Oncogic Emergencies Flashcards
the inappropriate, systemic activation of the regulation Cascade that results in thrombosis and bleeding / hemorrhage is what oncologic emergency
disseminated intravascular coagulation
clot formation is also known as
thrombosis
clot breakdown is also known as
fibrinolysis
how is the process of thrombosis initiated?
through the destruction of the endothelial membrane and tissue injury.
tissue injury causes the release of_______ _______ into the circulation which leads to coagulation
tissue thromboplastin
what enzyme digests the components of a fibrin clot?
plasmin
what is the proteolytic enzyme that is responsible for both coagulation and fibrinolysis?
thrombin
what underlying conditions in the oncology patient may lead to excess circulating thrombin?
infection, malignancy, or trauma
excess thrombin results in what problem in the circulation?
multiple fibrin clots
excess clots in the circulatory system results in platelet traps which then causes what condition?
microvascular and macrovascular thrombosis
clot lodged in the vascular system leads to what problem?
ischemia, impaired organ perfusion, end-organ damage
the excess use of the coagulation factors in DIC is unable to be replaced which then leads to what problem?
excessive bleeding
excess plasmin in the circulatory system leads to what symptoms in DIC
shock, hypotension, increased vascular permeability
what diagnostic tests are done to diagnose disseminated intravascular coagulation,?
platelet count, fibrinogen level, D-dimer assay, FDP ( fibrin degradation products) titer
what tests are done to determine if accelerated quag ulation is a problem?
antithrombin III level, fibrinopeptide A level, prothrombin activation peptides, thronbin- antithrombin complexes
what tests are done to determine if accelerated fibrinolysis is a problem?
plasminogen level, plasmon Alpha 2 anti plasmin complex levels
what is the main goal of treatment related to DIC?
treatment of the underlying condition causing DIC, supporting the hemodynamics, manage the bleeding or thrombosis
how is the underlying condition for DIC typically treated?
chemotherapy for malignancy, antibiotics for infection
what hemodynamic support is often used in the patient with the DIC?
fluid replacement, oxygen therapy, administration of platelets, red blood cells, fresh frozen plasma, fibrinogen, cyroprecipitate
what treatment is used to replace quag ulation factors?
plasmapheresis
what does plasmapheresis do to help the patient with DIC?
it removes the triggers of coagulation
what lab values are decreased in the patient with DIC?
platelet count, fibrinogen level, antithrombin 3 level, plasminogen level, plasmon Alpha 2 antiplasmin complex
what lab values are increased in the patient with DIC?
D-dimer assay, fdp tighter, fibrinopeptide A, prothrombin activation peptides, thrombin antithrombin complex
What patients are at increased risk for developing DIC?
acute leukemia, mucin producing solid tumors, infection and sepsis, liver disease, hemolytic transfusion reactions, transplant reactions, Burns, trauma, pregnancy and obstetric complications, peritoneovenous shunts
what is the most common cause of DIC?
sepsis / infection
what are the early signs and symptoms of DIC in the skin?
pallor, petechiae, jaundice, ecchymosis, hematomas, bleeding, acral cyanosis
what are the early signs and symptoms of DIC in the GI system?
tarry stools, hematemesis, abdominal pain, abdominal distension
what are the early signs and symptoms of DIC in the GU system?
hematuria, decreased urinary output
what are the early signs and symptoms of DIC in the respiratory system?
dyspnea, tachypnea, hypoxia, hemoptysis, cyanosis
what are the early signs and symptoms of DIC in the neurological system?
headache, restlessness, confusion, lethargy, altered level of consciousness, obtundation, seizures, coma
what are the early signs and symptoms of DIC in the musculoskeletal system?
joint pain and stiffness
what are the early signs and symptoms of DIC in the cardiovascular system?
tachycardia, hypotension, diminished peripheral pulses, changes in color and temperature of extremities
What nursing interventions will help maximize patient safety in the diagnosis of DIC?
fall precautions, assistance for adl’s, bleeding precautions, discourage dangling feet and pressure causing devices
what are the signs and symptoms of progressing DIC?
septic shock symptoms, proteinuria, anuria, decreased mental status, changes in breathing, bleeding
what important patient education should take place in the patient with known or suspected DIC?
