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82 Cards in this Set
- Front
- Back
2 components of extracellular fluid volume
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Plasma volume
Interstitial Fluid Volume |
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Pressure that tends to drive fluid out of capillary
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Hydrostatic pressure
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Pressure that tends to drive fluid into capillary
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Colloid oncotic pressure
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Causes of extracellular edema
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- Increased capillary pressure (excessive kidney retention, high venous pressure, decreased resistance)
- Decreased plasma proteins (proteinuria, burns, failure to produce proteins) - Increased capillary permeability (immune reactions, toxins, bacterial infections, vit defficiency,prolonged ischemia, burns) - Blockage of lymphatic return (cancer, infections, surgery, congenital abnormalities) |
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3 stages of shock
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- Compensated hypotension
- Signs of cerebral, renal, and myocardial insufficiency and increased sympathetic activity - Severe ischemia with capillary and endothelial damage + acidosis |
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Management of shock (general)
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- Ensure adequate oxygenation
- Bladder catheter to measure urine output - Vasopressors |
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Cardiogenic treatment of shock
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Inotropic agents, Intra aortic balloon pump, diuretics, correction of underlying lesion (if possible)
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Hypovolemic treatment of shock
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Fluids/blood products
Correction of underlying pathology |
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Anaphylactic shock treatment
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Epinephrine
Antihistamines |
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Systemic illness caused by spread of microbes (or toxins) via bloodstream
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Septicemia
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Sepsis is a syndrome - T/F
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True
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Describe progression of sepsis
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SIRS --> Sepsis --> Severe sepsis --> Septic shock --> Multiorgan dysfunction syndrome
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General syndrome that may have causes other than microbial - pancreatitis, trauma, burns, ischemia, tissue injury etc
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Systemic Inflammatory Response Syndrome SIRS
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Criteria for SIRS
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Oral temperature more than 38 or less than 36 C
Respiration rate over 20 breaths a minute Heart rate over 90 beats per minute Leukocyte count over 12000 or less than 4000 or more than 10% of bands |
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SIRS + confirmed (suspected) infection
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Sepsis
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Patient presents with fever or hypothermia, tachycardia, subnormal BP, subnormal urinary output, increased CO, or decreased peripheral vascular resistance - ?
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Clinical sepsis
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Sepsis + hypotension that can be corrected by administration of fluids
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Severe sepsis
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Sepsis + persistant hypotension that cannot be corrected by administration of fluids
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Septic shock
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Patient presents with sepsis with hypotension that is unresponsive to fluid resuscitation, organ dysfunction and perfusion abnormalities - diagnosis
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Septic shock
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Sepsis + altered organ function
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MODS - multiorgan dysfunction syndrome
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#1 cause of bacteremia
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Gram positive organisms
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#1 cause of septic shock
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Gram negative rods
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Important cause of invasive fungal infections in sepsis
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Aspergillus
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Things necessary for sepsis to occur
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Large inoculum
Immune defect Microbes escape host defence Stimulation of cytokine cascade Toxin production and distribution |
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Gram negative rods risk factors
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Diabetes mellitus
Lymphoproliferative diseases Cirrhosis of liver Burns, invasive procedures, treatment with drugs that cause neutropenia |
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Bacterial mediator of sepsis in gram negative bacteria
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LPS
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Bacterial mediators of sepsis in gram positive bacteria
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Peptidoglycan
Lipoteichoic acid Superantigens |
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Extremely potent toxin - elicits production of cytokinesm activates complement cascade and activates coagulation cascade
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LPS
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Pyrogenic cytokines
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TNF alpha
IL 1 IL 6 |
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Cytokine that activates T cells
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IL 12
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Cytokine chemotactic for leukocytes
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IL8
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Pro inflammatory response leads to early or late mortality
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Early mortality
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Anti inflammatory response leads to early or late mortality
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Late mortality
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This cytokine contributes to fever, wasting, increased breathing and HR, hypotension and hemorrhages in organs
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TNF alpha
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This cytokine stimulates prostaglandin release in hypothalamus - fever, contributes to hypotension, anorexia and increase in PMN's
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IL1
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_ promotes neutrophil reactions - chemotaxis and aggregation, degranulation and radical production
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C5a
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Gram positive cocci risk factors
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Vascular catheterizations
Indwelling mechanical deves Burns IV drug use Malignancy and chemotherapy Toxin mediated (TSS) |
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Bacteria that produce superantigens
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S aureus + S pyogenes
