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Young skier recovering from tibial fracture suddenly develops right sided chest pain and tachypnea..which finding most likely a. pO2 125 pCO2 60 b. pO2 125 pCO2 20 c. pO2 100 pCO2 40 d. pO2 80 pCO2 20 e. pO2 80 pCO2 60
robin082006 Forum Hero
Topics: 471 Posts: 5,123
06/26/06 - 07:02 AM
#2
E, pulmonary embolism ___________________ The Key to Succeed is Patience.
leen Forum Guru
Topics: 79 Posts: 294
06/26/06 - 09:09 AM
#3
E...
nadiabarati
06/26/06 - 10:24 AM
#4
the patient has tachypnea so D
Diego Casali Forum Elite
Topics: 7 Posts: 235
06/26/06 - 11:12 AM
#5
This is a case of pulmonary embolism.
This guy is hyperventilating, not hypoventilating: pCO2 cannot be normal (40 mmHg) or increased (60 mmHg).
The correct answer is D:
pCO2 is 20 mmHg (hyperventilation)
pO2 is 80 mmHg (mild hypoxemia).
robin082006 Forum Hero
Topics: 471 Posts: 5,123
06/26/06 - 11:30 AM
#6
But in pulmonary embolism, there is an anormal V/Q. Does it lead to increased PCO2 and decreased PO2?
___________________ The Key to Succeed is Patience.
nadiabarati
06/26/06 - 11:59 AM
#7
at the very beginning NO, then yes. the patient is tachpneic right now...
mjl1717 Forum Hero
Topics: 960 Posts: 5,468
06/26/06 - 12:10 PM
#8
Diego Casali wrote: This is a case of pulmonary embolism.
This guy is hyperventilating, not hypoventilating: pCO2 cannot be normal (40 mmHg) or increased (60 mmHg).
The correct answer is D:
pCO2 is 20 mmHg (hyperventilation)
pO2 is 80 mmHg (mild hypoxemia).
This is good reasoning. [yes, sometimes they say "he's blowing off his CO2]
___________________ Smell the coffee! "Is That an Osler move??"
mdx Forum Newbie
Topics: 0 Posts: 7
06/26/06 - 04:02 PM
#9
Why not B? Pulmonary embolism is OK. PAO2 (alveolar) will go up (125 ) with CO2 down (20). pO2 should be balanced with PAO2. Any reason pO2 cannot be elevated?
Cedrick Esculapio
Topics: 324 Posts: 2,058
06/26/06 - 04:07 PM
#10
and there you have it cool, tachypnea pCO2 20 and pO2 80
D
sridevibandaru24 Forum Guru
Topics: 33 Posts: 434
06/26/06 - 07:26 PM
#11
D
mjl1717 Forum Hero
Topics: 960 Posts: 5,468
06/26/06 - 07:29 PM
#12
during normal breathing or abnormal breathing at 1 atmosphere 760 mm Hg I have never heard of PO2 going to 120
___________________ Smell the coffee! "Is That an Osler move??"
mdx Forum Newbie
Topics: 0 Posts: 7
06/27/06 - 10:25 AM
#13
Remember this equation? PAO2 = (760 - 47)x0.21 - PCO2/R R is 0.8 If CO2 is 20, PAO2 will be 125 exactly. Give me an explanation if O2 does not go up, what others occupy the space then... So, I go to B.
leen Forum Guru
Topics: 79 Posts: 294
06/27/06 - 11:17 AM
#14
wont pulmonary embolism cause hypoxemia ?ie dec of O2 conc?
thanks
Cedrick Esculapio
Topics: 324 Posts: 2,058
06/27/06 - 11:35 AM
#15
Yes if you read the question it is about pulmonay embolism please read the fromthe top again
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