signs and symptoms of DIC, report new bleeding, save all urine, emesis and stool for the nurse to check, bleeding precautions
the systemic inflammatory response to a documented infection is known as
sepsis
sepsis is the inflammatory response to what in the blood?
pathogenic microorganisms and associated endotoxins
sepsis usually presents with two or more of what signs and symptoms?
temperature greater than 100.4, heart rate greater than 90 BPM, respiration rate greater than 20 breaths / minutes, WBC greater than 12000 or less than 4000, or greater than 10% bands
sepsis results when the body fails to initiate an adequate___________ to an infection.
immune response
what are the signs and symptoms of septic shock?
fever, chills, tachycardia, tachypnea, mental status changes, hypotension
what are the phases of septic shock?
infection, bacteremia, systemic inflammatory response syndrome, sepsis, severe sepsis, septic shock, multiple organ dysfunction syndrome
what is the most common source of infection related sepsis?
bacterial organisms
which gram-negative organisms are common in septic shock cases?
e-coli,klebsiella pneumonia, pseudomonas aeruginosa
which gram-positive bacteria are most commonly associated with septic shock cases?
streptococcus pneumonia, staphylococcus aureus
which patients are at increased risk for gram-positive bacterial infections?
patients with vascular access devices, and those with a lack of mucosal integrity
patients with fungal infection related sepsis are at an increased risk for what problems?
increased length of hospitalization and death
where do most infections arise in the oncology patient?
endogenous Flora
mortality from sepsis is associated with what three factors?
causative organism, site of infection, level of duration of neutropenia
what are the basic infection control precautions?
good hand-washing, oral and perianal care, identification of patients at risk for infection, avoidance of invasive procedures
what diagnostic procedures are done to diagnose and treat sepsis?
blood cultures, chest x-ray, cultures of erudite, CBC, electrolytes,LFTs, PTL, PTT, ABGs, EKG
what tests are done to diagnose the degree of organ failure in a patient with sepsis?
echocardiogram, CT scans, ventilation perfusion scan, angiography
what is done to maintain hemodynamic support in the patient with sepsis?
administration of fluids, blood transfusions, vasopressors, oxygen therapy
what base oppressors are used to combat hypotension in the patient with sepsis?
dopamine, norepinephrine, dobutamine
what is the treatment recommendations for the patient with sepsis?
empiric antibiotics started at the first sign of sepsis
when is empiric antifungal therapy started in the patient with sepsis?
five to seven days after empiric antibiotic therapy has been started and the patient continues a fever
what are the risk factors for sepsis?
immunosuppression either from therapy or malignancy, comorbidities, age greater than 65, invasive devices, loss of skin or mucosal integrity
what comorbidities put a patient at increased risk for sepsis?
diabetes, renal, hepatic, cardiovascular, and / or pulmonary disease, GI abnormalities
a life-threatening metabolic imbalance that occurs with a rapid release of potassium, phosphorus, and nucleic acid into the bloodstream due to tumor cell kill is known as
tumor lysis syndrome
what electrolyte abnormalities are present in tumor lysis syndrome?
hyperkalemia, hyperphosphatemia, hyperuricemia, hypocalcemia
why is the calcium decreased in tumor lysis syndrome?
increased phosphorus binding to the calcium to form phosphatase salts
what does tumor lysis syndrome lead to in the cancer patient?
cardiac arrhythmias, renal failure, multi-system organ dysfunction
why do cancer patients with tumor lysis syndrome develop renal failure?
kidneys are the primary route of excretion of phosphatase salts, uric acid, and potassium and they become over taxed
what tests are done to diagnose and monitor for tumor lysis syndrome?
LDH, bun, creatinine, serum electrolytes
what is the treatment for tumor lysis syndrome?
IV hydration, alkalinization of urine, decrease the production of uric acid with medication, diuretics, manage electrolyte imbalances
what type of diet would be recommended in a patient with tumor lysis syndrome?
low potassium and low phosphorus
what foods are high in potassium?
bananas, oranges, orange juice, tomatoes
what foods are high in phosphorus?
eggs, meat, fish, nuts, cheese, bread, poultry, legumes, cereal, carbonated drinks