Tuesday, February 3, 2009

145 - respiratory system mcqs - part 4

31q: a patient with spontaneous pneumothorax involving more than 50 % of the hemithorax is best treated with ?

a. needle aspiration
b. closed drainage by tube in underwater seal
c. let spontaneous remission occur
d. open thoracotomy

answer: b . closed drainage by tube in underwater seal .

32q: hamman's crunch is seen in ?

a. caries tooth
b. fracture mandible
c. mediastinal emphysema
d. niemann-pick's disease

answer: c . mediastinal emphysema.

33q: the organism most frequently related to mediastinal fibrosis ?

a. actinomyces
b. histoplasma
c. hansen bacillus
d. staphylococcus

answer: b . histoplasma .

34q: hypercapnea at rest is most indicative of ?

a. hypoventilation
b. right to left shunt
c. impaired diffusion
d. CO poisoning

answer: a . hypoventilation .

35q: about systemic inflammatory response syndrome ( SIRS ) all are true except ?

a. leukopenia
b. hyperthermia
c. hypoxia
d. tachycardia

answer: c . hypoxia .

36q: lung abscesses are least likely to be caused by ?

a. histoplasma
b. staphylococcus
c. metastatic malignancy
d. primary carcinoma

answer: c . metastatic malignancy .

37q: primary disease causing raised PCO2 manifests as ?

a. respiratory acidosis
b. respiratory alkalosis
c. metabolic acidosis
d. metabolic alkalosis

answer: a . respiratory acidosis .

38q: the following are CNS findings of CO2 narcosis except ?

a. excitement
b. increased pH of CSF
c. decreased pH of CSF
d. papilloedema

answer: b . acidosis results due to CO2 narcosis therefore decreasing the pH .

39q: respiratory acidosis is seen with ?

a. DKA
b. pneumonia
c. emphysema
d. phenytoin

answer: c . emphysema .

40q: respiratory acidosis is seen with ?

a. starvation
b. hyperventilation
c. muscular dystrophy
d. vomiting

answer: c . muscular dystrophy .

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