sample q--respiratory 2 - cappacino

[ArchivalUser]

please explain why...

87. A 45-year-old woman has a 6-month history of progressive shortness of breath on exertion. She does not smoke. Pulmonary function findings are shown (values are given as % of predicted normal):
Vital capacity 60
Forced expiratory volume in 1 second (FEV1) 70
Diffusing capacity for carbon monoxide 50
Maximum voluntary ventilation 60

Which of the following most likely explains her limited ability to increase ventilation?

(A) Airway obstruction
(B) Decreased activation of pulmonary juxtacapillary (J) receptors
© Decreased lung compliance
(D) Depression of central chemoreceptors
(E) Depression of peripheral chemoreceptors

[ArchivalUser]

DIAGNOSIS = COPD =FEV1=70% ,dec DLCO
so A

[ArchivalUser]

Ccc
Idiopathic pulmonary fibrosis or scleroderma

[ArchivalUser]

cc,
FEV1 /FVC = 70% of normal /60% of normal .....> increased FEV1/FVC .....>pulm . fibrosis

as we expect ,DL CO is decreased because of fibrosis .{reduced diffusion}

[ArchivalUser]

aa

[ArchivalUser]

I change my answer to A.

[ArchivalUser]

The answer is C.

[ArchivalUser]

Is this restricted lung dz since fev1/fvc is increased?

[ArchivalUser]

yes,cc

[ArchivalUser]

thank youuu...