: vitamin A/D
I: immobilizaiton
T: thyrotoxicosis
A: addison’s
M: milk
I: inflammatory disorders
N: NEOPLASTIC DISEASES
Causes of Hypercalcemia: STRAP, know T/R
S: sarcoidosis
T: THIAZIDES, other drugs
R: RENAL FAILURE, rhabdomyolysis
A: aids
P: parathyroid disease
What is initial acute therapy for Hypercalcemia? And how does it work?
- Fluids: dilution effect as dehydration is corrected, helps increase renal calcium excretion
- Diuretics: increases urinary excretion of calcium
Can diuretics be given as mono therapy for Hypercalcemia T/F?
False, must be given with fluids
IV Bisphosphonates and RANK Ligand Inhibitors are utilized as management of Hypercalcemia, but are NOT acute therapy. When should they be administered?
The SAME time as acute treatment since they have a LONG onset
List IV Bisphosphonates used for Hypercalcemia and their MOA
- Zolendronic Acid
- Pamidronate
Inhibits osteoclastic bone resorption
List RANK Ligand Inhibitors used for Hypercalcemia and their MOA
- Denosumab
Inhibits RANKL resulting in inhibition of osteoclast recruitment, maturation, and action
What are the AEs of IV Bisphosphonates?
- Nephrotoxic
- Osteonecrosis of the Jaw
What are the AEs of RANK Ligand Inhibitors?
- Osteonecrosis of the jaw
What is used ACTUELY for Severe cases of Hypercalcemia? And what it is the AEs?
- Calcitonin: adjust therapy only use in symptomatic patients
-Tachyphylaxis, MAX 8 DOSES
What is the treatment of Mild Hypercalcemia Asymptomatic?
- Increase fluid intake
- Stop offending drugs
What are offending drugs in Hypercalcemia?
- Calcium supplements
- Thiazide diuretics
- Vitamin D
What is the treatment of Mild Hypercalcemia Symptomatic?
- Hydration
- +/- loop diuretics after hydration
- Consider IV bisphosphonates
What is the treatment of Moderate Hypercalcemia?
- Hydration
- +/- Loop diuretics after hydration
- IV Bisphosphonates
- Consider calcitonin
What is the treatment of Severe Hypercalcemia?
- Hydration
- +/- Loop diuretics after rehydration
- IV Bisphosphonates
- Calcitonin
What is Refractory Hypercalcemia?
If calcium levels remain elevated after 2 doses of bisphophonate
What can be considered in Refractory Hypercalcemia?
- Steroids
- Denosumab
- Dialysis
Neutropenic Fever is considered a medical emergency, why?
Neutropenic patients are at a higher risk for serious infections, fever is only a sign of infection
What is Nadir?
Lowest point of WBC possible
When does Neutropenia usually occur?
10-14 days of chemotherapy administration
Fever occurs >80% during chemotherapy induced neutropenia from what type of cancers?
Hematologic Malignancies
What are the 3 common sites for tissue-based infection?
- Intestinal Tract
- Lungs
- Skin
What are the 3 main components in the initial patient workup?
- H&P
- Vitals
- Medications
What is the Outpatient Treatment Criteria?
- No critical lab values
- Able to swallow PO meds
- Psychosocial/Logistic Requirement
- Prior FQ prophylaxis
Define Neutropenic Fever
- Single temperature equivalent to >38.3C (101F) orally
- Temperature >38C (100.4F) orally, sustained over 1 hour period
Define Neutropenia
- ANC <500 neutrophils/uL
- ANC <1000 neutrophils/uL and a predicted decline to <500/uL over next 48 hours
Define Prolonged Neutropenia
> 7 days
Define Profound Neutropenia
<100 neutrophils/uL
How do you calculate Absolute Neutrophil Count ANC?
[(WBC) x (% segments + % bands)]/100
What is the most common Outpatient Treatment of Neutropenic Fever?
Ciprofloxacin or Levofloxacin + Augmentin
What is used in Outpatient Treatment of Neutropenic Fever with Severe Penicillin Allergy?
Clindamycin + FQ
What is most commonly used for Inpatient Empiric Treatment of Neutropenic Fever?
- Cefepime
- Pip/Taz
IV Antibiotic Therapy for Inpatient Empiric Treatment of Neutropenic Fever must be started when?
Within 1 hour of patient presentation
If the patient has a severe beta-lactam allergy, what would inpatient therapy be for neutropenic fever?
- Vanco
- Azetreonam
- ID Consult
Cefepime has good CNS penetration and what?
NO anaerobic coverage
Does Zosyn have anaerobic coverage?
Yes
Ceftazidime has weak gram positive and no anaerobic coverage, it also has higher resistance with what?
Higher resistance with gram neg
Should Vancomycin be used in routine empiric IV coverage of Neutropenic Coverage?
NO, but can be used it needed for gram pos pathogen must reassess in 2-3 days
Is double coverage for gram negatives routinely recommended in Neutropenic Fever treatment?
NO
When would double coverage be necessary in Neutropenic Fever treatment?
- Higher risk or resistant cases
- High local resistance rates
- History of previous psudeomonas infections
When would you need additional gram + coverage for Neutropenic Fever?
- Pneumonia
- Cellulitis/SSTI
- Device/Line Inflammation
When would you need additional anaerobic coverage for Neutropenic Fever?
- Oral/GI Involvement
- Abdominal Symptoms
- Peri-Rectal Pain
When would you need additional fungal coverage for Neutropenic Fever?
- Thrush
- Invasive Fungus
When would you need additional antiviral coverage for Neutropenic Fever?
- Vesicular Lesions
What would you need to do in terms of diarrhea for Neutropenic Fever patients?
- C. diff testing
- Fidaxomicin or PO Vancomycin
Treatment Modification After Initial Presentation: Low Risk Inpatient, Clinically Stable, and Adequate GI Absorption
IV –> PO
Treatment Modification After Initial Presentation: Etiology Identified
Treat Per Infection
Treatment Modification After Initial Presentation: Persistently Febrile
Broaden Coverage and Continue Fever Workup
When should you consider empiric treatment for Antifungal in Neutropenic Fevers?
Consider addition if >4days of empiric antibiotics in high-risk patients with no symptom improvement
What are the risk factors related to Fungal Neutropenic Fevers?
- Neutropenia >10 days
- Allogeneic HCT Recipients
- High dose corticosteroids
If a patient is receiving Fluconazole for anti-yeast prophylaxis what should it be changed to?
Change to empirical anti fungal with mold coverage
If a patient is receiving Anti-Mold prophylaxis what should it be changed to?
Consider switch to alternative anti fungal with mold coverage
What drugs are consider antifungals?
- Triazoles
- Amphotericin B
- Micafungin
List all the Triazoles
- Fluconazole
- Itraconzaole
- Voriconazole
- Posaconazole
- Isavuconazole