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Activate T cells, induces huge cytokine response and septic shock - do not interact with MHC or TCR like conventional antigens
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Staph Aureus
Step pyogenes |
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Which cytokine leads to stimulation of TNF alpha and shock
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IL2
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Treatment of sepsis
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Treat with broad spectrum antibiotics until organism is identified
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This infection:
- Comes from infected foci - Associated with influx of host neutrophils - Set off inflammatory cascade - Doesnt trigger as intense TNF alpha response |
Gram positive
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This infection
- arise from within host - GI tract, billiary tract and urinary tract - may be controlled by antibody and complement - Have fewer virulence factors but do have endotoxin |
Gram negative infections
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_ sources are associated with intermittent bacteremia
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Extravascular
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_ sources associated with continuous bacteremia
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Intravascular (IE, catheter, mycotic aneurysm)
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Sickle cell patients tend to have what type of sepsis
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Salmonella
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How many blood cultures should be taken in patient with sepsis
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3 - 99% sensitivity
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p ANCA is found in what diseases
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Churg Strauss
Microscopic polyangitis PAN |
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Most common form of systemic vasculitis in adults
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Temporal arteritis
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What type of inflammation in Giant cell arteritis
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Granulomatous
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What size vessels affected in temporal arteriits
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Large and medium size
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Ophthalmic blindness - medical emergency - which vasculitis
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Temporal arteritis
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Screen test for temporal arteritis
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ESR
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Treatment for temporal arteritis
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Steroids
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What type of inflammation in Takayasu arteritis
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Granulomatous
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What size vessels in Takayasu
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Large vessels to medium sized
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In this type of vasculitis there is thickening of vascular wall and narrowing of the lumen with subsequent thrombosis
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Temporal arteritis
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40 year old Asian female with complain of coldness/numbness of fingers, visual disturbances and hypertension
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Takayasu disease
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Fibrous thickening of aorta (arch and branches) and narrowing or total occlusion occur in which type of vasculitis
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Takayasu
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PAN - what type of inflammation
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Segmental necrotizing
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What size arteries involved in PAN
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Medium size arteries
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Pulmonary involvement in PAN?
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NO
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This problem is usually dominant and cause of death in PAN
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Renal involvement
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PAN associated with what other disease
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Hep B
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Patient presents with tender erythematous nodules with central "punched out" ulcerations - diagnosis
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PAN
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Microscopic polyangitis - type of inflammation
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Necrotizing
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Size of vessels involved in microscopic polyangitis
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Small - arterioles, capillaries, venules
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Lung involvement in microscopic polyangitis?
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YES
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Patient presents with hemoptysis, hematuria, proteinuria, abdominal pain, arthralgia and muscle pain/weakness
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Microscopic polyangitis
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UA shows RBC casts -which vasculitis
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Microscopic polyangitis
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Splinter hemorrhages - which diseases
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Microscopic polyangitis
Infective endocarditis |
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Person with asthma + eosinophilia - which vasculitis
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Churg Strauss syndrome
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Childhood vasculitis
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Kawasaki disease
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Which arteries involved in Kawasaki
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Coronary arteries
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4 year old child presents with high fever, conjunctival and oral lesions, rash and lymphadenitis - diagnosis
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Kawasaki
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Necrotizing vasculitis of respiratory tract and kidneys
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Wegener granulomatosis
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Patient presents with pneumonitis and sinusitis, nodules seen on chest x ray - diagnosis
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Wegener granulomatosis
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cANCA present in _
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Wegener granulomatosis
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Peripheral vascular disease in smokers
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Buergers
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34 year old male presents with intermittant claudication and ulcers on lower leg, heavy smoker
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Buergers
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Intermittant bilateral attacks of ischemic vasospasm in skin
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Raynaud phenomenon
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Murmur in acute RF
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Mitral regurgitation
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