Step 2 Internal Med Flashcards
(473 cards)
What kind of acid/base d/o does vomiting cause? What is the generation phase and maintenance phase? How do you correct it?
Hypochloremic Hypokalemic Metabolic Acidosis
Generation Phase - lose of gastric fluids (HCl, NaCl, and water) causes loss of acids (HCl) w/o compensatory loss of a base (HCO3-); thus a metabolic imbalance
Maintenance: B/c there’s a concomitant loss ECV, the RAAS system is turned on, via unperfused kidneys, and Aldosterone attempts to maintain intravascular volume w/ Adlosterone at the expense of K+ and H+.
Give IVF and potassium!!!
Dx a woman who presents with weight gain, fatigue, constipation, hoarseness, and vision memory changes…
MCC?
Trmt?
Hypothyroidism 2/2 Hashimoto’s; give Levothyroxine
A woman would most likely present with this d/o when pregnant w/ the S/S of: orthopnea, Afib, pulm edema, with previous infections and from Eastern Europe. What is this the leading cause of worldwide? S/S?
Dx: Rheumatic Heart Disease - declares itself in preg 2/2 increase in blood volume
Mitral Stenosis - hear diastolic rumble at apex, opening snap
Best screening lab to order in NON-African American pt for hemoglobinopathy? VS if pt is AA?
CBC if non-AA; then if abnormal, get hemoglobin electrophoresis.
Whereas if pt is AA, start with hemoglobin electrophoresis
Suspect this cardiac dz with a pt having HA’s, recurrent epistaxis, and signs of LV hypertrophy….
Xray Signs…
Defect commonly found at…
Congenital or Acquired or both?
Coarctation of the Aorta: “brachial femoral delay” can be felt on PE with notching of ribs 3-8 2/2 to erosion by intercostal arteries.
Xray would show “3” sign just distal to left subclavian artery by ligamentum arteriosum
Congenital or acquired via Takayasu vasculitis.
What would a patients neuro exam look like with suspected MS? Esp. the ocular exam…
Changing neuro defects that couldn’t be explained by a single lesion. Symptx exacerbated by hot weather or exercise is a good clue!!!
Medial Longituidnal Fasiculus involvement is characteristic in MS with complete inter nucleate opthalmoplegia (when pt looks right, R eye abducts with horizontal nystagmus with stationary L eye; when pt looks left, L eye abducts with horizontal nystagmus and R eye is stationary)
Explain categorization of Glomerulonephritis.
Types of each respective GN.
Explain how complement helps make a dx
When you see elevated Cr, proteinuria, and hematuria, suspect GN.
Nephrotic GN: proteinuria >3.5g, bland sedimentation, mild hematuria.
Nephrotic GN Types: FSGS, MCD, Membranous Nephropathy, DM, primary amyloidosis, and IgA
Nephritis GN: RBCs/WBCs, casts, mild proteinuria.
Nephritic GN Types: IgA, Lupus Nephritis, Postinfectious GN, MPGN, RPGN, and vasculitis (cryoglobulinemia with Hep C)
Low complement is associated with PostInfectious, Lupus, or Vasculitic…look for recent illness (10-21 days), positive ANA, or elevated liver enzymes/+RF respectively
How might cryoglobulinemia associated with Hep C present? What is the pathophys? Trmt?
Skin findings: palpable purpura/Raynauds
Kidney: MPGN
Nervous: motor sensory axonopathy
MSK: arthralgias
IgM against IgG Anti-Hep C Ab’s, hep C virus RNA, and complement cause deposition of the antibody complexes in endothelium, small blood vessels, etc causing inflammation and damage
Tmt: of underlying Hep C, plasmapharesis for cryoglobulins and immunosuppressants (glucocorticoids and cyclophosphamide)
How does Crohns Disease or other fat malabsorption d/o’s cause symptomatic hyperoxaluria?
Oxalate is normally bound to calcium in the gut and is therefore not absorbed. With fat malabsorption, the calcium binds with fat leaving oxalate to be absorbed.
What should be ordered in all pts with suspected CAP? Why could is be a false negative in a pt?
CXray
Might not show anything with neutropenia, dehydration, or atypical infxn (PJP)
A psoas abscess might result from hematogenous infection of skin, bone, or nearby bowel. What sign differentiates it from appendicitis?
