Page 1 of 2: radiology: ai 06 pulmonary plethora

trinity · Credits: 13371 My Scrapbook

which is teh objective sign of identifying pulmonary plethora in a chest radiograph?

1) Diameter of main pulmonary artery> 16mm

2) Diameter of left pulmonary artery > 16mm

3) Diameter of descending rt pulmonary artery > 16mm

4) Diameter of descending left pulmonary artery > 16mm

drsmita_s · Credits: 18690 My Scrapbook

option 3 --Diameter of descending rt pulmonary artery > 16mm is correct. asked a radiologist.

trinity · Credits: 13371 My Scrapbook

thx smita

lazybonezzz · Credits: 54725 My Scrapbook

BUT we don have aref 4 this till now!
how r we supposed2 answer these kinda q???

manpreet108 · Credits: 30682 My Scrapbook

is this the pallas sign??

i think so--thats what we have read infinite times--
pallas sign--dilated rt pul artery--nd they just extended it a step further...

and a new thing appeared.

trinity · Credits: 13371 My Scrapbook

well but pallas sign is for pulm thromboembolism!! do we have a plethora in PE?

manpreet108 · Credits: 30682 My Scrapbook

Kanna2005 · Credits: 30412 My Scrapbook My Reading List 29 Books

Sorry Manpreet!

I can give you only hints:

DD of pulmonary plethora:

any left to right shunt:

venous congestion:

acute pulmonary oedema

And Kumar & Clark (5th Ed p 717):

Pulmonary plethora results from left-to-right shunts ( eg-ASD or VSD). It's seen as a general increase in the vascularity of the lung fields and as an increase in the size of hilar vessels (eg- in the right lower lobe artery), which normally should not exceed 16 mm diametre.

This's all what I could find for this Q

Good luck!

mishambbs · Credits: 761 My Scrapbook

ans is 3
referce sutton
there are 2 things
-1)pulm plethora-this term is used in context of CHD used to signify inc bld flow into pulm a.

2)pulm edema -this is exudation into the alveoli.pulm edema is seen in PTE becoz of hypoxia leading to epith damage

3)palla sign -as in the heart the chamber before the stenosed valve enlarges,similarly think of pulm a getting blocked by thrombus,and the upstraem part getting prominent.

hope that solves the confusion!

lazybonezzz · Credits: 54725 My Scrapbook

chd is congenital heart disease?

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