study_ing
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try this..its written better !
A pediatrician sees a 4-month-old boy for the first time. He had been delivered at home by his maternal grandmother, who had been a midwife in Southeast Asia before the family immigrated to the United States. According to the mother, the baby had been born on time and hadweighed about 7 pounds at birth. Physical examination is remarkable for a continuous murmur heard best at the upper left sternal border. AthrilI, analogous to a kitten's purring, can be felt over the left side of the baby's chest.
how wud the oxygen tension chnage ( as compared to a normal infant ) in th efollowing?
1. aorta
2. Pul artery
3. left ventricle
4. vena cava
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| study_ing
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what do u guys think the diagnosis is?
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| saadtazjam
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VSD??/
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| study_ing
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well ure close...
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| saadtazjam
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PDA???
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| study_ing
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yup 
now try the q
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| saadtazjam
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All i know is Step of SaO2 in pulmoanry artery if the shunt is reversed.
The rest is i am not sure but i think
LV and Aorta:Sao2 Increased
VenaCava and Pulm artery:decreased
Correct me if i am wrong:::Clueless its just a guess
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| study_ing
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ok lets think about the path of blood.
aorta--is it recieving deoxygenated blood directly? if it is, then sat s shud decrease. otherwise any shunt is the systemis circulation will have to pass thru the lungs before it reache sthe aorta again.
now give it a try
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| Guptashutosh
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diagnoses- PDA
Aorta - decrease
Pul Artery- No change/same as normal infant
Lt Ventrical - no change
vena cava- no change
correct me if i m wrong, thanks
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| robin082006
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option 2
Oxygen tension increased in pulmonory artery in PDA cases.
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| Guptashutosh
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yeah , thx
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| study_ing
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ok guys , u r right about the pulmonary artery.
y the change in the aorta if teh left ventricle is fine?
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| SilatK
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Yep aorta will have mixed blood, PDA.
No change in pulmonary artery.
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| study_ing
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does a pda produce a lt-rt shunt or a rt to left one?
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| saadtazjam
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Rt to left shunt.
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| study_ing
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which ones a higher pressure?
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| sheeezooo
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PDA has LEFT to RIGHT shunt from aorta to pulmonary artery..but saadtazjam said RT to LF shunt..??
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| study_ing
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yup ur right sheezo. hence the aorta will not have a reduced paO2
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| docnikki
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PDA---LT -->RT shunt
1. aorta - no change
2. Pul artery - inc PO2
3. left ventricle - no change
4. vena cava no change
hope all answers are right.
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| study_ing
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 Perfectly
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