UWorld Incorrects Flashcards
(578 cards)
What affect can calcineuron inhibitors (tacrolimus, cyclosporine) have on the kidneys? What is the mechanism of this side effect?
Renal toxicity caused by vasoconstriction.
Urinalysis typically shows pre-renal etiology.
What drug can cause a false positive for PCP on UDS?
Dextromethorphan, diphenhydramine, ketamine, tramadol, venlafaxine.
What drugs can cause a false positive for Amphetamines on UDS?
Atenolol, propranolol, buproprion, nasal decongestants.
What is the management of intrahepatic cholestasis of pregnancy?
Ursodeoxycholic acid and delivery at 37 weeks.
What are symptoms of Zinc deficiency? What are physical exam findings?
Hypogonadism, impaired wound healing, impaired taste, and immune dysfunction.
Alopecia, and skin rash of erythematous pustules around body orifices and on the extremities.
When are pregnant patients screened for gestational DB? What are patients with gestational diabetes at risk for developing later?
24-28 weeks gestation.
T2DB.
What is the recommended postpartum screening for patients with gestational diabetes?
Postpartum screening with 2-hour (75g) oral glucose tolerance test performed 6-12 weeks after delivery.
If screening is negative, repeat screen every 3 years.
What is post-op endopthalmitis? What are the symptoms?
Bacterial or fungal infection of the eye (particularly the vitreous) that usually occurs within 6 weeks of surgery.
Pts have: decreased visual acuity, swollen eyelids and conjuntiva, hypopyon, and corneal edema and infection.
What is the major result of uremic coagulopathy?
Increased bleeding time due to platelet dysfunction.
What is the management of acute dystonia?
Anticholinergics: benztropine or diphenhydramine
What is the management of akasthesia?
Beta blocker, benzo, benztropine.
What is the management of medical induced parkinsonism?
Benztropine or amantadine.
What is the management of tardive dyskinesia?
Valbenzine, deutetrabenazine.
What does a Quad screen show in trisomy 18?
Decreased AFP
Decreased bhCG
Decreased estriol
Normal inhibin A
What does a quad screen show in trisomy 21?
Decreased AFP
Decreased estriol
Increased bhCG
Increased inhibin A
When are antibiotics indicated in a COPD exacerbation?
What are the cardinal features of an exacerbation?
Mod-severe exacerbation (ie 2 or more cardinal features)
OR mechanical ventilation requirement.
Cardinal features: increased dyspnea, increased cough, increased sputum production.
Adolescents commonly have what symptom of major depression?
Irritability (as opposed to sadness).
What is the most common cause of non-hereditary sensorineural hearing loss in children?
Congenital CMV infection.
The majority of cases of erysipelas are caused by what organism?
Strep pyogenes
Keep in mind erysipelas has raised, well-demarcated boreders
What substances can cause methemoglobinemia?
Dapsone, nitrites, and local/topical anesthetics.
What happens in methemoglobinemia at a molecular level?
At least one of the oxygen in Hb is oxidized to he Fe3 state (ferric). This ferric oxygen is unable to bind oxygen and also causes the other ferrous sites to bind oxygen more tightly, resulting in a left shift and therefore decreased oxygen delivery to tissues.
What does methemoglobinemia do to the pulse ox reading? What does the ABG show?
It shows ~85% no matter what the true oxygen saturation is. Supplemental oxygen does NOT improve cyanosis or the pulse ox reading.
ABG measures unbound oxygen so it will show a falsely elevated oxygen saturation level and thus a normal PaO2.
What medications have been proven to have long term survival benefits in patients with LV systolic dysfunction?
ACEi/ARBs
BBs
Mineralocorticoid receptor antagonists (spironolactone and eplerenone) - because aldosterone has bad effects on the heart
What long-term effects can analgesics have on the kidney?
CKD caused by tubulointerstitial nephritis and hematuria due to papillary necrosis.