UWorld Practice Test Section 1 Flashcards
An immunocompromised pt presents w/ a painless ulcer w/ a necrotic center and an erythematous halo. Dx?
Ecthyma gangrenosum
What organism most is most commonly associated w/ ecthyma gangrenosum?
Pseudomonas
What cardiac problem causes pulses that decrease intensity upon deep inspiration?
cardiac tamponade (this is pulsus paradoxus)
How would HSV encephalitis effect the CSF quanitities of the following: WBCs, glucose, and protein?
lymphocytic pleocytosis, normal glucose, hi protein
What, aside from WBCs and protein, is present in unusually high amounts in the CSF of pts w/ herpes encephalitis?
RBCs
What causes the rise in CSF RBCs in HSV encephalitis?
hemorrhagic destruction of temporofrontal lobes
How would acute bacterial encephalitis effect the CSF quantities of the following: WBCs, glucose, and protein?
neutrophilic pleocytosis, low glucose, hi protein
How would CHRONIC bacterial encephalitis (e.g. from M. tuberculosis) effect the CSF quantities of the following: WBCs, glucose, and protein?
lymphocytic pleocytosis, low glucose, hi protein
What is the effect of restrictive lung disease on FEV1?
low
What is the effect of restrictive lung disease on FEV1/FVC?
normal to high (80-120%)
What is the effect of chronic bronchitis or emphysema on FVC?
none! (normal value)
The most common cause of pseudo claudication is ______, which usually occurs secondary to _______.
spinal stenosis; spinal osteoarthritis
Why would a lung cancer pt develop easy bruising and hyperpigmentation?
ectopic ACTH production
How dilated must the cervix be in order to be in active labor?
4 cm
How fast should the cervix continue to dilate, once in active labor, in order to be normal progresion of labor?
> 1 cm/hr
1.2 for nulliparous, 1.5 cm for multiparous
What 3 factors must be considered when labor is protracted?
Power, passenger, and pelvis
What is a Montevideo unit, which is used to assess the adequacy of contractions using intrauterine catheters?
mmHg per 10 mins
What is considered adequate contractions in Montevideo units?
> 200
Station refers to the relationship of the presenting bony part of the fetal head in relation to the _______.
ischial spines
How often should contractions occur in order to be termed adequate?
every 2-3 mins
How long should contractions last in order to be termed adequate?
40-60 sec