Deep palpation and the ABSENCE of rigid abdomen, rebound tenderness or periumbilical pain.
Pt who presents with nausea, vomiting, headache, stiff neck, and myalgias is concerning for what type of meningitis?
What additional signs would you expect to see in a patient with meningococcal meningitis with meningococcemia?
Bacterial Meningitis.
Signs of hypotension, tachycardia, myalgia, and petechial/purpuric skin lesions point more towards this specific type.
Pt who presents with rhinitis, anosmia post nasal drip, and has a hx of allergy to NSAIDs most likely has what on PE?
Bilateral nasal polyps. This is highly associated with aspirin exacerbated respiratory disease.
What do you want to do with a newly diagnosed pt with Lupus?
Get a renal biopsy to determine the extent (Class I - IV); then immunosuppressive meds can be initiated
What is the post-exposure prophylaxis for the exposed healthcare workers to active Hep B?
Hep B vaccine series + Hep B Immunoglobulin
What do you do first after a pt presents with splinter hemorrhages, AR, and hematuria s/p dentist work?
Get 3 blood cultures from different sites over time for suspected Infective Endocarditis
What is the Modified Dukes Criteria for Infective Endocarditis?
Major:
1) Blood Culture + (Step Viridens, Stap Aur, or Enterococcus)
2) Echocardiographic evidence of valvular vegetation
Minor:
1) Fever
2) Predisposing Cardiac Lesion
3) IVDU
4) Emoblisms
5) Immunologic phenomena
6) Other + blood cultures
Definite Diagnosis:
2 major / 1 major + 3 minor
Possible Diagnosis:
1 major + 1 minor / 3 minor
Differentiate the different types of optho probs:
1) Diabetic Retinopathy
2) Central Retinal Vein Occlusion
3) Macular Degeneration
4) Open Angle Glaucoma
5) Retinal Detachment
1) Hard exudates, micraneurysms, retinal edema w/ progressive loss of vision - use argon photocoagulation
2) Sudden unilateral loss of vision upon waking; bulging disc, venous dilation and tortuosity, retinal hemorrhages
3) Distorted central vision with scotomas; atrophic vs. exudative - can see drussen deposits; reading and driving likely to go first; age = RF but smoking increases risk too!
4) Progressive unilateral blurriness; hanging retina in vitreous
5) Gradual loss of peripheral vision; pathologic cupping of disc causing tunnel vision
A pt with metabolic syndrome and elevated liver enzymes w/ mild to no EtOH hx make you think of?? This d/o is likely 2/2 to (patho)?
What is the histo findings?
Non-alcoholic fatty liver disease. Pts will have diabetes, be obese, hyperlipidemia, hypertension.
Patho: insulin resistance causing increased peripheral lipolysis, increased triglyceride synthesis, and hepatic uptake of FA’s leading to intrahepatic fatty acid oxidation > pro inflammatory cytokines»_space; fibrosis and cirrhosis
Histo: macro vesicular fat deposition and peripheral displacement of the nucleus (looks like AFLD)
A UTI with a pt having a urine pH > 7 makes you think of what pathogens? What hint would the question provide most likely?
Pt most likely having an indwelling catheter. A urease producing organism will cause an alkylotic pH; urease producing organisms = Proteus (struvite stones), Klebsiella, Morganella Morganii, Pseudo, Providencia, Staph, and Ureaplasma
A false + Prot S Def could be caused by what anticoagulant?
Warfarin b/c it inhibits Vit-K dependent factors 2, 7, 9, 10 and C/S
Which joints are affected early in RA? Which part of the axial spine is affected with RA with what possible side effects? What labs correlate with activity?
MTP, MCP, PIP and wrists are affected early with difficulty griping being a sensitive sign of early severe disease.
The cervical spine is the most likely affected area of the axial skeleton with the subsequent risk of subluxation and spinal cord compression.
CRP and ESR
What type of medications are preferred for weight gaining in terminal cancer pts?
Progesterone Analogs: megestrol acetate and medroxyprogesterone acetate
What pathogen causes a halo or crescent sign on pulmonary nodules in a immunocompromised pt?
Aspergillosis - it’s ubiquitous! Beware of this in patients with chronic high dosed corticosteroids, cytotoxic drug therapy, or neutropenia.